CN212671724U - Downhole trial production tool - Google Patents
Downhole trial production tool Download PDFInfo
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- CN212671724U CN212671724U CN202021422073.7U CN202021422073U CN212671724U CN 212671724 U CN212671724 U CN 212671724U CN 202021422073 U CN202021422073 U CN 202021422073U CN 212671724 U CN212671724 U CN 212671724U
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Abstract
The utility model provides a trial production instrument in pit. Relates to the technical field of oil field trial production tools. A piston is arranged in a central hole of the body, a ring groove is formed in the middle of the piston, a plurality of liquid inlet holes are formed in the bottom of the ring groove and communicated with the bottom of the piston, a step hole is formed in the wall of the central hole of the body, and a bypass flow passage located in the wall of the body pipe is formed in the upper portion of the step hole and communicated with the central hole in the upper portion of the body. The utility model discloses following beneficial effect has: through the annular and the step hole that set up the piston mutual position when pressure variation changes, change the area of passing through of oil stream and even close this passageway, thereby realized carrying out oil pipe oil shutoff automatically when great oil pressure, avoid the emergence of blowout accident, have the flow and stabilize, close the reliable characteristics of well, when needs adjustment well head blowout pressure, can also drop into the instrument to the pit, through interior hexagonal hole rotation locking ring, the position of adjustment locking ring, the degree of preload of adjustment spring, the blowout pressure value of adjustable well head.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field trial production instrument technique and specifically relates to a trial production instrument in pit.
Background art:
the notice number CN 207813588U discloses a downhole trial production tool, which comprises an outer oil pipe, an oil pipe cap, a movable plug sleeve, a blowout prevention piston, a piston spring and a plug sleeve spring, wherein the oil pipe cap comprises a conical pipe head and an oil pipe sleeve, and the impact on a pipeline can be cushioned by the movable plug sleeve and the plug sleeve spring when the trial production operation starts; through the oil pipe cap, prevent blowout piston and piston spring, can carry out the oil pipe shutoff automatically when the pilot production oil pressure is too big, avoid the emergence of blowout accident, this technical scheme is through two metal cone torus laminating as preventing spouting the means and reaching the purpose of preventing spouting under shaft bottom pressure, however when shaft bottom pressure takes place pulse vibration, the binding face is the blocking effect when separating each other, still can not guarantee the problem of pulse liquid impact blowout, can not adjust simultaneously and block up pressure, adaptability is not high.
The utility model has the following contents:
in order to solve the problem, the utility model provides a trial production instrument in pit.
The technical scheme of the utility model is that: a downhole trial production tool comprises a body, wherein an upper connector is arranged at the upper part of the body, a lower connector is arranged at the lower part of the body, a piston is arranged in a central hole of the body, the bottom of the piston is connected with the central hole of the body in a threaded manner, the diameter of an inner hole of a positioning ring is smaller than the outer diameter of the piston, a spring is arranged at the top of the piston, an overflowing base plate is arranged at the upper part of the spring, evenly distributed overflowing holes are formed in the overflowing base plate, a locking ring is arranged at the upper part;
the middle part of the piston is provided with a ring groove, the bottom of the ring groove is provided with a plurality of liquid inlet holes communicated with the bottom of the piston, the wall of the central hole of the body is provided with a step hole, and the upper part of the step hole is provided with a bypass flow passage positioned in the pipe wall of the body and communicated with the central hole at the upper part of the body;
the mutual position relation of the piston, the ring groove, the step hole and the bypass flow channel is as follows: the piston is propped against the top of the positioning ring under the action of the elastic force of the spring, the ring groove of the piston corresponds to the step hole at the position, when the bottom of the piston is pushed upwards by external force, the piston moves upwards, the ring groove moves upwards relative to the step hole until the ring groove and the step hole are staggered with each other, and no matter where the piston is located, the communication position of the bypass flow channel and the central hole of the body is always located above the top of the piston;
the piston is connected with the center hole of the body in a clearance fit mode, two sealing rings are arranged on the upper portion and the lower portion of the ring groove of the piston respectively, and the two sealing rings are located on two sides of the step hole all the time when the piston moves up and down.
The inner hole of the locking ring is a hexagon socket.
