CN102264995B - System and method for delivering a cable downhole - Google Patents
System and method for delivering a cable downhole Download PDFInfo
- Publication number
- CN102264995B CN102264995B CN200880132211.3A CN200880132211A CN102264995B CN 102264995 B CN102264995 B CN 102264995B CN 200880132211 A CN200880132211 A CN 200880132211A CN 102264995 B CN102264995 B CN 102264995B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- connector
- fluid
- receiver
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
A system for delivering a cable through a tubing string to a downhole location in a well, includes a plug and a receiver. The plug includes a first connector configured to be operably connected to the cable and further includes a plug housing adapted to fit within the tubing string. A check valve operably associated with a passage in the plug housing restricts fluid flow through the passage in a downhole direction and allows fluid flow through the passage in an uphole direction. The receiver is configured to be positioned at the downhole location and includes a receiver housing and a second connector configured to be operably connected to a downhole device. The second connector is adapted to communicate with the first connector when the receiver and plug housings are engaged.
Description
Technical field
The sedimentary recovery in relate generally to underground of the present invention, more specifically, relates to the method and system for removing produced fluid from well.
Background technology
The impact of the production problem caused by solid particle that horizontal seam gas well is especially easily existed in the wellbore and assembles.Such as, at the life period of horizontal seam gas well, can together produce the little coal particle (term is fine breeze) of many tons along with gas and water.At the commitment of well, these solid particles can not form how many problems to manufacturing process usually.The water of high flow rate and gas produce enough large speed and make solid particle keep being entrained in and produce in fluid and move towards the pumping equipment be arranged in well in pit shaft.At the entrance of pump, solid particle keeps carrying secretly in the liquid phase and being extracted out by from well again.
At the later stage in coal bed gas well life-span, fine breeze may just start to have thrown into question to production.Only gas flow can not take away solid particle along pit shaft, and the solid particle causing those to be detained is deposited in the low-angle undulation of pit shaft by this.These solid particles finally can form the restriction of air current flow, and can cause production declining.In addition, the solid particle near those entrances being deposited in pump may block the entrance of pump, thus reduces the ability that water got rid of by pump from pit shaft.
Borehole stability problem also can have an impact to the production problem of well.In some cases, pit shaft may collapse and can precipitate bulk in the wellbore, the coal of middle piece and small pieces.Cuboidal coal grain can form the flowing of bridge and then restriction downhole well fluid easily in pit shaft.This restriction can cause the precipitation of entrained solid particles further.
Shown in figure 1, well 100 comprises pit shaft 105, and pit shaft 105 has substantially vertical part 110 and approximate horizontal part 115.Pit shaft 105 extends to from ground surface 120 stratum 123 be positioned at below ground surface 120.Pump 125 is positioned at the approximate horizontal part 115 of down-hole and is electrically connected to the power supply 128 being positioned at ground surface 120 by transmission yarn 126.Pump 125 is arranged to remove the liquid 127 (such as water) produced by stratum 123.Liquid is sucked into the cistern 133 of ground surface 120 by pipeline (tubing string) 130.In order to aforementioned example is described, well 100 can be the coal bed gas well piercing coal stratum.The sediment 135 of solid particle (such as coal) may to be gathered in pit shaft and can to block the entrance of pump 125.
Be used for overcoming certain some place injection additive fluid that solid particle method of sedimentation problem in well is included in well, water or gas, increase fluid-flow rate thus.But the increase of fluid-flow rate can worsen producing formation with the form of additonal pressure.Further, production equipment must process the fluid of the injection of additional volume.The system that another kind is used for removing pit shaft uses agitating device to vertically move in wellhole.This system is effective in agitaion, but the solid particle increased suddenly may cause equipment to block and a whole set of plant equipment can not be used.The poor efficiency that these two systems have and problem are all solved by the system and method for detailed description of the invention as described herein.
There is the other problems relevant with the use of the pump of down-hole in the water removing the solid particle of gathering from well.Become complicated due to the installation that provides the cable of the pump of electric power to make pump to the motor of pump must be processed and remove.Between the installation period of pump, first transmission of electricity cable meets (splice) on the wire of motor.Then when pump is transferred in well, cable is attached to discharge pipe.Multiple method can be used to be attached on pipe fitting by cable, to comprise fixture, adhesive and special attachment arrangement.
When pump is installed in well, the cable of pump is subject to the risk being easy to due to ground surface wearing and tearing and fragmentation damage.When pump is rapidly through the leg portion of well, risk enlarges markedly.The flat ladle cable of frequent use reduces these risks; But this special cable is expensive and only provide and fall low-risk increase grade.
Summary of the invention
The system and method for method institute produced problem all described by exemplary detailed description of the invention here that the existing method to delivered downhole electric power and solid particle remove solves.In a detailed description of the invention, provide a kind of for providing the system of electric power to the down well placement in well.Described system comprises and is positioned pump in well and pipeline, and described pipeline is communicated with to receive the liquid of discharging from described pump with pump fluid.The cable that described system also comprises connector, receiver and is communicated with power supply.Described connector comprises at least one electric conductor with described cable electric connection, and comprises and be suitable for being assembled to the plug body in described pipeline.Described plug casing comprises and allows fluid to flow through the passage of plug casing, and the flap valve operationally associated with the passage of plug casing.Described flap valve limit fluid is to downhole to flowing through described passage and allowing fluid to flow through described passage to aboveground direction.Described receiver is positioned described down well placement and comprises receiver shell and at least one electric conductor with described pump electric connection.When described receiver shell and plug casing engage, at least one electric conductor of described receiver is suitable at least one the electric conductor electric connection with described connector.Described receiver shell also comprises the passage be communicated with pump fluid with described pipeline.
In another detailed description of the invention, a kind of system of the down well placement for being transported in well by pipeline by cable comprises connector and receiver.Described connector comprises the plug body being suitable for being assembled in pipeline and the first connector being configured to be operably connected to described cable.Described plug body comprises the passage allowing fluid to flow through described plug body.Flap valve and the passage of plug body operationally associate with limit fluid to downhole to flowing through described passage and allowing fluid to flow through described passage to aboveground direction.Described receiver is configured to be positioned at described down well placement and comprises receiver shell and the second connector being configured to be operably connected to underground equipment.When receiver shell and plug casing engage, the second connector of described receiver is suitable for being communicated with the first connector of described connector.
