CN215761572U - Ball-bundling type single-flow valve for oil-water well - Google Patents
Ball-bundling type single-flow valve for oil-water well Download PDFInfo
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- CN215761572U CN215761572U CN202121513165.0U CN202121513165U CN215761572U CN 215761572 U CN215761572 U CN 215761572U CN 202121513165 U CN202121513165 U CN 202121513165U CN 215761572 U CN215761572 U CN 215761572U
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Abstract
The utility model relates to a ball-bunching type check valve for an oil-water well. The technical scheme is as follows: the ball seat is connected with the lower joint through the shear pin; the upper end of the ball seat is provided with a circle of clamping claws which are arranged at intervals, and the upper end parts of the clamping claws are provided with bulges. The beneficial effects are that: according to the utility model, the combination of the clamping claw and the first groove and the second groove is designed, so that the diameter of the inner bulge at the upper part of the clamping claw is reduced and changed, the steel ball is wrapped by the clamping claw, and the steel ball is prevented from being pushed away by reverse liquid; then, under the combined action of the steel ball and the ball seat, the one-way circulation performance of the external fluid of the check valve and the internal fluid of the check valve can be realized, and when the fluid flows reversely, the fluid can be blocked.
Description
Technical Field
The utility model relates to an underground tool for petroleum exploitation, in particular to a ball-bunching type check valve for an oil-water well.
Background
In oil exploitation, the check valve is a common downhole tool in an oil-water well, is positioned at the bottom of a pipe column, mainly adopts a ball seat and steel ball structure, and has the function of realizing the one-way circulation performance of external fluid of the check valve and the inside of the check valve under the combined action of the ball and the ball seat, and when the fluid reversely flows, the fluid is blocked and separated.
However, when some process technologies are implemented, fluid needs to be positively injected or a well needs to be positively circulated and washed through a check valve, and larger-size underground impurities need to be discharged back, and at the moment, bidirectional circulation of the fluid needs to be realized inside and outside the check valve; in the subsequent process, the single flow and reverse blocking effects are required to be met, the steel ball of the existing one-way valve can be washed away by liquid sometimes, so that the blocking function cannot be continuously realized, and the existing one-way valve can only be taken out of a pipe column to be replaced again, so that well repairing operation is caused, and the yield of oil is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art, and provides the ball-restraining type check valve for the oil-water well, which can restrain a steel ball through the change of a restraining claw so as to realize multiple functions.
The utility model provides a ball-bunching type check valve for an oil-water well, which has the technical scheme that: the ball seat structure comprises an upper joint (1), a ball seat (2), a steel ball (3), a lower joint (4) and shear pins (5), wherein the lower end of the upper joint (1) is movably connected with the upper end of the lower joint (4), the steel ball (3) is arranged in the inner cavities of the upper joint (1) and the lower joint (4), and the ball seat (2) is connected with the lower joint (4) through the shear pins (5); the upper end of the ball seat (2) is provided with a circle of clamping claws (2.5) which are arranged at intervals, and the upper end part of the clamping claw (2.5) is provided with a bulge (2.5.1).
Preferably, a first groove (1-1) is arranged on the upper side of the inner wall of the upper joint (1), a second groove (1-2) is arranged in the middle of the inner wall, and the diameter of the first groove (1-1) is larger than that of the second groove (1-2).
Preferably, the outer side of the bulge (2.5.1) at the upper end of the clamping jaw (2.5) is provided with an upper part outer bulge (2-1) of the clamping jaw, and the upper part outer bulge (2-1) of the clamping jaw is matched with the first groove (1-1) or the second groove (1-2) to lock the ball seat (2).
Preferably, the inner side of the bulge at the upper end of the clamping claw (2.5) is provided with an inner bulge (2-2) at the upper part of the clamping claw, and the steel ball (3) enters the inner cavity of the ball seat (2) along the inner bulge (2-2) at the upper part of the clamping claw.
Preferably, the middle part of the outer wall of the ball seat (2) is provided with a step (2-3), and the lower side of the ball seat (2) is provided with a shear pin groove (2-4) which is used for being matched with a shear pin (5) and arranged on the lower joint (4).
Preferably, the middle part of the ball seat (2) is provided with a conical surface structure, and sealing is realized through the steel ball (3).