The utility model discloses following beneficial effect has: through the annular and the step hole that set up the piston mutual position when pressure variation changes, change the area of passing through of oil stream and even close this passageway, thereby realized carrying out oil pipe oil shutoff automatically when great oil pressure, avoid the emergence of blowout accident, have the flow and stabilize, close the reliable characteristics of well, when needs adjustment well head blowout pressure, can also drop into the instrument to the pit, through interior hexagonal hole rotation locking ring, the position of adjustment locking ring, the degree of preload of adjustment spring, the blowout pressure value of adjustable well head.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the present invention.
In the figure, 1-a body, 2-a locking ring, 3-an upper connector, 4-a hexagon socket hole, 5-an overflowing cushion plate, 6-an overflowing hole, 7-a spring, 8-a bypass flow channel, 9-a piston, 10-an annular groove, 11-a step hole, 12-a liquid inlet hole, 13-a positioning ring and 14-a lower connector.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown by combining the figure 1 with the figure 2, the downhole trial production tool comprises a body 1, wherein an upper connector 3 is arranged at the upper part of the body 1, a lower connector 14 is arranged at the lower part of the body 1 and used for connecting an upper pipe column and a lower pipe column, a piston 9 is arranged in a central hole of the body 1, the bottom of the piston 9 is connected with a central hole of the body 1 in a threaded manner, the inner hole diameter of a positioning ring 13 is smaller than the outer diameter of the piston 9 so as to prevent the piston 9 from falling out of the bottom, a spring 7 is arranged at the top of the piston 9, an overflowing cushion plate 5 is arranged at the upper part of the spring 7, overflowing holes 6 are uniformly distributed in the overflowing cushion plate 5, a locking ring 2 is arranged at the upper part of the overflowing cushion plate 5;
the middle part of the piston 9 is provided with a ring groove 10, the bottom of the ring groove 10 is provided with a plurality of liquid inlet holes 12 communicated with the bottom of the piston 9, the wall of the central hole of the body 1 is provided with a step hole 11, and the upper part of the step hole 11 is provided with a bypass flow passage 8 positioned in the pipe wall of the body 1 and communicated with the central hole at the upper part of the body 1;
the mutual positional relationship among the piston 9, the ring groove 10, the stepped hole 11 and the bypass flow passage 8 is: the piston 9 is propped against the top of the positioning ring 13 under the action of the elastic force of the spring 7, when the position is reached, the ring groove 10 of the piston 9 corresponds to the step hole 11, when the bottom of the piston 9 is pushed upwards by an external force, the piston 9 moves upwards, the ring groove 10 moves upwards relative to the step hole 11 until the ring groove 10 and the step hole 11 are staggered with each other, no matter where the position of the piston 9 is, the position of the bypass flow channel 8 communicated with the central hole of the body 1 is always positioned above the top of the piston 9, and the position of the piston 9 cannot block the communication between the bypass flow channel 8 and the central hole at;
piston 9 and body 1 centre bore clearance fit are connected, and piston 9's annular 10 is equipped with twice sealing washer respectively from top to bottom, and twice sealing washer is located step hole 11 both sides all the time when piston 9 reciprocates, and the lower part sealing washer comes liquid inlet 12 and step hole 11 interval, and the upper portion sealing washer comes annular 10 and body 1's centre bore upper portion interval, and the oil stream can only flow out through liquid inlet 12, annular 10, step hole 11 and bypass flow path 8.
The inner hole of the locking ring 2 is a hexagon socket 4, the pretension of the spring 7 can be adjusted in advance by adjusting the connecting position of the locking ring 2, namely, the pressure value which needs to be acted on the bottom of the piston 9 when the annular groove 10 of the piston 9 is staggered with the step hole 11 is adjusted, when trial production is carried out at a certain oil pressure, oil flow with pressure enters the annular groove 10 from the liquid inlet hole 12 at the bottom of the piston 9, the pressure caused by the oil pressure can be balanced by the spring 7 at the top of the piston 9, the annular groove 10 corresponds to the step hole 11, the oil flow enters the step hole 11 from the annular groove 10 and flows into the central hole at the upper part of the body 1 through the bypass flow channel 12 and flows out 6 from the overflow hole, when the bottom hole pressure is increased, the piston 9 rises, the superposed part between the annular groove 10 and the step hole 11 is reduced, namely, the channel through which the oil flow flows out is reduced, the overflow area is reduced while, until the annular groove 10 and the stepped hole 11 are completely staggered, the channel through which the oil flow flows out is closed, the mutual positions of the annular groove 10 and the stepped hole 11 which are provided with the piston 9 are changed when the pressure is changed, the passing area of the oil flow is changed and the channel is even closed, so that the oil pipe oil plugging is automatically carried out when the oil pressure is large, the well blowout accident is avoided, and the characteristics of stable flow and reliable well closing are achieved.