In another detailed description of the invention again, provide a kind of method for cable to be transported to the down well placement in well by pipeline.Described method is included in described down well placement and arranges receiver, and described receiver has the electric conductor be communicated with underground equipment.Fluid is introduced in described pipeline at the ground surface of described well, and connector is positioned in described pipeline.Described connector comprises the electric conductor be communicated with cable.Described method also comprises the aboveground pipeline by fluid pump being sent into described connector and connector is transported to described down well placement.Described connector engages with receiver and the electric conductor of described connector is communicated with the electric conductor of described receiver.Electric power is transported to described underground equipment by cable from the ground surface of described well.
In one embodiment, a kind of system for the solid particle in the pit shaft of control well is provided.Described system comprises the pump be positioned in the approximate horizontal part of described pit shaft.First pipeline is operatively coupled between described pump and the ground surface of well, for removing by the liquid of described pump pumping in described pit shaft.Second pipeline is connected to described pump operably, and extends to the down-hole of described pump.Described second pipeline comprises the longitudinal axis of the axis of rotation skew that can rotate around it from described second pipeline.
In another embodiment, a kind ofly cavity pump is comprised for the system of solid particle in the pit shaft of control well.Described cavity pump is positioned in the approximate horizontal part of described pit shaft, and is included in the interior rotor rotated of stator to remove liquid and entrained solid particle in described pit shaft.Described rotor is axially movable between bonding station and disengaging configuration.Described locating pipeling is in the down-hole of described cavity pump, and the Offset portion that the longitudinal axis that described pipeline comprises wherein said pipeline offsets from axis of rotation.Drive rod operationally associates with in pipeline with described rotor, and receiver operationally associates with another in pipeline with described rotor.When described rotor movement to bonding station with by the rotary motion transmission of described rotor give described pipeline time, described receiver receives described drive rod.
In another embodiment again, provide a kind of system for the solid particle in the pit shaft of control well.Described system comprises the pipeline be positioned in the approximate horizontal part of described pit shaft.It is nonlinear that the longitudinal axis of described pipeline has longitudinal axis at least partially, makes the axis of rotation skew that described pipeline can rotate around it from described pipeline.Pump is positioned to remove liquid and entrained solid particle from pit shaft in described pit shaft, and circulator is positioned the ground surface of well to rotate described pipeline.
In another embodiment, a kind of system for the solid particle in the pit shaft of control well comprises the liquid removal device of the down-hole be positioned in described pit shaft.Described system also comprises the agitating device of the down-hole being positioned described liquid removal device to stir solid particle and to make solid particle be entrained in fluid, thus is removed by described liquid removal device.
In another detailed description of the invention again, provide a kind of from have in pit shaft liquid well pit shaft in remove the method for solid particle.Pipeline is rotated around axis of rotation, to stir solid particle and to make solid particle carry secretly in a liquid in the horizontal component that described method is included in pit shaft.The Offset portion that the longitudinal axis that described pipeline comprises wherein said pipeline offsets from axis of rotation.Described method also comprises remove described liquid and entrained solid particle from described pit shaft.
In another detailed description of the invention, a kind of system for the solid particle in the pit shaft of control well comprises and is positioned pump in pit shaft to remove liquid and entrained solid particle in described pit shaft.Be connected to line fluid described pump with by liquid from described transport pump to the ground surface of well, and described pipeline comprises spiral section.The ground surface place being rotated in well of described pipeline makes the movement in described pit shaft of described pump be blocked by the solid particle in pit shaft with the entrance reducing described pump.
Other objects of the present invention, feature and advantage can be clearer with reference to accompanying drawing, detailed description and described claim.
Accompanying drawing explanation
Fig. 1, exemplified with the well with approximate horizontal part, wherein have accumulated liquid and solid particle sediment in approximate horizontal part;
Fig. 2 depicts the system for solid particle in the pit shaft of control well according to exemplary detailed description of the invention;
Fig. 3 is exemplified with the detail drawing of the Offset portion of the pipeline of Fig. 2 system;
Fig. 4 depicts the system for solid particle in the pit shaft of control well according to exemplary detailed description of the invention;
Fig. 5 is exemplified with the system for solid particle in the pit shaft of control well according to exemplary detailed description of the invention, and this system has the electric submersible pump communicated with control unit via communication line;
Fig. 6 A depicts the system for cable being transported to down well placement, and according to exemplary detailed description of the invention, described system comprises connector and receiver;
Fig. 6 B is exemplified with the connector of the system of Fig. 6 A according to exemplary detailed description of the invention;
Fig. 6 C is exemplified with the alternative connector according to Fig. 6 A of exemplary detailed description of the invention.
Fig. 6 D is exemplified with the receiver of the system of Fig. 6 A;
Fig. 6 E depicts the connector of Fig. 6 B being in bonding station and the receiver of Fig. 6 D;
Fig. 7 is exemplified with the system for solid particle in the pit shaft of control well according to another exemplary detailed description of the invention, and this system has the cavity pump being configured to the rotor optionally rotating pipeline Offset portion; With
Fig. 8 depicts the cavity pump of Fig. 8 and the detail drawing of pipeline.
Detailed description of the invention
In the detailed description of carrying out exemplary detailed description of the invention below, with reference to the accompanying drawing as its component part.These detailed description of the invention describe enough detailed, those skilled in the art are made to implement the present invention, but should be understood that, also can use other detailed description of the invention, and can make under the prerequisite not departing from the spirit or scope of the present invention logical construction, machinery, electricity with chemical in change.In order to avoid describing the details that those there is no need to illustrate for those skilled in the art, this description will omit information well known by persons skilled in the art.Therefore the detailed description below will be not used in restrictive, sense, and defining of exemplary detailed description of the invention scope is only as the criterion with claim appended below.