The use method of the beam ball type check valve for the oil-water well comprises two processes of bidirectional circulation and beam ball single flow, and specifically comprises the following steps:
(1) bidirectional circulation: the initial state of the check valve is that no steel ball (3) is put into the ball seat (2), and the check valve is communicated internally and externally at the moment, so that on one hand, the forward injection of fluid or forward circulation well flushing from inside to outside can be realized, and on the other hand, the reverse circulation well flushing with larger discharge amount can be realized due to no obstruction of the steel ball (3), and the discharge of blocks with larger size is facilitated;
(2) beam ball single flow: putting the steel ball (3), wherein at the moment, an outer bulge (2-1) at the upper part of the binding claw (2.5) of the ball seat is positioned in a first groove (1-1) of the upper joint to be matched, the diameter of a circle formed by the inner bulge (2-2) at the upper part of the binding claw is larger than that of the steel ball (3), and the steel ball (3) can smoothly pass through the inner bulge (2-2) at the upper part of the binding claw and enter a conical surface structure inside the ball seat (2); and continuously pressing, shearing a shear pin (5) under the hydraulic action of the ball seat (2), limiting a step (2-3) on the outer wall of the ball seat on the lower joint (4) in a downward direction, separating an outer bulge (2-1) on the upper part of the binding claw from a first groove (1-1) of the upper joint, entering a second groove (1-2) with a smaller diameter, limiting the outer bulge (2-1) on the upper part of the binding claw in the second groove (1-2) of the upper joint, extruding the inner bulge (2-2) on the upper part of the binding claw, and further forming a circle of diameter smaller than that of the steel ball (3) to realize the binding of the steel ball (3).
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the combination of the clamping claw and the first groove and the second groove is designed, so that the diameter of the inner bulge at the upper part of the clamping claw is reduced and changed, the steel ball is wrapped by the clamping claw, and the steel ball is prevented from being pushed away by reverse liquid; then, under the combined action of the steel ball and the ball seat, the one-way circulation performance of the external fluid of the check valve and the interior of the check valve can be realized, and when the fluid flows reversely, the fluid is blocked; when some process technologies are implemented, fluid is positively injected or a well is positively and circularly washed through a check valve, and underground sundries with larger sizes are reversely discharged, at the moment, the two-way circulation of the fluid can be realized inside and outside the check valve; in the subsequent process, the single flow and reverse blocking effects can be satisfied.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a steel ball not thrown in a well;
FIG. 3 is a schematic view of the structure of the clamping jaw;
FIG. 4 is a schematic view of the A-A structure of the clamp claw;
FIG. 5 is a schematic view showing a state after a steel ball is put in and a clamping claw is contracted;
in the upper diagram: the clamp comprises an upper joint 1, a ball seat 2, a steel ball 3, a lower joint 4, a shear pin 5, a first groove 1-1, a second groove 1-2, an outer bulge 2-1 at the upper part of a binding claw, an inner bulge 2-2 at the upper part of the binding claw, a step 2-3, a shear pin groove 2-4 binding claw 2.5, a conical surface structure 2.6 and a bulge 2.5.1.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Wherein, the upper side of the inner wall of the upper joint 1 is provided with a first groove 1-1, the middle part is provided with a second groove 1-2, and the diameter of the first groove 1-1 is larger than that of the second groove 1-2.
The outer side of the bulge 2.5.1 at the upper end of the binding claw 2.5 is provided with an outer bulge 2-1 at the upper part of the binding claw, and the outer bulge 2-1 at the upper part of the binding claw is matched with the first groove 1-1 or the second groove 1-2 to lock the ball seat 2.
The inner side of the bulge at the upper end of the binding claw 2.5 is provided with an inner bulge 2-2 at the upper part of the binding claw, and the steel ball 3 enters the inner cavity of the ball seat 2 along the inner bulge 2-2 at the upper part of the binding claw.
The middle part of the outer wall of the ball seat 2 is provided with steps 2-3, and the lower side of the ball seat 2 is provided with shear pin grooves 2-4 which are used for being matched with shear pins 5 and arranged on a lower joint 4.
Referring to fig. 5, the middle part of the ball seat 2 is provided with a conical surface structure 2.6, and sealing is realized through a steel ball 3.
