CN101126311B - Petroleum horizontal well expansion sand control screen device and expansion technique - Google Patents
Petroleum horizontal well expansion sand control screen device and expansion technique Download PDFInfo
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- CN101126311B CN101126311B CN 200710059720 CN200710059720A CN101126311B CN 101126311 B CN101126311 B CN 101126311B CN 200710059720 CN200710059720 CN 200710059720 CN 200710059720 A CN200710059720 A CN 200710059720A CN 101126311 B CN101126311 B CN 101126311B
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Abstract
The invention relates to a petroleum horizontal well expansion sand control screen device and an expansion technology method. The device comprises an ordinary sleeve, a horizontal sleeve and an expansion device. The horizontal sleeve comprises a hanging pair at the front end, a horizontal sleeve sieve tube in the middle, an emission chamber in the relative rear and a drill bit at the rear end which are sequentially connected. The expansion device comprises an expansion head, a packing, an emission chamber, a drill stem, a drill stem tube union and a ball-sliding pipe socket. The invention canconsiderably improve the oil pumping output of the single well, and compared with the vertical well, the daily output of the crude oil of the single well of the horizontal well expansion sieve tube can improve by 4-10 times. More particularly, the invention can cause the speed of the oil flow is matched with the infiltration speed of the strata to realize the purpose of reasonable resource utilization and the continuous, high and stable yield. The invention is simple in structure, convenient in construction and is stable, reliable, economic and feasible and is easy for popularization.
Description
Technical field
The present invention relates to the petroleum casing pipe technology, particularly a kind of petroleum horizontal well expansion sand control screen device and expanding process, it is a kind of big oily stream interface expansion compound sand-prevention screen pipe of simple structure.
Background technology
In order to improve crude oil output and quality, be extensive use of non-bloating horizontal well sand control bushing pipe at present.Because traditional sand control bushing pipe internal diameter is less, big space is arranged between bushing pipe and the drilling well bore hole wall, the part causes paralysis to collapse, and forms dead layer of sand, has dwindled oily stream interface, then influences the crude oil output; Bushing pipe itself has the wide seam of 0.3-0.4mm to influence the effect of removing sand in addition.Be stained with the 18-P5# horizontal well and adopt unexpansive anti-sand tube sieve oil recovery factory, Shengli Oil Field river mouth, although the certain effect of output, desanding effect is bad.
Bake, Harriburdon, Weatherford three companies propose the multilayer sand control screen at present, and for avoiding prior pack gravel, porous filter screen or establishment wrapping wire are used in its main desanding design, but expensive, are difficult to large tracts of land and promote.In addition, oily stream interface is still less than normal, and daily output remains further to be improved, and for enlarging oily stream interface, Weatherford releases rotation expansion multilayer screen casing.It is owing to take rotation to roll expansion, and it creates the unbalance stress of journey spin own, and inner surface is uneven, the changing of the relative positions of screen casing interlayer; In addition, cross bend and adopt the sliding round bur bar of a large amount of bands, economic drain is huge.
Summary of the invention
The purpose of this invention is to provide a kind of petroleum horizontal well expansion sand control screen device and expanding process.The present invention utilizes sliding pearl pipe box to reduce the sleeve pipe curve resistance effectively, improves the versatility that drilling rod uses.The present invention can increase substantially the petroleum single well oil pumping yield, compares with peupendicular hole, and the daily output of horizontal well expansion screen casing individual well crude oil can improve 5～10 times.Oily stream and stratum rate of infiltration have been mated in the present invention especially, rationally use resource, can continue to reach the purpose of high and stable yields.Have simple in structure, easy construction, characteristics such as economical and practical, reliable and stable.
Petroleum horizontal well expansion sand control screen device provided by the invention comprises ordinary casing, horizontal case, expansion gear three parts.
Described ordinary casing comprises that upper vertical moves towards sleeve pipe and lower knuckle sleeve pipe two parts, and the effective union of whole cover each root sleeve pipe that is threaded forms, and jacket exterior is by the traditional handicraft slip casting well cementation of going ahead of the rest.The initial end of flex socket to terminal gradually bending turn to, its tail end and horizontal case front end form hang secondary.Hang the tail end that secondary horizontal case front end for the outer adhesive tape of band inserts flex socket, through an expansion pressing of expanding, form the formula that interfixes and connect.