The specific embodiment of the present invention as described herein points to the system and method through improving of the blocking for keeping pit shaft to cause from solid particles, and it is realized to stir those solid particles by the axial-rotation of component in pit shaft at least partly.Rotating member preferably includes Offset portion, and described in Offset portion, the longitudinal axis of rotating member is from the rotational axis offset of rotating member, and described rotating member rotates around described rotation.In a detailed description of the invention, rotating member can be the specifically-built pipeline be positioned in the horizontal component of well.Pipeline can be pre-formed with screw type conveyor screw and make the rotation of pipeline that pipeline will be caused along the circumference of whole length of pipeline " wiping " pit shaft.Spirochetal " direction " makes to rotate and preferably puts mobile solid particle towards the extraction in pit shaft.Except stirring solid particle, the turn of pipeline is done can provide open pit shaft path continuously for the flowing of downhole well fluid.In a detailed description of the invention, pipeline steel pipe is formed.If pit shaft collapses suddenly or gets clogged, due to the pliability of steel pipeline, pipeline still can rotate.When pipe fitting rotates through obstruction, as time goes by, pipeline expands to original helical configuration and scans diameter, allows downhole well fluid to continue flowing thus.
Term " pipeline " does not also mean that restriction but can be appointed as the single component or multiple hollow or solid section that are formed by tubing or pipe.It is circular cross section substantially that pipeline can have, and maybe can comprise the cross section of any other shape.
With reference to Fig. 2 and 3, comprise for the system 200 of solid particle in the pit shaft 204 of control well 208 pump 212 being positioned at down-hole according to illustrative embodiment.First pipeline 216 extends from the ground surface 220 of well 208 and is operably connected to pump 212.In a detailed description of the invention, the first pipeline 216 comprises Offset portion 224, and in Offset portion 224, the longitudinal axis 228 of the first pipeline 216 offsets from the axis of rotation of the first pipeline 216, and the first pipeline 216 can rotate around axis of rotation.The axis of rotation of the first pipeline 216 in the un-offset portion 232 of the first pipeline 216 roughly corresponds to the longitudinal axis 228 in the un-offset portion 232 of the first pipeline 216.In a detailed description of the invention, the axis of rotation of Offset portion 224 roughly corresponds to the longitudinal axis of pit shaft 204.
Second pipeline 240 is operably connected to pump 212 and extends to down-hole from pump 212.In a detailed description of the invention, the second pipeline 240 comprises Offset portion 244, and in Offset portion 244, the longitudinal axis 248 of the second pipeline 240 offsets from the axis of rotation of the second pipeline 240, and described second pipeline 240 can rotate around described axis of rotation.In a detailed description of the invention, the axis of rotation of the second pipeline 240 in Offset portion 244 roughly corresponds to the longitudinal axis of pit shaft 204.
Pit shaft 204 can comprise roughly vertical portion 254 and approximate horizontal part 258.The Offset portion 224 of the first pipeline 216 and the Offset portion 244 of the second pipeline 240 are preferably roughly positioned in the approximate horizontal part 258 of pit shaft 204.Utilize the circulator 270 being positioned ground surface 220 to rotate these Offset portion 224,244 allow the circumference of Offset portion 224,244 " wiping " pit shaft 204 and stir the solid particle be deposited in the approximate horizontal part 258 of pit shaft 204.The stirring of this solid particle contributes to keeping solid particle to be entrained in the liquid of any gathering in pit shaft, prevents solid particle from blocking the entrance 274 of pump 212.In a detailed description of the invention, first pipeline and the second pipeline 216, the rotation of 240 can stop solid particle to precipitate in pit shaft 204 continuously, and in another embodiment, first pipeline and the second pipeline 216,240 only operate off and on and make to allow solid particle to be deposited in pit shaft 204 between twice operation of pump 212.Although the approximate horizontal part 258 with reference to pit shaft 204 describes wiping operation, it is to be appreciated that, the Offset portion 224 of the first pipeline and the second pipeline 216 and 204,244 in other parts location of pit shaft 204 and operation, can include but not limited to roughly vertical portion 244 or the curve 280 along pit shaft 204.Similarly, the Offset portion 224,244 of the first and second pipelines 216,204 may locating and operation with sleeve pipe or uncased length along pit shaft 204.
In a detailed description of the invention, the Offset portion 224,244 of the first and second pipelines 216,240 can be pre-formed with screw type conveyor screw.Scanning diameter outside screw type is spirochetal can be any size, reaches and comprises mineshaft diameter.In specifically implementing at one, the Offset portion 224,244 of the first and second pipelines 216,240 can be placed near pump 212 or with pump 212 and adjoin.Depend on embody rule, Offset portion can be configured in the discharge side of pump 212, suction side or its both sides.If Offset portion is spiral, screw type conveyor screw can be to anticlockwise or dextrorotary.Preferably, the spirochetal direction of screw type for the particular offset part of pipeline mates to provide the spiral swept to the entrance 274 of pump 212 by solid particle to push behavior with the direction of rotation of pipeline.
In another embodiment, Offset portion 224,244 can be waveform, and each longitudinal axis of such Offset portion is general plane.In waveform or helical configuration, each Offset portion comprise roughly nonlinear and roughly from Offset portion can around rotate axis variation longitudinal axis.
As shown in Figure 2, the rotation of the first pipeline and the second pipeline 216,240 also causes the in rotary moving of the pump 212 in pit shaft.When the rotation of the first pipeline and the second pipeline 216,240 stops, pump 212 may rest in the many different position of pit shaft 204 any one.In many cases, pump 212 is preferably placed at the lower position (as shown by the solid line in the drawings) of the approximate horizontal part 258 relative with higher position (as shown in phantom in FIG.), because the lower position that pump 212 is positioned pit shaft 204 allows to remove more liquid.
Shown in figure 4, comprise for the system 400 of solid particle in the pit shaft 404 of control well 408 pump 412 being positioned at down-hole according to exemplary detailed description of the invention.First pipeline 416 extends from the ground surface 420 of well 408 and is operably connected to pump 412.In the detailed description of the invention shown in Fig. 4, the first pipeline 416 does not comprise Offset portion.
Second pipeline 440 is operably connected pump 412 and extending to down-hole from pump 412.In a detailed description of the invention, the second pipeline 440 comprises Offset portion 444, and in Offset portion 444, the longitudinal axis 448 of the second pipeline 440 offsets from the pipeline axis of rotation of the second pipeline 440, and the second pipeline 440 can rotate around pipeline axis of rotation.The axis of rotation of the second pipeline 440 in Offset portion 444 roughly corresponds to the longitudinal axis of pit shaft 404.
