CN105822268A - Horizontal well completion pipe string for middle-shallow reservoir - Google Patents
Horizontal well completion pipe string for middle-shallow reservoir Download PDFInfo
- Publication number
- CN105822268A CN105822268A CN201610359003.3A CN201610359003A CN105822268A CN 105822268 A CN105822268 A CN 105822268A CN 201610359003 A CN201610359003 A CN 201610359003A CN 105822268 A CN105822268 A CN 105822268A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- sliding sleeve
- upper sliding
- casing pipe
- horizontal well
- 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.)
- Pending
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Classifications
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
Abstract
The invention discloses a horizontal well completion pipe string for a middle-shallow reservoir. The horizontal well completion pipe string comprises a casing pipe, and two floating couplings are arranged on the horizontal section of the casing pipe. Each floating coupling comprises a shell, an upper sliding sleeve and a lower sliding sleeve, wherein the upper sliding sleeve is composed of a communicating part and a shear part, the shear part is supported by the upper section of the inner wall of the shell through an upper shear nail, the lower sliding sleeve is supported by the lower section of the inner wall of the shell through a lower shear nail, and the communicating part is arranged in the lower sliding sleeve and provided with a discharge hole; an annular flow-stabilizing groove is formed in the upper end face of the shear part, and the width of the flow-stabilizing groove is gradually decreased upwards in the axial direction of the shear part. By additionally arranging the floating couplings on the casing pipe, the casing pipe is kept to be filled with air; due to the fact that the section, below the floating couplings, in the casing pipe is filled with air, after the section of the casing pipe enters a horizontal well section, the gravity acting on the a horizontal well wall is reduced, the frictional force between the casing pipe and the well wall is reduced accordingly, the thrust pushing the casing pipe to move ahead is also reduced, the horizontal section cementing quality can be improved, and it is beneficial for the casing pipe to be driven to a designed position.
Description
Technical field
The present invention relates to field of petroleum exploitation, specifically refer to the horizontal well completion tubular pile for middle-shallow layer oil reservoir.
Background technology
The feature of extended horizontal well completion is High angle, long open hole, hold angle well segment length, in the case of hole angle is higher, casing string is close to the lower borehole wall, enter horizontal segment rear enclosure tubing string can be attached to completely on the lower borehole wall, now casing string is the longest with the contact-segment on stratum, casing string then bears a heavy burden and lies on the horizontal segment borehole wall, stratum is the biggest to the frictional resistance of casing string, even can not be lower to shaft bottom by deadweight, need pressurization ability slide downward, and easily lead to casing string flexing, even it is likely to cause casing string to be stuck in the bending section of well because rigid casing is very big and cannot enter down.Casing string is big due to the frictional resistance being subject to, and casing string tends not to the most lower to precalculated position, is delayed construction speed, affects follow-up oil recovery effect, even cause the serious consequence that well is scrapped.
Summary of the invention
It is an object of the invention to provide the horizontal well completion tubular pile for middle-shallow layer oil reservoir, can enough make screen casing post transfer to design attitude smoothly, reduce sleeve pipe and moving horizontally the abrasion of process.
The purpose of the present invention is achieved through the following technical solutions:
Horizontal well completion tubular pile for middle-shallow layer oil reservoir, including the sleeve pipe being placed in well, the horizontal segment of described sleeve pipe is provided with two floating couplings, described floating coupling includes housing, upper sliding sleeve and low sleeve, upper sliding sleeve is made up of the cut part that interconnective interconnecting part and external diameter are identical with housing inner diameter, cut part is supported on inner walls epimere by upper shearing nail, low sleeve is supported on inner walls hypomere by down cut nail, described interconnecting part is placed in low sleeve, and on interconnecting part, have discharge orifice, when upper shearing nail is not cut off, discharge orifice is sealed by low sleeve, when upper shearing nail is cut off, upper sliding sleeve moves along housing axis direction, until upper sliding sleeve upper space connects with low sleeve lower space；The stable chute of annular, the curved shape of bottom land concave downward of described stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute is had in upper surface, described cut part.
