A cable penetrating mechanism for water injection well cable pre-setting

Abstract

The utility model discloses a kind of cable penetrating mechanisms for water injection well cable preposition, belong to water injection well cable technical field, including upper joint, lower joint, center tube, side rubber cylinder, middle rubber cylinder, setting mechanism and piston, upper joint and lower joint are respectively connected the both ends of center tube, upper cone cap, slip block, cone and pressure guide pipe are equipped on center tube, upper cone cap and cone are respectively located the both sides of slip block, center tube is communicated well flushing channel, correct pressure test is carried out through the device, it can be put into use, sand particles in the formation under well flushing packer finally cannot enter well flushing channel, to eliminate the problem of well flushing channel sand plug.

Description

Technical Field

[0001] This utility model belongs to the field of water injection well cable technology, specifically a cable threading mechanism for pre-installing water injection well cables. Background Technology

[0002] In petroleum engineering, packers are a commonly used downhole tool. The structure of a packer includes a center tube, a setting piston, and a rubber sleeve. The setting piston and rubber sleeve are installed on the outside of the center tube. During setting, pressure is applied into the center tube, and the setting piston moves under the pressure, thereby compressing the rubber sleeve and increasing its diameter, thus achieving the setting of the packer.

[0003] Washable packers are an important category of packers. These packers have a washable channel inlet and outlet on their outer wall, located on the upper and lower sides of the packer's rubber sleeve, respectively. The inlet and outlet are connected internally via the washable channel. During washable operation, the washable fluid in the annulus bypasses the packer's rubber sleeve through the washable channel, thus achieving the washable purpose. The washable packer is equipped with a washable piston. Under normal conditions, the piston closes the washable channel under pressure within the central tube. During washable operation, the piston moves and opens the washable channel under pressure within the annulus (i.e., the pressure of the washable fluid).

[0004] Currently, in existing washable packers, the wash piston is located on the upper side of the packer sleeve. In wells with a large amount of sand production, problems such as sand blockage in the wash channel or the wash piston failing to open and close properly can easily occur. Utility Model Content

[0005] Technical problem to be solved by the utility model

[0006] The purpose of this invention is to solve the problems mentioned in the background.

[0007] Technical solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model discloses a cable threading mechanism for pre-installing water injection well cables, including an upper connector, a lower connector, a central pipe, a side rubber tube, a middle rubber tube, a setting mechanism, and a piston. The upper connector and the lower connector are respectively connected to the two ends of the central pipe. The central pipe is provided with an upper cone cap, a slip block, a cone, and a pressure guiding pipe. The upper cone cap and the cone are respectively located on both sides of the slip block. The central pipe is connected to the well washing channel.

[0010] Preferably, the setting mechanism includes an upper guide cone, a guide tube, a gathering ring, a straightening cylinder, a blocking ring, a release head, a setting cylinder, a setting pin, a lower cone cap, and a lower guide cone. The upper guide cone is installed on the guide tube, the gathering ring is installed on the slip block, the straightening cylinder is sleeved on the slip block, the blocking ring is located between the side rubber tube and the middle rubber tube, the release head is installed on the pressure guide tube, the setting cylinder is installed on the outside of the piston, the setting pin is installed on the setting cylinder, and the lower cone cap is sleeved on the end of the pressure guide tube near the lower connector. The lower guide cone and the upper guide cone are installed symmetrically.

[0011] Preferably, the cone is provided with a limiting pin, and the straightening cylinder is provided with a limiting groove, with the limiting pin being engaged in the limiting groove.

[0012] Preferably, the lower cone cap is equipped with an anti-reverse pin.

[0013] Preferably, the piston has a pin seat at the end near the lower connector, and a release pin is provided on the pin seat. The pin seat has a locking ring at the end away from the piston, and a locking ring cap is provided on the locking ring.

[0014] Beneficial effects

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] This utility model discloses a cable threading mechanism for pre-installing water injection well cables. After a proper pressure test, the device can be put into use. Ultimately, it can prevent sand particles in the formation below the well wash packer from entering the well wash channel, thereby eliminating the problem of sand blockage in the well wash channel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a cable threading mechanism for pre-installing cables in a water injection well, according to this utility model.

[0018] Explanation of the labels in the diagram:

[0019] 1. Upper connector; 2. Upper guide cone; 3. Guide tube; 4. Upper cone cap; 5. Center tube; 6. Gathering ring; 7. Slip block; 8. Straightening cylinder; 9. Cone; 10. Limiting pin; 11. Pressure guide tube; 12. Side rubber sleeve; 13. Barrier ring; 14. Middle rubber sleeve; 15. Release head; 16. Piston; 17. Pin seat; 18. Unlocking pin; 19. Locking ring; 20. Locking ring cap; 21. Sealing cylinder; 22. Sealing pin; 23. Lower cone cap; 24. Lower guide cone; 25. Lower connector; 26. Sealing ring; 27. Anti-reverse pin. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] See attached document Figure 1 This embodiment of a cable threading mechanism for pre-installing water injection well cables includes an upper connector 1, a lower connector 25, a central pipe 5, a side rubber sleeve 12, a middle rubber sleeve 14, a setting mechanism, and a piston 16. The upper connector 1 and the lower connector 25 are respectively connected to the two ends of the central pipe 5. The central pipe 5 is provided with an upper cone cap 4, a slip block 7, a cone 9, and a pressure guiding pipe 11. The upper cone cap 4 and the cone 9 are respectively located on both sides of the slip block 7. The central pipe 5 is connected to the well washing channel.

