CN108487879B - Oil layer protection well-flushing packer - Google Patents
Oil layer protection well-flushing packer Download PDFInfo
- Publication number
- CN108487879B CN108487879B CN201711386101.7A CN201711386101A CN108487879B CN 108487879 B CN108487879 B CN 108487879B CN 201711386101 A CN201711386101 A CN 201711386101A CN 108487879 B CN108487879 B CN 108487879B
- Authority
- CN
- China
- Prior art keywords
- airtight
- joint
- sleeve
- connector
- threaded connection
- 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.)
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Links
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000004873 anchoring Methods 0.000 claims abstract description 27
- 239000002775 capsule Substances 0.000 claims abstract description 21
- 238000003825 pressing Methods 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
The oil layer protection well flushing packer comprises a central pipe, an upper joint, a lower joint, a control sleeve, a sliding sleeve, a sealing valve, a sealing joint, a capsule, an anchoring structure and a connector, wherein the upper end of the central pipe is connected with the upper joint in a threaded manner, the lower end of the central pipe is sleeved with the lower joint and is kept sealed through a sealing ring, the control sleeve is sleeved outside the upper joint and is kept fixed through a release shear pin, and is kept sealed with the upper joint through the sealing ring; the connector is in threaded connection with the lower connector, the upper end of the airtight sleeve is in threaded connection with the lower end of the control sleeve, and the lower end of the airtight sleeve is in threaded connection with the airtight connector; the sliding sleeve is sleeved outside the central tube and is sleeved in the airtight sleeve, the sliding sleeve is positioned at the lower part of the upper joint, the control shear pin penetrates through the upper joint and is inserted into the sliding sleeve, the other end of the airtight joint is connected with the anchoring mechanism, the other end of the anchoring mechanism is connected with the connector, and the capsule is arranged between the anchoring mechanism and the central tube. The invention has the advantages of good anchoring performance, safety and reliability, and can effectively prolong the service life of the separate-layer water injection pipe column.
Description
Technical Field
The invention relates to a well flushing packer for an underground separate layer water injection pipe column in petroleum exploitation, in particular to an oil layer protection anti-creeping well flushing packer.
Background
In the oil pumping process of the sucker rod oil pump in the oil field, the paraffin deposition of the oil pipe or the blockage of the oil pump by dirt such as sand, scraps and the like is frequently encountered, so that the oil pump cannot normally produce, and the production of the oil pump is usually recovered by adopting a well flushing mode. The well flushing method is that well flushing water is pumped into the oil pipe from the sleeve pipe and returned out to form a circulating well flushing channel to clean the oil well. However, some oil wells are lost due to oil layer leakage, well washing water enters the oil layer after being driven into the oil layer from the casing pipe, does not return from the oil pipe, and cannot achieve the purpose of well washing, well washing water enters the oil layer and also causes pollution of the oil layer, so that the oil well yield is reduced, and even the oil layer is pressed down, so that the oil well cannot produce oil, and great economic loss is generated. To solve this problem, oil fields have developed well-flushing packers to isolate the oil reservoir from the well. The hydraulic compression packer is a packer commonly used for the current oilfield separate-layer water injection pipe column, but in the water injection process, the rubber packing barrel is affected by the temperature and pressure effects in the well, when the working state of the water injection well changes, the rubber packing barrel creeps under the pressure effect or the temperature effect, the sealing effect of the packer is seriously affected, the service life of the packer is shortened, and even the rubber packing barrel is torn to cause the pipe column failure.
Disclosure of Invention
The invention aims to provide an oil layer protection well flushing packer which can improve the anti-creep performance of the packer, has the advantages of good anchoring performance, safety and reliability, and can effectively prolong the service life of a layered water injection pipe.
