Portable anti-theft plug

Abstract

This invention discloses a convenient anti-theft plug, relating to the technical field of oilfield extraction. It includes a hollow cylinder for installation within a valve channel. Multiple toothed blocks are evenly distributed along the sidewall of the cylinder. An internal expansion pin is threadedly connected to the end of the cylinder furthest from the valve channel. A connector is located at the front end of the internal expansion pin, its sidewall abutting against the bottom of the toothed blocks, and the connector can push the toothed blocks radially outward along the cylinder. A stepped hole is formed at the rear end of the internal expansion pin, including an internal hexagonal anti-theft hole and a threaded hole arranged from the inside out. The internal hexagonal anti-theft hole can engage with an anti-theft wrench. A sealing ring is fitted onto the outer wall of the cylinder. This invention allows for quick installation during temporary shutdowns, preventing crude oil leakage even when the valve is opened, thus providing anti-theft protection.

Description

Technical Field

[0001] This invention relates to the technical field of oilfield development, and in particular to a convenient anti-theft plug. Background Technology

[0002] During long-term oilfield production, when some high-yield oil wells shut down due to malfunctions or pump problems, oil theft and leakage from the casing of the pumping unit wells are common occurrences. This is because the casing mostly contains pure oil without water, and the submersion is approximately 0.86 tons per 100 meters. Simply opening the wellhead casing vent valve allows crude oil to be released to the surface, causing not only oil loss but also large-scale oil spills, environmental pollution incidents, increased difficulties in production management, and increased workload for on-site staff. Summary of the Invention

[0003] The purpose of this invention is to provide a convenient anti-theft plug to solve the problems existing in the prior art. It can be quickly installed in case of temporary shutdown, and even if the valve is opened, crude oil cannot flow out, thus playing an anti-theft role.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a convenient anti-theft plug, comprising a hollow column for installation within a valve channel. Multiple toothed blocks are evenly distributed along the sidewall of the column. An internal expansion pin is threadedly connected to the end of the column furthest from the valve channel. A connector is located at the front end of the internal expansion pin, and its sidewall abuts against the bottom of the toothed blocks. The connector can also push the toothed blocks radially outward along the column. A stepped hole is formed at the rear end of the internal expansion pin, comprising an internal hexagonal anti-theft hole and a threaded hole arranged from the inside out. The internal hexagonal anti-theft hole can engage with an anti-theft wrench. A sealing ring is fitted onto the outer wall of the column.

[0006] Optionally, it also includes a delivery sleeve, on which a fixing rod is fixedly installed. Two T-shaped flanges are symmetrically provided at one end of the delivery sleeve. The virtual circle containing the radial cross-section of the flanges is concentrically and equal in diameter to the radial cross-section of the delivery sleeve. Two symmetrically arranged arc-shaped grooves are opened on the outer wall of the end of the column away from the valve channel. A connecting notch is opened at the end of the arc-shaped groove away from the valve channel. The flange can pass through the connecting notch and rotate in the arc-shaped groove.

[0007] Optionally, the anti-theft wrench includes a first wrench and a second wrench that are vertically fixedly connected. The first wrench has a cylindrical structure, and the second wrench has a hexagonal cross-section. Two positioning posts are fixedly connected to the end of the second wrench. The second wrench can be engaged in the internal hexagonal anti-theft hole.

[0008] Optionally, the threaded hole is fixedly connected with an anti-theft plug, and the end of the anti-theft plug away from the inner expansion pin shaft has two positioning holes, and the two positioning pins can be inserted into the two positioning holes respectively.

[0009] Optionally, the front end of the connector is a frustum-shaped structure with a gradually decreasing diameter, the bottom of the tooth block is a sloping structure, and the sloping direction of the bottom of the tooth block is the same as the sloping direction of the side wall of the front end of the connector.

[0010] Optionally, a return platform is provided on both sides of the top of the tooth block, and a return rubber ring is sleeved on the outside of the return platform.

[0011] Optionally, a return rubber ring groove is provided on the side wall of the column, the return rubber ring is sleeved in the return rubber ring groove, and the return platform of the tooth block abuts against the inner side of the return rubber ring.

[0012] Optionally, an annular sealing groove is provided between the tooth block and the arc-shaped groove, and the sealing ring is fitted inside the sealing groove.

