CN101365863B - Pressure containment methods of shaft - Google Patents
Pressure containment methods of shaft Download PDFInfo
- Publication number
- CN101365863B CN101365863B CN200780001974.XA CN200780001974A CN101365863B CN 101365863 B CN101365863 B CN 101365863B CN 200780001974 A CN200780001974 A CN 200780001974A CN 101365863 B CN101365863 B CN 101365863B
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- coil pipe
- pressure
- removable
- cup
- containment devices
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
Moveable and split packer cups for use above a conventional coiled tubing fracturing or stimulation tool are described as well as methods for running these tools into a wellbore. These devices can be used for extended stimulation intervals with coiled tubing, as well as for a secondary pressure containment to avoid pressure communication with uphole formations or perforations.
Description
The cross reference of related application
The application's case is advocated the priority of the 2nd, 532, No. 295 of applying on January 6th, 2006 and the 2nd, 552, No. 072 Canadian patent application case of applying on July 14th, 2006.
Technical field
The present invention relates to use the coil pipe fracturing or stimulate subterranean strata in order to improve the gentle production of oil, and more particularly, relate to pressure containment devices.
Background technology
Fracturing or stimulate subterranean strata to increase the gentle production of oil to have become routine operation in the petroleum industry.In fracturing, fracturing fluid is expelled in the rock stratum by pit shaft with the pressure and the flow velocity that are enough to overcome overburden stress and make the rock stratum begin to break.Fracturing fluid can be based on the liquid of water, based on the liquid of oil, for example liquid gas, the dry gas of (but being not limited to) nitrogen for example of (but being not limited to) carbon dioxide, or the combination of liquid gas and dry gas, the perhaps a certain combination of any one in these or other fluid.Modal is that proppant is introduced in the fracturing fluid, and the effect of described proppant is to prevent that the crack closure when earth pressure release that produces from getting back to former state.Be suspended in proppant in the fracturing fluid and send it in the crack.Proppant in the use comprises sand, pottery and other material of 20 to 40 size of meshes, and described material provides permeability channel to allow oil or gas to flow to pit shaft with larger stream from the rock stratum in the crack.
Stimulating technology can comprise introduces acid with dissolving rock stratum or drilling well pollutant, or introduces solvent fluid removing the accumulation of paraffin or wax, or other this type of technology.
Can be by improve significantly the production of oil or natural gas with these technology.
Using the fracturing of coil pipe is common operation.It uses the bottom hole assemblies part of one or more pressure containment devices (for example fracture cups (fracture cap) or packer cup (packer cap)) that comprise relative group usually, and described pressure containment devices is fixed on the thick segment pipe of common wall ratio coil pipe string.Distance between two groups of relative fracture cups determine will be by cup being fixed to the bottom hole assemblies part length of the formation interval of pressure break.In the operation of this type, the length at interval that generally will pressure break is subject to the distance limit between the fracture cups, and the distance between the fracture cups itself can be subject to lubricating coupler length and/or crane height restriction.
In typical operation, need to make well maintain live conditions, this means that to make well stream when operating moving but water or heavier liquid do not destroy well.Under the situation of this type of live-well operation, coil pipe is regarded as having the significant advantage of the pipe operations that is better than engaging because when coil pipe being moved into and moves away well control surface pressure and after instrument is in the pit shaft, do not form joint on the string constantly.
In order to realize live-well operation, the instrument that is used for pressure break enters lubricatedly and leaves pit shaft, be attached to instrument on the coil pipe in described process and be housed within one section pressure integral type pipeline (being known as lubricating coupler) and be attached to the pit shaft of coil pipe preventer (BOP) top, described coil pipe preventer itself is attached to the so-called pressure-control valve of main valve that is.After the lubricating coupler that will accommodate coil pipe fracturing tool and coil pipe is connected to main valve, lubricator system is tested to guarantee its holds wellbore pressure and do not leaked.Then suppress the well pressure by the coil pipe stripping attachment or the stuffer box that are between lubricating coupler and the syringe.After setting up the pressure integrity of system by test, can open main valve and with fracturing tool and coil pipe be transported to reach in the pit shaft the degree of depth of wanting for fracturing operation, and under live conditions, carry out whole operation.
When carrying out these operations, commonly initial pressure break extends through one or more upper zone by the open perforations in the sleeve at the sleeve rear in one or more districts, has reduced whereby the efficient of current crack treatment and has also weakened potentially following crack treatment on one or more upper zone.
Summary of the invention
Therefore, in one aspect, the present invention relates to the method for the pressure restraining in a kind of pit shaft, it may further comprise the steps: coil pipe is provided; Provide movably pressure containment devices at pipe; To manage to insert and arrive first degree of depth in the pit shaft and simultaneously removable pressure containment devices is maintained the surface and make pipe by removable pressure containment devices; Removable pressure containment devices is fixed in the position on the pipe; And will manage and insert arrival second degree of depth in the pit shaft.Described method can further comprise the bottom hole assemblies part, and wherein with at least one the non-removable pressure containment devices that is fixed on the bottom hole assemblies part the first pressure containment devices is fixed on the bottom hole assemblies part.The bottom hole assemblies part can be fracturing tool.Removable pressure containment devices can comprise for removable pressure containment devices being fixed on pipe upper so that disapprove pipe by the locking piece of pressure containment devices when pipe is inserted when pit shaft arrives second degree of depth.Described method can be used for one-level, secondary and three stage pressures and suppresses.