Be similar to the well 208 of Fig. 2 and 3, pit shaft 404 can comprise roughly vertical portion 454 and approximate horizontal part 458.The Offset portion 444 of pump 412 and the second pipeline 440 is preferably roughly arranged in the approximate horizontal part 458 of pit shaft 404.The wiping action of Offset portion 444 is similar to reference to described by figure 2 and 3, and the first and second pipelines are rotated by the circulator 470 being positioned at ground surface 420.
In a detailed description of the invention, expect that the Offset portion 444 of the second pipeline 440 is only carried out briefly and rotates off and between pumping circulation.Because pump 412 can be adjacent to Offset portion 444 or near Offset portion 444, pump 412 runs into and previously described identical orientation problem.When the rotation of the first and second pipelines 416,440 stops, pump 412 may rest in the place in many diverse locations of pit shaft 404.In many cases, pump 412 is preferably placed at the lower position (as shown in Figure 4) relative with higher position of approximate horizontal part 458, because the lower position that pump 412 is positioned pit shaft 404 allows to remove more liquid.Clinometer 475 can operationally associate to provide pump indicating around the position in the annular path of pit shaft circumference with the first pipeline 416 or pump 412.Clinometer 475 can be electrically connected to the control system 477 being positioned at ground surface 420 or down-hole, and control system 477 can communicate the pump 412 of selectively locating in pit shaft 404 with the motor 479 of turning rotator 470.
With reference to figure 5, comprise for the system 500 of solid particle in the pit shaft 504 of control well 508 pump 512 being positioned at down-hole according to exemplary detailed description of the invention.First pipeline 516 extends from the ground 520 of well 508 and is operably connected to pump 512.Second pipeline 540 is operably connected to pump 512 and comprises the Offset portion being similar to those Offset portion aforesaid.
Pump 512 is electric submersible pumps.Circulator 570 is positioned at ground surface 520 to rotate the first and second pipeline 516,540 and pumps 512.The control unit 590 with timer communicates with the motor 591 being operably connected to circulator 570.Control unit 590 is also communicated with pump 512 by pump cable 592 or other communication lines.When although pump cable 592 can be positioned at the outside of the first pipeline 516, in the detailed description of the invention shown in Fig. 5, pump cable 592 is positioned at the first pipeline 516 to prevent pump cable from wearing and tearing or to damage.Pump cable 592 can use similar previously described method and system to be transported to down-hole.
With reference to figure 6A-6E, provide the cable induction system 608 according to exemplary detailed description of the invention, for cable 612 being transported to the underground equipment at down well placement 614 place be positioned in the pit shaft 616 of well 618.In the detailed description of the invention illustrated in Fig. 6 A-6E, underground equipment is pump 620, and cable 612 is the cables providing electric power to pump 620.The conveying of cable 612 to occur in after pump 620 enters in well 616 and pipeline 624 a terminal fluid be connected to pump 620 time.After having installed pipeline 624 and pump 620, cable 612 has been installed in pipeline 624, and this will be discussed in more detail below.Installation and the process that removes of pump enormously simplify by carrying cable 612 by this way, because the time-consuming process of processing pipeline and cable 612 eliminates simultaneously.In addition, by being arranged in pipeline 624 by cable 612, cable 612 is protected in order to avoid damage.
Cable induction system 608 comprises connector 628 and receiver 632.More specifically with reference to figure 6B, connector 628 comprises and is suitable for the plug casing 640 be assemblied in pipeline 624 connector 628 can be vertically moved in pipeline 624.Plug casing 640 comprises the ways 644 being connected to strain relief member 648.Ways 644 can be general cylindrical shape shape and in size the internal diameter of tight fit pipeline 624.The outer ground surface of ways 644 can be made up of elastomeric material and can comprise ripple, undulation, or other similar surfaces are brokenly to provide the contact point 652 with pipeline 624.A large amount of contact points 652 guarantees that plug casing 640 limit fluid can flow through plug casing 640 fully, but makes the surface area contacting pipeline 624 minimum, which improves the ability that plug casing 640 slides in pipeline 624.
Strain relief member 648 comprises the cable channel 654 for receiving cable 612.Can use one or more bolt 656, screw or other securing members are to be fastened to cable in strain relief member 648.In the detailed description of the invention shown in Fig. 6 B, cable 612 is bifilar cable and comprises the electric wire 658 insulated individually for a pair.Every wire 658 is by outlet opening 660 and be secured to power lug 662.Each power lug 662 is electrically connected to electric conductor 664.
Connector 628 comprises the passage 668 allowing fluid to flow through plug casing 640.Passage 668 extends through ways 644 and strain relief member 648.Such as valve 670 that is unidirectional or flap valve is operationally associated with passage 668 with limit fluid to downhole to flowing through passage 648 and allowing fluid to flow through passage 668 to aboveground direction.Valve 670 comprises valve seat 672 and valve body 674.Valve body comprises central area 676, upper shoulder region 678 and lower shoulder region 680.Central area 676 can be general cylindrical shape and be received slidably by valve seat 672.Valve passage 684 runs through the upper shoulder region 678 of 674 of valve body, central area 676 and lower shoulder region 680.Multiple mouth 686 is arranged in valve central area 676 to be communicated with valve passage 684.
The lengthwise movement of valve body 674 in valve seat 672 is subject to the restriction of takeing on region 678 and lower shoulder region 680.Valve body 674 can (see accompanying drawing 6B) slip between open position (illustration) and fastening position in valve seat 672.Fastening position is reached when there is pressure higher than the downhole fluid of connector 628 of pressure that the aboveground fluid of connector 628 has.In fastening position, multiple mouth 686 aligns with valve seat 672, and it stops aboveground fluid flows through passageway 668 and the valve passage 684 of connector 628.
For the ease of removing cable 612 and connector 628 in well, pressure-relief device 690 is arranged in the valve passage 684 in the upper shoulder region 678 of valve body 674.In the detailed description of the invention shown in Fig. 6 B, pressure-relief device 690 is the rupture disks being configured to lose efficacy when predetermined pressure difference.When the pressure of the aboveground fluid of connector 628 is less than the setting pressure of pressure-relief device 690, prevention fluid flows through the valve passage 684 near shoulder region 678.In this case, when only having valve body 674 to move to open position, fluid just can flow through valve passage 684.But when the setting pressure of the pressure overpressure safety device 690 of the aboveground fluid of connector 628, rupture disk will break, fluid will therefore be allowed to flow through valve passage 684, even if valve body 674 is in the closed position.