For in prior art, technique is easily caused below the tubing string of the horizontal well completion of big displacement casing string flexing, even it is likely to cause casing string to be stuck in the bending section of well because rigid casing is very big and cannot enter down, inventor is by adding multiple floating coupling on sleeve pipe, make the not drilling fluid charge of the sleeve pipe between two floating couplings, remain full of air, drilling fluid is filled in sleeve pipe more than floating coupling, it is full of air owing to being positioned at the sleeve pipe of below floating coupling, after this section of sleeve pipe enters net horizontal section, the gravity acting on the horizontal borehole wall alleviates, frictional force between sleeve pipe and the borehole wall reduces therewith, the thrust promoting sleeve pipe to move ahead also reduces, thus help the section of improving the standard cementing quality, be conducive under sleeve pipe to design attitude；To after design attitude under sleeve pipe, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe, upper shearing nail in fixing inner walls is cut off, upper sliding sleeve is descending, discharge orifice moves the interior bottom of low sleeve, and at this moment the liquid in sleeve pipe more than floating coupling enters in setting of casing from discharge orifice, thus realizes the free-flowing of whole casing string internal channel fluid.
Wherein upper sliding sleeve is made up of with interconnecting part cut part, cut part is connected with inner walls by upper nail of shearing, when drilling fluid is directly impacted to cut part by epimere sleeve pipe, upper surface, cut part by instantaneous impulse affected bigger, and the applied stress skewness that this instantaneous impulse produces, i.e. it is easily caused upper surface, cut part and stress raisers occur, and upper nail of shearing there will be more significantly burr because of unbalance stress after cutting off, inner walls can be caused serious cut with upper sliding sleeve when this burr can move, and then weaken the floating coupling airtight performance to sleeve pipe, the air in sleeve pipe is caused to leak, casing string cannot be met during lower section, alleviate the function of deadweight；The present invention has annular constant-current groove on the upper surface of cut part, and the curved shape of bottom land concave downward of stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute, make drilling fluid by sleeve pipe enter in upper sliding sleeve time, it is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute annularly, the applied stress that local on upper surface, cut part is produced by thump is shared to whole end face, make cut part section of formation rule when separating with enclosure interior, obvious burr and crimping will not be produced, reduce when later stage upper sliding sleeve moves in the lump with low sleeve and wear and tear to produced by internal surface of sleeve pipe；And, after drilling fluid flows into stable chute, after it is altered course by the depression of circular arc bottom stable chute, drilling fluid begins to move up, and the successively decreasing axially upwards along cut part of the vertical interval between the two side of stable chute, i.e. reversely the drilling fluid of movement constantly can rebound on stable chute sidewall, radially produces certain applied stress in cut part simultaneously, and this applied stress to shear the impact followed closely negligible on upper.
Being provided with sealing ring on the sidewall of described upper sliding sleeve hypomere, described sealing ring realizes the sealing between upper sliding sleeve hypomere and low sleeve hypomere inwall.The sealing ring installed can ensure that the space between two floating couplings adjacent during the lower section of casing string is seamless, utilize the density contrast between air and well eye fluids, realize alleviating the purpose of casing string deadweight, to facilitate casing string movement on net horizontal section.
Gap is left between described low sleeve hypomere external diameter and lower housing section inwall.After building the pressure in casing string, drill-in fluid drives plug to force upper sliding sleeve at set in-pipe together with low sleeve, for reducing upper sliding sleeve and low sleeve abrasion on internal surface of sleeve pipe further, it is provided with gap between low sleeve hypomere external diameter and lower housing section inwall, the hypomere of low sleeve plays guide function in sleeve pipe simultaneously, the two ends of housing arrange external screw thread and are connected with casing threads, now, annular space between low sleeve hypomere outer wall and internal surface of sleeve pipe, even if the radial missing that i.e. low sleeve is certain with the upper sliding sleeve mobile generation in sleeve pipe, also it is not result between its end and internal surface of sleeve pipe being formed serious abrasion, ensure that low sleeve moves forward under the promotion of plug smoothly with upper sliding sleeve.