The use method of the beam ball type check valve for the oil-water well comprises two processes of bidirectional circulation and beam ball single flow, and specifically comprises the following steps:
1, bidirectional circulation: the initial state of the check valve is that no steel ball 3 is put into the ball seat 2, and the check valve is communicated internally and externally at the moment, so that on one hand, the forward injection of fluid or forward circulation well flushing from inside to outside can be realized, and on the other hand, the reverse circulation well flushing with larger discharge amount can be realized due to no obstruction of the steel ball 3, and the removal of blocks with larger size is facilitated;
2 bundle ball single flow: a steel ball 3 is put in, at the moment, an outer bulge 2-1 at the upper part of a binding claw 2.5 of the ball seat is positioned in a first groove 1-1 of the upper joint and matched with the outer bulge, the diameter of a circle formed by an inner bulge 2-2 at the upper part of the binding claw is larger than that of the steel ball 3, and the steel ball 3 can smoothly pass through the inner bulge 2-2 at the upper part of the binding claw and enter a conical surface structure inside the ball seat 2; and continuously pressing, shearing the shear pin 5 under the hydraulic action of the ball seat 2, limiting the step 2-3 on the outer wall of the ball seat on the lower joint 4 in the downward direction, separating the outer bulge 2-1 on the upper part of the binding claw from the first groove 1-1 of the upper joint, entering the second groove 1-2 with smaller diameter, limiting the outer bulge 2-1 on the upper part of the binding claw in the second groove 1-2 of the upper joint, extruding the inner bulge 2-2 on the upper part of the binding claw, and forming a circle of which the diameter is smaller than that of the steel ball 3, thereby realizing the constraint on the steel ball 3.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the combination of the clamping claw and the first groove and the second groove is designed, so that the diameter of the inner bulge at the upper part of the clamping claw is reduced and changed, the steel ball is wrapped by the clamping claw, and the steel ball is prevented from being pushed away by reverse liquid; then, under the combined action of the steel ball and the ball seat, the one-way circulation performance of the external fluid of the check valve and the interior of the check valve can be realized, and when the fluid flows reversely, the fluid is blocked; when some process technologies are implemented, fluid is positively injected or a well is positively and circularly washed through a check valve, and underground sundries with larger sizes are reversely discharged, at the moment, the two-way circulation of the fluid can be realized inside and outside the check valve; in the subsequent process, the single flow and reverse blocking effects can be satisfied.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, the technical solution according to the present invention is subject to corresponding simple modifications or equivalent changes, as far as the scope of the present invention is claimed.
Claims (6)
1. A ball-bundling type check valve for an oil-water well is characterized in that: the ball seat structure comprises an upper joint (1), a ball seat (2), a steel ball (3), a lower joint (4) and shear pins (5), wherein the lower end of the upper joint (1) is movably connected with the upper end of the lower joint (4), the steel ball (3) is arranged in the inner cavities of the upper joint (1) and the lower joint (4), and the ball seat (2) is connected with the lower joint (4) through the shear pins (5); the upper end of the ball seat (2) is provided with a circle of clamping claws (2.5) which are arranged at intervals, and the upper end part of the clamping claw (2.5) is provided with a bulge (2.5.1).
2. The ball-bundling type check valve for oil-water wells as claimed in claim 1, wherein: the inner wall upper side of the upper joint (1) is provided with a first groove (1-1), the middle part of the inner wall upper joint is provided with a second groove (1-2), and the diameter of the first groove (1-1) is larger than that of the second groove (1-2).
3. The ball-bundling type check valve for oil-water wells as claimed in claim 2, wherein: the outer side of the bulge (2.5.1) at the upper end of the clamping claw (2.5) is provided with an upper part outer bulge (2-1) of the clamping claw, and the upper part outer bulge (2-1) of the clamping claw is matched with the first groove (1-1) or the second groove (1-2) to lock the ball seat (2).
4. The ball-bundling type check valve for oil-water wells as claimed in claim 1, wherein: the inner side of the bulge at the upper end of the clamping claw (2.5) is provided with an inner bulge (2-2) at the upper part of the clamping claw, and the steel ball (3) enters the inner cavity of the ball seat (2) along the inner bulge (2-2) at the upper part of the clamping claw.
5. The ball-bundling type check valve for oil-water wells as claimed in claim 4, wherein: the ball seat is characterized in that a step (2-3) is arranged in the middle of the outer wall of the ball seat (2), and a shear pin groove (2-4) is formed in the lower side of the ball seat (2) and used for being installed on the lower joint (4) in a matched mode with a shear pin (5).
6. The ball-bundling type check valve for oil-water wells as claimed in claim 5, wherein: the middle part of the ball seat (2) is provided with a conical surface structure (2.6), and sealing is realized through the steel ball (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513165.0U CN215761572U (en) | 2021-07-05 | 2021-07-05 | Ball-bundling type single-flow valve for oil-water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513165.0U CN215761572U (en) | 2021-07-05 | 2021-07-05 | Ball-bundling type single-flow valve for oil-water well |
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| CN215761572U true CN215761572U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121513165.0U Active CN215761572U (en) | 2021-07-05 | 2021-07-05 | Ball-bundling type single-flow valve for oil-water well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417589A (en) * | 2021-07-05 | 2021-09-21 | 山东大东联石油设备有限公司 | Ball-bunching type check valve for oil-water well and method |
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2021
- 2021-07-05 CN CN202121513165.0U patent/CN215761572U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417589A (en) * | 2021-07-05 | 2021-09-21 | 山东大东联石油设备有限公司 | Ball-bunching type check valve for oil-water well and method |
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