On the other hand, the present invention relates to the method for the pressure restraining in a kind of pit shaft, it may further comprise the steps: coil pipe is provided; Coil pipe is transported to arrival first degree of depth in the pit shaft; Pressure containment devices is attached on the ground pipe; And coil pipe is transported in the pit shaft arrives second degree of depth, and described method can comprise the bottom hole assemblies part that is connected to pipe.The bottom hole assemblies part can comprise at least one non-removable pressure containment devices.Device can be separate cup.
On the other hand, the present invention relates to the method for the pressure restraining in a kind of pit shaft, it may further comprise the steps: provide to have the first fixation pressure inhibition cup on coil pipe and the pipe; Provide removable pressure restraining cup at pipe; Pipe is transported in the pit shaft arrives first degree of depth and simultaneously removable pressure restraining cup is maintained the place, ground and make pipe by removable pressure cup; In removable glass of position that is fixed on the pipe; And pipe is transported in the pit shaft arrives second degree of depth.
Aspect another, the present invention relates to the method for the pressure restraining in a kind of pit shaft, it may further comprise the steps: provide to have the first fixation pressure inhibition cup on coil pipe and the pipe; Pipe is transported to arrival first degree of depth in the pit shaft; The pressure restraining member is provided and is fixed in the position of the non-pipe end on the pipe; And pipe is transported in the pit shaft arrives second degree of depth.
On the other hand, the present invention relates to a kind ofly for fluid restraining device fluid-encapsulated in pit shaft, it comprises: sleeve pipe, and it is used for being placed on coil pipe; And releasable locking component, it is used for device is locked in coil pipe, whereby when locking component is in non-locked position, can make coil pipe pass through device.Device can be packer cup or fracture cups.
On the other hand, the present invention relates to a kind of coil pipe composite member, it comprises coil pipe and the removable pressure restraining member on coil pipe.Composite member can comprise along the lower of removable inhibition member and suppress cup to first fixation pressure of eyelet on pipe.
On the other hand, the present invention relates to a kind of fluid for suppression fluid in pit shaft and suppress cup, it comprises two sleeve halves.
Description of drawings
Now referring to accompanying drawing the present invention is described in more detail hereinafter, explanation embodiments of the invention and wherein in the accompanying drawing:
Fig. 1 is the lateral view of prior art (routine) coil pipe fracturing tool:
Fig. 2 is the lateral view for the prior art equipment of conventional coil pipe fracturing operation;
Fig. 3 A is in the pressure break of using art methods or stimulates the schematic diagram that run through of fluid between the adjacent sets perforation;
Fig. 3 B is the schematic diagram of arranging according to removable or separate cup of the present invention;
Fig. 3 C is the lateral view for the explanation of the layout of the removable or separate cup of secondary inhibition;
Fig. 4 is the schematic diagram according to the use of the separation of the pressure break for the prolongation interval of the present invention or stimulation or removable cup;
Fig. 5 A is the partial cross section according to the embodiment of the removable cup composite member be used to being attached to a string coil pipe of the present invention;
Fig. 5 B is the lateral view of the removable cup of Fig. 5 A;
Fig. 6 A is the partial cross section according to removable cup composite member of the present invention;
Fig. 6 B is the exploded view of the removable cup composite member of Fig. 6 A;
Fig. 7 is for the lateral view of installation according to an embodiment of the equipment of removable cup composite member of the present invention;
Fig. 8 A is the phantom drawing according to separate cup design of the present invention;
Fig. 8 B is the enlarged drawing in cross section of composition surface of the separate cup of Fig. 8 A;
Fig. 9 A is the phantom drawing according to separate cup composite member of the present invention;
Fig. 9 B is the cross section of the composite member of Fig. 9 A; And
Figure 10 is for the lateral view of installing according to the equipment of separate cup composite member of the present invention.
The specific embodiment
The present invention among embodiment comes pressure break or stimulates the method for subterranean strata with the coil pipe with one group of relative pressure containment devices.These devices can be fracture cups or packer cup, inflatable packer elements, maybe will be suppressed at other such device of the introducing pressure between the pressure containment devices.The prior art utilization of coil pipe pressure break is fixed to one group of relative fracture cups or the packer cup of bottom hole assemblies part, and described bottom hole assemblies part is attached to a string coil pipe.Yet, in the present invention, one or more upper pressure restraining devices through design so that it can be placed on the well operation of still remaining stationary when allowing pressure break significantly than large-spacing of position on the coil pipe strategically.
