CN112814611B - Integrated soluble bridge plug - Google Patents
Integrated soluble bridge plug Download PDFInfo
- Publication number
- CN112814611B CN112814611B CN202110006643.7A CN202110006643A CN112814611B CN 112814611 B CN112814611 B CN 112814611B CN 202110006643 A CN202110006643 A CN 202110006643A CN 112814611 B CN112814611 B CN 112814611B
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- CN
- China
- Prior art keywords
- liquid
- pipe
- spring
- bridge plug
- separation blade
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- 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.)
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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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
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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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
Abstract
The invention discloses an integrated soluble bridge plug, which relates to the technical field of oil wells, and particularly relates to an integrated soluble bridge plug. This soluble bridging plug of integral type, through the inside activity at the left end pipe cup jointed interior liquid sealing pipe, including the left end of liquid sealing spring connect interior liquid sealing spring, the left side of liquid sealing spring is connected with the liquid sealing piece in making, the diameter value that makes the liquid sealing piece is greater than the diameter value of separation blade, when using, liquid by the left side flow direction of leading to liquid pipe can promote the liquid sealing piece right, make liquid sealing piece and separation blade closed, and then realize sealing the effect of leading to the liquid pipe, the effect that plays the liquid sealing avoids the motion instability of soluble ball.
Description
Technical Field
The invention relates to the technical field of oil wells, in particular to an integrated soluble bridge plug.
Background
The bridge plug is used for oil and gas well sealing, has the characteristics of few construction procedures, short period and accurate clamping and sealing position, and is divided into a permanent bridge plug and a removable bridge plug. The cable or the pipe column is used for conveying the sealing rubber sleeve to a preset position of a shaft, pressure generated by gunpowder blasting, hydraulic setting or mechanical setting tools acts on the upper slip, tension acts on the tension rod, the upper cone and the lower cone apply upper pressing and lower pulling forces on the sealing rubber sleeve, when the tension reaches a certain value, the tension rod is broken, and the setting tools are separated from the bridge plug. At the moment, the locking device on the central pipe of the bridge plug plays a role, the upper slips and the lower slips are crushed and embedded on the inner wall of the casing pipe, and the rubber cylinder expands and seals to complete setting.
Some problems can exist in the use of current soluble bridge plug, at first just current bridge plug utilizes the soluble ball to seal in the use usually, place the bridge plug in suitable position after, through putting down the soluble ball, in the in-process that the soluble ball was put down, it can move to the bridge plug anterior segment to be difficult to guarantee soluble ball, probably soluble ball can block in the blasting gap of bridge plug anterior segment, and current bridge plug's fixed mode also has some risks, the firm phenomenon of fixed part can appear, lead to the result of bridge plug's result of use not good enough, for this reason, we propose an integral type soluble bridge plug.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides an integral soluble bridge plug that solves the problems set forth in the background art above.
In order to achieve the purpose, the invention is realized by the following technical scheme: an integrated soluble bridge plug comprises a right end pipe, wherein a fixing ring is fixedly installed on the left side of the right end pipe, a fixing groove is formed in the fixing ring, a fixing piece is movably installed in the fixing groove, a fixing ring is fixedly sleeved in the inner cavity of the fixing ring, a pushing cone is sleeved in the inner cavity of the fixing ring, a left end pipe is fixedly connected on the left side of the fixing ring, a liquid passing pipe is arranged in the inner cavity of the left end pipe, an inner liquid sealing pipe is sleeved in the inner activity of the liquid passing pipe, a supporting bar is fixedly sleeved in the inner part of the inner liquid sealing pipe, a separation blade positioned on the left side of the supporting bar is fixedly sleeved in the inner part of the inner liquid sealing pipe, an inner liquid sealing spring is fixedly connected on the left side of the supporting bar, a liquid sealing sheet is fixedly connected on the left side of the inner liquid sealing spring, a rubber sheet fixing ring is sleeved in the outer part of the left end pipe, a movable ring is sleeved in the outer part of the left end pipe, the left side fixedly connected with connecting strip of activity ring, the left side fixed mounting of connecting strip has outer spring housing, the inside activity of outer spring housing has cup jointed interior spring housing, the inner chamber fixed mounting of outer spring housing has supporting spring, the outside fixedly connected with sheet rubber of left end pipe.