The groove depth of described stable chute is 0.7 ~ 0.8 times of described cut part axial length.Be arranged on the stable chute on upper surface, cut part can not only balanced drilling liquid to the impact effect of each point on upper surface, cut part, moreover it is possible to weaken cut part fracture strength, i.e. build the pressure reach standard value after can quickly realize shear；As preferably, the groove depth of stable chute is set to 0.7 ~ 0.8 times of cut part axial length so that cut part, on the premise of ensureing that interconnecting part is stably supported by it, reduces the fracture strength of cut part simultaneously, facilitates the THE ADIABATIC SHEAR IN of upper sliding sleeve.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, to after design attitude under middle sleeve of the present invention, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe, upper shearing nail in fixing inner walls is cut off, upper sliding sleeve is descending, discharge orifice moves the interior bottom of low sleeve, and at this moment the liquid in sleeve pipe more than floating coupling enters in setting of casing from discharge orifice, thus realizes the free-flowing of whole bunch tube internal channel fluid；
2, the present invention has annular constant-current groove on the upper surface of cut part, and the curved shape of bottom land concave downward of stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute, make drilling fluid by sleeve pipe enter in upper sliding sleeve time, it is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute annularly, the applied stress that local on upper surface, cut part is produced by thump is shared to whole end face, make cut part section of formation rule when separating with enclosure interior, obvious burr and crimping will not be produced, reduce when later stage upper sliding sleeve moves in the lump with low sleeve and wear and tear to produced by internal surface of sleeve pipe；
3, the present invention is provided with gap between low sleeve hypomere external diameter and lower housing section inwall, the hypomere of low sleeve plays guide function in sleeve pipe simultaneously, the two ends of housing arrange external screw thread and are connected with casing threads, now, annular space between low sleeve hypomere outer wall and internal surface of sleeve pipe, even if the radial missing that i.e. low sleeve is certain with the upper sliding sleeve mobile generation in sleeve pipe, also it is not result between its end and internal surface of sleeve pipe being formed serious abrasion, it is ensured that low sleeve moves forward under the promotion of plug smoothly with upper sliding sleeve.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the structural representation of floating coupling.
Labelling and corresponding parts title in accompanying drawing:
Nail, 35-discharge orifice, 36-sealing ring, 37-down cut nail, 38-low sleeve is sheared on 1-sleeve pipe, 2-well, 3-floating coupling, 31-housing, 32-upper sliding sleeve, 33-stable chute, 34-.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1
nullAs depicted in figs. 1 and 2，The present embodiment includes the sleeve pipe 1 being placed in well 2，The horizontal segment of described sleeve pipe 1 is provided with two floating couplings 3，Described floating coupling 3 includes housing 31、Upper sliding sleeve 32 and low sleeve 38，Upper sliding sleeve 32 is made up of the cut part that interconnective interconnecting part is identical with housing 31 internal diameter with external diameter，Cut part is supported on housing 31 inwall epimere by upper nail 34 of shearing，Low sleeve 38 is supported on housing 31 inwall hypomere by down cut nail 37，Described interconnecting part is placed in low sleeve 38，And on interconnecting part, have discharge orifice 35，When upper shearing nail 34 is not cut off，Discharge orifice 35 is sealed by low sleeve 38，When upper shearing nail 34 is cut off，Upper sliding sleeve 32 moves along housing 31 axis direction，Until upper sliding sleeve 32 upper space connects with low sleeve 38 lower space；The stable chute 33 of annular, the curved shape of bottom land concave downward of described stable chute 33, and groove width the successively decreasing axially upwards along cut part of stable chute 33 is had in upper surface, described cut part.
For in prior art, technique is easily caused below the tubing string of the horizontal well completion of big displacement sleeve pipe 1 post flexing, even it is likely to cause sleeve pipe 1 post to be stuck in the bending section of well 2 because sleeve pipe 1 rigidity is very big and cannot enter down, inventor is by adding multiple floating coupling 3 on sleeve pipe 1, make the sleeve pipe 1 not drilling fluid charge between two floating couplings 3, remain full of air, drilling fluid is filled in the sleeve pipe 1 of floating coupling more than 3, it is full of air owing to being positioned at the sleeve pipe 1 of floating coupling less than 3, after this section of sleeve pipe 1 enters net horizontal section, the gravity acting on the horizontal borehole wall alleviates, frictional force between sleeve pipe 1 and the borehole wall reduces therewith, the thrust promoting sleeve pipe 1 to move ahead also reduces, thus help the section of improving the standard cementing quality, sleeve pipe is conducive to arrive design attitude 1 time；Sleeve pipe 1 time is to after design attitude, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe 1, upper shearing nail 34 on fixing housing 31 inwall is cut off, upper sliding sleeve 32 is descending, discharge orifice 35 moves the interior bottom of low sleeve 38, and at this moment the liquid in the sleeve pipe 1 of floating coupling more than 3 enters in setting of casing 1 from discharge orifice 35, thus realizes the free-flowing of whole sleeve pipe 1 post internal channel fluid.
