A screw pump anchoring device capable of pressure testing

Abstract

The present invention relates to the technical field of screw pump anchors, and specifically to a screw pump anchoring device capable of pressure testing, comprising an upper joint, an upper center tube, a lower center tube and a lower joint, wherein a pressure testing assembly is installed at a location of the upper center tube close to the lower center tube, a seat sealing assembly is installed on the outer wall of the upper center tube, a straightening assembly is installed on the outer wall of the lower center tube, a driving member is installed between the seat sealing assembly and the straightening assembly, the driving member is transmission-connected to the upper center tube, one end of the driving member is transmission-connected to the seat sealing assembly, and the other end is sleeved with a torque tube, and an end of the torque tube away from the driving member is fixedly connected to the straightening assembly, the upper center tube is driven to rotate through the upper joint, the upper center tube drives the driving member to rotate on the torque tube, and under the influence of the torque tube, the driving member moves upward to control the seat sealing assembly to work and complete the seat sealing work. The device realizes two processes of completing the pressure testing and anchoring of the pipe column in one trip.

Description

Technical Field

[0001] The invention relates to the technical field of screw pump anchors, and in particular to a pressure-testable screw pump anchoring device. Background Art

[0002] A Chinese patent (application number: CN202310218322.2) discloses a "pressure test anchor integrated screw pump anchor". During on-site use, the tool must be pressure tested before it can be set. The pressure must be raised to 12MPa to break the pressure test shear pins at the ball seat, and then the rotary seal can be performed. The pressure requirement is high, and the high pressure does not meet the on-site safety requirements. After the sealing is completed, the ball seat and the ball are not detached, but the ball cover and the ball seat move relative to each other. The seal between the ball cover and the ball seat fails, and the oil casing is connected, but the ball is still in the ball seat. The well fluid must pass through the ball seat to enter the screw pump, and the flow area is small.

[0003] The existing pressure test anchor integrated screw pump anchor has a complex structure, large length and volume, and is difficult to transport and install. When operators use the tools, professional technicians must be on site to guide the pressure test and seal, and the tool cost and usage cost are both high. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a pressure-testable screw pump anchoring device to solve the problem that the internal flow area of ​​a screw pump anchor with integrated pressure testing anchoring is small, which affects the working efficiency of the screw pump.

[0005] Based on the above purpose, the present invention provides a pressure-testable screw pump anchoring device, comprising an upper joint, an upper center tube, a lower center tube and a lower joint, wherein one end of the upper joint is sleeved on one end of the upper center tube, the upper joint is fixedly connected to the upper center tube, the other end of the upper center tube is fixedly connected to one end of the lower center tube, the other end of the lower center tube is inserted into one end of the lower joint, the lower center tube is fixedly connected to the lower joint, a pressure test assembly is installed at a place of the upper center tube near the lower center tube, a sealing assembly is installed on the outer wall of the upper center tube, a straightening assembly is installed on the outer wall of the lower center tube, a driving member is installed between the sealing assembly and the straightening assembly, the driving member is transmission-connected to the upper center tube, one end of the driving member is transmission-connected to the sealing assembly, and the other end is sleeved with a torque tube, and the end of the torque tube away from the driving member is fixedly connected to the straightening assembly;

[0006] The upper center tube is driven to rotate by the upper joint, and the upper center tube drives the driving member to rotate on the torque tube. Affected by the torque tube, the driving member moves upward to control the operation of the setting assembly and complete the setting work.

[0007] Preferably, a plurality of sealing rubber rings are provided between the upper joint and the upper center tube, and each of the sealing rubber rings is clamped in the upper center tube to improve the sealing between the upper joint and the upper center tube.

[0008] Preferably, the pressure test assembly comprises:

[0009] A locking block groove is arranged on the outer wall of the upper central tube;

[0010] A pressure test plug is arranged inside the upper center pipe;

[0011] The pressure test locking block is arranged in the locking block groove, and one end of the pressure test locking block is inserted into the pressure test plug.

[0012] Preferably, the setting assembly comprises:

[0013] A cone, one end of which is sleeved on the upper joint, and the other end of which is sleeved on the upper center pipe, and the cone is fixedly connected to the upper joint by a pin;

[0014] The cavat is sleeved on the upper center tube, one end of the cavat is drivingly connected to the driving member, and the other end is slidingly connected to be provided with a plurality of anchor shoes, and the end of each anchor shoe away from the cavat fits the conical surface of the cone.