The aim of the invention is achieved by the following technical scheme:
The invention provides an oil layer protection well flushing packer, which comprises a central pipe, an upper joint, a lower joint, a control sleeve, a sliding sleeve, a sealing valve, a sealing joint, a capsule, an anchoring structure and a connector, wherein the upper end of the central pipe is connected with the upper joint in a threaded manner, the lower end of the central pipe is sleeved with the lower joint and is kept sealed through a sealing ring, the control sleeve is sleeved outside the upper joint and is kept fixed through a shear pin released, and the control sleeve is kept sealed with the upper joint through the sealing ring; the connector is in threaded connection with the lower connector, the upper end of the airtight sleeve is in threaded connection with the lower end of the control sleeve, and the lower end of the airtight sleeve is in threaded connection with the airtight connector; the sliding sleeve is sleeved outside the central tube and is sleeved in the airtight sleeve, the sliding sleeve is positioned at the lower part of the upper joint, the control shear pin penetrates through the upper joint and is inserted into the sliding sleeve, the other end of the airtight joint is connected with the anchoring mechanism, the other end of the anchoring mechanism is connected with the connector, and the capsule is arranged between the anchoring mechanism and the central tube and is in fluid communication with the airtight valve at the lower end of the sliding sleeve.
One end of the capsule is in threaded connection with the airtight joint, and the other end of the capsule is in threaded connection with the baffle ring in the lower joint and is sealed with the lower joint through a sealing ring.
The upper joint is internally provided with a locking block, and a corresponding groove matched with the locking block is arranged in the lower position of the sliding sleeve adjacent to the locking block.
Further, the sealing device is also provided with a clamping ring, the clamping ring is clamped in a chute between the sliding sleeve and the sealing sleeve, and the cross section of the clamping ring is wedge-shaped.
The sealing valve comprises a pressing plate, a ball seat, a sealing valve ball, a sealing spring and a sealing valve seat, wherein one end of the pressing plate is fixed on the sliding sleeve through a fastening screw, the other end of the pressing plate is abutted to the ball seat, a push rod is arranged at the center of the pressing plate, the ball seat is located in the sealing valve seat, one end of the ball seat is plugged by the push rod, the other end of the ball seat is plugged by the valve ball, and the valve ball is located in a channel of the sealing valve seat and connected with the sealing valve seat through the spring.
And a gap is formed between the central tube and the pressing plate, and a pressure inlet hole is formed in the wall of the central tube corresponding to the gap.
The anchoring mechanism is a slip mechanism, the slip mechanism comprises a guard plate, slips, a leaf spring and a slip sleeve, the upper end of the slip sleeve is in threaded connection with the airtight joint, the lower end of the slip sleeve is in threaded connection with the connector, the slips are arranged at the opening of the slip sleeve and are located in grooves of the guard plate, the leaf spring is abutted to the outer side of the slips uniformly along the circumferential surface of the slip sleeve, the guard plate is an elastomer, the upper end of the guard plate is abutted to one end of the airtight joint, and the lower end of the guard plate is abutted to one end of the connector.
The airtight joint and one end of the connector, which is abutted against the guard plate, are wedge-shaped, and the capsule is arranged between the guard plate and the central tube.
The beneficial effects of the invention are as follows: the oil layer protection well flushing packer is a pipe column anti-creeping tool designed according to the characteristic of offshore oilfield separate-layer water injection, and is anchored and locked when the packer is set or injected, so that the packer is in a permanent anchoring state, has the advantages of good anchoring performance, safety and reliability, and can effectively prolong the service life of the separate-layer water injection pipe column.
Drawings
FIG. 1 is a schematic diagram of an oil layer protection well cleanup packer of the present invention.