The present invention among another embodiment is one group of relative fracture cups using when coming fracturing rock-layer underground with coil pipe.Comprise extra upper cup or the upper cup of additional set, it can be placed on position on the coil pipe strategically allowing having the pressure potential barrier in sleeve inner, to prevent and pressure communication from the one or more upward hole eyes district in the sleeve.
Separate cup design according to one embodiment of present invention can be used for suppressing with pressure break or the stimulus intervals that is used for prolonging or the secondary pressure that is used as in the situation about running through at the sleeve rear in pressure break or the stimulating course.
Such as conventional method, the coil pipe fracturing tool is connected to coil pipe and lubricated entering in the pit shaft.If the purpose of operation is pressure break or the stimulus intervals that prolongs, the coil pipe fracturing tool will be similar to conventional coil pipe fracturing tool and not have and be in the one or more upper cup that allow in injecting fluid and the position that the pit shaft of coil pipe fracturing tool over top is communicated with so.Suppress if the purpose of operation is secondary pressure, so such as conventional method, conventional coil pipe fracturing tool will keep upper cup.
Between coil pipe BOP and lubricating coupler, add the coil pipe operation window to the well head composite member.Operation window is the pressure integrated device, and it can be opened and close when main valve open and coil pipe be in pit shaft and allow near coil pipe.According to needed BOP configuration, when opening, window avoids standing the well pressure by ring bag and/or the pipe ram of closing coil pipe BOP.
Under live conditions, will the disposing of conventional coil pipe fracturing tool (having or do not have one or more upper cup) be transported to arrive in the pit shaft by the desired gap length of pressure break and determine or as the degree of depth determined by next group adjacent perforated.After arriving this degree of depth, start coil pipe BOP (ring bag and/or pipe ram) to suppress wellbore pressure, make the lubricator system decompression, and open operation window with near coil pipe.
In one embodiment of the invention, when coil pipe is exposed to atmosphere, a group or more separate cup is attached to coil pipe, and by a group or more maintenance or engagement member described separate cup is retained in the appropriate location.After separate cup composite member (its comprise cup and retaining member) is fixed to coil pipe, close operation window, System Testing Pressure, and open BOP with allow with coil pipe be transported to the degree of depth of being wanted for fracturing operation.
After finishing fracturing operation, coil pipe is pulled out from pit shaft, one or more upper cup are transported in the operation window and according to the opposite program that described cup is installed in program used on the coil pipe it are removed.
In according to another embodiment of the present invention, by being in the align member of BOP on stacking, with the solid one-piece upper pressure containment devices of for example fracture cups or packer cup be placed on the coil pipe string want in the position.Described align member can be one group of locator flashboard or C shape plate or other similar component that is in the window, is maintained one or more upper cup static when moving in the pit shaft when coil pipe.Described program also will need operation window to allow that one or more upper cup are fixed to the coil pipe string, so that surface equipment will be with above described identical for separate cup embodiment.
Before coil pipe was attached to the fracturing tool that carries bottom cup group or bottom cup, upper cup or the upper cup group that will have the retaining member that is associated were placed on coil pipe string top.After being put into top cup on the coil pipe, connect fracturing tool.Top cup manually is placed on the coil pipe of flashboard top, one group of location, described location flashboard just is in the below of operation window or is positioned in the operation window by plate, and through design take when being transported to coil pipe in the well with one or more top cup fixings as static.
Under live conditions, bottom cup or bottom cup group be transported to and arrive in the pit shaft by the desired gap length of pressure break or by the target perforation degree of depth definite with the interval between next adjacent perforated.After arriving this degree of depth, start coil pipe BOP (ring bag and/or pipe ram) to suppress wellbore pressure, make lubricator system decompression, and open operation window with near coil pipe with by one or more top cup of locating flashboard or location-plate and be retained on the surface.
By coil pipe is exposed to atmosphere, a group or more holding device is fixed on the coil pipe, so that with in the one or more glasss of appropriate locations that firmly are retained on the coil pipe.This retaining member can be to be positioned at solid mandrel device on the coil pipe with removable cup, to be bonded on separating clamp in the window, can be wound into the spiral holding unit on the coil pipe, or one or more cups are retained on another such devices in the appropriate location.
After being fixed to upper cup composite member (its comprise cup and retaining member) on the coil pipe, close operation window, System Testing Pressure is opened BOP, and open the location flashboard with allow with coil pipe and upper cup composite member be transported to the degree of depth of being wanted for fracturing operation.
After finishing pressure break or stimulation applications, coil pipe is pulled out from pit shaft, close the location flashboard so that one or more upper cup are transported in the operation window and according to the opposite program that described cup is installed in program used on the coil pipe it are removed.
Should be appreciated that, in a particular embodiment, basis of the present invention is to use adjustable depth or the process of pressure containment devices movably, and described pressure containment devices can be to be used for the pressure break of Adaptive change and extending length or fracture cups or other similar device of stimulus intervals on the coil pipe.Existence is incorporated into some modes in the pit shaft with the cup of the removable or adjustable depth on the coil pipe.Above describe some method and apparatus, but do not expected that the present invention is limited to these method and apparatus, and contained program and both versions of device.