[0015] Preferably, a plurality of steel balls are provided between the cone and the upper center tube, and the steel balls are used to reduce friction between the cone and the upper center tube.

[0016] Preferably, the driving member comprises:

[0017] A track tube, sleeved on the upper center tube, one end of the track tube is fixedly connected to the cavatole, and the other end is arranged in the torque tube;

[0018] At least one upper shaft rod is arranged in the track tube, and one end of the upper shaft rod is inserted into the outer wall of the upper center tube;

[0019] An upper shaft ring, arranged at the bottom of the upper shaft rod;

[0020] At least one lower shaft rod is arranged in the track tube, one end of the lower shaft rod is passed through the torque tube, and the other end of the lower shaft rod abuts against the upper center tube;

[0021] A lower shaft ring, arranged at the bottom of the lower shaft rod;

[0022] A retaining ring, sleeved on the torque tube, the retaining ring is located at a point where the lower shaft passes through the torque tube, and the retaining ring is fixedly connected to the torque tube;

[0023] Wherein, the track tube includes a 45° inclined track and a straight track, the upper shaft rod and the upper shaft ring are arranged in the 45° inclined track, and the lower shaft rod and the lower shaft ring are arranged in the straight track.

[0024] Preferably, the straightening assembly comprises:

[0025] A centralizing body, which is sleeved on the lower center tube, one end of which is sleeved on the torque tube, and the other end is fitted with the lower joint, the centralizing body is fixedly connected to the torque tube, and an annular mounting groove is provided on the outer wall of the centralizing body;

[0026] An upper pressure ring, one end of which is sleeved on the torque tube and the other end of which is sleeved on the centralizing body, the upper pressure ring is fixedly connected to the centralizing body, and one end of the upper pressure ring extends out of the annular mounting groove for a distance;

[0027] A lower pressure ring is sleeved on one end of the centralizing body close to the lower joint, and one end of the lower pressure ring extends out of the annular mounting groove for a certain distance;

[0028] Multiple righting flaps are arranged in the annular mounting groove, and the two ends of each righting flap are respectively abutted against the inner wall of the upper pressure ring and the inner wall of the lower pressure ring. At least two righting springs are arranged inside each righting flap, and one end of each righting spring passes through the righting flap and abuts against the annular mounting groove.

[0029] Preferably, the outer surface of the straightening flap is provided with stepped edges.

[0030] Beneficial effects of the present invention:

[0031] 1. The device can complete two processes, namely, pipe pressure testing and pipe anchoring, in one trip;

[0032] 2. This device can effectively avoid the bending and eccentric wear of the pipe column caused by conventional anchor pressure anchoring;

[0033] 3. The device converts the rotational force into anchoring force, and there is no anchoring instability;

[0034] 4. The unsealing method of the device is that the tool automatically unseales after the pipe string is lifted to release the torque. The unsealing method is simple and easy to operate;

[0035] 5. The device has a simple structure and is easy to use, which improves the work efficiency of on-site operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present invention;

[0038] Figure 2 It is a schematic cross-sectional top view of the righting flap according to an embodiment of the present invention.

[0039] The markings in the figure are:

[0040] 1. Upper joint; 2. Cone; 3. Pin; 4. Steel ball; 5. Anchor shoe; 6. Upper center tube; 7. Cava holder; 8. Track tube; 9. Upper shaft rod; 10. Upper shaft ring; 11. Retaining ring; 12. Torque tube; 13. Pressure test lock block; 14. Upper pressure ring; 15. Pressure test plug; 16. Righting spring; 17. Righting flap; 18. Righting body; 19. Lower pressure ring; 20. Lower center tube; 21. Lower joint; 22. Sealing rubber ring; 23. Start shear pin; 24. Lower shaft rod; 25. Lower shaft ring. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] like Figure 1 and Figure 2As shown, a pressure-testable screw pump anchoring device comprises an upper joint 1, an upper center tube 6, a lower center tube 20 and a lower joint 21, one end of the upper joint 1 is sleeved on one end of the upper center tube 6, the upper joint 1 is fixedly connected to the upper center tube 6, the other end of the upper center tube 6 is fixedly connected to one end of the lower center tube 20, the other end of the lower center tube 20 is inserted on one end of the lower joint 21, the lower center tube 20 is fixedly connected to the lower joint 21, a pressure test assembly is installed at a location of the upper center tube 6 close to the lower center tube 20, a sealing assembly is installed on the outer wall of the upper center tube 6, a straightening assembly is installed on the outer wall of the lower center tube 20, a driving member is installed between the sealing assembly and the straightening assembly, the driving member is transmission-connected to the upper center tube 6, one end of the driving member is transmission-connected to the sealing assembly, the other end is sleeved with a torque tube 12, and the end of the torque tube 12 away from the driving member is fixedly connected to the straightening assembly;