Optionally, the separation blade is located the left side of support bar, interior liquid seal spring extends to the left side of separation blade left side, the inboard of separation blade and interior liquid seal spring's the outside contactless.
Optionally, the separation blade is the annular, the external diameter value of sealing the liquid piece is greater than the internal diameter value of separation blade, seal the left side that the liquid piece is located the separation blade.
Optionally, the outside of propelling movement awl is laminated with the inboard of logical liquid pipe, the right side of propelling movement awl is the toper, the left side of propelling movement awl is the cylindricality.
Optionally, the stationary blade is fan-shaped slice, a plurality of stationary blades have been cup jointed in solid fixed ring's inside activity, gu fixed ring is the annular, it is located solid fixed ring's left side to push away the awl.
Optionally, the inner spring housing extends downward to the outside of the outer spring housing, the top end of the supporting spring is fixedly connected with the top wall of the inner cavity of the outer spring housing, and the bottom end of the supporting spring is fixedly connected with the bottom wall of the inner cavity of the outer spring housing.
Optionally, the left side of the outer spring housing and the left side of the left end pipe are located on a vertical plane, and the bottom end of the connecting strip is attached to the inner wall of the oil pipe.
Optionally, the inner diameter value of the liquid passing pipe is the same as the outer diameter value of the inner liquid sealing pipe and the outer diameter value of the pushing cone and the fixing ring.
The invention provides an integrated soluble bridge plug, which has the following beneficial effects:
1. this soluble bridging plug of integral type, liquid sealing pipe in having cup jointed through the inside activity at the left end pipe, the fixed cover in inside of liquid sealing pipe has connect support bar and separation blade in making, make the support bar be located the right-hand member of separation blade, liquid sealing spring in the left end of liquid sealing spring is connected, the left side of liquid sealing spring is connected with the sealing liquid piece in making, the diameter value that makes the sealing liquid piece is greater than the diameter value of separation blade, when using, liquid by the left side flow direction of leading to liquid pipe can promote the sealing liquid piece right, make sealing liquid piece and separation blade closed, and then realize sealing the effect of leading to the liquid pipe, the effect that plays the sealing liquid avoids the motion unstability of soluble ball.
2. This soluble bridging plug of integral type, the fixed slot has been seted up through the inside at solid fixed ring, make stationary blade movable mounting in the inside of fixed slot, it has solid fixed ring to fix the cover at solid fixed ring's inner chamber simultaneously, make solid fixed ring's left side movable mounting have the propelling movement awl, the convenience will promote the awl through interior envelope pipe and promote right movement when using, make the propelling movement awl drive stationary blade outwards movement, the outside and the contact of oil pipe inner wall that make the stationary blade, the frictional force of be convenient for improve device and oil pipe wall through the design of a plurality of stationary blades, it is more firm to make device and oil pipe inner wall fixed. .
3. This soluble bridging plug of integral type, there is solid fixed ring of sheet rubber through the outside fixed mounting at the left end pipe, movable ring and sheet rubber have been cup jointed in the outside activity of left end pipe simultaneously, make the left connecting strip of movable ring extend to the left side of left end pipe and be connected with outer spring housing and interior spring housing in the left side of connecting strip simultaneously, make supporting spring fixed mounting in the inside of outer spring housing and interior spring housing, the convenience is through pulling the connecting strip left when using, make the connecting strip warp the sheet rubber pressfitting, it is fixed with the sheet rubber through outer spring housing and interior spring housing and supporting spring simultaneously, the convenience is sealed the oil pipe inner wall when using, it is not good to prevent the closed effect, influence subsequent use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic view of the inner liquid-sealing tube of the present invention;
FIG. 4 is a schematic view of the fastening sheet of the present invention;
fig. 5 is a schematic structural view of the inner spring housing of the present invention.
