Pull tab top opening device

Abstract

The utility model relates to a kind of pulling type top opening device, it includes body (1), release lever (2) and locking assembly (3), locking assembly (3) includes outer sleeve (31), locking lever (32) and compression spring (33), locking lever (32) is equipped with locking head (36) to one end towards release lever (2), compression spring (33) is sleeved on locking lever (32), one end of compression spring (33) is matched with outer sleeve (31), the other end is matched with locking head (36), release lever (2) outer wall is equipped with several clamping grooves (21), the end of locking head (36) is equipped with the clamping tooth (37) matched with clamping groove (21).It is convenient to control the switch degree of arrow check valve, and operation is more convenient.It uses rectangular tooth locking to replace traditional tight friction mode, locking release lever is more firm and reliable, compression sealing arrow is easy to open and release pressure, it is also very convenient to release sealing arrow after opening and releasing pressure, and use effect is better.

Description

Technical Field

[0001] This utility model relates to petroleum tools, specifically to a pull-out device for opening the valve core of an arrow-shaped check valve. Background Technology

[0002] The jacking device is a crucial component of the arrow-shaped check valve. Used in conjunction with the check valve in oil and gas drilling operations, it is used for emergency opening of the check valve core or forcibly opening the check valve during routine maintenance to ensure unobstructed fluid flow within the drill string. In emergency check valve installation, the jacking device can pre-open the valve core, releasing and resetting it after installation, enabling rapid and safe operation. Current jacking devices employ a clamping friction locking method, which has drawbacks, including difficulty in controlling the opening and closing degree of the arrow-shaped check valve and insufficient safety and reliability, requiring further improvement. Summary of the Invention

[0003] The purpose of this invention is to provide a pull-out opening device that facilitates control over the opening and closing of the arrow-shaped check valve and makes operation more convenient.

[0004] The technical solution of this utility model is as follows: It includes a body, a release rod, and a locking assembly. The body has an axial through hole, and the outer wall of the lower end has a threaded connection for a tube column. Several handles are radially arranged on the outer wall of the body. The locking assembly includes an outer sleeve, a locking rod, and a compression spring. The outer sleeve is mounted on the body radially above the handles. The release rod passes through the through hole of the body and passes through the release rod hole on the outer sleeve axially. The locking rod is slidably mounted on the outer sleeve axially. A handle is installed on the end of the locking rod outside the body, and a locking head that cooperates with the release rod is provided at the end facing the release rod. The compression spring is fitted on the locking rod, with one end cooperating with the outer sleeve and the other end cooperating with the locking head. Several slots are spaced apart axially along the release rod on the outer wall of the release rod at the position where it cooperates with the locking head. The end of the locking head that cooperates with the release rod has a locking tooth that cooperates with the slot.

[0005] The technical advantages of this invention are: it facilitates the control of the opening and closing degree of the arrow-shaped check valve, making operation and use more convenient. It uses rectangular tooth locking instead of the traditional clamping friction method, making the locking and release rod more robust and reliable. Opening and releasing the compressed sealing arrow is easy, and releasing the sealing arrow after opening and releasing pressure is also very convenient, resulting in better performance. Attached Figure Description

[0006] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model. Detailed Implementation

[0007] like Figure 1As shown, it includes a body 1, a release rod 2, and a locking assembly 3. The body 1 has an axial through hole 11, and a threaded connection 12 for a tube column is provided on the outer wall of its lower end. Several handles 13 are provided radially on the outer wall of the body 1. The locking assembly 3 includes an outer sleeve 31, a locking rod 32, and a compression spring 33. The outer sleeve 31 is mounted on the body 1 radially above the handles 13. The release rod 2 passes through the through hole 11 of the body 1 and passes through the release rod hole 34 on the outer sleeve 31 axially along the body 1. The locking rod 32 slides radially along the body 1. The locking rod 32 is mounted on the outer sleeve 31. A handle 35 is installed at the end of the locking rod 32 outside the main body 1. A locking head 36 that cooperates with the release rod 2 is provided at the end facing the release rod 2. A compression spring 33 is fitted on the locking rod 32. One end of the compression spring 33 cooperates with the outer sleeve 31 and the other end cooperates with the locking head 36. A number of slots 21 are provided on the outer wall of the release rod 2 at the position where it cooperates with the locking head 36. The end of the locking head 36 that cooperates with the release rod 2 is provided with a tooth 37 that cooperates with the slot 21.

[0008] Four internally threaded holes 14 are evenly spaced along the circumference on the side wall of the middle part of the main body 1, which are used to mate with the handles 13. Each handle 13 has an external thread at the end that connects to the main body 1, and each handle 13 is installed on the main body 1 by the thread. Each handle 13 is fitted with a spare cap 15 by the thread to prevent the handle 13 from becoming loose.

[0009] Anti-slip textures 16 are provided on the outer walls of each handle 13 on the outer side of the spare cap 15.

[0010] The groove 21 on the outer wall of the release rod 2 is a rectangular groove, and the locking teeth 37 on the locking head 36 are rectangular teeth with a cross-section that cooperate with the groove 21.

[0011] The upper end of the release rod 2 is provided with a hexagonal prism-shaped rod head 22 located above the body 1, and the lower end face is provided with a groove 23 located below the body 1, which cooperates with the tip of the check valve core.

[0012] The locking rod 32 has an external thread at one end where the handle 35 is mounted. The handle 35 has an internal thread hole that mates with the locking rod 32. The handle 35 is located outside the body 1 and the outer sleeve 31 and is mounted on the locking rod 32 by threads.

[0013] The locking assembly 3 also includes a plug 38, which is located on the opposite side of the locking rod 32 and is fixedly installed inside the outer sleeve 31 to support the release rod 2.

