CN111706296B - Reverse circulation check valve capable of controlling opening and closing - Google Patents
Reverse circulation check valve capable of controlling opening and closing Download PDFInfo
- Publication number
- CN111706296B CN111706296B CN202010618568.5A CN202010618568A CN111706296B CN 111706296 B CN111706296 B CN 111706296B CN 202010618568 A CN202010618568 A CN 202010618568A CN 111706296 B CN111706296 B CN 111706296B
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- joint
- suspension
- sleeve
- reverse circulation
- sealing
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- 238000007789 sealing Methods 0.000 claims abstract description 64
- 239000000725 suspension Substances 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000012856 packing Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
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- 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)
- Check Valves (AREA)
Abstract
The invention relates to a reverse circulation check valve capable of controlling opening and closing, and belongs to the field of downhole operation tools of oil and gas wells. The valve comprises a sealing sleeve, an upper joint, a lower joint, a valve core, a suspension joint and a suspension sleeve, wherein the sealing sleeve is arranged at one end of the upper joint; one end of the sealing sleeve is provided with a lower joint; the lower joint is provided with a suspension joint through a suspension sleeve. The reverse circulation check valve carries out load limiting transmission through limiting bosses at the ends of the suspension joint and the suspension sleeve. The transmission of tubular column load has been guaranteed promptly, lower part tubular column is not influenced when can making upper portion tubular column free rotation again, only need during the operation through lift, push down the action of upper portion tubular column just can control opening, closing of this reverse circulation check valve, has guaranteed the stable form and the controllability that use from this. The reverse circulation check valve has the characteristics of wide application range and high reliability; is particularly suitable for sand control operation of highly deviated wells.
Description
Technical Field
The invention relates to a reverse circulation check valve capable of controlling opening and closing, and belongs to the field of downhole operation tools of oil and gas wells.
Background
In the aspect of sand control operation in oil fields, the commonly used sand control mode at present is gravel packing sand control technology, the technology is to put a pipe column to a packing position, carry out gravel packing operation in a positive circulation mode, wash sand in a reverse circulation mode after the completion of packing, and wash out redundant gravel remained in the oil pipe. The main function of the reverse circulation check valve is to control the fluid flow direction by opening and closing the valve. In reverse circulation operation, at present, a ball is generally seated on a ball seat to play a sealing role, fluid in an annular space enters an oil pipe and is blocked at the oil pipe, a lower passage is closed, and then the fluid changes the flow direction and is discharged out of a wellhead through the oil pipe, so that reverse circulation well washing is realized.
Disclosure of Invention
The invention aims to: the utility model provides a when gravel packing, through pushing down the tubular column, can guarantee that the circulating channel is unblocked, during reverse circulation, through lifting the tubular column, can close upper and lower passageway, realize the anti-circulation single current valve switch of artificial control to improve the stability of using, and when guaranteeing tubular column payload, make the unaffected reverse circulation single current valve of steerable switch of lower part tubular column when upper portion tubular column free rotation.
The technical scheme of the invention is as follows:
a reverse circulation check valve capable of controlling opening and closing; it comprises seal cover, top connection, lower clutch, case, suspension joint and suspension cover, its characterized in that: one end of the upper joint is provided with a sealing sleeve; one end of the sealing sleeve is provided with a lower joint; the lower joint is provided with a suspension joint through a suspension sleeve.
The sealing sleeve is in threaded connection with the upper joint, and the sealing sleeve and the upper joint are fixed with each other through a fastening screw A; an O-shaped sealing ring is arranged between the sealing sleeve and the upper joint.
The end of the sealing sleeve is provided with a nut in a threaded manner, and the nut is connected with the suspension joint through a fastening screw B.
The lower joint is a step-shaped reducing tubular body, and an outer sealing assembly A is arranged on the circumference of one end of the lower joint.
The lower joint and the suspension sleeve are in threaded connection with each other, and the lower joint and the suspension sleeve are fixed with each other through a fastening screw C.
And the lower joint is in sliding connection with the sealing sleeve.
The suspension joint is connected with the suspension sleeve in a sliding mode.
The seal sleeve is provided with a reducing center hole; a flow guide disc is clamped between the sealing sleeve and the upper joint.
The center part of the flow guide disc is provided with a mounting hole, and liquid flow holes are uniformly distributed on the flow guide disc at the periphery of the mounting hole.
The flow guiding disc is movably provided with a valve core through a spring, and one end of the valve core is in sealing contact connection with the interface of the lower connector.
The valve core is T-shaped.
And an outer sealing assembly B is arranged on the circumference of the sealing sleeve on one side of the screw cap.
Through holes are evenly distributed on the circumference of the suspension sleeve in the axial direction.
Liquid inlet holes are uniformly distributed on the circumference of the lower joint port close to the valve core.