[0044] The upper center tube 6 is driven to rotate by the upper joint 1, and the upper center tube 6 drives the driving member to rotate on the torque tube 12. Affected by the torque tube 12, the driving member moves upward to control the operation of the setting assembly and complete the setting work.

[0045] For example, by setting a pressure test component in the upper center pipe 6 and connecting the pump truck to the oil pipe for positive pressure testing, the pipe column can be pressure tested at any time. Under the condition of meeting the on-site use, there is no requirement for the pressure test pressure. When the oil pipe is rotated forward, the straightening component relies on the friction with the casing to fix it, and the pipe column continues to rotate forward. The upper joint 1 drives the upper center pipe 6, the lower center pipe 20 and the lower joint 21 to rotate, and the upper center pipe 6 drives the driving member to rotate, so that the driving member pushes the sealing assembly to work to complete the sealing work. The torque of the upper pipe column is released, and the driving member loses the torque and automatically moves downward due to gravity. The sealing assembly is reset to complete the unsealing work.

[0046] As an optional embodiment, a plurality of sealing rubber rings 22 are provided between the upper joint 1 and the upper center tube 6 , and each of the sealing rubber rings 22 is clamped in the upper center tube 6 to improve the sealing between the upper joint 1 and the upper center tube 6 .

[0047] As an optional embodiment, the pressure test assembly includes:

[0048] A locking block groove is provided on the outer wall of the upper central tube 6;

[0049] A pressure test plug 15 is arranged inside the upper center pipe 6;

[0050] The pressure test locking block 13 is disposed in the locking block groove, and one end of the pressure test locking block 13 is inserted into the pressure test plug 15 .

[0051] For example, after the sealing is completed, the pressure test plug 15 can fall off to increase the flow space.

[0052] As an optional embodiment, the setting assembly includes:

[0053] A cone 2, one end of which is sleeved on the upper joint 1, and the other end of which is sleeved on the upper center pipe 6, and the cone 2 is fixedly connected to the upper joint 1 through a pin 3;

[0054] The cavator 7 is sleeved on the upper center tube 6, one end of the cavator 7 is transmission-connected to the driving member, and the other end is slidingly connected to be provided with a plurality of anchor shoes 5, and one end of each anchor shoe 5 away from the cavator 7 is in contact with the conical surface of the cone 2.

[0055] For example, the upper center tube 6 drives the driving member to rotate, and the driving member generates thrust through the rotation, pushing the cavatole 7 to move upward, and the cavatole 7 drives the anchor shoe 5 to move up along the conical surface of the cone 2, so that the anchor shoe 5 is deployed to complete the sealing action, and vice versa, the unsealing action is completed.

[0056] As an optional embodiment, a plurality of steel balls 4 are provided between the cone 2 and the upper center tube 6 , and the steel balls 4 are used to reduce the friction between the cone 2 and the upper center tube 6 .

[0057] As an optional embodiment, the driving member includes:

[0058] A track tube 8 is sleeved on the upper center tube 6, one end of the track tube 8 is fixedly connected to the cavatole 7, and the other end is arranged in the torque tube 12;

[0059] At least one upper shaft rod 9 is arranged in the track tube 8, and one end of the upper shaft rod 9 is inserted into the outer wall of the upper center tube 6;

[0060] An upper shaft ring 10 is arranged at the bottom of the upper shaft rod 9;

[0061] At least one lower shaft rod 24 is disposed in the track tube 8, one end of the lower shaft rod 24 is passed through the torque tube 12, and the other end abuts against the upper center tube 6;

[0062] A lower shaft ring 25 is arranged at the bottom of the lower shaft rod 24;

[0063] A retaining ring 11 is sleeved on the torque tube 12, the retaining ring 11 is located at a place where the lower shaft 24 passes through the torque tube 12, and the retaining ring 11 is fixedly connected to the torque tube 12;

[0064] The track tube 8 includes a 45° inclined track and a straight track, the upper shaft rod 9 and the upper shaft ring 10 are arranged in the 45° inclined track, and the lower shaft rod 24 and the lower shaft ring 25 are arranged in the straight track.

