Sleeve support

Abstract

The utility model provides a casing pipe supporting device. The casing pipe supporting device comprises a supporting shaft (1), a centralizing sleeve (2), a locking block (3), a sliding ring (4), a spring (5) and a fastening sleeve (6). The supporting shaft (1) is of a first cylindrical structure; the centralizing sleeve (2) is sleeved outside the supporting shaft (1) and is positioned below the supporting shaft (1), and an opening (20) and a pin hole (22) through which the soluble pin can penetrate are formed in the centralizing sleeve (2); the locking block (3) is arranged between the supporting shaft (1) and the centralizing sleeve (2) through a soluble pin, and a spring bolt (30) which goes in and out of the opening (20) is arranged on the locking block (3); the sliding ring (4) is sleeved outside the supporting shaft (1) and is propped against the inner wall of the locking block (3) through a spring (5); and the fastening sleeve (6) is arranged below the centralizing sleeve (2) and is sleeved outside the centralizing sleeve (2). The anti-creeping device has the advantages that when the anti-creeping device is connected to the bottom of an oil pipe, pipe column creeping of the oil pipe caused by factors such as pressure fluctuation, load change and temperature change can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production, in particular to a casing supporter. Background Art

[0002] Currently, during oil field production or injection construction, changes in load, pressure, and temperature cause the oil pipe to creep for a long time and damage downhole tools such as packers, thereby greatly increasing production and maintenance costs and reducing production efficiency.

[0003] In summary, the existing technology has the following problems: during oil production or injection construction in an oil field, the oil pipe creeps for a long time and damages downhole tools such as packers. Utility Model Content

[0004] The utility model provides a casing supporter, which can prevent the destruction of production caused by creep of oil pipes during the production of oil and water wells.

[0005] To this end, the present invention proposes a casing support, which includes:

[0006] Support shaft 1, centralizing sleeve 2, locking block 3, slip ring 4, spring 5 and fastening sleeve 6;

[0007] The support shaft 1 is a first cylindrical structure;

[0008] The centralizing sleeve 2 is sleeved outside the support shaft 1 and is located below the support shaft 1. The centralizing sleeve 2 is provided with an opening 20 and a pin hole 22 for the soluble pin to pass through;

[0009] The locking block 3 is arranged between the support shaft 1 and the straightening sleeve 2 by means of a soluble pin, and the locking block 3 is provided with a locking tongue 30 for entering and exiting the opening 20;

[0010] The slip ring 4 is sleeved on the outside of the support shaft 1 and pressed against the inner wall of the locking block 3 through the spring 5;

[0011] The fastening sleeve 6 is arranged below the straightening sleeve 2 and sleeved outside the straightening sleeve 2 .

[0012] Furthermore, the centralizing sleeve 2 is a second cylindrical structure, and the opening 20 is provided in the middle portion of the side wall of the centralizing sleeve 2 .

[0013] Furthermore, there are multiple openings 20.

[0014] Furthermore, the number of the openings 20 is three, and they are spaced apart along the circumference of the centralizing sleeve 2 .

[0015] Furthermore, the opening 20 is rectangular.

[0016] Furthermore, the locking block 3 includes an upper locking block, an intermediate locking block and a lower locking block that are connected to each other. The inner walls of the upper locking block and the lower locking block are respectively fitted with the outer wall of the support shaft 1, and the inner wall of the intermediate locking block is fitted with the outer wall of the slip ring 4.

[0017] Furthermore, the soluble pin is pressed against the outer wall of the upper end locking block.

[0018] Furthermore, the locking tongue 30 is in the shape of a truncated cone.

[0019] Furthermore, screw holes are provided on the fastening sleeve 6 , and the bottom of the straightening sleeve 2 is surrounded between the support shaft 1 and the fastening sleeve 6 by screws.

[0020] Furthermore, the fastening sleeve 6 is sleeved on the outside of the support shaft 1 through a threaded connection.

[0021] The advantage of this utility model is that when connected to the bottom of the oil pipe, it can prevent the oil pipe from creeping due to factors such as pressure fluctuations, load changes, and temperature changes. When the casing support is lowered, the locking block is fixed in a contracted state by a soluble pin (i.e., a soluble pin). 24 hours after being lowered into the well, the soluble pin melts, and under the action of the spring 5, the locking block protrudes outward. Under the action of the spring force, it expands outward and closely adheres to the casing. During the sliding process of the casing, it encounters the casing coupling and achieves anchoring.

[0022] The application of the casing supporter of the utility model can prevent the damaging effect of oil pipe creep on production during oil and water well production, and the casing supporter can be easily unsealed without the occurrence of well sticking accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The cross-sectional view shows the overall structure of the casing support of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the support shaft of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the centralizing sleeve of the present utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the external structure of the locking block of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the internal structure of the locking block of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the slip ring of the present invention.