Wherein upper sliding sleeve 32 is made up of with interconnecting part cut part, cut part is connected with housing 31 inwall by upper nail 34 of shearing, when drilling fluid is directly impacted to cut part by epimere sleeve pipe 1, upper surface, cut part by instantaneous impulse affected bigger, and the applied stress skewness that this instantaneous impulse produces, i.e. it is easily caused upper surface, cut part and stress raisers occur, and upper nail 34 of shearing there will be more significantly burr because of unbalance stress after cutting off, housing 31 inwall can be caused serious cut when this burr can move with upper sliding sleeve 32, and then weaken the floating coupling 3 airtight performance to sleeve pipe 1, the air in sleeve pipe 1 is caused to leak, sleeve pipe 1 post cannot be met during lower section, alleviate the function of deadweight；The present invention has annular constant-current groove 33 on the upper surface of cut part, and the curved shape of bottom land concave downward of stable chute 33, and groove width the successively decreasing axially upwards along cut part of stable chute 33, make drilling fluid by sleeve pipe 1 enter in upper sliding sleeve 32 time, it is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute 33 annularly, the applied stress that local on upper surface, cut part is produced by thump is shared to whole end face, make cut part with the section of formation rule when separating inside housing 31, obvious burr and crimping will not be produced, reduce when later stage upper sliding sleeve 32 moves in the lump with low sleeve 38 and wear and tear to produced by sleeve pipe 1 inwall；And, after drilling fluid flows into stable chute 33, after it is altered course by the depression of circular arc bottom stable chute 33, drilling fluid begins to move up, and the successively decreasing axially upwards along cut part of the vertical interval between the two side of stable chute 33, i.e. reversely the drilling fluid of movement constantly can rebound on stable chute 33 sidewall, radially produces certain applied stress in cut part simultaneously, and this applied stress on upper shear follow closely 34 impact negligible.
Being provided with sealing ring 36 on the sidewall of described upper sliding sleeve 32 hypomere, described sealing ring 36 realizes the sealing between upper sliding sleeve 32 hypomere and low sleeve 38 hypomere inwall.The sealing ring 36 installed can ensure that the space between two floating couplings 3 adjacent during the lower section of sleeve pipe 1 post is seamless, utilize the density contrast between liquid in air and well 2, realize alleviating the purpose of sleeve pipe 1 post deadweight, to facilitate the movement on net horizontal section of sleeve pipe 1 post.
In the present embodiment, after building the pressure in sleeve pipe 1 post, drill-in fluid drives plug to force upper sliding sleeve 32 to move in sleeve pipe 1 together with low sleeve 38, for reducing upper sliding sleeve 32 and the low sleeve 38 abrasion on sleeve pipe 1 inwall further, it is provided with gap between low sleeve 38 hypomere external diameter and housing 31 hypomere inwall, the hypomere of low sleeve 38 plays guide function in sleeve pipe 1 simultaneously, the two ends of housing 31 arrange external screw thread and threaded with sleeve pipe 1, now, annular space between low sleeve 38 hypomere outer wall and sleeve pipe 1 inwall, even if the radial missing that i.e. low sleeve 38 is certain with the upper sliding sleeve 32 mobile generation in sleeve pipe 1, also it is not result between its end and sleeve pipe 1 inwall forming serious abrasion, ensure that low sleeve 38 moves forward under the promotion of plug smoothly with upper sliding sleeve 32.And the stable chute 33 being arranged on upper surface, cut part can not only balanced drilling liquid to the impact effect of each point on upper surface, cut part, moreover it is possible to weaken cut part fracture strength, i.e. build the pressure reach standard value after can quickly realize shear；As preferably, the groove depth of stable chute 33 is set to 0.7 ~ 0.8 times of cut part axial length so that cut part, on the premise of ensureing that interconnecting part is stably supported by it, reduces the fracture strength of cut part simultaneously, facilitates the THE ADIABATIC SHEAR IN of upper sliding sleeve 32.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (4)
- null1. for the horizontal well completion tubular pile of middle-shallow layer oil reservoir，Including the sleeve pipe (1) being placed in well (2)，It is characterized in that: on the horizontal segment of described sleeve pipe (1), be provided with two floating couplings (3)，Described floating coupling (3) includes housing (31)、Upper sliding sleeve (32) and low sleeve (38)，Upper sliding sleeve (32) is made up of the cut part that interconnective interconnecting part is identical with housing (1) internal diameter with external diameter，Cut part is supported on housing (31) inwall epimere by upper nail (34) of shearing，Low sleeve (38) is supported on housing (31) inwall hypomere by down cut nail (37)，Described interconnecting part is placed in low sleeve (38)，And on interconnecting part, have discharge orifice (35)，When upper shearing nail (34) is not cut off，Discharge orifice (35) is sealed by low sleeve (38)，When upper shearing nail (34) is cut off，Upper sliding sleeve (32) moves along housing (31) axis direction，Until upper sliding sleeve (32) upper space connects with low sleeve (38) lower space；The stable chute (33) of annular, the curved shape of bottom land concave downward of described stable chute (33), and groove width the successively decreasing axially upwards along cut part of stable chute (33) is had in upper surface, described cut part.