[0013] The present invention achieves the following technical effects compared to the prior art:

[0014] This invention effectively solves the problem of preventing oil theft in casing draining of remote wells that are shut down for extended periods, wells with various pump conditions, and intermittent pumping wells during temporary shutdowns. It achieves the goals of quick and safe installation, environmental protection, and creates significant economic and social benefits. By installing the device in the valve channel and using an anti-theft wrench structure, the problem of easily opening conventional wrenches is avoided, effectively preventing oil theft and reducing the workload of employees in cleaning up waste oil. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic cross-sectional view of the convenient anti-theft plug of the present invention;

[0017] Figure 2 This is a schematic diagram of the delivery sleeve structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the anti-theft wrench structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the column structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal expansion pin shaft structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the tooth block structure of the present invention;

[0022] Figure 7 This is a schematic diagram of the anti-theft plug structure of the present invention;

[0023] Explanation of reference numerals in the attached drawings: 1-Column, 101-Arc groove, 102-Connecting notch, 2-Tooth block, 201-Returning platform, 3-Inner expansion pin shaft, 301-Connecting head, 4-Anti-theft wrench, 401-First wrench, 402-Second wrench, 403-Positioning pin, 5-Anti-theft plug, 501-Positioning hole, 6-Sealing ring, 7-Feeding sleeve, 701-Flange, 8-Fixing rod, 9-Returning rubber ring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The purpose of this invention is to provide a convenient anti-theft plug to solve the problems existing in the prior art. It can be quickly installed in case of temporary shutdown, and even if the valve is opened, crude oil cannot flow out, thus playing an anti-theft role.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This invention provides a convenient anti-theft plug, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the device includes a hollow column 1 for installation within a valve passage. Multiple toothed blocks 2 are evenly spaced along the sidewall of column 1. An internal expansion pin 3 is threaded to the end of column 1 furthest from the valve passage. A connector 301 is located at the front end of the internal expansion pin 3. The front end of the connector 301 is a frustum-shaped structure with a gradually decreasing diameter. The bottom of the toothed blocks 2 is a sloping structure, with the sloping direction of the bottom of the toothed blocks 2 being the same as the sloping direction of the front sidewall of the connector 301. The sidewall of the connector 301 can abut against the bottom of the toothed blocks 2, and the connector 301 can push the toothed blocks 2 radially outward along column 1. A stepped hole is opened at the rear end of the internal expansion pin 3. The hole includes an internal hexagonal anti-theft hole and a threaded hole arranged from the inside out. The anti-theft wrench 4 includes a first wrench 401 and a second wrench 402 that are vertically fixedly connected. The first wrench 401 has a cylindrical structure, and the second wrench 402 has a hexagonal cross-section. Two positioning pins 403 are fixedly connected to the end of the second wrench 402. The second wrench 402 can be engaged in the internal hexagonal anti-theft hole. An anti-theft plug 5 is fixedly connected to the threaded hole. Two positioning holes 501 are opened at the end of the anti-theft plug 5 away from the internal expansion pin shaft 3. The two positioning pins 403 can be inserted into the two positioning holes 501 respectively. A sealing ring 6 is sleeved on the outer wall of the column 1.

[0028] A further preferred embodiment includes a delivery sleeve 7, on which a fixing rod 8 is fixedly installed. Two T-shaped flanges 701 are symmetrically provided at one end of the delivery sleeve 7. The virtual circle containing the radial cross-section of the flanges 701 is concentrically arranged with the same diameter as the radial cross-section of the delivery sleeve 7. Two symmetrically arranged arc-shaped grooves 101 are opened on the outer wall of the column 1 at the end away from the valve channel. A connecting notch 102 is opened at the end of the arc-shaped groove 101 away from the valve channel. The flanges 701 can pass through the connecting notch 102 and rotate within the arc-shaped groove 101.

[0029] The toothed block 2 has return platforms 201 on both sides of its top, and a return rubber ring 9 is fitted on the outer side of the return platform 201. A return rubber ring groove is formed on the side wall of the column 1, and the return rubber ring 9 is fitted into the return rubber ring groove. The return platform 201 of the toothed block 2 abuts against the inner side of the return rubber ring 9. Thus, when the anti-theft wrench 4 is turned in the reverse direction and the inner expansion pin 3 is removed, the toothed block 2 can automatically retract and return to its original position under the elastic force of the return rubber ring 9, which facilitates the quick removal of the column 1. An annular sealing ring groove is formed between the toothed block 2 and the arc groove 101. The sealing ring 6 is fitted into the sealing ring groove. The sealing ring 6 provides a sealing effect and can prevent crude oil from flowing out of the valve passage.