It is important to note that, safety device 690 can be more traditional, can reusable safety valve.Safety valve operationally can associate with valve body 674 or plug casing 640, allows fluid flows through passageway 668 when equaling or exceeding the setting pressure of pressure-relief device with the pressure of the aboveground fluid of convenient connector 628.
More specifically with reference to the connector 700 of figure 6C, Fig. 6 C exemplified with another detailed description of the invention, it comprise those with reference to connectors 628 discuss be similar to parts.Identical Reference numeral illustrated in Fig. 6 B is used for similar parts are described.The main distinction between connector 700 and connector 628 is that connector 700 comprises sphere 704 and valve seat 672 is arranged.Fluid flows through passageway 668 is moved into by sphere 704 and contact valve seat 672 to control with contacting of valve seat 672 with shifting out and removing.Another difference about connector 700 there is not pressure-relief device; But, it should be noted that be similar to above-described safety valve can with plug casing 640 conbined usage.
More specifically with reference to figure 6D, receiver 632 is positioned at the down well placement 614 of well.Although down well placement 614 illustrated in Fig. 6 D is positioned at the horizontal component of well 618, the position of down well placement 614 and thus pump 620 and receiver 632 is alternately positioned at the vertical component of well 618.Receiver 632 comprises can receiver shell 740 between pipeline 624 and pump 620.In the detailed description of the invention illustrated in Fig. 6 D, receiver 632 is connected to pipeline 624 by connector 742.Receiver 632 threadably (threadingly) can be connected to pump 620.
Receiver shell 740 comprises for receiving the cable channel 754 with the electric jumper 755 of pump 620 electric connection.Be similar to cable 612, jumper 755 is paired cable and comprises the electric wire 758 insulated separately for a pair.The respective terminating of electric wire 758 is at electric conductor 764 place.
Receiver 632 comprises path 768 and is communicated with to allow fluid between pipeline 624 and pump 620.Valve 770 and the path 768 of such as one way valve or flap valve operationally associate with limit fluid to downhole to flowing through path 768 and allowing fluid to flow through path 768 to aboveground direction.Valve 770 comprises valve seat 772 and valve body 774.It is moved into by valve body 774 and contact valve seat 772 or shift out and remove to control with the contact of valve seat 772 that fluid flows through path 768.Valve body 774 can be the spherical shape of cardinal principle as shown in Figure 6 D, or can be to be applicable to other shapes any with valve base sealing.
Valve body 774 can move between open position (illustration) and fastening position (see Fig. 6 D).Fastening position is arrived when the pressure occurring that the aboveground fluid of receiver 632 has is greater than the pressure of the downhole fluid of receiver 632.When the pressure of the downhole fluid of receiver 632 exceedes the pressure of aboveground fluid of receiver 632, valve body 774 moves to open position.In the open position, fluid can be communicated with between pump 620 and pipeline 624, and the fluid thus for being discharged by pump 620 provides path.
Receiver safety valve 790 operationally associates with receiver shell 740, allows passage 768 and be formed at fluid between the annular space 769 between pipeline 724 and pit shaft 616 to be communicated with when reaching with the fluid pressure in convenient passage 768 or exceed the setting pressure of receiver safety valve 790.When the fluid pressure in passage 768 is less than the setting pressure of receiver safety valve 790, receiver safety valve 790 will stop fluid between passage 768 and annular space 769 to be communicated with.
Still with reference to figure 6A-6E, when operating, cable 612 is by installing connector 628 and cable 612 " pumping " to pipeline 624 times.More specifically, pressure fluid by after plug casing 640 or the aboveground pump 795 of plug body 640 introduce to promote plug casing 640 times to pipeline 624.This power is provided to be required when connector 628 must navigate on the not vertical part of well 618 to connector 628.Cable 612 can be supplied to well 618 by the bobbin 665 and pulley system 667 being positioned at the ground surface of well 618 (see Fig. 6 A).
Before connector 628 being pumped into well 628 times, pipeline 624 can be full of fluid to control the decline of connector 628 and cable 612.The setting pressure of receiver safety valve 790 adds the dead weight of the cable promoting connector 628 even as big as the weight supporting the whole fluid column extended to the pipeline 624 of receiver 632 from the ground surface of well 618.
After fluid is full of pipeline 624, connector 628 can be inserted into the pipeline 624 at the ground surface place being arranged in well 618 and fluid pressure action to connector 628 below with pumping connector 628.At the aboveground of connector or the fluid pressure below between applying fluid pressure increase connector and receiver, thus exceed the setting pressure point of receiver safety valve 790 and open receiver safety valve 790.Along with opening of receiver safety valve 790, the fluid between connector 628 and receiver 632 is arranged into annular space 769 from pipeline 624.Preferably, the fluid in pipeline is incompressible, such as water, and this incompressible fluid allows connector 628 controllably to drop to receiver 632 by the release of receiver safety valve 790.
When connector 628 arrives down well placement 614 and receiver 632, the fluid built up in the aboveground pipeline 624 of connector 628 (that is, the fluid in being pumped into after connector 628 pipeline 624 by pump 795) promotes connector 628 makes it engage with receiver 632.Joint between connector 628 and receiver 632 makes electric conductor 664 and electric conductor 764 closely cooperate.Dismountable locking mechanism can be used to keep engaging during pump work.Electric conductor 664, the contact between 764 allows electric connection, thus cable 612 is attached to pump 620.Along with the conveying of cable 612, cable 612 can be connected to the power supply (in figure not display) of the ground surface of well 618 to provide electric power to pump.
When the pump is operated, the fluid of discharging from pump 620 makes valve body 774 and valve body 674 move to open position, and this allows the fluid of discharging to flow through pipeline 768, and pipeline 668 and pipeline 624 arrive the ground surface of well 618.When pump 620 quits work, the fluid in any pipeline 624 be gathered in above connector 628 and receiver 632 is by moving to the valve body 674 of fastening position to stop backflow.