The initial end of described flex socket to terminal gradually bending to turn to be every meter nearly 1 °, accumulation turns to 90 °.
Described horizontal case comprises that the front end that connects successively hangs secondary, middle horizontal case screen casing, relatively the bay at rear portion and the ground lance of rearward end.
The ground lance of described horizontal case comprises slide block, connecting rod, support end, locating piece and lance pawl.Between slide block and the connecting rod, between connecting rod and the lance pawl, the lance pawl with support all to be connected with hinge between the end, can relatively rotate.Described slide block end has caulking gum.
The bay of described horizontal case comprises one section entity pipe, and its front end has bloated head, and there is slide block the rear end, forms confined space.By the head bottom mesopore water filling of the expanding hydraulic pressure of feeding, can promote to expand head and slide block seesaw, and the motive force that the motive force of design expansion tube is propped greater than slide block moves to left so that the motion that moves to right of slide block is done earlier to expand.
Described horizontal case screen casing is made up of the screen casing of single fixed length, between the single screen casing by the screen casing union with being threaded, the screen casing body is multi-layered composite pipe, by from outer to inner order by outer circular hole layer, bag stone layer, form around hole layer and interior circular hole layer.
Described outer circular hole layer is near the bore hole wall of oil well, and the hole of outer circular hole layer is orderly distribution, and circumference is divided equally in the circumferential row hole site, and the tube axial direction at round center distance is greater than diameter of a circle, the distribution straggly of adjacent round position.
General sand control pipe unit adopts the peripheral gravel of filling, and the big technology of engineering quantity is also very complicated in advance.The present invention is contained within gravel among the tube wall, easy construction, simple and practical.Described screen casing time outer field bag stone layer refers to that this layer metal tube itself has the orderly circular hole of arrangement, the nearly isodiametric gravel of filling or haydite in the hole.Gravel or haydite diameter D are decided by to stop the minimum diameter d of sand grains
o, have:
D＝6.45d
o；
Slit fluid can have free passage therebetween, but prevents greater than inscribed circle diameter d
oSand grains passes through.
Described screen casing is the leg-of-mutton hole of continued circling that all distributing around the hole layer.
Described screen casing essence is made up of outer circular hole layer pipe, interior circular hole layer pipe and bag stone layer pipe, two interfaces of adjacent tubes: i.e. the interface of outer circular hole layer and bag stone layer, interior circular hole layer is all distributing around the hole layer with the interface of bag stone layer.The length of side L of equilateral triangle is in stoping sand grains minimum dimension d
oConcern following this bed boundary:
L＝1.732d
o，
Be that the isosceles triangle of L has to the base
L＝ctgθ/2·d
o
Oily stream is pooled in the circular hole that connects wall and enters in the screen casing in the hole.The oil stream of oil reservoir infiltration through the filtration around hole layer and bag stone layer gravel slit, is fed into around the hole layer by outer circular hole layer again, is pooled to interior circular hole, flows into the screen casing inner chamber at last.
The assembly method of described screen casing: three layers of pipe that diameter are bordering on assembling diameter 98% respectively with the dividing head anchor clamps are installed by sliding method of completing the square, and the same plane of its circumferential home position and the circumferential center of circle of adjacent tubes is by the indexing fixture control.Its axial plane relative position relies on and pushes the die surface size Control, makes the circular hole coordinate position at 1/2nd places of the adjacent tubes circular hole line of centres; Earlier circular hole pipe and bag stone layer pipe in the assembling, putting into behind the gravel again in the circular hole, row is inserted in outer circular hole layer.Calibration location back is with the three layers of pipe of a pressing screen casing that expand, be adjacent to be press-fitted and be combined into one mutually.Expansion hole enlargement about 2% reaches fitted position, and in three layers of pipe with the main body framework of bag stone layer pipe as screen casing, tie by its end buttress thread and screen casing union spiral shell.