In the figure: 1-upper joint; 2-a sealing ring; 3-releasing the shear pins; 4-a sealing ring; 5-a control sleeve; 6-controlling the shear pins; 7-locking blocks; 8-locking nails; 9, sealing the sleeve; 10-clamping rings; 11-sliding sleeve; 12-sealing rings; 13-a sealing ring; 14-fastening a screw; 15-pressing plates; 16-ejector rod; 17-a sealing ring; 18-ball seat; 19-a closed valve ball; 20-sealing springs; 21-sealing a valve seat; 22-sealing rings; 23-sealing rings; 24-sealing joint; 25-capsules; 26-guard board; 27-slip sleeves; 28-slips; 29-leaf springs; 30-a central tube; 31-a connector; 32-baffle rings; 33-lower joint.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
According to fig. 1, the oil layer protection well flushing packer comprises a central pipe 30, an upper joint 1, a lower joint 31, a control sleeve 5, a sliding sleeve 11, a sealing sleeve 9, a sealing valve, a sealing joint 34, a capsule 25, an anchoring structure and a connector 31, wherein the upper end of the central pipe 30 is connected with the upper joint 1 in a threaded manner, the lower end of the central pipe is sleeved with the lower joint 33 and is kept sealed by a sealing ring, the control sleeve 5 is sleeved outside the upper joint 1, is kept fixed by releasing a shear pin 3 and is kept sealed with the upper joint 1 by the sealing ring 2; the connector 31 is in threaded connection with the lower connector 33, the upper end of the airtight sleeve 9 is in threaded connection with the lower end of the control sleeve 5, and the lower end of the airtight sleeve is in threaded connection with the airtight connector 24; the other end of the closed joint 24 is connected with an anchoring mechanism, the other end of the anchoring mechanism is connected with a connector 31, and the capsule 25 is arranged between the anchoring mechanism and the central tube 30; the capsule 25 is screwed at one end to the sealing joint 24 and is in fluid connection with the through hole in the sealing valve, and at the other end to the stop ring 32 in the lower joint and is sealed with the lower joint 33 by a sealing ring. The sliding sleeve 11 is sleeved outside the central tube 30 and is sleeved in the airtight sleeve 9, and is positioned at the lower part of the upper joint 1, the control shear pin 6 penetrates through the upper joint 1 and is inserted into the sliding sleeve 11, the upper joint 1 is internally provided with the locking piece 7, and a corresponding groove matched with the locking piece 7 is formed in the lower part of the sliding sleeve 11 adjacent to the locking piece. The snap ring 10 is clamped in a chute between the sliding sleeve 11 and the airtight sleeve 9, and the cross section of the snap ring 10 is wedge-shaped.
The airtight valve comprises a pressing plate 15, a ball seat 18, an airtight valve ball 19, an airtight spring 20 and an airtight valve seat 21, wherein one end of the pressing plate 15 is fixed on a sliding sleeve 11 through a fastening screw 14, the other end of the pressing plate is abutted to the ball seat 18, a push rod 16 is arranged at the center of the pressing plate 15, the ball seat 18 is positioned in the airtight valve seat 21, one end of the pressing plate is blocked by the push rod 16, the other end of the pressing plate is blocked by the valve ball 19, the valve ball 19 is positioned in a channel of the airtight valve seat 21, the pressing plate is connected with the airtight valve seat 21 through the spring 20, a gap is formed between a central tube 30 and the pressing plate 15, and a pressure inlet hole is formed in the wall of the central tube 30 corresponding to the gap.
The anchoring mechanism is a slip mechanism and comprises a guard plate 26, slips 28, a leaf spring 29 and a slip sleeve 27, wherein the upper end of the slip sleeve 27 is in threaded connection with a sealing joint 24, the lower end of the slip sleeve 27 is in threaded connection with a connector 31, the slips 28 are arranged at openings of the slip sleeve 27 and are positioned in grooves of the guard plate 26, the leaf spring 29 is abutted to the outer side of the slips 28 along the circumferential surface of the slip sleeve 27, the guard plate 26 is an elastomer, the upper end of the guard plate is abutted to one end of the sealing joint 24, the lower end of the guard plate is abutted to one end of the connector 31, the sealing joint 24 and one end of the connector 31, which is abutted to the guard plate 26, are wedge-shaped, and the capsule 25 is arranged between the guard plate 26 and a central tube 30.
The packer of the invention is used as follows:
1. descending a well; the pipe column is assembled according to the process design, down to the design position.
