Blowout prevention connecting-tripping device with pressure relief channel

Abstract

The utility model discloses a blowout prevention connecting-tripping device with a pressure relief channel, and belongs to the technical field of oil field oil extraction. Comprising a supporting sleeve and a spring B which are arranged on a lock sleeve in a sleeving mode, long holes in the lock sleeve and the supporting sleeve are staggered in position, liquid cannot pass through a gap in the contact position of the lock sleeve and the supporting sleeve, and after the spring B is compressed, a long hole D in the lock sleeve and a long hole E in the supporting sleeve coincide. The channel enables high-pressure liquid on the left side to be discharged to the right side through a gap between the lock sleeve and the center rod and a hole in the lock sleeve. The pressure relief channel solves the problem of quick pressure relief in the release process of the blowout prevention connecting-tripping device, has the characteristics of large open area and quick pressure relief, can ensure quick release and butt joint in the use process, and eliminates the tedious process of pump truck pressing.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil field production, and particularly relates to a blowout prevention disconnector with a pressure relief channel. Background Art

[0002] The disconnector is an indispensable tool in the process of using the pumping unit to produce oil in the oil field. The disconnector is used to connect the plunger and the sucker rod of the oil pump, and plays an important role in connecting the upper and lower parts of the oil production operation. At present, the blowout preventer disconnector generally has the problem that the pressure at the lower part of the disconnector cannot be quickly released to the upper part during the docking process, causing the disconnector to be stuck in the pump port and unable to be quickly released. It is also necessary to use a pump truck at the wellhead to balance the pressure above and below the disconnector before docking, which prolongs the construction period, delays the time to production, and reduces economic benefits. Summary of the invention

[0003] In view of the above shortcomings, the purpose of the utility model is to provide a blowout prevention disconnector with a pressure relief channel.

[0004] The technical scheme adopted by the utility model is: an anti-blowout disconnector with a pressure relief channel, the technical key points of which are: comprising a locking sleeve and a supporting sleeve sleeved outside the center rod, the supporting sleeve and a spring B sleeved on the locking sleeve in sequence, and the spring B is arranged between the edge of the supporting sleeve and the outer protrusion of the locking sleeve, the guide nail passes through the long hole on the supporting sleeve and is fixed on the locking sleeve by threads, so that the positions of the long holes on the locking sleeve and the supporting sleeve are staggered, and the gap at the contact point between the locking sleeve and the supporting sleeve prevents liquid from passing; the supporting sleeve and the locking sleeve are connected to the sealing cylinder; the spring A sleeves on the center rod and is inserted into the supporting sleeve at the same time, the claws are connected to the center rod by threads, and the claws are opened by the supporting sleeve and are clamped with the inner wall of the sealing cylinder, and at the same time, under the elastic force of the spring A, the outer boss on the support sleeve is pressed against the inner boss of the sealing cylinder, so that liquid cannot pass.

[0005] In the above scheme, after the spring B is compressed, the long hole D on the locking sleeve and the long hole E on the supporting sleeve overlap, forming a channel for the high-pressure liquid on the left to leak to the right through the gap between the locking sleeve and the center rod and the hole on the locking sleeve.

[0006] The beneficial effect of the utility model is that the blowout prevention disconnector with a pressure relief channel includes a support sleeve and a spring B mounted on the lock sleeve, the positions of the long holes on the lock sleeve and the support sleeve are staggered, and the gap at the contact between the lock sleeve and the support sleeve prevents liquid from passing through. After compressing the spring B, the long hole D on the lock sleeve and the long hole E on the support sleeve overlap, forming a channel for the high-pressure liquid on the left to be discharged to the right through the gap between the lock sleeve and the center rod and the hole on the lock sleeve. It solves the problem of rapid pressure relief of the blowout prevention disconnector during the release process. The pressure relief channel has the characteristics of large flow area and rapid pressure relief, which can ensure rapid release and docking during use, eliminating the cumbersome process of pump truck pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 This is a schematic diagram of the structure of the anti-blowout disconnector in the embodiment of the utility model;

[0009] Figure 2 This is a schematic diagram of the lock sleeve structure in the embodiment of the utility model;

[0010] Figure 3 This is a schematic diagram of the claw structure in the embodiment of the utility model;

[0011] Figure 4 This is a schematic diagram of the support sleeve structure in an embodiment of the utility model;

[0012] The serial numbers in the figure are explained as follows: 1 center rod, 2 clamping claw, 3 spring A, 4 sealing cylinder, 5 support sleeve, 6 locking sleeve, 7 guide pin, 8 spring B, 9 limit short circuit, 10 docking claw. DETAILED DESCRIPTION

[0013] To make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figure 1-Figure 4 The utility model is further described in detail with specific implementation methods.