Described expansion gear comprises the head that expands, packing, bay, drilling rod, drilling rod union and sliding pearl pipe box.Described sliding pearl pipe box is the pipe box of the sliding pearl of two ends band, and sliding pearl is the ball of tape spool, and ball journal is supported on the bearing support of pipe box, and sliding pearl can unsettledly freely be rotated around axle, and rotational plane is parallel with tubular axis.Owing to the rolling friction that sliding friction is converted to the short arm of force, this has significantly reduced crooked sleeve friction resistance.When drilling rod connects, will slide the pearl pipe box simultaneously and be enclosed within on the drilling rod, after screw screw thread.Promote sliding pearl pipe box by drilling rod union protruding part, thereby be synchronized with the movement with drilling rod by drive.Drilling rod is screwed onto on the head that expands, and runs through the head bottom of expanding.
The expanding process of described petroleum horizontal well expansion sand control screen device comprises the steps: with drilling rod screen casing to be sent behind the horizontal well bottom, inject water under high pressure by the drilling rod interstitial hole, the bay supercharging, slide block begins to move to right, prop the lance pawl by connecting rod, when slide block contact locating piece, then motion stops.This moment, the horizontal case right-hand member was fixed because the ground lance is located.The head that then promotes to expand when continuing to pressurize is moved to the left, and runs into screen casing when shifting out the bay section, the expansion of screen casing hole enlargement mesh, and then the pressure demonstration is fallen suddenly, begins upwards drawing drilling rod this moment, helps the process turning around a curve by sliding pearl pipe box, and the pulling drilling rod moves to left.Sliding pearl pipe box has reduced the resistance that drilling rod is crossed bend, and general pulling capacity is less than 15 tons, the head distending screen casing in the process that is moved to the left that expands, and internal diameter enlarges more than 75% than traditional screen casing.
Expansion slot MULTILAYER COMPOSITE screen casing provided by the invention can increase substantially the petroleum single well oil pumping yield, compares with peupendicular hole, and the daily output of horizontal well expansion screen casing individual well crude oil can improve 5～10 times.Oil stream flow velocity and stratum rate of infiltration are mated in the present invention especially, rationally use resource, can continue to reach the purpose of high and stable yields.Apparatus of the present invention are simple, easy construction, reliable and stable, economically feasible, are convenient to promote.
Description of drawings:
Fig. 1 is the whole generalized section of petroleum horizontal well expansion sand control screen device of the present invention.
The specific embodiment:
As shown in the figure: 1. sleeve pipe, 2. slide the pearl pipe box, 3. hang secondary, 4. the sleeve pipe union, 5. drilling rod, 6. the screen casing union, 7. expand head, 8. packing, 9. outer circular hole layer, 10. bag stone layer, 11. circular hole layer, 13. bays, 14. slide blocks, 15. connecting rods, 16. locating pieces, 17. supports around hole layer, 12. in hold, 18. lance pawls.
Petroleum horizontal well expansion sand control screen device of the present invention comprises ordinary casing, horizontal case, expansion gear three parts composition.The horizontal case of horizontal well expansion sand control screen is by the suspension pair of front end, middle screen casing, and the ground lance of the bay at rear portion and rearward end is formed relatively.Screen casing in the middle of the described horizontal whereabouts is made up of the screen casing of single fixed length, be threaded by screen casing union 6 usefulness between the single screen casing, the screen casing body is multi-layered composite pipe, by from outer to inner order by outer circular hole layer 9, bag stone layer 10, form around hole layer 11, interior circular hole layer 12.The oil stream of oil reservoir infiltration through the filtration around hole layer 11 and bag stone layer 10 gravel slit, is fed into around hole layer 11 by outer circular hole layer 9 again, and circular hole 12 in being pooled to flows into the screen casing inner chamber at last.
The ground lance of horizontal case is made up of slide block 14, connecting rod 15, support end 17, locating piece 16 and lance pawl 18.Between slide block and the connecting rod, between connecting rod 15 and the lance pawl 18, lance pawl 18 with support all to be connected with hinge between the end 17, can relatively rotate.Described slide block 14 ends have caulking gum.
The bay 13 of horizontal case comprises one section entity pipe, and its front end has bloated 7, and there is slide block 14 rear end, forms confined space.By the bloated 7 bottom mesopore water filling hydraulic pressure of feeding, can promote to expand 7 and slide block 14 seesaw, the motive force that the motive force of design expansion tube is propped greater than slide block 14 is so that the moving to right motion and 7 move to left prior to expanding of slide block 14.