2. Anchoring and starting; when the packer is set (or directly injected with water), the high-pressure pump is started to press, oil pipe hydraulic pressure is injected through the central pipe pressure inlet hole, the hydraulic pressure pushes the sliding sleeve to move upwards, so that the control shear pins are sheared off, the sliding sleeve moves upwards until the locking block is clamped into a corresponding groove in the sliding sleeve, the top plate moves upwards along with the sliding sleeve, a valve seat channel is exposed, the hydraulic pressure enters the sealing valve compression spring to enter the inner cavity of the capsule, the capsule is expanded, the slips are expanded and anchored on the inner wall of the sleeve to anchor the water injection pipe column, and when the pressure in the capsule is increased to a preset value, the sealing valve ball is tightly locked in a unidirectional way, so that the oil layer protection well flushing packer is in a permanent anchoring state.
3. Releasing anchoring; when the tubular column is required to be lifted, the upper joint drives the central tube to move upwards, the shear pins are released to shear, the lower end of the central tube moves upwards, the inner cavity of the capsule is decompressed, the slips retract, the oil layer protects the well flushing packer, the anchoring can be relieved, and the tubular column can be lifted out of the well smoothly.
Claims (1)
1. The utility model provides an oil reservoir protection well flushing packer, including center tube (30), upper joint (1), lower joint (31), control sleeve (5), sliding sleeve (11), airtight cover (9), airtight valve, airtight joint (34), capsule (25), anchoring structure, connector (31), center tube (30) upper end threaded connection upper joint (1), lower extreme cover connect lower joint (33) to keep sealed through the sealing washer, control sleeve (5) cup joint outside upper joint (1), keep fixed through releasing shear pin (3), and keep sealed with upper joint (1) through sealing washer (2); the connector (31) is in threaded connection with the lower connector (33), the upper end of the airtight sleeve (9) is in threaded connection with the lower end of the control sleeve (5), and the lower end of the airtight sleeve is in threaded connection with the airtight connector (24); the sliding sleeve (11) is sleeved outside the central tube (30) and is sleeved in the airtight sleeve (9), the sliding sleeve is positioned at the lower part of the upper joint (1), the control shear pin (6) is inserted into the sliding sleeve (11) through the upper joint (1), the other end of the airtight joint (24) is connected with the anchoring mechanism, the other end of the anchoring mechanism is connected with the connector (31), the capsule (25) is arranged between the anchoring mechanism and the central tube (30) and is in fluid communication with the airtight valve at the lower end of the sliding sleeve (11), one end of the capsule (25) is in threaded connection with the airtight joint (24), the other end of the capsule is in threaded connection with the baffle ring (32) in the lower joint and is sealed with the lower joint (33) through the sealing ring, The upper joint (1) is internally provided with a locking block (7), a corresponding groove matched with the locking block (7) is formed in the lower position, adjacent to the locking block, of the sliding sleeve (11), the upper joint is also provided with a clamping ring (10), the clamping ring (10) is clamped in a chute between the sliding sleeve (11) and the airtight sleeve (9), the cross section of the clamping ring (10) is wedge-shaped, the airtight valve comprises a pressing plate (15), a ball seat (18), an airtight valve ball (19), an airtight spring (20) and an airtight valve seat (21), one end of the pressing plate (15) is fixed on the sliding sleeve (11) through a fastening screw (14), the other end of the pressing plate is abutted on the ball seat (18), the center of the pressing plate (15) is provided with a push rod (16), The ball seat (18) is positioned in the airtight valve seat (21), one end of the ball seat is blocked by the ejector rod (16), the other end of the ball seat is blocked by the valve ball (19), the valve ball (19) is positioned in a channel of the airtight valve seat (21) and is connected with the airtight valve seat (21) through