In deep-well, by pulling cable to make connector 628 and receiver 632 depart from simply, this is if not impossible, is also very difficult.If the fluid column above connector 628 applies enough power to connector 628, this power can exceed the intensity of cable.In this case, before receiver 632 and connector 628 depart from, the aboveground fluid of connector 628 can drain from pipeline.In a detailed description of the invention, the fluid of such as water is pumped into and causes rupture disk 690 to lose efficacy when pipeline 624 pulls out with convenient cable 612 and connector 628 from well 618 and allow the fluid dammed above connector 628 to flow through connector.In another detailed description of the invention, the low density flow of such as air is pumped to pipeline, and the dense fluids got lodged in above connector is shifted by safety device 690 and receiver safety valve 790.
Although illustrative detailed description of the invention is mainly pointed to and power cable is flowed to electric submersible pump in Fig. 6 A-6E, the system and method for cable conveying as described herein can be applied to power cable, data transfer cable, fiber optics cable or other any cables for down-hole.If use fiber optics cable, the electric conductor being provided with connector and receiver can be replaced with the suitable parts being used to compare favourably with fiber cable joint.Similarly, the underground equipment that cable is transported to not only is confined to electric submersible pump.Other equipment can comprise wired logging equipment, sensor array, drill motor, or need to transmit electric power in subsurface environment or other any equipment of data.
With reference to figure 7 and 8, comprise for the system 800 of solid particle in the pit shaft 804 of control well 808 pump 812 being positioned at down-hole according to exemplary detailed description of the invention.First pipeline 816 extends from the ground surface 820 of well 808 and is operably connected to pump 812.Second pipeline 840 is operably connected to pump 812 and comprises the Offset portion 844 being similar to aforementioned Offset portion.
Pump 812 is the cavity pumps comprising rotor 847, and rotor 847 can rotate to remove liquid from pit shaft 804 in stator 849.The energy rotating the Offset portion 844 of the second pipeline 840 is provided by rotor 847, and rotor 847 is operably connected to via the first pipeline 816 CD-ROM drive motor being positioned at ground surface 820.Rotor 847 is axially movable between disengaging configuration (as shown in Figure 8) and bonding station.In the detailed description of the invention shown in Fig. 8, rotor 847 is operationally associated with drive rod 853, and drive rod 853 moves axially together with rotor 847.When bonding station inserted by rotor 847, drive rod 853 receives by with the receiver 855 that the second pipeline 840 operationally associates.Drive rod 853 and receiver 855 are that key coordinates or comprises matching spline or other features, allow rotary motion to be transferred to another from drive rod 853 and receiver 855 to be received at drive rod 853 when device 855 receives.Although drive rod 853 is in fig. 8 exemplified with being operationally associated with rotor 847 and receiver 855 associates with the second pipeline 840, but in another detailed description of the invention, receiver 855 can operationally associate with rotor 847 and drive rod 853 associates with the second pipeline 840.
Drive rod 853 and the selective joint of receiver 855, and therefore the second pipeline 840 selective rotation by ground surface 820 and the hydraulic elevator 861 being configured to movable rotor 847 between bonding station and disengaging configuration provide.When expectation second pipeline 840 stirs, the first pipeline 816 transferred by hydraulic elevator 861, and rotor 847 is moved to bonding station from disengaging configuration by this.Then the rotation of rotor 847 is transferred to the second pipeline 840 to stir the solid particle in pit shaft 804 by drive rod 853 and receiver 855.When the stirring cycle completes, hydraulic elevator 861 rises, and makes drive rod 853 depart from from receiver 855 and allow cavity pump 812 normally to work.For the stirring part in pump cycle, the rotary speed of cavity pump 812 can low-speed running between 5% to 50% of permanent speed.Another detailed description of the invention supposes that the second pipeline 840 stirs continuously, instead of selective joint.If desired, single or multiple planetary gear reduction unit can be positioned to reduce rotating speed further and to increase moment of torsion between rotor 847 and the second pipeline 840, as optionally or continuous print pump and pipe fitting stir desired by.
Clearly can know from foregoing description and the invention provides huge advantage.And the present invention illustrate only several forms wherein, be not limited to this several form but be easy to carry out various changes and amendment on the basis not departing from spirit of the present invention.
Claims (31)
1., for providing a cable induction system for electric power to the down well placement in well, described system comprises:
Be positioned the pump in well;
The pipeline be communicated with described pump fluid, to receive the liquid of discharging from described pump;
Be configured to the cable be communicated with power supply;
Connector, it has at least one electric conductor with cable electric connection, and described connector has and is suitable for being assembled to the plug body in described pipeline, and described plug body has passage and flows through plug body to allow fluid;
Flap valve, itself and the passage of described plug body operationally associate with limit fluid along downhole to flowing through described passage and allowing fluid to flow through described passage along aboveground direction; And
Be positioned at the receiver of described down well placement, described receiver has receiver shell and at least one electric conductor with described pump electric connection, when described receiver shell and plug body engage, at least one electric conductor of described receiver is suitable at least one the electric conductor electric connection with described connector, and described receiver shell has the passage be communicated with pump fluid with described pipeline.
2. system according to claim 1, is characterized in that, described down well placement is arranged in the horizontal component of described well.
3. according to the system described in claim 1, it is characterized in that, described connector and cable are pushed to described down well placement by the aboveground compressed fluid introducing described connector.
4. system according to claim 1, is characterized in that, described system also comprises:
Safety valve, it operationally associates with described receiver, controls the decline of described connector when being transferred in described well by described pipeline with the described connector of box lunch.
5. system according to claim 1, is characterized in that, described system also comprises:
Be positioned the brakes of the ground surface of described well, when transferring in described pipeline with the described connector of box lunch, control the advance of the cable entered in described pipeline.
6. system according to claim 1, is characterized in that, described system also comprises:
Pressure-relief device, it is operationally associated with at least one in described flap valve and plug body, allows fluid to flow through described plug body when exceeding the setting pressure of described pressure-relief device with the fluid pressure in the aboveground pipeline of the described connector of box lunch.
7. system according to claim 6, is characterized in that, described pressure-relief device is rupture disk.
8. system according to claim 1, is characterized in that, described system also comprises:
Second flap valve, it is operationally associated with the passage of described receiver shell, with limit fluid along downhole to flowing through described passage and allowing fluid to flow through described passage along aboveground direction; And
Receiver safety valve, it is operationally associated with one in described receiver shell and pipeline, and fluid between described pipeline with the annular space be formed between described pipeline and pit shaft can be allowed to be communicated with.
