High-stability double-acting circulating valve

Abstract

The utility model discloses a high-stability double-acting circulating valve which comprises a circulating valve body, an annular ball seat which can be movably arranged and is connected in a sealing mode is installed in the circulating valve body, an annular locking groove is formed in the annular ball seat, a locking rod which is arranged in a sliding mode is arranged on the circulating valve body in a penetrating mode, and a hemispherical block is fixed to the locking rod. The hemispherical block is partially located in the annular locking groove, a circulating hole is formed in the circulating valve body in a penetrating mode, and the circulating hole is shielded by the annular ball seat and does not communicate with the circulating valve body. Under pressure, the annular lock groove extrudes the hemispherical block to move, so that the lock rod can be driven to move, the sealing ring is extruded to deform and is taken out after being used, the annular ball seat is reset, the device can be reused, and the defect that in the prior art, a shear pin can only be used after being replaced is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of circulation valves, in particular to a double-acting circulation valve with high stability. Background Art

[0002] The circulation valve is a commonly used tool in downhole construction in oil fields. It provides a circulation channel for the pipe string when necessary to achieve the purposes of circulation, well washing, and jam relief, without the need to lift the pipe string to replace the tool.

[0003] The prior art publication number is CN217270128U, which is a double-acting circulation valve, including a circulation valve body, which is a cylindrical structure, hollow inside and open at both ends, a plurality of shear nail holes and a plurality of circulation holes are provided on the outside of the circulation valve body, and the plurality of shear nail holes and the plurality of circulation holes are on the same layer, a first through hole is also provided on the outside of the circulation valve body, a ball seat is provided inside the circulation valve body, a limit platform cooperating with the ball seat is provided inside the circulation valve body, and the limit platform is located between the first through hole and the plurality of shear nail holes.

[0004] The deficiency of the above-mentioned prior art is that, although the ball seat is limited by shear pins, its stability can be ensured, but the difficulty and pressure of cutting the shear pins will be increased, which is not conducive to subsequent circulation and cannot be reused; for this reason, the present application proposes a high-stability double-acting circulation valve. Utility Model Content

[0005] The utility model aims to solve the above technical problems and proposes a high-stability double-acting circulation valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-stability double-acting circulation valve comprises a circulation valve body, wherein an annular ball seat which can be movably arranged and sealed is installed in the circulation valve body, an annular lock groove is provided on the annular ball seat, a slidably arranged lock rod is passed through the circulation valve body, a hemispherical block is fixed on the lock rod, and a part of the hemispherical block is located in the annular lock groove, a circulation hole is passed through the circulation valve body, and the circulation hole is blocked by the annular ball seat and is not connected with the circulation valve body.

[0008] Preferably, a rupture disk is mounted on the circulation valve body.

[0009] Preferably, the inner portion of the end of the annular ball seat away from the rupture disk is provided with an annular conical surface.

[0010] Preferably, a pull block is fixedly connected to the locking rod, a spring is fixed to the pull block, and the other end of the spring is fixedly connected to the circulation valve body.

[0011] Preferably, the inner wall of the circulation valve body is provided with a first annular groove, the outer wall of the annular ball seat is provided with a second annular groove, and a sealing ring is installed between the first annular groove and the second annular groove.

[0012] Preferably, the end of the circulation valve body close to the rupture disk is configured to be reduced in diameter.

[0013] Preferably, it also includes a sealing structure, which is arranged on the annular conical surface.

[0014] Preferably, the sealing structure comprises an annular mounting groove arranged on the annular conical surface, and an annular rubber ring is fixed in the annular mounting groove.

[0015] Preferably, it further comprises a protection structure, wherein the protection structure covers the outside of the pull block, the locking rod and the spring.