a spring (20), a gap is reserved between the central tube (30) and the pressing plate (15), a pressure inlet hole is formed in the wall of the central tube (30) corresponding to the gap, the anchoring mechanism is a slip mechanism, the slip mechanism comprises a guard plate (26), a slip (28), a leaf spring (29) and a slip sleeve (27), the upper end of the slip sleeve (27) is in threaded connection with the airtight joint (24), The lower extreme and connector (31) threaded connection, slips (28) set up in the opening part of slips cover (27), are located the recess of backplate (26) to evenly set up along the circumference of slips cover (27), leaf spring (29) butt is in slips (28) outside, backplate (26) are the elastomer, and upper end butt is in airtight joint (24) one end, and the lower extreme butt is in connector (31) one end, airtight joint (24) and connector (31) are wedge with the one end of backplate (26) butt, capsule (25) set up between backplate (26) and center tube (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386101.7A CN108487879B (en) | 2017-12-20 | 2017-12-20 | Oil layer protection well-flushing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386101.7A CN108487879B (en) | 2017-12-20 | 2017-12-20 | Oil layer protection well-flushing packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108487879A CN108487879A (en) | 2018-09-04 |
| CN108487879B true CN108487879B (en) | 2024-09-24 |
Family
ID=63343954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711386101.7A Active CN108487879B (en) | 2017-12-20 | 2017-12-20 | Oil layer protection well-flushing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108487879B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339734B (en) * | 2018-10-23 | 2023-08-18 | 天津泊荣石油科技发展有限公司 | Packer for annular pipeline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201212374Y (en) * | 2008-07-15 | 2009-03-25 | 于成龙 | Oil sleeve zonal injection packer |
| CN104033126A (en) * | 2014-05-14 | 2014-09-10 | 天津市滨海新区龙新石油机械制造有限公司 | Self-locking sealed type washable well packer capable of expanding through hydraulic power |
| CN206111118U (en) * | 2016-10-17 | 2017-04-19 | 中国石油化工股份有限公司 | Capsule type water conservancy anchor |
| CN207960569U (en) * | 2017-12-20 | 2018-10-12 | 高云东 | A kind of oil layer protection flushing packer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5462120A (en) * | 1993-01-04 | 1995-10-31 | S-Cal Research Corp. | Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes |
| CN2426521Y (en) * | 2000-03-15 | 2001-04-11 | 胜利石油管理局采油工艺研究院 | Anchoring type washable well packer |
| CN101392636A (en) * | 2008-10-29 | 2009-03-25 | 胡振明 | Sand prevention water injection packer |
| CN101737019B (en) * | 2009-12-02 | 2012-09-05 | 东营百华石油技术开发有限公司 | Release packer capable of well-flushing |
| CN105672934B (en) * | 2014-11-20 | 2018-04-03 | 中国石油化工股份有限公司 | The closed Anticreep packer of hydraulic cylinder-type |
| CN104790906A (en) * | 2015-04-09 | 2015-07-22 | 中国石油集团西部钻探工程有限公司 | Machinery hydraulic pressure dual-functional prestress well cementation device |
-
2017
- 2017-12-20 CN CN201711386101.7A patent/CN108487879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201212374Y (en) * | 2008-07-15 | 2009-03-25 | 于成龙 | Oil sleeve zonal injection packer |
| CN104033126A (en) * | 2014-05-14 | 2014-09-10 | 天津市滨海新区龙新石油机械制造有限公司 | Self-locking sealed type washable well packer capable of expanding through hydraulic power |
| CN206111118U (en) * | 2016-10-17 | 2017-04-19 | 中国石油化工股份有限公司 | Capsule type water conservancy anchor |
| CN207960569U (en) * | 2017-12-20 | 2018-10-12 | 高云东 | A kind of oil layer protection flushing packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108487879A (en) | 2018-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181018 Address after: 257231 No. 26 West Road, Gudao Town, Hekou District, Dongying, Shandong Applicant after: DONGYING CHANGRUI PETROLEUM MACHINERY FITTINGS CO.,LTD. Address before: 257231 No. 26 West Road, Gudao Town, Hekou District, Dongying, Shandong Applicant before: Gao Yundong Applicant before: Liu Jiming |
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| TA01 | Transfer of patent application right | ||
| CB03 | Change of inventor or designer information |
Inventor after: Gao Yundong Inventor before: Gao Yundong Inventor before: Liu Jiming |
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