In the figure: 1. a right end tube; 2. an inner liquid sealing pipe; 3. a supporting strip; 4. an inner sealing liquid spring; 5. a baffle plate; 6. sealing the liquid sheet; 7. a fixing ring; 8. fixing grooves; 9. a fixing sheet; 10. a fixing ring; 11. pushing the cone; 12. a left end tube; 13. a liquid pipe is communicated; 14. a movable ring; 15. a connecting strip; 16. an outer spring housing; 17. an inner spring housing; 18. a support spring; 19. a rubber sheet fixing ring; 20. a rubber sheet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 5, the present invention provides a technical solution: an integrated soluble bridge plug comprises a right end pipe 1, a fixing ring 7 is fixedly installed on the left side of the right end pipe 1, a fixing groove 8 is formed in the fixing ring 7, a fixing piece 9 is movably installed in the fixing groove 8, the fixing piece 9 is in a fan-shaped sheet shape, a plurality of fixing pieces 9 are movably sleeved in the fixing ring 7, the fixing ring 10 is in an annular shape, a pushing cone 11 is located on the left side of the fixing ring 10, the pushing cone 11 plays a role in triggering and supporting the fixing piece 9, before the soluble bridge plug is used, the friction force between the device and the inner wall of an oil pipe is large, the device is difficult to move on the inner wall of the oil pipe, the fixing piece 9 is located in the fixing ring 7 before the soluble bridge plug is used, the fixing ring 10 plays a role in blocking the pushing cone 11, an inner liquid sealing pipe 2 pushes the pushing cone 11 rightwards when the soluble bridge plug is used, all the fixing pieces 9 are extruded outwards to the outer portion of the fixing ring 7 by the pushing cone 11 and are in contact with the inner wall of the oil pipe, the pushing cone 11 can be blocked by the fixing ring 10, the fixing ring 10 is fixedly sleeved in the inner cavity of the fixing ring 7, the pushing cone 11 is movably sleeved in the inner cavity of the fixing ring 7, the outer side of the pushing cone 11 is attached to the inner side of the liquid through pipe 13, the right side of the pushing cone 11 is conical, the left side of the pushing cone 11 is cylindrical, the conical shape on the right side of the pushing cone 11 facilitates outwards pushing the fixing plate 9 in the process that the pushing cone 11 moves rightwards, the fixing plate 9 is convenient to trigger, when the fixing plate 9 moves outwards, the supporting of the fixing plate 9 can be achieved through the cylindrical shape on the left end of the pushing cone 11, the outer side of the pushing cone 11 is attached to the inner side of the liquid through pipe 13, the friction force of the fixing plate 9 is convenient to ensure to be large, the left side of the fixing ring 7 is fixedly connected with the left end pipe 12, the liquid through pipe 13 is arranged in the inner cavity of the left end pipe 12, the inner diameter value of the liquid through pipe 13 is the same as the outer diameter value of the inner liquid sealing pipe 2 and the outer diameter value of the pushing cone 11 is the same as the fixing ring 10, the inner liquid sealing tube 2 plays a role in sealing liquid, the inner liquid sealing is conveniently completed through the matching of the inner liquid sealing tube 2, the blocking piece 5 and the liquid sealing sheet 6 when the device is used, the sliding phenomenon is more firmly prevented when the device is used through the matching of the pushing cone 11 and the fixing ring 10, the inner liquid sealing tube 2 is movably sleeved in the inner liquid passing tube 13, the support bar 3 is fixedly sleeved in the inner part of the inner liquid sealing tube 2, the blocking piece 5 is positioned on the left side of the support bar 3, the inner liquid sealing spring 4 extends to the left side of the blocking piece 5, the inner