Expansion gear comprise expand 7, packing 8, bay 13, drilling rod 5, drilling rod union and sliding pearl pipe box 2.Described sliding pearl pipe box 2 is pipe boxes of the sliding pearl of two ends band, and sliding pearl is the ball of tape spool, and ball journal is supported on the bearing support of pipe box, and sliding pearl can unsettledly freely be rotated around axle, and rotational plane is parallel with tubular axis.Owing to the rolling friction that sliding friction is converted to the short arm of force, this has significantly reduced flex socket frictional resistance.When drilling rod 5 connects, will slide the pearl pipe box simultaneously and be enclosed within on the drilling rod, after screw screw thread.Block sliding pearl pipe box 2 by drilling rod 5 union protruding parts, thereby can be synchronized with the movement with drilling rod 5.Drilling rod 5 is screwed onto on bloated 7, and runs through bloated 7 bottom.
Expanding process is: with drilling rod 5 screen casing sent behind the horizontal well bottom, injects water under high pressure by drilling rod 5 interstitial holes, and bay 13 superchargings, slide block 14 begins to move to right, and props lance pawl 18 by connecting rod, and behind slide block 14 contact locating pieces 16, then motion stops.This moment, the horizontal case right-hand member was fixed because the ground lance is located.Move left backward when the continuation pressurization then promotes bloated 7, run into screen casing for 13 sections when shifting out bay, the expansion of screen casing hole enlargement mesh, then the pressure demonstration is fallen suddenly, begins upwards drawing drilling rod 5 this moment, helps the process turning around a curve by sliding pearl pipe box 2, and pulling drilling rod 5 moves to left.Parrel truck has reduced the resistance that drilling rod is crossed bend, and general pulling capacity is less than 15 tons, expand 7 in the process that is moved to the left the distending screen casing, internal diameter enlarges more than 75% than traditional screen casing.
Application Example:
51/2 ＂ well, external diameter Φ 139.7mm, internal diameter Φ 124.5mm are tested in the oil field, the vertical section 2008m of well, bending section 88m, the 90 ° of right angles of transferring.These two parts are by the ordinary casing grouting and reinforcing, the long 1832m of horizontal well, bore 5 " bore hole (real size 4.9 "), the long 1840m of the bore hole of horizontal level, " drilling rod imports the horizontal well bottom with screen casing; screen casing adopts expansion tube material ZP08 to make its maximum outside diameter size of former screen casing three-layer composite pipe Φ 112mm, its slightest internal diameter size 97mm without exception to utilize 23/8.Calibration location back is with the bloated three layers of pipe of a pressing of Φ 100.5mm, be adjacent to be press-fitted and be combined into one mutually.Expansion hole enlargement about 2% reaches fitted position: external diameter Φ 114mm, internal diameter Φ 100mm, thickness 7mm, screen casing circular hole and bag stone circular hole are Φ 10, weekly 8 uniform, center to center distance 15mm between pipe row, the adjacent tubes misarrangement falls to distributing.It is quartzy river sand Φ 0.129mm that bag stone layer stores gravel, is positive triangle length of side L=3 around the cross section, hole.A bloated external diameter Φ 110.5mm, bay length 50mm.After injecting hydraulic pressure 22MPa, promote ground lance slide block and move to right, prop the lance pawl by connecting rod, stretch into bore hole wall and stratum, suspension and spacing, prevent from becoming flexible left.Behind slide block contact locating piece, stop to move right.Increase hydraulic pressure to 26MPa this moment, and the head that promotes to expand is moved to the left, and namely shows release when shifting out bay section chance screen casing.By upwards lifting drilling rod, lift 10 tons of power later on, lift the head that expands in the process and move to left, simultaneously the distending screen cloth.
The present invention shows following characteristics in work progress:
Compare oil production with fixed screen casing and improve more than the 50-70%, this horizontal well expansion sand control screen is 4～10 times of traditional straight well per unit area yield every day.
Because horizontal case expansion hole enlargement; the screen casing wall directly contacts with the bore hole wall; eliminate the inhomogeneous mobile and dead layer of sand in gap; enlarged oily stream interface, reduced skin factor, oil stream flow velocity and the naturally osmotic rate of unit area are complementary; form natural equilibrium oil stream device; protection oil field resource, and favourable control water content in crude oil can reach the purpose of long-term high and stable yields.