[0065] For example, there are two kinds of track grooves on the surface of the track tube 8. The upper shaft rod 9 and the upper shaft ring 10 are in the 45° inclined track of the track tube 8. The lower shaft rod 24 and the lower shaft ring 25 are connected to the straight track of the track tube 8 by being installed in the torque tube 12. The lower shaft rod 24 and the lower shaft ring 25 prevent the track tube 8 from idling when it is forced to move upward, ensuring that the track tube 8 can only move up and down. When the upper center tube 6 rotates, the torque is transmitted to the track tube 8 through the upper shaft rod 9 and the upper shaft ring 10. The track tube 8 is forced to move upward along the 45° inclined track, pushing the cavatole 7 upward, pushing the anchor shoe 5 outward along the cone 2, completing the sealing action, and the lifting column torque is released. The track tube 8 loses the torque and automatically moves downward due to gravity. The cavatole 7 loses support and drives the anchor shoe 5 to retract along the cone 2, completing the unsealing action.

[0066] As an optional embodiment, the straightening assembly includes:

[0067] A centralizing body 18 is sleeved on the lower center tube 20, one end of the centralizing body 18 is sleeved on the torque tube 12, and the other end is fitted with the lower joint 21. The centralizing body 18 is fixedly connected to the torque tube 12, and an annular mounting groove is provided on the outer wall of the centralizing body 18;

[0068] An upper pressure ring 14, one end of which is sleeved on the torque tube 12, and the other end of which is sleeved on the centralizing body 18, the upper pressure ring 14 is fixedly connected to the centralizing body 18, and one end of the upper pressure ring 14 extends out of the annular mounting groove for a distance;

[0069] A lower pressure ring 19 is sleeved on one end of the centralizing body 18 close to the lower joint 21, and one end of the lower pressure ring 19 extends out of the annular mounting groove for a certain distance;

[0070] A plurality of straightening flaps 17 are arranged in the annular mounting groove, and the two ends of each straightening flap 17 are respectively abutted against the inner wall of the upper pressure ring 14 and the inner wall of the lower pressure ring 19, and at least two straightening springs 16 are arranged inside each straightening flap 17, and one end of each straightening spring 16 passes through the straightening flap 17 and abuts against the annular mounting groove.

[0071] As an optional embodiment, the outer surface of the straightening flap 17 is provided with stepped edges.

[0072] For example, when the oil pipe is rotated forward, the tool's straightening flap 17 relies on the friction force with the casing to keep it fixed, and the torque tube 12, straightening body 18, lower pressure ring 19, retaining ring and upper pressure ring 14 connected to the straightening flap 17 also do not move. The surface of the straightening flap 17 has more than two stepped edges, which can not only straighten the tool, but also lock the tool from rotating horizontally.