The invention has the beneficial effects that:
1) the valve can be controlled to be opened and closed only by lifting and pressing the pipe column, so that the stability and controllability of use are ensured.
2) The valve core is inserted into the central hole of the flow guide disc through the upper end long rod, the valve core is righted, the upper channel and the lower channel are isolated more effectively, and the maximization of reverse circulation liquid flow is guaranteed.
3) And the valve core is opened during filling, so that the circulation channel is smooth during circulation filling.
4) The lower pipe column is not affected when the upper pipe column rotates freely.
Drawings
FIG. 1 is a structural diagram illustrating an open state of the present invention;
FIG. 2 is a schematic diagram of the closed state of the present invention.
In the figure: 1. the device comprises a sealing sleeve, 2, an upper joint, 3, a lower joint, 4, a suspension joint, 5, a suspension sleeve, 6, a valve core, 7, fastening screws A and 8, outer sealing assemblies A and 9, fastening screws C and 10, a nut, 11, fastening screws B and 12, outer sealing assemblies B and 13, a flow guide disc, 14, a spring, 15 and a liquid inlet hole.
Detailed Description
The reverse circulation check valve capable of controlling opening and closing is composed of a sealing sleeve 1, an upper joint 2, a lower joint 3, a valve core 6, a suspension joint 4 and a suspension sleeve 5. One end of the upper joint 2 is provided with a sealing sleeve 1; the sealing sleeve 1 is in threaded connection with the upper joint 2, and the sealing sleeve 1 and the upper joint 2 are fixed with each other through a fastening screw A7; an O-shaped sealing ring is arranged between the sealing sleeve 1 and the upper joint 2 to ensure the sealing between the sealing sleeve 1 and the upper joint 2.
One end of the sealing sleeve 1 is provided with a lower joint 3; the lower joint 3 is provided with a suspension joint 4 through a suspension sleeve 5; liquid discharge through holes are axially and uniformly distributed on the circumference of the hanging sleeve 5. The lower joint 3 is connected with the sealing sleeve 1 and the suspension joint 4 in a sliding and sealing way; the suspension joint 4 and the suspension sleeve 5 are connected in a sliding way. The suspension joint 4 and the suspension jacket 5 are mutually axially rotatable. The lower joint 3 and the hanging sleeve 5 are in threaded connection with each other, and the lower joint 3 and the hanging sleeve 5 are fixed with each other through a fastening screw C9; the lower joint 3 is a step-shaped variable-diameter tubular body, and an outer sealing assembly A8 is arranged on the circumference of one end of the lower joint 3.
The end of the sealing sleeve 1 is provided with a screw cap 10 in a threaded manner, and the screw cap 10 is connected with the suspension joint 4 through a fastening screw B11. An outer sealing assembly B12 is arranged on the circumference of the sealing sleeve 1 on one side of the screw cap 10; the outer seal assembly B12 and the outer seal assembly A8 are respectively composed of a mounting ring and seal rings arranged on the mounting ring at intervals. A clearance is provided between the nut 10 and the suspension sleeve 5 to provide a stroke for the relative movement between the suspension sleeve 5 and the suspension joint 4 during operation.
The central hole of the sealing sleeve 1 is a step-shaped variable diameter hole; a flow guide disc 13 is fixedly clamped between the seal sleeve 1 and the upper connector 2 through a step end face of the seal sleeve 1 and an end face of the upper connector 2, the flow guide disc 13 is disc-shaped, a mounting hole is formed in the center of the flow guide disc 13, and liquid flow holes are evenly distributed in the flow guide disc on the periphery of the mounting hole. The diversion disc 13 is movably provided with a valve core 6 through a mounting hole and a spring 14, and the valve core 6 is T-shaped. One end of the valve core 6 is in clearance sealing contact connection with the port of the lower joint 3 and the small port of the central hole of the sealing sleeve 1, and liquid inlet holes 15 are uniformly distributed on the circumference of the port of the lower joint 3 close to the valve core 6 so as to communicate liquid flow channels at two ends of the valve core 6. The guide disc 13 can limit the valve core 6 to move upwards, and the valve core 6 is inserted in the mounting hole of the guide disc 13 to play a role in righting the valve core 6, so that the problem that the valve core 6 is eccentrically arranged in a highly deviated well and cannot be well seated and sealed with the sealing sleeve 1 is avoided.