[0028] The setting mechanism of this embodiment includes an upper guide cone 2, a guide tube 3, a gathering ring 6, a straightening cylinder 8, a blocking ring 13, a release head 15, a setting cylinder 21, a setting pin 22, a lower cone cap 23, and a lower guide cone 24. The upper guide cone 2 is installed on the guide tube 3, the gathering ring 6 is installed on the slip block 7, the straightening cylinder 8 is fitted on the slip block 7, the blocking ring 13 is located between the side rubber tube 12 and the middle rubber tube 14, the release head 15 is installed on the pressure guide tube 11, the setting cylinder 21 is installed outside the piston 16, the setting pin 22 is installed on the setting cylinder 21, the lower cone cap 23 is fitted on the end of the pressure guide tube 11 near the lower connector 25, and the lower guide cone 24 is symmetrically installed with the upper guide cone 2.

[0029] In this embodiment, the cone 9 is provided with a limiting pin 10, and the straightening cylinder 8 is provided with a limiting groove, and the limiting pin 10 is locked in the limiting groove.

[0030] In this embodiment, the lower cone cap 23 is provided with an anti-reverse pin 27.

[0031] In this embodiment, a pin seat 17 is provided at one end of the piston 16 near the lower connector 25. A release pin 18 is provided on the pin seat 17. A locking ring 19 is provided at the other end of the pin seat 17 away from the piston 16. A locking ring cap 20 is provided on the locking ring 19.

[0032] Working principle:

[0033] 1. Before the pressure test, the steel pipe cable is considered to be qualified if it is successfully threaded through the upper joint 1 and the lower joint 2 respectively;

[0034] 2. Test the sealing pressure. Connect the device to the pressure head, and block the lower connector 25. Insert the device into the test sleeve and pressurize it to 20MPa. Liquid should come out of the central tube 5. If there is no leakage and the pressure does not drop, it is considered qualified.

[0035] 3. Test setting: Place the tubing anchor into the test casing, apply internal pressure of 8-12 MPa, shear the setting pin 22, move the cone 9 upward, and open the slip block 7. Continue to apply internal pressure to 18-20 MPa. There should be no leakage and the pressure should not drop.

[0036] 4. Test the pressure: Apply an internal pressure of 35MPa, and apply pressure of 25-30MPa at the top and bottom of the equipment respectively. Stabilize the pressure for 5 minutes. A pressure drop of less than 2MPa is acceptable.

[0037] 5. Test the release mechanism, cut off release pin 18, retract slip block 7, and the oil pipe anchor release is qualified.

[0038] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cable threading mechanism for pre-installing cables in water injection wells, characterized in that: It includes an upper connector (1), a lower connector (25), a central tube (5), a side rubber tube (12), a middle rubber tube (14), a setting mechanism, and a piston (16). The upper connector (1) and the lower connector (25) are respectively connected to the two ends of the central tube (5). The central tube (5) is provided with an upper cone cap (4), a slip block (7), a cone (9), and a pressure guide tube (11). The upper cone cap (4) and the cone (9) are respectively located on both sides of the slip block (7). The central tube (5) is connected to the well washing channel.

2. The cable threading mechanism for pre-installing water injection well cables according to claim 1, characterized in that: The setting mechanism includes an upper guide cone (2), a guide tube (3), a gathering ring (6), a straightening cylinder (8), a blocking ring (13), a release head (15), a setting cylinder (21), a setting pin (22), a lower cone cap (23), and a lower guide cone (24). The upper guide cone (2) is installed on the guide tube (3), the gathering ring (6) is installed on the slip block (7), the straightening cylinder (8) is fitted on the slip block (7), the blocking ring (13) is located between the side rubber tube (12) and the middle rubber tube (14), the release head (15) is installed on the pressure guide tube (11), the setting cylinder (21) is installed outside the piston (16), the setting pin (22) is installed on the setting cylinder (21), the lower cone cap (23) is fitted on the end of the pressure guide tube (11) near the lower connector (25), and the lower guide cone (24) is symmetrically installed with the upper guide cone (2).

3. The cable threading mechanism for pre-installing water injection well cables according to claim 2, characterized in that: The cone (9) is provided with a limiting pin (10), and the straightening cylinder (8) is provided with a limiting groove. The limiting pin (10) is locked in the limiting groove.

4. The cable threading mechanism for pre-installing water injection well cables according to claim 2, characterized in that: The lower cone cap (23) is provided with an anti-reverse pin (27).

5. The cable threading mechanism for pre-installing water injection well cables according to claim 1, characterized in that: The piston (16) has a pin seat (17) at one end near the lower connector (25), and a release pin (18) is provided on the pin seat (17). The pin seat (17) is provided with a locking ring (19) at one end away from the piston (16), and a locking ring cap (20) is provided on the locking ring (19).

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