[0014] In this embodiment, a blowout prevention connector with a pressure relief channel includes a lock sleeve 6 and a support sleeve 5, both of which are sleeved on the center rod 1. The left sleeve at one end of the lock sleeve 6 in this embodiment has a long hole E, whose diameter is slightly larger than the center rod 1. After the lock sleeve 6 is sleeved on the outside of the center rod 1, there is a channel for liquid flow between the two. The right sleeve at the other end of the lock sleeve 6 has a diameter larger than the left sleeve, and the end of the right sleeve has a clamping surface connected to the inner boss of the tight sealing cylinder 4. The support sleeve 5 has a long hole D and a long hole C, and the end of the right side has an outer protrusion B that is clamped to another inner boss of the tight sealing cylinder 4. A plurality of clamping claw arms are provided in the circumference of the clamping claw 2, and the clamping claw arms are elastic.

[0015] The support sleeve 5 and spring B8 of this embodiment are respectively sleeved on the lock sleeve 6, and the guide pin 7 passes through the long hole C on the support sleeve 5 and is fixed on the lock sleeve 6 by threads, so that the long hole E on the lock sleeve 6 and the long hole D on the support sleeve 5 are staggered. At the same time, since the gap between the lock sleeve 6 and the support sleeve 5 is very small, liquid cannot pass through, which plays a role in preventing spraying. The spring B8, lock sleeve 6, support sleeve 5, and guide pin 7 components are simultaneously installed in the sealing cylinder 4. Since the gap between the support sleeve 5 and the center rod 1 is very small, liquid cannot pass through, which plays a role in preventing spraying. The spring A3 is sleeved on the center rod 1 and inserted into the support sleeve 5 at the same time. The claw 2 is connected to the center rod 1 by threads, and the outer convex end H of the claw arm is stretched open by the support sleeve 5 and then clamped at the inner protrusion F of the sealing cylinder 4. At the same time, under the elastic force of the spring A, the outer protrusion B on the support sleeve 5 is pressed against the inner boss A of the sealing cylinder 4, so that liquid cannot pass through, which plays a role in preventing spraying. The limit short circuit 9 and the docking claw 10 are connected by threads.

[0016] The working principle of the blowout prevention disconnector with pressure relief channel used in this embodiment is as follows:

[0017] The tool presses Figure 1 The various parts are connected as shown and lowered into the well. During the process of lowering into the well, when the docking claw 10 contacts the locking sleeve 6, the spring B8 is compressed, and the locking sleeve 6 moves to the left, so that the long hole E on the locking sleeve 6 coincides with the long hole D on the support sleeve 5, so that the high-pressure liquid on the left side is discharged to the right side through the gap between the locking sleeve 6 and the center rod 1 and the long hole E on the locking sleeve 6. The leftward movement of the locking sleeve 6 will push the end B of the support sleeve 5 to separate from the contact point of the sealing cylinder 4, further increasing the flow area and accelerating the pressure relief process of the high-pressure liquid. Pressing the locking sleeve 6 simultaneously moves the support sleeve 5 to the left. When the contact point of the support sleeve 5 and the clamping claw 2 separates, the clamping claw 2 retracts under the action of the gravity of the oil pump injection plug, and falls to the bottom of the pump after being separated from the sealing cylinder 4, completing the release at the pump port. The docking claw 10 continues to descend to the bottom of the pump to complete the docking and normal production.

[0018] When the disconnector needs to be disengaged, the tool can be disengaged by simply lifting it into the sealing tube 4, and the claw 2 continues to hang at the position shown in the figure, thereby playing a multiple anti-spraying role.

[0019] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A blowout prevention disconnector with a pressure relief channel, characterized in that: It comprises a locking sleeve (6) and a supporting sleeve (5) which are sleeved outside the center rod (1). The support sleeve (5) and the spring B (8) are sequentially sleeved on the lock sleeve (6), and the spring B (8) is arranged between the edge of the support sleeve (5) and the outer protrusion of the lock sleeve (6). The guide pin (7) passes through the long hole on the support sleeve (5) and is fixed to the lock sleeve (6) by screw threads, so that the positions of the long holes on the lock sleeve (6) and the support sleeve (5) are staggered, and the lock sleeve (6) and the support sleeve (5) are in contact with each other; the support sleeve (5) and the lock sleeve (6) are connected to the sealing cylinder (4); the spring A (3) is sleeved on the center rod (1) and inserted into the support sleeve (5), the claw (2) is connected to the center rod (1) by screw threads, and the claw (2) is opened by the support sleeve (5) so that the claw (2) is clamped with the inner wall of the sealing cylinder (4), and at the same time, under the elastic force of the spring A (3), the outer boss on the support sleeve (5) is tightly attached to the inner boss of the sealing cylinder (4), so that liquid cannot pass through.

2. The blowout prevention disconnector with a pressure relief channel according to claim 1, characterized in that: After the spring B (8) is compressed, the long hole D on the locking sleeve (6) and the long hole E on the supporting sleeve (5) overlap, forming a channel for the high-pressure liquid on the left side to leak to the right side through the gap between the locking sleeve and the center rod and the hole on the locking sleeve (6).

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