side of the blocking piece 5 is not in contact with the outer side of the inner liquid sealing spring 4, the inner liquid sealing spring 4 is pushed to the right by the liquid sealing sheet 6 after the liquid passing in the oil tube is used, the inner liquid sealing spring 4 is in a compression state, then the liquid sealing sheet 6 can complete the liquid sealing process through the blocking piece 5, the support bar 3 plays a role in supporting the support bar 3, the inner liquid sealing spring 4 can be supported through the role in the use, the inner sealing liquid spring 4 is prevented from being continuously pushed rightwards, the inner part of the inner sealing liquid pipe 2 is fixedly sleeved with the separation blade 5 positioned on the left side of the support bar 3, the left side of the support bar 3 is fixedly connected with the inner sealing liquid spring 4, the left side of the inner sealing liquid spring 4 is fixedly connected with the sealing liquid sheet 6, the separation blade 5 is annular, the outer diameter value of the sealing liquid sheet 6 is larger than the inner diameter value of the separation blade 5, the sealing liquid sheet 6 is positioned on the left side of the separation blade 5, the sealing liquid sheet 6 plays a role of matching with the separation blade 5 to complete inner sealing liquid, when in use, liquid is injected into the oil pipe, the liquid flows rightwards through the liquid through pipe 13 after flowing into the inner part of the left end pipe 12, the liquid can push the sealing liquid sheet 6 rightwards, the sealing liquid sheet 6 compresses the separation blade 5, the sealing liquid sheet 6 and the separation blade 5 are sealed, the sealing liquid in the device, the outer part of the left end pipe 12 is fixedly sleeved with the rubber sheet fixing ring 19, the outer part of the left end pipe 12 is movably sleeved with the movable ring 14, the left side of the movable ring 14 is fixedly connected with a connecting strip 15, the left side of the connecting strip 15 is fixedly provided with an outer spring sleeve 16, the left side of the outer spring sleeve 16 and the left side of the left end pipe 12 are positioned on the same vertical plane, the bottom end of the connecting strip 15 is attached to the inner wall of the oil pipe, the connecting strip 15 plays a role of connecting the movable ring 14 and the outer spring sleeve 16, when the oil pipe is used, the connecting strip 15 is pulled to enable the connecting strip 15 to pull the outer spring sleeve 16 to the outer side of the left end pipe 12, the inner spring sleeve 17 can be clamped with the left end pipe 12, the connecting strip 15 drives the movable ring 14 to move leftwards, the rubber sheet 20 can be compressed when the movable ring 14 moves, the rubber sheet 20 can fill the outer part of the whole bridge plug, the outer part of the bridge plug is attached to the inner wall of the oil pipe to seal the oil pipe, the inner spring sleeve 17 is movably sleeved in the outer spring sleeve 16, the inner cavity of the outer spring sleeve 16 is fixedly provided with a supporting spring 18, the inner spring housing 17 extends downwards to the outside of the outer spring housing 16, the top end of the supporting spring 18 is fixedly connected with the top wall of the inner cavity of the outer spring housing 16, the bottom end of the supporting spring 18 is fixedly connected with the bottom wall of the inner cavity of the outer spring housing 16, when the outer spring housing 16 extends out from the left side of the left end pipe 12, the supporting spring 18 inside the outer spring housing 16 can be changed from a compression state to an extension state, the inner spring housing 17 can send the inside of the outer spring housing 16 to extend out, and the outside of the left end pipe 12 is fixedly connected with a rubber sheet 20.