[0029] Description of Figure Numbers:

[0030] 1. Support shaft; 2. Centralizing sleeve; 3. Locking block; 4. Slip ring; 5. Spring; 6. Fastening sleeve;

[0031] 12. Thread; 14. Positioning step; 20. Opening; 22. Pin hole; 24. Shoulder lift; 30. Lock tongue; 32. Step; 34. Blind hole; 40. Mounting hole; 42. Positioning step. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.

[0033] like Figure 1 As shown, the casing supporter of the embodiment of the utility model includes:

[0034] Support shaft 1, centralizing sleeve 2, locking block 3, slip ring 4, spring 5 and fastening sleeve 6;

[0035] The support shaft 1 is a cylindrical structure;

[0036] The centralizing sleeve 2 is sleeved outside the support shaft 1 and is located below the support shaft 1. The centralizing sleeve 2 is provided with an opening 20 and a pin hole 22 for the soluble pin to pass through;

[0037] The locking block 3 is arranged between the support shaft 1 and the straightening sleeve 2 by means of a soluble pin, and the locking block 3 is provided with a locking tongue 30 for entering and exiting the opening 20;

[0038] The slip ring 4 is sleeved on the outside of the support shaft 1 and pressed against the inner wall of the locking block 3 through the spring 5;

[0039] The fastening sleeve 6 is arranged below the straightening sleeve 2 and sleeved outside the straightening sleeve 2 .

[0040] like Figure 2 As shown, the support shaft 1 has a regular inner circle and a stepped cylindrical outer circle. The upper end of the inner circle has a thread 12 for connecting to an oil pipe or other connectors. The lower end of the outer circle of the support shaft 1 has a thread and a matching structure (i.e., a positioning step 14) in the middle, which can be positioned and docked with the slip ring 4 or the lock block 3. The outer conical surface is end-milled to match the other end.

[0041] like Figure 3 As shown, the centralizing sleeve 2 is a cylindrical structure with an inner shoulder 24 for positioning and matching. The minor diameter is at the upper end, and the middle part has square through holes evenly distributed around the circumference, i.e., openings 20. The upper end of each square hole corresponds to a circular through hole (pin hole 22). The inner minor diameter is milled into a hexagonal shape. The centralizing sleeve 2 is sleeved with the support shaft 1 and limits the circumferential position of the locking block 3 (for example, by means of a shoulder), and also provides radial expansion and contraction space for the locking block 3.

[0042] like Figure 4 and Figure 5As shown, the locking block 3 is an irregularly shaped geometric body, and the outer arc has multiple steps 32 to achieve positioning in the circumferential and axial directions to prevent random sliding; the upper end surface of the largest outer arc is conical, i.e., forming a truncated cone-shaped locking tongue 30. After the soluble pin (i.e., soluble pin) dissolves, the inner wall of the locking block 3 is subjected to the radial pressure of the spring 5 and moves outward through the opening 20, so that the locking tongue 30 extends radially outward, which can achieve locking or positioning on the casing, for example, embedding in the casing coupling; the largest arc inside the locking block 3 has longitudinally arranged circular holes, i.e., blind holes 34, for accommodating the spring 5 and cooperating with the circular hole of the slip ring 4 for accommodating the spring 5;

[0043] Slip Ring 4 Figure 6 As shown, it is a cylindrical structure, which is sleeved outside the support shaft 1. The outer circle has multiple mounting holes 40 (for example, blind holes) arranged longitudinally and evenly distributed around the circumference for placing the spring 5. The inner circle has a counterpart structure (positioning step 42) to achieve circumferential positioning and fastening with the support shaft 1, thereby achieving quick sleeve connection.

[0044] The fastening sleeve 6 is a short cylindrical structure with a stepped inner and outer circle. There is an internal thread in the middle of the inner circle that is threadedly connected to the support shaft 1. The inner circle has a large diameter at the upper end and threaded through holes evenly distributed around the circumference, and the outer circle has a small diameter at the lower end and an external thread.

[0045] Furthermore, the centralizing sleeve 2 is a second cylindrical structure, and the opening 20 is provided in the middle portion of the side wall of the centralizing sleeve 2. In this way, the locking force can be stabilized.

[0046] Furthermore, there are multiple openings 20, which can achieve locking in multiple directions.

[0047] Furthermore, the number of the openings 20 is three, and they are spaced apart along the circumference of the centralizing sleeve 2, for example, evenly spaced apart, so as to achieve locking at three circumferential points in a plane and stable force.

[0048] Furthermore, the opening 20 is in a rectangular shape, and the length direction of the rectangle is the axial direction of the centralizing sleeve 2, so that there can be sufficient telescopic space and locking distance.