[0016] Preferably, the protection structure is a protection cover, which covers the outside of the pull block, the locking rod and the spring, and is fixed on the circulation valve body.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. Pressurize the circulation valve body, and the steel ball and the annular ball seat are driven to move under the action of pressure. Under pressure, the annular lock groove squeezes the hemispherical block to move, thereby driving the lock rod to move, and the sealing ring is squeezed and deformed to realize the movement of the annular ball seat. Finally, the circulation hole is no longer blocked, so that the circulation of the liquid can be realized.

[0019] 2. After use, take it out and reset the annular ball seat, and the device can be used again, avoiding the disadvantage of the prior art that the shear nails must be replaced before it can be used.

[0020] 3. The steel ball falls into the annular ball seat and contacts the annular rubber ring on the annular cone surface. This can increase the sealing between the steel ball and the annular rubber ring, and the annular ball seat can be driven to move more stably through pressure.

[0021] 4. The protective cover is fixed on the circulation valve body to protect the spring, etc.

[0022] To sum up, under pressure, the annular lock groove of the utility model squeezes the hemispherical block to move, thereby driving the lock rod to move, and the sealing ring is squeezed and deformed. After use, it is taken out to reset the annular ball seat, and the device can be used again, avoiding the disadvantage of the prior art that the shear nails must be replaced before it can be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a high-stability double-acting circulation valve proposed in Example 1;

[0024] Figure 2 A side view of a high-stability double-acting circulation valve proposed in Example 1;

[0025] Figure 3 A cross-sectional view of a high-stability double-acting circulation valve proposed in Example 1;

[0026] Figure 4 This is a schematic diagram of the structure of point A in a high-stability double-acting circulation valve proposed in Example 1;

[0027] Figure 5 This is a schematic structural diagram of a high-stability double-acting circulation valve proposed in Example 2.

[0028] Figure 6 This is a schematic structural diagram of a high-stability double-acting circulation valve proposed in Example 3.

[0029] In the figure: 1 circulation valve body, 2 rupture disk, 3 pull block, 4 spring, 5 circulation hole, 6 annular lock groove, 7 annular ball seat, 8 locking rod, 9 hemispherical block, 10 first annular groove, 11 second annular groove, 12 sealing ring, 13 annular mounting groove, 14 annular rubber ring, 15 protective cover. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Example 1

[0032] Reference Figure 1-Figure 4 A high-stability double-acting circulation valve comprises a circulation valve body 1, wherein a rupture disk 2 is installed on the circulation valve body 1; an annular ball seat 7 which can be movably arranged and sealed is installed in the circulation valve body 1, and the inner part of the annular ball seat 7 away from the rupture disk 2 is arranged in an annular cone for receiving a ball; a first annular groove 10 is arranged on the inner wall of the circulation valve body 1, and a second annular groove 11 is arranged on the outer wall of the annular ball seat 7, and a sealing ring 12 is installed between the first annular groove 10 and the second annular groove 11, by setting the first annular groove 10, the second annular groove 11 and the sealing ring 12.

[0033] An annular locking groove 6 is provided on the annular ball seat 7, a sliding locking rod 8 is penetrated through the circulation valve body 1, a hemispherical block 9 is fixed on the locking rod 8, and a part of the hemispherical block 9 is located in the annular locking groove 6, a pull block 3 is fixedly connected to the locking rod 8, a spring 4 is fixed on the pull block 3, and the other end of the spring 4 is fixedly connected to the circulation valve body 1; wherein, one end of the circulation valve body 1 close to the rupture disk 2 is configured to be reduced in diameter, so that the annular ball seat 7 can be supported and limited, and the rupture disk 2 is not blocked at this time.