When the wellhead open flow pressure needs to be adjusted, a tool can be put into the well, the locking ring 2 is rotated through the hexagon socket 4, the position of the locking ring 2 is adjusted, the pre-tightening degree of the spring 7 is adjusted, and the open flow pressure value of the wellhead can be adjusted.
Claims (2)
1. A downhole trial tool comprising a body (1), characterized in that: the upper part of the body (1) is provided with an upper connector (3), the lower part of the body is provided with a lower connector (14), a piston (9) is arranged in a central hole of the body (1), the bottom of the piston (9), the central hole of the body (1) is in threaded connection with a positioning ring (13), the diameter of an inner hole of the positioning ring (13) is smaller than the outer diameter of the piston (9), the top of the piston (9) is provided with a spring (7), the upper part of the spring (7) is provided with an overflowing base plate (5), the overflowing base plate (5) is provided with evenly distributed overflowing holes (6), the upper part of the overflowing base plate (5) is provided with a locking ring (2;
the middle part of the piston (9) is provided with a ring groove (10), the bottom of the ring groove (10) is provided with a plurality of liquid inlet holes (12) which are communicated with the bottom of the piston (9), the central hole wall of the body (1) is provided with a step hole (11), and the upper part of the step hole (11) is provided with a bypass flow passage (8) positioned in the pipe wall of the body (1) and communicated with the central hole at the upper part of the body (1);
the mutual position relation among the piston (9), the ring groove (10), the stepped hole (11) and the bypass flow channel (8) is as follows: the piston (9) is propped against the top of the positioning ring (13) under the action of the elastic force of the spring (7), when the piston (9) is at the position, the ring groove (10) of the piston (9) corresponds to the step hole (11), when the bottom of the piston (9) is pushed upwards by external force, the piston (9) moves upwards, the ring groove (10) moves upwards relative to the step hole (11) until the ring groove (10) and the step hole (11) are staggered with each other, and no matter where the piston (9) is located, the communication position of the bypass flow channel (8) and the central hole of the body (1) is always located above the top of the piston (9);
the piston (9) is in clearance fit connection with the central hole of the body (1), two sealing rings are respectively arranged on the upper part and the lower part of the ring groove (10) of the piston (9), and the two sealing rings are always positioned on two sides of the step hole (11) when the piston (9) moves up and down.
2. A downhole testing tool according to claim 1, wherein: the inner hole of the locking ring (2) is a hexagon socket (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422073.7U CN212671724U (en) | 2020-07-17 | 2020-07-17 | Downhole trial production tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422073.7U CN212671724U (en) | 2020-07-17 | 2020-07-17 | Downhole trial production tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212671724U true CN212671724U (en) | 2021-03-09 |
Family
ID=74816181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021422073.7U Active CN212671724U (en) | 2020-07-17 | 2020-07-17 | Downhole trial production tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212671724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117211727A (en) * | 2023-11-06 | 2023-12-12 | 中石化西南石油工程有限公司 | Double-packer annulus pressure balancing device |
-
2020
- 2020-07-17 CN CN202021422073.7U patent/CN212671724U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117211727A (en) * | 2023-11-06 | 2023-12-12 | 中石化西南石油工程有限公司 | Double-packer annulus pressure balancing device |
| CN117211727B (en) * | 2023-11-06 | 2024-02-27 | 中石化西南石油工程有限公司 | Double-packer annulus pressure balancing device |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220216 Address after: 163000 room 207, building D-3, standard industrial plant of Daqing Economic Development Construction Investment Group Co., Ltd., Daqing City, Heilongjiang Province Patentee after: HUAYUN LONGTENG MACHINERY MANUFACTURING CO.,LTD. Address before: Room 510, No. 1 Kaiyuan Street, Daqing Economic and Technological Development Zone, Jeanhu Road District, Heilongjiang Province Patentee before: ZHENGXIAN TECHNOLOGY Co.,Ltd. |