In another embodiment, the present invention relates to a kind of comprise with at a high speed and the combination of high-pressure injection gas-pressurized, liquid, solid support agent material, acid or solvent or these materials in the rock stratum, to produce, to open and propagate the crack or to dissolve the method and system of the material in the rock stratum.Suppress injection pressure and material on the set rock stratum with coil pipe fracturing tool or similar device.The invention provides upper cup or cup group are positioned on the coil pipe strategically so that can carry out the fracturing operation of extending length or under the situation that secondary pressure suppresses the second upper cup or cup be organized the mode that is positioned at strategically on the coil pipe.Do not wish that the present invention is limited to embodiment disclosed herein.In particular, can modify process and device, it can be included in the coil pipe that uses between bottom fracture cups and the top fracture cups through special coating or processing and avoid wearing and tearing with the protection coil pipe, and comprises the alternative that one or more top cup is incorporated into coil pipe.
Referring to Fig. 1, conventional coil pipe fracturing tool mainly forms by bottom cup or cup group 101, injection port 102, upper cup or cup group 103 with the coiled tubing connector 104 that aforementioned composite member is connected to coil pipe 105.
Referring to Fig. 2, by conventional coil pipe fracturing tool 201 is housed within conventional coil pipe fracturing tool 201 is entered in the pit shaft 202 lubricatedly, described lubricating coupler 203 is connected to blowout prevention stacking 204.Should be clear, the gap length of pressure break or stimulation is subject to the height in hand restriction for the crane 205 that coil pipe syringe 206 is suspended at pit shaft 202 tops.
Fig. 3 A shows that pressure break or other stimulation cause the possibility that runs through between the adjacent sets perforation.Show conventional coil pipe fracturing tool in pit shaft 301, it has bottom cup or cup group 302 and upper cup or cup group 303.Can be incorporated into including (but not limited to) the injecting fluid 304 of the fracturing fluid, acid or the nitrogen that carry full proppant as being bored a hole by the target of showing in 305 zones of substantially indicating.Under some situations, allow injecting fluid 304 upwards to move at pit shaft 301 rears as by 306 one group of overpunching substantially showing in the zones of indication, and the described perforation of passing 306 places is reintroduced to pit shaft 301.This is attributable to the bad cementing between pit shaft and the rock stratum, or owing to the vertical extension in the crack of pit shaft 301 outsides.Under this situation for example, injecting fluid 304 can be then with by 307 substantially another group overpunching in the zones of indication be communicated with, thereby cause non-desired pressure break or the stimulation of those overpunchings at 307 places.
Fig. 3 B shows the layout of the removable or separate cup 308 on the coil pipe 309, and described removable or separate cup 308 suppresses injecting fluids 304 and prevents itself and being communicated with of the overpunching group at 307 places.In present application for patent, this use of removable or separate cup system is referred to as " secondary inhibition ".
The description of the layout of the removable or separate cup that Fig. 3 C amplification secondary suppresses, its explanation has the conventional fracturing tool of bottom cup 302, upper cup 303 and the second upper cup 308, and described the second upper cup 308 is the removable or separate cups that are fixed to coil pipe 309.
Referring to Fig. 4, showed before that conventional coil pipe fracturing tool can comprise a group or more relative cup to suppress injection pressure, and also described because the restriction of crane or lubricating coupler, the interval when upper cup and the coil pipe instrument that is attached to coil pipe are integral between these glasss or glass group can be restricted.Fig. 4 describes the application of separation or removable cup, and wherein the coil pipe fracturing tool does not have and the all-in-one-piece upper cup of instrument own so that it comprises bottom cup 401 through revising.By coiled tubing connector 402 fracturing tool is connected to coil pipe 408, but upper cup is to be positioned at strategically coil pipe 408 tops of coiled tubing connector 402 tops so that for pressure break or stimulation provide separation or the removable cup 403 that prolongs the interval, and described prolongation interval exceeds in upper cup and the coil pipe fracturing tool is integral and possible interval in the situation below the coiled tubing connector 402.In this uses, allow injecting fluid 404 by being communicated with and stimulation or pressure break rock stratum by the perforation of the instrument that is adjacent in the zone of 405 large volume descriptions and by the perforation that vertically removes from instrument itself in the zone of 406 and 407 large volume descriptions.This application is called as pressure break or the stimulation of " extending length ".
Fig. 5 A and 5B describe an embodiment of removable cup.Removable cup has the internal diameter of expansion so that coil pipe can be freely by cup when transporting coil pipe in well before cup is attached to coil pipe.The typical packer cups that is used for the fracturing operation of 4.5 inches sleeves has the internal diameter less than 2.625 inches, but and these cups have 3.000 inches ID (internal diameter).In addition, by screw thread cup is attached to it and installs on axle, described screw thread is machined in the internal diameter of top part of outer sleeve 504 and through being screwed on the sliding part retainer.The conventional packer cup of prior art is attached to the axle with taper support axle collar, the described axle collar prop up axle and clamp the cup the rear portion.