Bag stone layer is with filling outside the gravel scene, change in sand control installation in advance in filling.And can adapt to expansion flow process, gravel can be not crushed, saves construction man-hour and reduce cost of raw materials used.
Because the horizontal case section of oil well is not cemented the well, exempt perforation, reduced direct construction technology cost 15%.
Expansion fashion of the present invention belongs to the screen casing ring-type and evenly expands, and can guarantee the inner surface that screen casing is accurate and smooth.According to the dilatancy degree, can change the mesh parameter, be convenient to control desanding effect.
Utilize comprehensive mechanism, the desanding that complements each other, respond well, granularity only is 0.174% greater than 0.02～0.2 sand grains, former content 5.8% after the desanding in the crude oil, can remove 99.7%.But based on crude contains fineness of sand proportion design compound sand-prevention screen pipe geometry parameter and dilatancy degree.
The present invention utilizes sliding pearl pipe box to reduce the sleeve pipe curve resistance effectively, improves the versatility that drilling rod uses.Have simple in structure, easy construction, economical and practical, reliable and stable characteristics.
Claims (5)
1. a petroleum horizontal well expansion sand control screen device comprises ordinary casing, horizontal case, expansion gear;
Described ordinary casing comprises that upper vertical moves towards sleeve pipe and lower knuckle sleeve pipe two parts, the effective union of the whole cover single sleeve pipe that is threaded forms, the initial end of flex socket to terminal gradually bending turn to, the ordinary casing tail end is connected with the suspension parafacies of horizontal case front end, hang the tail end that secondary horizontal case front end for the outer adhesive tape of band inserts flex socket, through an expansion pressing of expanding, the fixed connection of formation; It is characterized in that:
Described horizontal case comprises: the suspension pair of the horizontal case front end of Lian Jieing successively, middle horizontal case screen casing, the expansion gear at rear portion and the ground lance of rearward end relatively;
Described expansion gear comprises the head that expands, packing, bay, drilling rod, drilling rod union and sliding pearl pipe box, sliding pearl pipe box is the pipe box of the sliding pearl of two ends band, sliding pearl is the ball of tape spool, ball journal is supported on the bearing support of pipe box, sliding pearl can unsettledly freely be rotated around axle, rotational plane is parallel with tubular axis, to slide the pearl pipe box simultaneously when drilling rod connects is enclosed within on the drilling rod, after screw screw thread, by the sliding pearl pipe box of drilling rod union protruding part screens, thereby be synchronized with the movement with drilling rod, drilling rod is screwed onto on the head that expands, and runs through the head bottom of expanding;
Described bay refers to be positioned at the above-mentioned bloated head of its front end, the slide block of rear end, and one section middle entity sleeve pipe forms confined space; By the head bottom mesopore water filling of the expanding hydraulic pressure of feeding, can promote to expand that head moves to left and slide block moves to right, the motive force that the motive force of design expansion tube is propped greater than slide block moves to left so that the head that expands is done in the motion that moves to right of slide block earlier.
2. according to the described petroleum horizontal well expansion sand control screen device of claim 1, it is characterized in that described horizontal case screen casing is made up of the screen casing of single fixed length, between the single screen casing by the screen casing union with being threaded, the screen casing body is multi-layered composite pipe, by from outer to inner order by outer circular hole layer, bag stone layer, form around hole layer and interior circular hole layer; Described outer circular hole layer is near the bore hole wall of oil well, and the hole of outer circular hole layer is orderly distribution, and circumference is divided equally in the circumferential row hole site, circumferentially round is on the expansion tube face, the distance of its circumferential edges is greater than the diameter of hole circle, and circumferential position is identical every several rows of hole, the distribution straggly of adjacent round position; Described screen casing time outer field bag stone layer refers to that this layer metal tube itself has the orderly circular hole of arrangement, the nearly isodiametric gravel of filling or haydite in the hole; Described screen casing is around the hole layer, be tri-angle-holed around surface course.