In conclusion, when the integrated soluble bridge plug is used, firstly, the bridge plug is sent to a proper position through a pipe column, then when the left end pipe 12 is abutted through the pipe column, the connecting strip 15 is pulled, the connecting strip 15 pulls the outer spring sleeve 16 to the outer part of the left side of the left end pipe 12, the supporting spring 18 in the outer spring sleeve 16 is changed from a compressed state to an extended state, the inner spring sleeve 17 is sent to the inner part of the outer spring sleeve 16 to extend out to be clamped with the left end pipe 12, meanwhile, the connecting strip 15 drives the movable ring 14 to move leftwards, the rubber sheet 20 is compressed when the movable ring 14 moves, the rubber sheet 20 is used for filling the whole bridge plug to the outer part, the outer part of the bridge plug is attached to the inner wall of the oil pipe to seal the oil pipe, then liquid is injected into the oil pipe, the liquid flows rightwards through the liquid pipe 13 after flowing to the inner part of the left end pipe 12, the liquid pushes the liquid sealing sheet 6 rightwards, the liquid sealing sheet 5 is compressed, make the sealing liquid piece 6 and separation blade 5 seal up, realize the inside sealing liquid of device, liquid can promote whole interior sealing liquid pipe 2 and remove right afterwards, sealing liquid pipe 2 can promote the propelling movement awl 11 and move right in the in-process that removes, the propelling movement awl 11 can be promoted to the left side of solid fixed ring 10, at the in-process of solid fixed ring 10 left motion, gu fixed ring 10 can promote stationary blade 9 to the outside of fixed slot 8, make stationary blade 9 and oil pipe's inner wall laminating, it is fixed with the inner wall, fix the device, can.
Claims (7)
1. An integral soluble bridge plug comprising a right end tube (1), characterized in that: the left side fixed mounting of right-hand member pipe (1) has solid fixed ring (7), fixed slot (8) have been seted up to the inside of solid fixed ring (7), the inside movable mounting of fixed slot (8) has stationary blade (9), the fixed cover of inner chamber of solid fixed ring (7) has solid fixed ring (10), the inner chamber activity of solid fixed ring (7) has cup jointed the promotion awl (11), the left side fixedly connected with left end pipe (12) of solid fixed ring (7), the inner chamber of left end pipe (12) has seted up liquid pipe (13), the inside activity of liquid pipe (13) has cup jointed interior liquid sealing pipe (2), the inside fixed of interior liquid sealing pipe (2) has cup jointed support bar (3), the inside fixed cup joint of interior liquid sealing pipe (2) has separation blade (5) that is located the left of support bar (3), there is liquid sealing spring (4) to pass in separation blade (5), the right-hand member of interior liquid sealing spring (4) and the left side fixed connection of support bar (3), the left side fixedly connected with of interior liquid seal spring (4) seals liquid piece (6), the fixed ring of rubber piece (19) has been cup jointed to the external fixation of left end pipe (12), the outside activity of left end pipe (12) has been cup jointed activity ring (14), the left side fixedly connected with connecting strip (15) of activity ring (14), the left side fixed mounting of connecting strip (15) has outer spring housing (16), the inside activity of outer spring housing (16) has been cup jointed interior spring housing (17), the inner chamber fixed mounting of outer spring housing (16) has supporting spring (18), the outside fixedly connected with rubber piece (20) of left end pipe (12).
2. An integral soluble bridge plug according to claim 1, wherein: separation blade (5) are located the left side of support bar (3), interior seal liquid spring (4) extend to the left side of separation blade (5) left side, the inboard of separation blade (5) and the outside contactless of interior seal liquid spring (4).
3. An integral soluble bridge plug according to claim 1, wherein: the separation blade (5) is annular, the external diameter value of sealing liquid piece (6) is greater than the internal diameter value of separation blade (5), seal liquid piece (6) and be located the left side of separation blade (5).
4. An integral soluble bridge plug according to claim 1, wherein: the outside of propelling movement awl (11) is laminated with the inboard of logical liquid pipe (13), the right side of propelling movement awl (11) is the toper, the left side of propelling movement awl (11) is the cylindricality.