[0030] When using this invention, first push the assembled anti-theft plug assembly into the valve channel until it stops at the valve port ring. Tighten the inner expansion pin shaft 3 with the anti-theft wrench 4. During the tightening process, the flange 701 of the delivery sleeve 7 rotates within the arc groove 101. When it rotates to the edge of the arc groove 101, the flange 701 is limited. At this point, the delivery sleeve 7 and the column 1 cannot continue to rotate relative to each other. After fixing the fixing rod 8, the column 1 will also be fixed and cannot rotate within the valve channel. Then, insert the anti-theft wrench 4 into the internal hexagonal anti-theft hole and rotate the anti-theft wrench 4 so that the inner expansion pin shaft 3 advances along the thread within the column 1. The inclined surface of its connector 301 abuts against the inclined surface of the bottom of the toothed block 2 and pushes the toothed block. 2. Move the cylinder 1 radially outward to make the toothed block 2 tightly expand onto the inner control ring surface. Then, insert the anti-theft plug 5 into the threaded hole of the inner expansion pin 3. Use the positioning pin 403 of the anti-theft wrench 4 to connect with the positioning hole 501. Tighten the anti-theft wrench 4 to make the anti-theft plug 5 threadedly and fixedly connected to the threaded hole. Finally, rotate the delivery sleeve 7 in the opposite direction and remove the delivery sleeve 7 through the connection notch 102. At this time, even if the valve is opened, crude oil cannot flow out, which plays an anti-theft role. The positioning hole 501 of the anti-theft plug 5 and the internal hexagonal anti-theft hole structure inside the inner expansion pin 3 play a double anti-theft role, making it impossible for a traditional wrench to turn and remove the main body of the device of this invention. The anti-theft effect is good.

[0031] In the description of this invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A convenient anti-theft plug, characterized in that: The device includes a hollow column for installation within a valve channel. Multiple toothed blocks are evenly distributed along the column's sidewalls. An internal expansion pin is threaded to the end of the column furthest from the valve channel. A connector is located at the front end of the internal expansion pin, its sidewall abutting against the bottom of the toothed block, and the connector can push the toothed block radially outward along the column. A stepped hole is located at the rear end of the internal expansion pin, including an internal hexagonal anti-theft hole and a threaded hole arranged from the inside out. The internal hexagonal anti-theft hole can engage with an anti-theft wrench. A sealing ring is fitted onto the outer wall of the column. It also includes a delivery sleeve, on which a fixing rod is fixedly installed. Two T-shaped flanges are symmetrically provided at one end of the delivery sleeve. The virtual circle containing the radial cross-section of the flanges is concentric with the radial cross-section of the delivery sleeve. Two symmetrically arranged arc-shaped grooves are opened on the outer wall of the column at the end away from the valve channel. A connecting notch is opened at the end of the arc-shaped groove away from the valve channel. The flange can pass through the connecting notch and rotate in the arc-shaped groove.

2. The portable anti-theft plug according to claim 1, characterized in that: The anti-theft wrench includes a first wrench and a second wrench that are vertically fixedly connected. The first wrench has a cylindrical structure, and the second wrench has a hexagonal cross-section. Two positioning pins are fixedly connected to the end of the second wrench. The second wrench can be engaged in the internal hexagonal anti-theft hole.

3. The portable anti-theft plug according to claim 2, characterized in that: An anti-theft plug is fixedly connected to the internal thread of the threaded hole. Two positioning holes are opened at the end of the anti-theft plug away from the internal expansion pin shaft, and the two positioning pins can be inserted into the two positioning holes respectively.

4. The portable anti-theft plug according to claim 1, characterized in that: The front end of the connector is a frustum-shaped structure with a gradually decreasing diameter, and the bottom of the tooth block is a sloping structure. The sloping direction of the bottom of the tooth block is the same as the sloping direction of the side wall of the front end of the connector.

5. The portable anti-theft plug according to claim 1, characterized in that: The tooth block has return platforms on both sides of its top, and a return rubber ring is fitted on the outside of the return platform.

6. The portable anti-theft plug according to claim 5, characterized in that: A return rubber ring groove is provided on the side wall of the column, the return rubber ring is sleeved in the return rubber ring groove, and the return platform of the tooth block abuts against the inner side of the return rubber ring.

7. The portable anti-theft plug according to claim 1, characterized in that: An annular sealing groove is provided between the tooth block and the arc-shaped groove, and the sealing ring is fitted inside the sealing groove.

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