[0014] The plug 38 is inserted into the outer sleeve 31 from the outside of the main body 1. The inner wall of the outer sleeve 31 at the outer side of the plug 38 is provided with a retaining groove in the circumferential direction. A retaining spring 39 is installed in the retaining groove to limit the plug 38 outward.

[0015] The outer wall of the plug 38 near the outer side of the body 1 is provided with an outer flange 40. The inner wall of the outer sleeve 31 at the position where it mates with the plug 38 is stepped and matches the outer wall of the plug 38. The inner end face of the stepped inner wall of the outer sleeve 31 plays an inward limiting role on the plug 38.

[0016] Working principle:

[0017] First, insert the release rod 2 into the through hole 11 of the main body 1, and then lock the release rod 2 to the target opening length using the locking rod 32. The advantage of this opening device is that the opening degree of the arrow check valve can be manually controlled, and the rectangular tooth locking device is more secure and reliable than the traditional clamping friction method. Next, place the external thread end of the opening device body into the internal thread at the upper end of the arrow check valve, and make the lower end of the release rod contact the tip of the sealing arrow of the arrow check valve. Then, screw the handle 13 on the main body into the thread, and the release rod 2 can be used to compress the sealing arrow to open and release pressure on the arrow check valve.

[0018] Maintenance and upkeep:

[0019] 1. Routine inspection: After each tripping operation, inspect the appearance of the jacking device, clean the surface mud and impurities, and check for damage to the body threads.

[0020] 2. Regular lubrication: Apply special grease to the threads of the body every 10 uses or every month to ensure smooth operation.

[0021] 3. Functional testing: A functional test shall be conducted once a month. Operate the main unit to check whether the extension and retraction of the top opening rod is smooth and whether the positioning is reliable.

[0022] 4. Storage requirements: When not in use for a long period of time, the surface of the device should be cleaned, rust-preventive oil should be applied, and it should be placed in a dry and ventilated toolbox to avoid collision and corrosion.

Claims

1. A pull-out type opening device, comprising a body (1), a release rod (2), and a locking assembly (3). The body (1) has an axial through hole (11), and a pipe thread (12) is provided on the outer wall of the lower end. Several handles (13) are provided radially on the outer wall of the body (1). The locking assembly (3) includes an outer sleeve (31), a locking rod (32), and a compression spring (33). The outer sleeve (31) is installed on the body (1) radially above the handles (13). The release rod (2) passes through the through hole of the body (1). 11) The locking rod (32) passes through the release rod hole (34) on the outer sleeve (31) along the axial direction of the body (1). The locking rod (32) is slidably mounted on the outer sleeve (31) along the radial direction of the body (1). A handle (35) is installed on the end of the locking rod (32) outside the body (1), and a locking head (36) that cooperates with the release rod (2) is provided at one end facing the release rod (2). A compression spring (33) is fitted on the locking rod (32). One end of the compression spring (33) cooperates with the outer sleeve (31), and the other end cooperates with the locking head (36). The characteristic is that: The outer wall of the release rod (2) which is in contact with the locking head (36) is provided with a number of slots (21) spaced apart along the axial direction of the release rod (2), and the end of the locking head (36) that is in contact with the release rod (2) is provided with a tooth (37) that is in contact with the slot (21).

2. The pull-out type opening device as described in claim 1, characterized in that... The main body (1) has four internal threaded holes (14) evenly spaced along the circumference on the side wall at the middle position, which are used to cooperate with the handles (13). Each handle (13) has an external thread at the end that is connected to the main body (1), and each handle (13) is installed on the main body (1) by the thread.

3. The pull-out type opening device as described in claim 2, characterized in that... Each of the handles (13) is fitted with a spare cap (15) by thread to prevent the handle (13) from loosening.

4. The pull-out type opening device as described in claim 3, characterized in that... The outer walls of each handle (13) on the outside of the spare cap (15) are provided with anti-slip textures (16).

5. The pull-out type opening device as described in claim 1, characterized in that... The groove (21) on the outer wall of the release rod (2) is a rectangular groove, and the locking teeth (37) on the locking head (36) are rectangular teeth with cross-sections that cooperate with the groove (21).

6. The pull-out type opening device as described in claim 1, characterized in that... The upper end of the release rod (2) is provided with a hexagonal prism rod head (22) located above the body (1), and the lower end is provided with a groove (23) located below the body (1) and cooperating with the tip of the check valve core.

7. The pull-out type opening device as described in claim 1, characterized in that... The locking rod (32) has an external thread at one end where the handle (35) is installed. The handle (35) has an internal thread hole that matches the locking rod (32). The handle (35) is located outside the body (1) and the outer sleeve (31) and is installed on the locking rod (32) by threads.

8. The pull-out type opening device as described in claim 1, characterized in that... The locking assembly (3) also includes a plug (38), which is located on the opposite side of the locking rod (32) and is fixedly installed inside the outer sleeve (31) to support the release rod (2).

9. The pull-out type opening device as described in claim 8, characterized in that... The plug (38) is inserted into the outer sleeve (31) from the outside of the main body (1). The inner wall of the outer sleeve (31) at the outer side of the plug (38) is provided with a retaining groove in the circumferential direction. A retaining spring (39) is installed in the retaining groove to limit the plug (38) to the outside.

10. The pull-out type opening device as described in claim 8, characterized in that... The plug (38) has an outer flange (40) on the outer wall near the outer side of the body (1). The inner wall of the outer sleeve (31) at the position where it matches the plug (38) is stepped and matches the outer wall of the plug (38). The inner end of the stepped inner wall of the outer sleeve (31) faces the plug (38) and plays an inward limiting role.

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