By o ring or replacement seal technology cup is sealed on the coil pipe.The stationary fit that the rear end that support ring by conventional packer cup props up cup produces when tightening is sealed to it with conventional packer cup axle is installed separately.
Cup also has built in break away feature.If becoming, cup is trapped in the well, so might be with the cup drawing crack.The paired coil pipe of engineering design of notched section on the threaded portion of cup applies predetermined pull and just can rupture.
In Fig. 5 A, show the removable cup 501 through assembling.Removable cup 501 comprises outer sleeve 504, inner sleeve 505 and elastomeric packer element 506.Flexible member is hydrogen saturated nitrile rubber (HSN) or polyurethane normally, but can be to be considered to be applicable to expect any polymer of this instrument with the conditions down-hole of experience.
According to the elastic body that will use, can carry out by some methods the structure of cup.In one embodiment, inner sleeve 505 is placed on outer sleeve 504 inside so that the bottom of inner sleeve 505 or shoulder outwards against the internal diameter of outer sleeve 504.Then inner sleeve 505 and outer sleeve 504 are placed in the mould or foundry goods of preformed with the shape of being wanted that removable cup 501 is provided.Then elastomeric material is poured into or press-in die in and make its sclerosis or curing, and between inner sleeve and outer sleeve and elastomeric material, provide adhesion.
Fig. 5 B is that the exploded view of assembly of Fig. 5 A is to show additional detail.The surface of inner sleeve 505 through rib (rib) being increased in the adhesion between elastic body and the inner sleeve 505, and again for the purpose that increases the adhesion between elastomeric material and the collar, but hole 507 can or delocalization in outer sleeve 504.Notched section 503 is machined in the outer sleeve 504 breakaway poing or the weakness that will separate to allow under predetermined axial force under composite member is trapped in situation in the pit shaft.Inner surface at outer sleeve 504 in by the zone of 502 large volume descriptions adds screw thread, so that it can be screwed on the remainder of composite member, as after a while described in Fig. 6 A.
Alternate embodiment will be carried out sandblast to the surface of inner sleeve 505 and outer sleeve 504, will again improve the rough surface of the adhesion between collar material and the elastomeric material in order to provide.
Injection or compression molded process are not need common operation that the those skilled in the art is further explained.
Available extra spring steel support member (not shown) is constructed second embodiment of this glass so that performance and the support structure in the strict application of improvement.These spring steel support members can be comprised of the concentric shells of sheet metal or the finger of being made by the wire that bends to the U shape.With these spring steel support member epoxidations (epoxied) or welding or otherwise be fixed in the chamber between outer sleeve 504 and the inner sleeve 505.Contained other configuration of additional support, and any technician in packing cup structure field will understand described configuration.
Fig. 6 A describes an embodiment of removable cup system, its be used for as before about the described coil pipe of removable cup system pressure break or stimulate and prolong the interval optionally.
Be screwed to removable fracture cups 501 on the sliding part retainer 605 and be installed on the coil pipe 610.The external diameter of removable fracture cups 501 and hardness are so that in being transported to sleeve and when standing pressure from cup below, cup expands to form sealing against sleeve diameter.Two o ring devices 602 are in the inside at top of removable cup 501 to seal forming between the inner surface of removable cup 501 and the coil pipe 610.O ring partition 603 is positioned between two o rings 602, providing spacing and integrality between the sleeve pipe 604 that reduces at o ring 602 and ID, and the sleeve pipe 604 that reduces of described ID is used for eliminating any void space between coil pipe 610 and sliding part retainer 605.The sleeve pipe 604 that o ring partition 603 and ID reduce must support o ring and be extruded on the sliding part retainer 605 to prevent it.Although clearly show among the figure, the sleeve pipe 604 that o ring partition 603 and ID reduce is manufactured separately two half-unit and is installed on the pipeline allowing.
Sliding part retainer 605 provides some sliding parts is positioned at member between sliding part retainer 605 and the coil pipe 610.Described sliding part is in two layers in the sliding part retainer 605 and interacts in essence to prevent movement along on the either direction of coil pipe 610.In the embodiment of Fig. 6 A, separate and separate two layers of outside grapple 606 by intermediate slider support ring 607.Be retained in the sliding part retainer 605 by the upper strata of sliding part support ring 608 with sliding part.Holding nut 609 is used for grapple 606 is retained in the appropriate location, and holding nut 609 is screwed in the sliding part retainer 605 axial force is transferred to sliding part support ring 608 and intermediate slider support ring 607 to start sliding part.
Fig. 6 B is that the exploded view (not having coil pipe 610) of the assembly of Fig. 6 A is to provide the additional detail of individual component.