3. according to the described petroleum horizontal well expansion sand control screen device of claim 2, it is characterized in that diameter D and the sand grains minimum diameter d of described gravel or haydite
oRelational expression: D=6.45d
o
4. according to the described petroleum horizontal well expansion sand control screen device of claim 1, the assembly method that it is characterized in that described horizontal case screen casing: three pipes that diameter are bordering on assembling diameter 98% respectively with the dividing head anchor clamps are installed by sliding method of completing the square, the same plane of its circumferential home position and the circumferential center of circle of adjacent tubes, controlled by indexing fixture, its axial plane relative position relies on and pushes the die surface size Control, and namely the circular hole coordinate position is at 1/2nd places of the adjacent tubes circular hole line of centres; Earlier circular hole pipe and bag stone layer pipe in the assembling, putting into behind the gravel again in the circular hole, row is inserted in outer circular hole layer; Calibration location back is with the three layers of pipe of a pressing screen casing that expand, be adjacent to be press-fitted and be combined into one mutually.
5. expanding process that utilizes the described petroleum horizontal well expansion sand control screen device of claim 1, it is characterized in that it is to comprise the steps: with drilling rod screen casing to be sent behind the horizontal well bottom, inject water under high pressure by the drilling rod interstitial hole, the bay supercharging, slide block begins to move to right, prop the lance pawl by connecting rod, when slide block contact locating piece, then motion stops, and this moment is because lance location, ground, the horizontal case right-hand member is fixed, the head that then promotes to expand when continuing to pressurize is moved to the left, and runs into screen casing when shifting out the bay section, the expansion of screen casing hole enlargement mesh, then the pressure demonstration is fallen suddenly, begin upwards drawing drilling rod this moment, help through turning around a curve by sliding pearl pipe box, the pulling drilling rod moves to left, parrel truck has reduced the resistance that drilling rod is crossed bend, and head distending screen casing in the process that is moved to the left expands.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710059720 CN101126311B (en) | 2007-09-19 | 2007-09-19 | Petroleum horizontal well expansion sand control screen device and expansion technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710059720 CN101126311B (en) | 2007-09-19 | 2007-09-19 | Petroleum horizontal well expansion sand control screen device and expansion technique |
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| CN101126311B true CN101126311B (en) | 2013-09-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7841409B2 (en) * | 2008-08-29 | 2010-11-30 | Halliburton Energy Services, Inc. | Sand control screen assembly and method for use of same |
| CN101701513B (en) * | 2009-11-04 | 2013-08-07 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Drilling-plug free tubular column with sand control and well cementation for open-hole horizontal well |
| CN101994500B (en) * | 2010-10-13 | 2013-08-07 | 刘文西 | Expansion support horizontal screen pipe device and using method thereof |
| CN104265222A (en) * | 2014-09-17 | 2015-01-07 | 中国石油天然气股份有限公司 | Hydraulic expansion cone capable of realizing self-constriction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343965A (en) * | 1992-10-19 | 1994-09-06 | Talley Robert R | Apparatus and methods for horizontal completion of a water well |
| US6263972B1 (en) * | 1998-04-14 | 2001-07-24 | Baker Hughes Incorporated | Coiled tubing screen and method of well completion |
| CN1804365A (en) * | 2005-12-14 | 2006-07-19 | 刘文西 | Expansion pipe device for oilfield well completion |
| CN1973111A (en) * | 2004-06-25 | 2007-05-30 | 国际壳牌研究有限公司 | Screen for controlling sand production in a wellbore |
-
2007
- 2007-09-19 CN CN 200710059720 patent/CN101126311B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343965A (en) * | 1992-10-19 | 1994-09-06 | Talley Robert R | Apparatus and methods for horizontal completion of a water well |
| US6263972B1 (en) * | 1998-04-14 | 2001-07-24 | Baker Hughes Incorporated | Coiled tubing screen and method of well completion |
| CN1973111A (en) * | 2004-06-25 | 2007-05-30 | 国际壳牌研究有限公司 | Screen for controlling sand production in a wellbore |
| CN1804365A (en) * | 2005-12-14 | 2006-07-19 | 刘文西 | Expansion pipe device for oilfield well completion |
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Effective date of registration: 20170815 Address after: 300072 Tianjin University Nankai District Xinyuan village in Tianjin city 19-2804 Patentee after: TIANJIN GUANLIBO PETROLEUM TECHNOLOGY Co.,Ltd. Address before: 300072 Tianjin University Nankai District Xinyuan village in Tianjin city 19-2804 Patentee before: Liu Wenxi |
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Effective date of registration: 20230413 Granted publication date: 20130918 |