9. system according to claim 8, is characterized in that,
When described receiver shell and plug body engage, the described second and first flap valve can be flow through by the fluid of described pump pumping and be arrived the ground surface of described well by described pipeline.
10. system according to claim 1, is characterized in that, described system also comprises:
Pressure-relief device, it is operationally associated with at least one in described flap valve and plug body, allows fluid to flow through described plug body when exceeding the setting pressure of described pressure-relief device with the fluid pressure in the aboveground pipeline of the described connector of box lunch;
Second flap valve, its passage being operationally associated with described receiver shell with limit fluid along downhole to flowing through described passage and allowing fluid to flow through described passage along aboveground direction; And
Receiver safety valve, it is operationally associated with one in described receiver shell and pipeline, and can allow described pipeline and be formed at fluid between the annular space between pipeline and pit shaft to be communicated with.
11. systems according to claim 10, it is characterized in that, described receiver safety valve is positioned the aboveground of described second flap valve and fluid between the passage of described receiver shell and annular space can be allowed when the fluid pressure in described receiver channel reaches or exceed the setting pressure of described receiver safety valve to be communicated with.
12. systems according to claim 10, is characterized in that, described system also comprises:
The compressed gas source be communicated with described pipeline, makes Compressed Gas can be injected in described pipeline so that described connector departs from from described receiver.
13. systems according to claim 10, is characterized in that,
At described connector before the ground surface place of well is introduced into described pipeline, when described connector is transferred in described well by described pipeline, fluid is introduced in described pipeline to control the decline of described connector;
Described connector and cable are pushed to described down well placement by the aboveground pressure fluid introducing described connector;
When described connector is pushed to described down well placement, the downhole fluid of described connector exceedes the setting pressure of described receiver safety valve and enters described annular space from the discharge of receiver safety valve;
When described receiver shell and plug body engage, the described second and first flap valve can be flow through by the fluid of described pump pumping, flow through the ground surface that described pipeline arrives described well; And
Before described receiver shell and plug body depart from, fluid pressure in the aboveground pipeline of described connector increases to above the setting pressure of described pressure-relief device and the setting pressure of described receiver safety valve, allows the fluid in described pipeline to be pulled in described annular space thus.
14. 1 kinds for cable being transported to by pipeline the system of the down well placement in well, described system comprises:
Connector, it has the first connector being configured to be operably connected to described cable, and described connector has and is suitable for being assembled to the plug body in described pipeline, and described plug body has passage and flows through described plug body to allow fluid;
Flap valve, it operationally associates with the passage of described plug body, with limit fluid along downhole to flowing through passage and allowing fluid to flow through described passage along aboveground direction; And
Receiver, it is configured to be positioned described down well placement, described receiver has receiver shell and the second connector, described second connector structure becomes to be operably connected to underground equipment, when described receiver shell and plug body engage, the second connector of described receiver is suitable for being communicated with the first connector of described connector.
15. systems according to claim 14, is characterized in that, described receiver shell comprises the passage allowing fluid connection between described pipeline and the down well placement of described receiver shell.
16. systems according to claim 14, is characterized in that, described underground equipment is the cable that electrodynamic pump and described cable are used to provide electric power to described pump.
17. systems according to claim 14, is characterized in that, described underground equipment is wired well logging unit.
18. systems according to claim 14, is characterized in that,
Described cable is Connectorized fiber optic cabling; And
Described first connector and the second connector in conjunction with time form joint for described Connectorized fiber optic cabling.
19. systems according to claim 14, is characterized in that, described cable is data conveying cable.
20. systems according to claim 14, is characterized in that, described down well placement is positioned at the horizontal component of described well.
21. systems according to claim 14, is characterized in that, described system also comprises:
Brakes, it is positioned the ground surface of described well, controls to enter the cable of described pipeline and the advance of connector when transferring enter pipeline with the described connector of box lunch.
22. systems according to claim 14, is characterized in that, described system also comprises:
Pressure-relief device, it is operationally associated with at least one in described flap valve and plug body, allows fluid to flow through described plug body when exceeding the setting pressure of described pressure-relief device with the fluid pressure in the aboveground pipeline of the described connector of box lunch.
23. systems according to claim 22, is characterized in that, described pressure-relief device is rupture disk.
24. systems according to claim 15, is characterized in that, described system also comprises:
Second flap valve, it is operationally associated with described receiver shell, so that limit fluid is along downhole to flowing through described passage and allowing fluid to flow along aboveground direction through described passage; With
Receiver safety valve, it is operationally associated with one in described receiver shell and pipeline, and fluid between described pipeline and the annular space being formed between pipeline and pit shaft can be allowed to be communicated with.
25. systems according to claim 15, is characterized in that, described system also comprises:
Pressure-relief device, it is operationally associated with at least one in described flap valve and plug body, allows fluid to flow through described plug body when exceeding the setting pressure of described pressure-relief device with the fluid pressure in the aboveground pipeline of the described connector of box lunch;
Second flap valve, its be operationally associated with described receiver shell in case limit fluid through described passage along downhole to flowing and allow fluid to flow along aboveground direction through described passage; With
Receiver safety valve, it is operationally associated with one in described receiver shell and pipeline, and fluid between described pipeline and the annular space being formed between pipeline and pit shaft can be allowed to be communicated with.
26. 1 kinds for being transported to the method for the down well placement in well by cable by pipeline:
Arrange receiver in described down well placement, described receiver has the electric conductor be communicated with underground equipment;
Be positioned at by connector in described pipeline, described connector has the electric conductor that is communicated with cable and is connected to described cable so that described electric conductor is connected with described cable;
By described connector being transported to described down well placement in the aboveground pipeline of fluid pump being sent into described connector;
Before the described connector of conveying, fluid is incorporated in the downhole pipeline of described connector;
Engaging described connector makes the electric conductor of described connector be communicated with the electric conductor of receiver with receiver; And
By cable, electric power is transported to described underground equipment from the ground surface of described well.
27. methods according to claim 26, is characterized in that, described connector is transported to described down well placement and also comprises:
By being positioned down-hole and the fluid in the pipeline between described connector and receiver removes by the safety valve be communicated with described pipeline.