Fig. 7 shows the assembling of the equipment of the installation that is used for removable cup composite member.Operation window 701 is used for allowing after coil pipe 610 being transported in the well near coil pipe 610.To those of ordinary skill in the art, operation window is common coil pipe operating means and does not need to specifically describe.Operation window 701 is used for allowing removable cup composite member 702 is installed on the coil pipe 610 of bottom hole assemblies part 704 tops.In operation window 701, use cup holding device 703 in order in operation window 701, be static with removable cup composite member 702 fixings when in well, transporting coil pipe 610.This glass holding device 703 can be simple as C shape plate, and described C shape plate is well-known for the technician of coil pipe field operation, and does not further describe herein.
Operation window 701 is attached to the preventer of substantially being indicated by the 705 zone institutes of describing, and it has accommodated one or more paddle type blowout hookups, and the one in the described device can be pipe ram assemblies 706.Pipe ram assemblies also is the well-known common apparatus of the technician of coil pipe field operation, and does not therefore describe in more detail.
Installation for removable cup composite member is attached to dimple connector (not shown) end of coil pipe 610 to allow following mounting shaft subdrilling tool composite member 704.To those of ordinary skill in the art, the dimple connector also is common apparatus, does not therefore further show or description.
Referring to Fig. 6 A or 6B, in order to prepare holding nut 609 to be screwed on the coil pipe 610, and then to slide at sliding part support ring 608 such as 702 described removable cup composite membeies among Fig. 7.Then also intermediate slider support ring 607 is slided on the coil pipe 610.
Two o rings 602 are pressed onto on the screw thread of sliding part retainer 605.Removable cup 501 is screwed on the sliding part retainer 605 so that o ring 602 is retained in the appropriate location.Sliding part retainer 605 and the removable cup 501 that then will have o ring 602 slide on the coil pipe 610.Make sliding part support ring 608 fall into sliding part retainer 605, and holding nut 609 loosely is screwed on the sliding part retainer 605 in order to composite member is retained in together.
If extra removable cup will be installed, repeat this process for each additional cup composite member so.
Return referring to Fig. 7, the coil pipe operation sequence of Application standard is connected to coil pipe with bottom hole assemblies part 704.
Then bottom hole assemblies part 704 and one or more removable cup 702 are protruded in the operation window 701.Cup retaining member 703 is placed in the operation window 701 between bottom removable cup composite member 702 and the bottom hole assemblies part 704.Close operation window 701, and with coil pipe 610 be transported in the well arrive institute's degree of depth of wanting simultaneously glass retaining member 703 in operation window 701, be static with removable glass of composite member 702 fixings.
Reach between removable cup composite member 702 and the bottom hole assemblies part 704 want spacing after, stop coil pipe 610, and close pipe ram assemblies 706 so that operation window 701 and well bore isolation.Open operation window 701 to expose coil pipe 610 and removable cup composite member 702.
Again referring to Fig. 6 A, screw lower removable cup 501 from sliding part retainer 605, and remove o ring 602 from sliding part retainer 605, and nothing retrains around allowing coil pipe 610.The first o ring 602 is slided in the bottom of packing gland of sliding part retainer 605 and push it to the bottom of gland.O ring spacer halves 603 is inserted in the sliding part retainers 605, and with top o ring 602 down slidings to o ring partition 603 tops.
Remove holding nut 609 and sliding part support ring 608 from sliding part retainer 605.The sleeve halves 604 that ID is reduced is placed on the bottom of sliding part retainer 605, and removable cup 501 is screwed on the sliding part retainer 605, and it is locked in the sleeve pipe 604 that o ring 602 and o ring partition 603 and ID reduce in the appropriate location.
The first floor of sliding part is installed in the top of sliding part retainer 605, and intermediate slider support ring 607 is placed in the sliding part retainer 605 at first floor top of sliding part.Every one deck of sliding part can be comprised of three sliding parts usually, but it can have more sliding parts and maybe can have still less sliding part.Then the second layer with sliding part inserts in the sliding part retainer 605 at intermediate slider support ring 607 tops, and with sliding part support ring 608 in the sliding part retainer of the top of the upper layer that drops to sliding part.Then be screwed to holding nut 609 in the sliding part retainer 605 and it is tightened so that sliding part props up coil pipe 610.
Again referring to Fig. 7, then remove glass retaining member 703 and close operation window 701 from operation window 701, opening conduits ram assemblies 706, and in well, transport coil pipe 610 arrive the degree of depth of wanting for stimulation applications.
After finishing stimulation applications, coil pipe 610 is pulled out to the degree of depth of mounting cup from well.Removable cup composite member 702 is moved in the operation window 701, closed pipe ram assemblies 706, open operation window 701, and cup retaining member 703 is positioned in the operation window 701.Screw lower removable cup 501 and remove o ring partition 603 from sliding part retainer 605, and remove o ring 602 from coil pipe 610.Screw lower support nut 609 and remove sliding part.Then will remain assembly loosely screws back together and allows on its pipe ram assemblies 706 that drops on preventer 705 inside.
Close operation window 701, opening conduits ram assemblies 706, and according to the coil pipe operation sequence of standard coil pipe 610 is pulled out from well.