[0049] Furthermore, the locking block 3 includes an upper locking block, an intermediate locking block and a lower locking block that are connected to each other, and the inner wall of the locking block 3 can be a stepped arc shape, wherein the inner wall of the upper locking block and the inner wall of the lower locking block are respectively fitted with the outer wall of the support shaft 1, and the inner wall of the intermediate locking block is fitted with the outer wall of the slip ring 4.

[0050] Furthermore, if Figure 1 and Figure 4 The soluble pin is pressed against the outer wall of the upper end locking block, and there is a space between the straightening sleeve 2 and the locking block 3 for the soluble pin to fully dissolve and corrode.

[0051] Furthermore, if Figure 1 and Figure 4 The lock tongue 30 is in the shape of a truncated cone, and the outer surface is a conical surface, which is convenient for achieving radial synchronous locking. During the locking or unlocking process, there is a slope for transition and buffering. The bottom or bottom surface of the lock tongue 30 is a platform perpendicular to the axis to achieve axial locking.

[0052] Furthermore, screw holes are provided on the fastening sleeve 6, and the bottom of the straightening sleeve 2 is surrounded between the support shaft 1 and the fastening sleeve 6 by screws, so that fastening is convenient and quick.

[0053] Furthermore, the fastening sleeve 6 is connected to the outside of the support shaft 1 through a threaded connection, and the connection is quick.

[0054] The tubing string connected by this utility model has a self-supporting function. When lowered, the locking block is fixed in a contracted state by a soluble pin, allowing the tubing string to move freely up and down. 24 hours after the tubing string is lowered into the well, the soluble pin melts, and under the action of the spring 5, the locking block protrudes outward, adjusts the length of the tubing string downward, and then embeds into the casing coupling, thus achieving the function of anchoring the oil pipe downward.

[0055] Directions:

[0056] 1. The casing locator should be designed to be located at the bottom of the pipe string. Use tubing to lower the pipe string equipped with the casing locator into the well to the predetermined depth and close to the casing coupling. Record the hanging weight and mark the depth on the tubing.

[0057] 2. After lowering the tubing string, leave it alone for at least 24 hours.

[0058] 3. Move the tubing up and down, observe the changes in the hanging weight, and confirm whether the locator is positioned on the casing coupling.

[0059] 4. Adjust the length of the tubing string and install the tubing hanger.

[0060] The casing locator of the utility model is mainly used for downward anchoring in oil tubing wells and can be used in conjunction with expansion packers, compression packers, bridge plugs, etc. to prevent the tubing from drastic expansion and contraction during sealing.

[0061] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. The various components of the present invention may be combined with each other without conflict, and any equivalent changes and modifications made by a person skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A casing support, characterized in that: The casing support comprises: Support shaft (1), stabilizing sleeve (2), locking block (3), slip ring (4), spring (5) and fastening sleeve (6); The support shaft (1) is a first cylindrical structure; A straightening sleeve (2) is sleeved outside the support shaft (1) and is located below the support shaft (1). The straightening sleeve (2) is provided with an opening (20) and a pin hole (22) for a soluble pin to pass through. A locking block (3) is arranged between the support shaft (1) and the straightening sleeve (2) via a soluble pin, and a locking tongue (30) is provided on the locking block (3) for entering and exiting the opening (20); A slip ring (4) is sleeved on the outside of the support shaft (1) and pressed against the inner wall of the locking block (3) through a spring (5); The fastening sleeve (6) is arranged below the straightening sleeve (2) and sleeved outside the straightening sleeve (2).

2. The casing support according to claim 1, wherein: The centralizing sleeve (2) is a second cylindrical structure, and the opening (20) is arranged in the middle portion of the side wall of the centralizing sleeve (2).

3. The casing support according to claim 1, wherein: There are multiple openings (20).

4. The casing support according to claim 1, wherein: The number of the openings (20) is 3, and they are arranged at intervals along the circumference of the centralizing sleeve (2).

5. The casing support according to claim 1, wherein: The opening (20) is rectangular.

6. The casing support according to claim 1, wherein: The locking block (3) comprises an upper locking block, an intermediate locking block and a lower locking block which are connected to each other. The inner wall of the upper locking block and the inner wall of the lower locking block are respectively fitted with the outer wall of the support shaft (1), and the inner wall of the intermediate locking block is fitted with the outer wall of the slip ring (4).

7. The casing support according to claim 1, wherein: The soluble pin is pressed tightly against the outer wall of the upper end locking block.

8. The casing support according to claim 1, wherein: The locking tongue (30) is in the shape of a truncated cone.

9. The casing support according to claim 1, wherein: The fastening sleeve (6) is provided with a screw hole, and the bottom of the straightening sleeve (2) is surrounded between the support shaft (1) and the fastening sleeve (6) by screws.

10. The casing support according to claim 1, wherein: The fastening sleeve (6) is sleeved on the outside of the support shaft (1) via a threaded connection.

Images