- Horizontal well completion tubular pile for middle-shallow layer oil reservoir the most according to claim 1, it is characterized in that: be provided with sealing ring (36) on the sidewall of described upper sliding sleeve (32) hypomere, described sealing ring (36) realizes the sealing between upper sliding sleeve (32) hypomere and low sleeve (38) hypomere inwall.
- Horizontal well completion tubular pile for middle-shallow layer oil reservoir the most according to claim 1, it is characterised in that: leave gap between described low sleeve (38) hypomere external diameter and housing (31) hypomere inwall.
- Horizontal well completion tubular pile for middle-shallow layer oil reservoir the most according to claim 1, it is characterised in that: the groove depth of described stable chute (33) is 0.7 ~ 0.8 times of described cut part axial length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359003.3A CN105822268A (en) | 2016-05-27 | 2016-05-27 | Horizontal well completion pipe string for middle-shallow reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359003.3A CN105822268A (en) | 2016-05-27 | 2016-05-27 | Horizontal well completion pipe string for middle-shallow reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105822268A true CN105822268A (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610359003.3A Pending CN105822268A (en) | 2016-05-27 | 2016-05-27 | Horizontal well completion pipe string for middle-shallow reservoir |
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| Country | Link |
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| CN (1) | CN105822268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567691A (en) * | 2016-10-11 | 2017-04-19 | 中国石油天然气股份有限公司 | Operating method for open-hole and screen-pipe completion and pipe string |
| CN108301788A (en) * | 2018-02-07 | 2018-07-20 | 中国石油集团西部钻探工程有限公司 | Floating coupling device |
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| CN201567960U (en) * | 2009-12-16 | 2010-09-01 | 中国石油集团渤海钻探工程有限公司 | Floating casing pipe installing pipe series |
| CN202266201U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Sleeve floating coupler |
| CN204357368U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Casing float collar |
| CN205100896U (en) * | 2015-10-29 | 2016-03-23 | 江苏航天鸿鹏数控机械有限公司 | Formula case can be bored and coupling is floated |
| CN205778583U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | A kind of horizontal well completion tubular pile |
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2016
- 2016-05-27 CN CN201610359003.3A patent/CN105822268A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201567960U (en) * | 2009-12-16 | 2010-09-01 | 中国石油集团渤海钻探工程有限公司 | Floating casing pipe installing pipe series |
| CN202266201U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Sleeve floating coupler |
| CN204357368U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Casing float collar |
| CN205100896U (en) * | 2015-10-29 | 2016-03-23 | 江苏航天鸿鹏数控机械有限公司 | Formula case can be bored and coupling is floated |
| CN205778583U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | A kind of horizontal well completion tubular pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567691A (en) * | 2016-10-11 | 2017-04-19 | 中国石油天然气股份有限公司 | Operating method for open-hole and screen-pipe completion and pipe string |
| CN106567691B (en) * | 2016-10-11 | 2020-04-10 | 中国石油天然气股份有限公司 | Method of operating an open hole screen and tubular string |
| CN108301788A (en) * | 2018-02-07 | 2018-07-20 | 中国石油集团西部钻探工程有限公司 | Floating coupling device |
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Application publication date: 20160803 |
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