Describe now and be used for realizing that secondary pressure suppresses and prolong the second method of pressure break or two application of stimulation lengths.This embodiment uses separate cup design, and described separate cup design authorized pressure restraining device or fracture cups and retaining member directly are installed to coil pipe and need to device be placed on the coil pipe during in the surface at coil pipe.
Referring to Fig. 8 A, show the fracture cups design, it has arrived in the pit shaft at coil pipe with permission in two and after the certain depth cup has been placed on the coil pipe.The cup of showing among cup and Fig. 5 B 501 is of similar shape and size, except described cup through processing or be molded as two indivedual half ones 803 and 804.Whenever half one is shown as and has positive link 801 and cloudy link 802, so that two ends 801 and 802 are combined together with the mineralization pressure integrated sealing when two half- unit 803 and 804 links together by compressive force.Fig. 8 B shows an embodiment of the design of matching surface, yet, can with many different designs realize with by the identical function of 801 and 802 functions of showing.
Referring to Fig. 9 A, show that two cup half ones 803 and 804 engage at coil pipe 901, and show that matching surface 801 and 802 is closed on coil pipe 901.In two cup half ones 803 and 804 appropriate locations that are fixed on the coil pipe 901 and by lock(ing) bolt 904 two packer cup mandrel halves 902 and 903 are locked in the appropriate location.
Fig. 9 B is the separate cup composite member showed among Fig. 9 A as by the described cross section of section line A-A '.Displaying is fixed to coil pipe 901 by a series of sliding parts 905 with packer cup mandrel halves 902 and 903, and described sliding part 905 is constrained in the appropriate location of two cup axles, half one 902 and 903 belows.Retrain extraly cup by a series of interlocking grooves 906, described groove 906 cooperates the outside of packer cup 803 and 804 with cup axle half one 902 and 903.With packing chamber 907 be worked into the top of packer cup and packer cup mandrel halves 902 and 903 among both to allow the inserting packing thing, between coil pipe 901 and packer cup halves 803 and 804, to provide pressure isolation.By one or more bolts 904 packer cup mandrel halves 902 and 903 is locked in the position on the coil pipe 901.For extra pressure support is provided, matching surface skew 90 degree of cup half one 801 and 802 matching surface and cup axle half one 902 and 903.
Now referring to Figure 10, according to the coil pipe method of routine, coil pipe pressure break or stimulation tool 1001 are connected to coil pipe 901 and lubricated entering in the pit shaft.Coil pipe pressure break or stimulation tool dispose bottom cup, and according to the purpose that operates, coil pipe pressure break or stimulation tool can or can not dispose top cup.When wishing that separate cup is used for using top cup when secondary pressure suppresses, and if wish that separate cup is used for pressure break or the stimulation of extending length, does not use top cup so.Operation window 1003 is connected to the top of blowout prevention stacking 1004, and coil pipe fracturing tool 1001 is transported to the degree of depth that arrives in the pit shaft by the location positioning of wanting of separate cup.After arriving institute and wanting the degree of depth, stop coil pipe 901, and start pipe ram 1005 so that operation window 1003 and wellbore pressure are isolated.Leave behind and open operation window 1003 in order to allow near coil pipe 901.Separate cup half one 803 and 804 is attached to coil pipe 901, pack-off element (not shown) is placed in the packing chamber (show among Fig. 9 B 907) and sliding part (show among Fig. 9 B 905) is placed on the coil pipe 901.By lock(ing) bolt (as show among Fig. 9 A and the 9B 904) by packer cup mandrel halves 902 and 903 with cup half one 803 and 804 and sliding part 905 and pack-off element be locked in the appropriate location on the coil pipe 901.Then close operation window 1003, opening conduits flashboard 1005 and with coil pipe 901 be transported to arrive in the well the degree of depth of wanting for pressure break or stimulation applications.
By when pulling out well at window or coil pipe syringe place mark separate cup composite member, close pipe ram 1005, the operation window 1003 of leaving behind, open operation window 1003 and assign to remove the separate cup composite member by the remainder that removes bolt 904 and separate cup composite member and finish removing of separate cup.Then again close operation window 1003, opening conduits flashboard 1005 and move coil pipe pressure break or stimulation tool 1001 to surface according to common coil pipe operation.
Should be appreciated that according to the needed degree of pressure restraining, the installation of separation or removable cup and the description of assembling can comprise a group or more and separate or removable cup.Can contain the many modifications to assembling and erection procedure.
Claims (12)
1. the pressure restraining method in the pit shaft, described pit shaft has will be by a plurality of districts of pressure break, and it may further comprise the steps:
Coil pipe is provided, and described coil pipe has one group of non-removable fixation pressure restraining device on the far-end of described coil pipe;
Removable pressure containment devices is provided, and described removable pressure containment devices can be positioned in along the optional position on the length of described coil pipe;
Described coil pipe is inserted arrival first degree of depth in the described pit shaft, simultaneously described removable pressure containment devices is maintained the surface;
Described removable pressure containment devices is fixed in the position on the described coil pipe, and this position is apart from the distance of one section expectation of described one group of non-removable fixation pressure restraining device;
Described coil pipe is inserted arrival second degree of depth in the described pit shaft;
Whereby, described one group of non-removable fixation pressure restraining device is crossed over will be by the target area of pressure break, and described removable pressure containment devices is orientated as and is higher than overp0unch.