5. An integral soluble bridge plug according to claim 1, wherein: stationary blade (9) are fan-shaped slice, a plurality of stationary blades (9) have been cup jointed in the inside activity of solid fixed ring (7), gu fixed ring (10) is the annular, it is located the left side of solid fixed ring (10) to promote awl (11).
6. An integral soluble bridge plug according to claim 1, wherein: the inner spring sleeve (17) extends downwards to the outside of the outer spring sleeve (16), the top end of the supporting spring (18) is fixedly connected with the top wall of the inner cavity of the outer spring sleeve (16), and the bottom end of the supporting spring (18) is fixedly connected with the bottom wall of the inner cavity of the outer spring sleeve (16).
7. An integral soluble bridge plug according to claim 1, wherein: the inner diameter value of the liquid through pipe (13) is the same as the outer diameter value of the inner liquid sealing pipe (2) and the outer diameter values of the pushing cone (11) and the fixing ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110006643.7A CN112814611B (en) | 2021-01-05 | 2021-01-05 | Integrated soluble bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110006643.7A CN112814611B (en) | 2021-01-05 | 2021-01-05 | Integrated soluble bridge plug |
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| Publication Number | Publication Date |
|---|---|
| CN112814611A CN112814611A (en) | 2021-05-18 |
| CN112814611B true CN112814611B (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110006643.7A Active CN112814611B (en) | 2021-01-05 | 2021-01-05 | Integrated soluble bridge plug |
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| CN (1) | CN112814611B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205638343U (en) * | 2016-05-18 | 2016-10-12 | 李鹏远 | Drilling engineering prevents junk device |
| CN106761540A (en) * | 2017-01-04 | 2017-05-31 | 廊坊开发区森德石油设备有限公司 | A kind of optional position is two-way to set bridging plug |
| CN110259413A (en) * | 2019-07-03 | 2019-09-20 | 中国石油天然气集团有限公司 | A kind of solvable bridge plug of integral type and preparation method thereof |
| CN110374549A (en) * | 2019-07-31 | 2019-10-25 | 陕西海格瑞恩实业有限公司 | A kind of solvable big orifice bridge plug of all-metal dual-grip |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7806177B2 (en) * | 2009-01-28 | 2010-10-05 | Baker Hughes Incorporated | Retractable downhole backup assembly for circumferential seal support |
| US10006264B2 (en) * | 2014-05-29 | 2018-06-26 | Weatherford Technology Holdings, Llc | Whipstock assembly having anchor and eccentric packer |
-
2021
- 2021-01-05 CN CN202110006643.7A patent/CN112814611B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205638343U (en) * | 2016-05-18 | 2016-10-12 | 李鹏远 | Drilling engineering prevents junk device |
| CN106761540A (en) * | 2017-01-04 | 2017-05-31 | 廊坊开发区森德石油设备有限公司 | A kind of optional position is two-way to set bridging plug |
| CN110259413A (en) * | 2019-07-03 | 2019-09-20 | 中国石油天然气集团有限公司 | A kind of solvable bridge plug of integral type and preparation method thereof |
| CN110374549A (en) * | 2019-07-31 | 2019-10-25 | 陕西海格瑞恩实业有限公司 | A kind of solvable big orifice bridge plug of all-metal dual-grip |
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| CN112814611A (en) | 2021-05-18 |
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| CB03 | Change of inventor or designer information |
Inventor after: Liu Hanbing Inventor after: Bai Fan Inventor after: Wang Songnan Inventor after: Sun Shufang Inventor before: Sun Shufang |
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Effective date of registration: 20210812 Address after: 163000 Business Service Building A11, North Public Construction Area, Chengfengzhuang South Second Road, Jeanhu Road District, Daqing City, Heilongjiang Province, 9 Applicant after: DAQING DANFENG PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 156500 group 2, Yong'an village, Haiqing Township, Fuyuan City, Shuangyashan City, Heilongjiang Province Applicant before: Sun Shufang |
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