The reverse circulation check valve is arranged on the pipe column through an upper connector 2 and is matched with a load indicator for use; when filling at the sand control operation in-process, the tubular column is pushed down, guarantees that circulation channel is unblocked, during reverse circulation, lifts the tubular column, closes upper and lower passageway, realizes the reverse circulation check valve switch of artificial control to this improves stability in use, specifically does:
during filling operation, a pipe column is pressed downwards, in the process, the upper joint 2, the sealing sleeve 1 and the suspension joint 4 move downwards relative to the lower joint 3, and the lower joint 3 moves upwards; the suspension joint 4 and the suspension sleeve 5 axially slide relatively; the end of the lower joint 3 extends out of the sealing sleeve 1 and pushes against the valve core 6 to compress the spring 14 to enable the lower joint to move upwards, when the upper joint 2, the sealing sleeve 1 and the suspension joint 4 move downwards relative to the lower joint 3 to a stop point, the liquid inlet hole 15 on the lower joint 3 is exposed out of the sealing sleeve 1, the valve core 6 is released from sealing contact with the small port of the central hole of the sealing sleeve 1, and the reverse circulation check valve is opened, so that a circulation channel is provided for filling operation. At the moment, the filling liquid which is not squeezed into the stratum and is deposited in the sand prevention section enters the lower oil pipe from the sieve pipe during filling, flows upwards to the reverse circulation check valve, then flows upwards through the lower joint 3, the liquid inlet hole 15, the sealing sleeve 1, the liquid flow hole of the flow guide disc 13 and the upper joint 2 until returning to the wellhead, so that the circulation channel is smooth during filling, and filling operation is realized.
After the filling operation is finished, redundant gravels in the oil pipe need to be washed out of the shaft through reverse circulation, namely when the reverse circulation is carried out, the pipe column is lifted up, in the process, the upper joint 2, the sealing sleeve 1, the suspension joint 4 and the lower joint 3 move back to back, and the lower joint 3 moves downwards; the contact state of the end of the lower joint 3 and the valve core 6 is released; the feed liquor hole 15 on the lower clutch 3 gets into and is blocked in the path hole in the seal cover 1, simultaneously, thereby spring 14 kick-backs and is sealed contact state with case 6 pressure on the centre bore port of seal cover 1, at this moment, the centre bore of lower clutch 3 is the encapsulated situation, the runner passageway is closed, from this the realization is kept apart the runner purpose from top to bottom, at this moment, the reverse circulation liquid is stopped up when oil pipe internal flow reaches this reverse circulation valve department, then flow to upper portion annular space, the gravel that will be detained in the oil pipe takes out the well head, realize the reverse circulation operation.
The valve core 6 of the reverse circulation check valve adopts a T-shaped design, and the end head of one end of the reverse circulation check valve is hemispherical, so that the sealing state of the reverse circulation check valve and the small-diameter hole port of the sealing sleeve 1 can be ensured; and is inserted on the deflector 13 through the mounting hole of the deflector 13; the purpose of righting the valve core 6 can be achieved through the mounting hole of the flow guide disc 13, and therefore the purpose that the effect of closing and isolating the upper flow channel and the lower flow channel of the valve core 6 is influenced by the fact that the valve core is deviated from a sealing position due to the influence of self gravity in a well with a large inclination is avoided. The suspension joint 4 and the suspension sleeve 5 of the reverse circulation check valve can rotate circumferentially mutually, so that an upper pipe column can rotate independently without influencing a lower pipe column, and load limiting transmission is carried out through limiting bosses at the ends of the suspension joint 4 and the suspension sleeve 5. The transmission of tubular column load has been guaranteed promptly, lower part tubular column is not influenced when can making upper portion tubular column free rotation again, only need during the operation through lift, push down the action of upper portion tubular column just can control opening, closing of this reverse circulation check valve, has guaranteed the stable form and the controllability that use from this. The reverse circulation check valve has the characteristics of wide application range and high reliability; is particularly suitable for sand control operation of highly deviated wells.
Claims (6)
1. A reverse circulation check valve capable of controlling opening and closing; the valve consists of a sealing sleeve (1), an upper joint (2), a lower joint (3), a valve core (6), a suspension joint (4) and a suspension sleeve (5), wherein the sealing sleeve (1) is arranged at one end of the upper joint (2); one end of the sealing sleeve (1) is provided with a lower joint (3); the method is characterized in that: the lower joint (3) is provided with a suspension joint (4) through a suspension sleeve (5), and the suspension joint (4) is connected with the suspension sleeve (5) in a sliding way; the suspension joint (4) and the suspension sleeve (5) can rotate circumferentially, so that an upper pipe column can rotate independently without influencing a lower pipe column, the lower joint (3) and the suspension sleeve (5) are in threaded connection with each other, and the lower joint (3) and the suspension sleeve (5) are fixed with each other through a fastening screw C (9); a nut (10) is installed at the end of the sealing sleeve (1) in a threaded manner, and the nut (10) is connected with the suspension joint (4) through a fastening screw B (11); a gap is arranged between the screw cap (10) and the suspension sleeve (5) so as to reserve a stroke for the relative movement between the suspension sleeve (5) and the suspension joint (4) when in work; the lower joint (3) is connected with the sealing sleeve (1) and the suspension joint (4) in a sliding and sealing manner; the seal sleeve (1) is provided with a reducing central hole; a flow guide disc (13) is clamped between the seal sleeve (1) and the upper joint (2), a T-shaped valve core (6) is movably mounted on the flow guide disc (13) through a spring (14), a mounting hole is formed in the center of the flow guide disc (13), the valve core (6) is movably inserted on the flow guide disc (13) through the mounting hole to achieve the effect of righting the valve core (6), and liquid flow holes are uniformly distributed in the flow guide disc (13) on the periphery of the mounting hole; one end of the valve core (6) is connected with the port of the lower joint (3) in a sealing contact way.