2. pressure restraining method according to claim 1, it further provides the bottom hole assemblies part, and wherein said non-removable fixation pressure restraining device is fixed to described bottom hole assemblies part.
3. pressure restraining method according to claim 2, wherein said bottom hole assemblies part is fracturing tool.
4. according to claim 1,2 or 3 described pressure restraining methods, wherein said removable pressure containment devices comprises locking component, and described locking component is used for will described removable pressure containment devices being fixed on the described coil pipe so that described removable pressure containment devices and described coil pipe reduce simultaneously when described coil pipe being inserted described second degree of depth of described pit shaft arrival.
5. pressure restraining method according to claim 4, it further comprises along the lower of described removable pressure containment devices and to eyelet fluid is incorporated into step in the described pit shaft, and described whereby removable pressure containment devices limits described fluid along the circulation of the upward hole eye of described removable pressure containment devices.
6. pressure restraining method according to claim 5, wherein said non-removable fixation pressure restraining device is packer cup.
7. pressure restraining method according to claim 6, wherein said removable pressure containment devices is packer cup.
8. pressure restraining method according to claim 1, wherein before described coil pipe being inserted the step that described pit shaft arrives first degree of depth, described removable pressure containment devices is on described coil pipe, wherein during described coil pipe being inserted the step that described pit shaft arrives first degree of depth, keep described removable pressure containment devices in the surface, described coil pipe passes described removable pressure containment devices.
9. pressure restraining method according to claim 1, wherein after described coil pipe being inserted the step that described pit shaft arrives first degree of depth, described removable pressure containment devices is positioned on the described coil pipe.
10. according to claim 8 or 9 described pressure restraining methods, wherein said removable pressure containment devices is separate cup.
11. pressure restraining method according to claim 1, wherein said one group of non-removable fixation pressure restraining device comprise that the location is to cross over by the relative packer cup of the target area of pressure break.
12. pressure restraining method according to claim 11, wherein said removable pressure containment devices comprises an above packer cup.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002532295A CA2532295A1 (en) | 2006-01-06 | 2006-01-06 | Packer cups |
| CA2,532,295 | 2006-01-06 | ||
| CA2,552,072 | 2006-07-14 | ||
| CA002552072A CA2552072A1 (en) | 2006-01-06 | 2006-07-14 | Packer cups |
| PCT/CA2007/000015 WO2007076609A1 (en) | 2006-01-06 | 2007-01-08 | Pressure containment devices and methods of using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101365863A CN101365863A (en) | 2009-02-11 |
| CN101365863B true CN101365863B (en) | 2013-04-17 |
Family
ID=38229449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780001974.XA Expired - Fee Related CN101365863B (en) | 2006-01-06 | 2007-01-08 | Pressure containment methods of shaft |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101365863B (en) |
| CA (1) | CA2532295A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013032433A1 (en) * | 2011-08-29 | 2013-03-07 | Halliburton Energy Services, Inc. | Downhole fluid flow control system and method having dynamic response to local well conditions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897826A (en) * | 1972-07-24 | 1975-08-05 | Chevron Res | Method for well workover operations |
| US5845711A (en) * | 1995-06-02 | 1998-12-08 | Halliburton Company | Coiled tubing apparatus |
| US6260623B1 (en) * | 1999-07-30 | 2001-07-17 | Kmk Trust | Apparatus and method for utilizing flexible tubing with lateral bore holes |
| US6439302B1 (en) * | 2000-07-25 | 2002-08-27 | Vanoil Equipment Inc. | Stripper packer |
| US6446727B1 (en) * | 1998-11-12 | 2002-09-10 | Sclumberger Technology Corporation | Process for hydraulically fracturing oil and gas wells |
-
2006
- 2006-01-06 CA CA002532295A patent/CA2532295A1/en not_active Abandoned
-
2007
- 2007-01-08 CN CN200780001974.XA patent/CN101365863B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897826A (en) * | 1972-07-24 | 1975-08-05 | Chevron Res | Method for well workover operations |
| US5845711A (en) * | 1995-06-02 | 1998-12-08 | Halliburton Company | Coiled tubing apparatus |
| US6446727B1 (en) * | 1998-11-12 | 2002-09-10 | Sclumberger Technology Corporation | Process for hydraulically fracturing oil and gas wells |
| US6260623B1 (en) * | 1999-07-30 | 2001-07-17 | Kmk Trust | Apparatus and method for utilizing flexible tubing with lateral bore holes |
| US6439302B1 (en) * | 2000-07-25 | 2002-08-27 | Vanoil Equipment Inc. | Stripper packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2532295A1 (en) | 2007-07-06 |
| CN101365863A (en) | 2009-02-11 |
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