[0034] A circulation hole 5 is provided through the circulation valve body 1, and the circulation hole 5 is blocked by the annular ball seat 7 and is not connected to the circulation valve body 1; when the downhole tool string of the oil pipe is blocked, a steel ball can be dropped from the ground into the circulation valve body 1 and fall on the annular ball seat 7, and the ball and the annular cone surface are against each other, so that the annular ball seat 7 can be blocked, and then pressure is applied to the circulation valve body 1, and the steel ball and the annular ball seat 7 are driven to move under the action of pressure. Under pressure, the annular lock groove 6 squeezes the hemispherical block 9 to move, thereby driving the lock rod 8 to move, and the sealing ring 12 is squeezed and deformed to realize the movement of the annular ball seat 7, and finally the circulation hole 5 is no longer blocked, so that the circulation of the liquid can be realized;

[0035] After use, the device is taken out and the annular ball seat 7 is reset, and the device can be used again, thus avoiding the disadvantage of the prior art that the shear nails must be replaced before the device can be used.

[0036] Example 2

[0037] Reference Figure 5 The present embodiment is different from the first embodiment in that the present embodiment further comprises a sealing structure, which is arranged on the annular conical surface. The sealing structure comprises an annular mounting groove 13 arranged on the annular conical surface, and an annular rubber ring 14 is fixed in the annular mounting groove 13;

[0038] The steel ball falls into the annular ball seat 7 and contacts the annular rubber ring 14 on the annular cone surface, thereby increasing the sealing performance between the steel ball and the annular rubber ring 14 and driving the annular ball seat 7 to move more stably through pressure.

[0039] Example 3

[0040] Reference Figure 6 The difference between this embodiment and embodiments 1 and 2 is that this embodiment also includes a protective structure, which covers the outside of the pull block 3, the locking rod 8 and the spring 4. The protective structure is a protective cover 15, which covers the outside of the pull block 3, the locking rod 8 and the spring 4, and is fixed on the circulation valve body 1, so as to protect the spring 4 and the like.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-stability double-acting circulation valve, comprising a circulation valve body (1), characterized in that: An annular ball seat (7) that can be movably arranged and sealed is installed in the circulation valve body (1), an annular locking groove (6) is provided on the annular ball seat (7), a slidably arranged locking rod (8) is passed through the circulation valve body (1), a hemispherical block (9) is fixed on the locking rod (8), and a part of the hemispherical block (9) is located in the annular locking groove (6), and a circulation hole (5) is passed through the circulation valve body (1), and the circulation hole (5) is blocked by the annular ball seat (7) and is not connected to the circulation valve body (1).

2. A high-stability double-acting circulation valve according to claim 1, characterized in that: A rupture disk (2) is installed on the circulation valve body (1).

3. A high-stability double-acting circulation valve according to claim 1, characterized in that: The inner portion of the end of the annular ball seat (7) away from the rupture disk (2) is provided with an annular conical surface.

4. A high-stability double-acting circulation valve according to claim 1, characterized in that: A pull block (3) is fixedly connected to the locking rod (8), a spring (4) is fixed to the pull block (3), and the other end of the spring (4) is fixedly connected to the circulation valve body (1).

5. A high-stability double-acting circulation valve according to claim 1, characterized in that: The inner wall of the circulation valve body (1) is provided with a first annular groove (10), the outer wall of the annular ball seat (7) is provided with a second annular groove (11), and a sealing ring (12) is installed between the first annular groove (10) and the second annular groove (11).

6. A high-stability double-acting circulation valve according to claim 1, characterized in that: The end of the circulation valve body (1) close to the rupture disk (2) is configured to be of reduced diameter.

7. A high stability double-acting circulation valve according to claim 1, characterized in that: The invention also comprises a sealing structure, wherein the sealing structure is arranged on the annular conical surface.

8. A high-stability double-acting circulation valve according to claim 7, characterized in that: The sealing structure comprises an annular mounting groove (13) arranged on the annular conical surface, and an annular rubber ring (14) is fixed in the annular mounting groove (13).

9. A high-stability double-acting circulation valve according to claim 4, characterized in that: It also comprises a protective structure, which covers the outside of the pull block (3), the locking rod (8) and the spring (4).

10. A high-stability double-acting circulation valve according to claim 9, characterized in that: The protective structure is a protective cover (15), which covers the outside of the pull block (3), the locking rod (8) and the spring (4), and is fixed on the circulation valve body (1).

Images