[0073] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure-testable screw pump anchoring device, comprising an upper joint (1), an upper center tube (6), a lower center tube (20) and a lower joint (21), wherein one end of the upper joint (1) is sleeved on one end of the upper center tube (6), the upper joint (1) is fixedly connected to the upper center tube (6), the other end of the upper center tube (6) is fixedly connected to one end of the lower center tube (20), the other end of the lower center tube (20) is inserted into one end of the lower joint (21), and the lower center tube (20) is fixedly connected to the lower joint (21), characterized in that: A pressure test assembly is installed at a location of the upper center tube (6) near the lower center tube (20), a seat seal assembly is installed on the outer wall of the upper center tube (6), and a straightening assembly is installed on the outer wall of the lower center tube (20), a driving member is installed between the seat seal assembly and the straightening assembly, the driving member is transmission-connected to the upper center tube (6), one end of the driving member is transmission-connected to the seat seal assembly, and the other end is sleeved with a torque tube (12), and the end of the torque tube (12) away from the driving member is fixedly connected to the straightening assembly; The upper center tube (6) is driven to rotate by the upper joint (1), and the upper center tube (6) drives the driving member to rotate on the torque tube (12). Under the influence of the torque tube (12), the driving member moves upward to control the operation of the sealing assembly and complete the sealing operation. The pressure test assembly comprises: A locking block groove is provided on the outer wall of the upper center tube (6); A pressure test plug (15) is arranged inside the upper center tube (6); A pressure test locking block (13) is arranged in the locking block groove, and one end of the pressure test locking block (13) is inserted into the pressure test plug (15); The sealing assembly comprises: A cone (2), one end of which is sleeved on the upper joint (1) and the other end of which is sleeved on the upper center tube (6), and the cone (2) is fixedly connected to the upper joint (1) via a pin (3); A cava holder (7) is sleeved on the upper central tube (6), one end of the cava holder (7) is drivingly connected to the driving member, and the other end is slidably connected to a plurality of anchor shoes (5), and the end of each anchor shoe (5) away from the cava holder (7) is in contact with the conical surface of the cone (2); The righting assembly comprises: a centralizing body (18) sleeved on the lower center tube (20), one end of the centralizing body (18) sleeved on the torque tube (12), and the other end of the centralizing body (18) being arranged in close contact with the lower joint (21), the centralizing body (18) being fixedly connected to the torque tube (12), and an annular mounting groove being provided on the outer wall of the centralizing body (18); An upper pressure ring (14), one end of which is sleeved on the torque tube (12) and the other end of which is sleeved on the centralizing body (18), the upper pressure ring (14) is fixedly connected to the centralizing body (18), and one end of the upper pressure ring (14) extends out of the annular mounting groove for a distance; A lower pressure ring (19) is sleeved on one end of the centralizing body (18) close to the lower joint (21), and one end of the lower pressure ring (19) extends out of the annular mounting groove for a certain distance; A plurality of righting flaps (17) are arranged in the annular mounting groove, and the two ends of each righting flap (17) are respectively abutted against the inner wall of the upper pressure ring (14) and the inner wall of the lower pressure ring (19), and at least two righting springs (16) are arranged inside each righting flap (17), and one end of each righting spring (16) passes through the righting flap (17) and abuts against the annular mounting groove.

2. A pressure-testable screw pump anchoring device according to claim 1, characterized in that: A plurality of sealing rubber rings (22) are provided between the upper joint (1) and the upper center tube (6), and each of the sealing rubber rings (22) is clamped in the upper center tube (6) to improve the sealing performance between the upper joint (1) and the upper center tube (6).

3. A pressure-testable screw pump anchoring device according to claim 1, characterized in that: A plurality of steel balls (4) are provided between the cone (2) and the upper center tube (6), and the steel balls (4) are used to reduce friction between the cone (2) and the upper center tube (6).

4. A pressure-testable screw pump anchoring device according to claim 1, characterized in that: The driving member comprises: A track tube (8) is sleeved on the upper center tube (6), one end of the track tube (8) is fixedly connected to the cavatole (7), and the other end is arranged in the torque tube (12), and the torque tube (12) is fixedly connected to the track tube (8) by starting shear nails (23); At least one upper shaft rod (9) is inserted into the track tube (8), and one end of the upper shaft rod (9) is inserted into the outer wall of the upper center tube (6); An upper shaft ring (10) is arranged at the bottom of the upper shaft rod (9); At least one lower shaft rod (24) is arranged in the track tube (8), one end of the lower shaft rod (24) is passed through the torque tube (12), and the other end abuts against the upper center tube (6); A lower shaft ring (25) is arranged at the bottom of the lower shaft rod (24); a retaining ring (11) sleeved on the torque tube (12), the retaining ring (11) being located at a point where the lower shaft (24) passes through the torque tube (12), and the retaining ring (11) is fixedly connected to the torque tube (12); The track tube (8) comprises a 45° inclined track and a straight track, the upper shaft rod (9) and the upper shaft ring (10) are arranged in the 45° inclined track, and the lower shaft rod (24) and the lower shaft ring (25) are arranged in the straight track.

5. The pressure-testable screw pump anchoring device according to claim 1, characterized in that: The outer surface of the straightening flap (17) is provided with stepped edges and corners.

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