2. A controllably switchable reverse circulation check valve as claimed in claim 1; the method is characterized in that: the sealing sleeve (1) is in threaded connection with the upper joint (2), and the sealing sleeve (1) and the upper joint (2) are fixed with each other through a fastening screw A (7); an O-shaped sealing ring is arranged between the sealing sleeve (1) and the upper joint (2).
3. A controllably switchable reverse circulation check valve as claimed in claim 1; the method is characterized in that: the lower joint (3) is a step-shaped reducing tubular body, and an outer sealing assembly A (8) is arranged on the circumference of one end of the lower joint (3).
4. A controllably switchable reverse circulation check valve as claimed in claim 1; the method is characterized in that: liquid inlet holes (15) are uniformly distributed on the circumference of the port of the lower joint (3) close to the valve core (6).
5. A controllably switchable reverse circulation check valve as claimed in claim 1; the method is characterized in that: and liquid discharge through holes are uniformly distributed on the circumference of the suspension sleeve (5) in the circumferential direction.
6. A controllably switchable reverse circulation check valve as claimed in claim 1; the method is characterized in that: and an outer sealing assembly B (12) is arranged on the circumference of the sealing sleeve (1) on one side of the screw cap (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618568.5A CN111706296B (en) | 2020-07-01 | 2020-07-01 | Reverse circulation check valve capable of controlling opening and closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618568.5A CN111706296B (en) | 2020-07-01 | 2020-07-01 | Reverse circulation check valve capable of controlling opening and closing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111706296A CN111706296A (en) | 2020-09-25 |
| CN111706296B true CN111706296B (en) | 2022-03-25 |
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ID=72544109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010618568.5A Active CN111706296B (en) | 2020-07-01 | 2020-07-01 | Reverse circulation check valve capable of controlling opening and closing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706296B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901115B (en) * | 2021-02-20 | 2023-04-11 | 中海油能源发展股份有限公司 | Selective one-way valve for sand prevention |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202228026U (en) * | 2011-09-22 | 2012-05-23 | 中国海洋石油总公司 | Sand setting type cleanable well check valve suitable for high-inclination well |
| CN202970628U (en) * | 2012-12-12 | 2013-06-05 | 山东瑞丰石油技术有限责任公司 | Horizontal well open-hole gravel packing tool |
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN204738798U (en) * | 2015-05-25 | 2015-11-04 | 山东博赛特石油技术有限公司 | Device is filled in a tubular column horizontal well bottom layering |
| CN207315303U (en) * | 2017-09-11 | 2018-05-04 | 中国石油天然气股份有限公司 | Reverse circulation check valve and reverse circulation device |
| WO2018152089A1 (en) * | 2017-02-17 | 2018-08-23 | Bly Ip Inc. | Reverse-circulation drilling assemblies and methods of using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10822896B2 (en) * | 2017-11-07 | 2020-11-03 | Baker Hughes, A Ge Company, Llc | Bypass valve |
-
2020
- 2020-07-01 CN CN202010618568.5A patent/CN111706296B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202228026U (en) * | 2011-09-22 | 2012-05-23 | 中国海洋石油总公司 | Sand setting type cleanable well check valve suitable for high-inclination well |
| CN202970628U (en) * | 2012-12-12 | 2013-06-05 | 山东瑞丰石油技术有限责任公司 | Horizontal well open-hole gravel packing tool |
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN204738798U (en) * | 2015-05-25 | 2015-11-04 | 山东博赛特石油技术有限公司 | Device is filled in a tubular column horizontal well bottom layering |
| WO2018152089A1 (en) * | 2017-02-17 | 2018-08-23 | Bly Ip Inc. | Reverse-circulation drilling assemblies and methods of using same |
| CN207315303U (en) * | 2017-09-11 | 2018-05-04 | 中国石油天然气股份有限公司 | Reverse circulation check valve and reverse circulation device |
Also Published As
| Publication number | Publication date |
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| CN111706296A (en) | 2020-09-25 |
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