28. methods according to claim 26, is characterized in that, described connector is transported to described down well placement and also comprises:
Substantially the restrictive pump fluid sent in the aboveground pipeline of described connector flows through described connector.
29. methods according to claim 26, is characterized in that, described underground equipment is pump.
30. methods according to claim 29, is characterized in that, described method also comprises:
Allow flow through described receiver and connector by the fluid of pump pumping and arrived the ground surface of well by described pipeline.
31. methods according to claim 26, is characterized in that, described method also comprises:
Before described connector departs from receiver, the fluid pressure increased in the aboveground pipeline of described connector makes fluid by discharging from described pipeline with the safety valve that described connector associates with at least one in receiver.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/245,651 | 2008-10-03 | ||
| US12/245,660 | 2008-10-03 | ||
| US12/245,651 US7832468B2 (en) | 2007-10-03 | 2008-10-03 | System and method for controlling solids in a down-hole fluid pumping system |
| US12/245,660 US7770656B2 (en) | 2007-10-03 | 2008-10-03 | System and method for delivering a cable downhole in a well |
| PCT/US2008/013485 WO2010039113A1 (en) | 2007-10-03 | 2008-12-08 | System and method for delivering a cable downhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102264995A CN102264995A (en) | 2011-11-30 |
| CN102264995B true CN102264995B (en) | 2015-04-22 |
Family
ID=43881639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880132211.3A Expired - Fee Related CN102264995B (en) | 2008-10-03 | 2008-12-08 | System and method for delivering a cable downhole |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102264995B (en) |
| AU (1) | AU2008362504A1 (en) |
| CA (1) | CA2739413A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670312B (en) * | 2013-11-27 | 2016-09-07 | 江汉石油钻头股份有限公司 | Have the underwater steel wire rope work tool transferring and reclaiming function concurrently |
| US10837267B2 (en) * | 2016-11-29 | 2020-11-17 | Saudi Arabian Oil Company | Well kickoff systems and methods |
| CN111395973A (en) * | 2020-04-16 | 2020-07-10 | 中国石油天然气集团有限公司 | Liquid-phase-free drilling system for loess layer and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5285204A (en) * | 1992-07-23 | 1994-02-08 | Conoco Inc. | Coil tubing string and downhole generator |
| US5518073A (en) * | 1994-05-05 | 1996-05-21 | Halliburton Company | Mechanical lockout for pressure responsive downhole tool |
| US6142237A (en) * | 1998-09-21 | 2000-11-07 | Camco International, Inc. | Method for coupling and release of submergible equipment |
| US6497281B2 (en) * | 2000-07-24 | 2002-12-24 | Roy R. Vann | Cable actuated downhole smart pump |
| CN1708631A (en) * | 2002-09-23 | 2005-12-14 | 哈利伯顿能源服务公司 | Annular isolators for expandable tubulars in wellbores |
-
2008
- 2008-12-08 CA CA2739413A patent/CA2739413A1/en not_active Abandoned
- 2008-12-08 CN CN200880132211.3A patent/CN102264995B/en not_active Expired - Fee Related
- 2008-12-08 AU AU2008362504A patent/AU2008362504A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5285204A (en) * | 1992-07-23 | 1994-02-08 | Conoco Inc. | Coil tubing string and downhole generator |
| US5518073A (en) * | 1994-05-05 | 1996-05-21 | Halliburton Company | Mechanical lockout for pressure responsive downhole tool |
| US6142237A (en) * | 1998-09-21 | 2000-11-07 | Camco International, Inc. | Method for coupling and release of submergible equipment |
| US6497281B2 (en) * | 2000-07-24 | 2002-12-24 | Roy R. Vann | Cable actuated downhole smart pump |
| CN1708631A (en) * | 2002-09-23 | 2005-12-14 | 哈利伯顿能源服务公司 | Annular isolators for expandable tubulars in wellbores |
| US7216706B2 (en) * | 2002-09-23 | 2007-05-15 | Halliburton Energy Services, Inc. | Annular isolators for tubulars in wellbores |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008362504A1 (en) | 2010-04-08 |
| CA2739413A1 (en) | 2010-04-08 |
| CN102264995A (en) | 2011-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7832468B2 (en) | System and method for controlling solids in a down-hole fluid pumping system | |
| AU2010236946B2 (en) | Slickline conveyed debris management system | |
| AU2010236947B2 (en) | Slickline conveyed tubular cutter system | |
| AU2010236955B2 (en) | Slickline conveyed shifting tool system | |
| AU2010236945B2 (en) | Slickline conveyed tubular scraper system | |
| US6092600A (en) | Dual injection and lifting system using a rod driven progressive cavity pump and an electrical submersible pump and associate a method | |
| US8316938B2 (en) | Subterranean water production, transfer and injection method and apparatus | |
| US6079491A (en) | Dual injection and lifting system using a rod driven progressive cavity pump and an electrical submersible progressive cavity pump | |
| US6092599A (en) | Downhole oil and water separation system and method | |
| MX2014000947A (en) | System and method for production of reservoir fluids. | |
| CN103975117A (en) | Improved wireline drilling system | |
| US8276673B2 (en) | Gas lift system | |
| US6123149A (en) | Dual injection and lifting system using an electrical submersible progressive cavity pump and an electrical submersible pump | |
| CN103534434A (en) | Submersible progressive cavity pump driver | |
| CN103180544B (en) | The selective manifold post controlling the streaming flow stream of friction speed in the drilling well from single main borehole | |
| CN102264995B (en) | System and method for delivering a cable downhole | |
| EA036165B1 (en) | Distributed lift system for oil and gas extraction | |
| CA2922565A1 (en) | Flexible electrical submersible pump and pump assembly | |
| WO2016040220A1 (en) | Bottom hole injection with pump | |
| WO2010016767A2 (en) | Subsurface reservoir drainage system | |
| CN103221633B (en) | The flexible duct being used for fluid extraction is used to carry out the man-made system producing and safeguarding while machinery pumping | |
| CN202866764U (en) | Combination pump deep pumping device | |
| MX2011004687A (en) | Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well. | |
| US10619463B2 (en) | Apparatus and method for improving an electric submersible pump system | |
| CA2240990A1 (en) | Dual inlet and lifting system using progressing cavity pumps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20201208 |