CN211900548U

CN211900548U - Oil well casing pipe plug anti-theft device

Info

Publication number: CN211900548U
Application number: CN202020339046.7U
Authority: CN
Inventors: 常立涛; 李元辉; 马强; 郑廷跃; 王欣; 郭丽芹; 郭丽华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-11-10
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses an oil well casing pipe plug anti-theft device uses this anti-theft device to reach the purpose that prevents that the plug from being stolen and steal, technical scheme: a through hole is transversely formed in the front end of the plug, a square hole is formed in the outer periphery of the plug, and a positioning plate is arranged on the inner wall of the plug; a shaft seat is arranged below the positioning plate and is connected with a movable arm through a shaft on the shaft seat; a spring is arranged on the front part of the movable arm, a ball rod is arranged below the front part of the movable arm, and a key is fixedly arranged above the rear part of the movable arm; a driving rod is arranged in the plug, the driving rod is provided with a hexagonal inner circle, a driven rod is arranged at the rear part of the driving rod, and an arc-shaped groove is formed in the outer periphery of the driven rod; a square groove is arranged on the inner wall of the outlet of the sleeve.

Description

Oil well casing pipe plug anti-theft device

Technical Field

The utility model relates to a sealed or packing technical field of well head specifically is a relate to an oil well casing pipe plug anti-theft device.

Background

The outlet of the casing valve of the oil well is usually connected with a plug by threads, and because workers need to frequently lift the plug off, the plug is generally not provided with a protective device, so that the plug is easy to be stolen and stolen by lawless persons, and particularly, stolen accidents can easily occur in a part of field wells at shift intervals of the workers, certain equipment and yield loss can be caused, underground energy loss can be caused, and the recording of production parameters of the oil-water well can be damaged.

In order to prevent the accidents, the existing pipe plug of a part of oil wells is welded with the outlet of a casing pipe, so that although the occurrence of theft accidents is prevented, the production sequence and the production efficiency of the oil wells are seriously influenced, workers have to perform cutting operation when performing operations such as well logging, medicine adding, well repairing and the like, and the well mouth fire operation of pipeline cutting also has certain danger.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an oil well casing pipe plug anti-theft device uses this anti-theft device restriction plug to rotate, uses simultaneously by the staff and eliminates the restriction rather than supporting instrument, reaches the purpose that prevents that the plug from being stolen by the stealing and steal.

The technical scheme is as follows: an oil well casing pipe plug anti-theft device is characterized in that a through hole is transversely formed at the front end of a plug, a square hole is radially formed at the periphery of the plug, and a positioning plate is arranged on the inner wall of the plug; a shaft seat is fixedly arranged below the positioning plate, and a movable arm is movably connected with a shaft penetrating through the shaft seat; a spring is arranged on the front part of the movable arm, the spring can act on the lower surface of the positioning plate, a ball rod is arranged below the front part of the movable arm, the lower part of the ball rod is spherical, and a key is fixedly arranged above the rear part of the movable arm; the ball bar is characterized in that a rotatable driving rod is arranged in a plug, the driving rod is provided with a hexagonal inner circle, a driven rod is fixedly arranged at the rear part of the driving rod, an arc-shaped groove is formed in the outer periphery of the driven rod, and the arc-shaped groove can be matched with the ball bar; a square groove is formed in the inner wall of the outlet of the sleeve, and the square groove can be aligned with the square hole to form a space for containing the key.

Furthermore, a supporting rod is fixedly arranged on the inner wall of the plug, a guide sleeve is fixedly arranged on the upper portion of the supporting rod, and the driving rod is in clearance fit with the guide sleeve.

Furthermore, the arc-shaped grooves are a plurality of arc-shaped grooves which are arranged on the outer periphery of the driven rod along the circumferential direction.

Furthermore, the rear end of the plug is provided with internal threads, and a small plug is connected through threads.

Has the advantages that: the utility model discloses a logical can prevent effectively that the plug from being stolen and steal, has positive meaning to the safety of maintaining the well head equipment and normal production order, moreover, uses hexagonal spanner to lift the plug off fast by the staff, easy operation, convenient to use, simultaneously, this utility model still has simple structure, the advantage of easy preparation.

Drawings

FIG. 1 is a schematic elevation structure of the utility model;

FIG. 2 is a schematic plane structure of the utility model;

FIG. 3 is a schematic structural view of portion A of FIG. 2;

fig. 4 is a schematic structural view of a portion B in fig. 2.

Description of reference numerals:

1. small plug; 2. a movable arm; 3. positioning a plate; 4. a shaft seat; 5. a shaft; 6. a spring; 7. a driven lever; 701. an arc-shaped slot; 8. plugging with a thread; 801. a through hole; 802. a square hole; 9. A cannula outlet; 901. a square groove; 10. a guide sleeve; 11. a strut; 12. a driving lever; 13. a shaft; 14. a key.

Detailed Description

The embodiments of the invention will be described in detail below with reference to fig. 1 to 4, but the invention can be implemented in many different ways as defined and covered by the claims.

It should be noted that the following description of the embodiments refers to the accompanying drawings, in which like numerals refer to the same or similar elements throughout the different views, unless otherwise specified.

With reference to fig. 1 to 4, the anti-theft device for the oil well casing pipe plug provided by the present invention is characterized in that a through hole 801 is transversely formed at the front end of the pipe plug 8, the through hole 801 is used for a hexagonal wrench to pass through, a square hole 802 is radially formed at the outer periphery of the pipe plug 8, and a positioning plate 3 is arranged on the inner wall of the pipe plug 8; a shaft seat 4 is fixedly arranged below the positioning plate 3, and a movable arm 2 is movably connected with a shaft 5 which is arranged on the shaft seat 4 in a penetrating way; a spring 6 is arranged on the front part of the movable arm 2, the spring 6 can act on the lower surface of the positioning plate 3, a ball rod 13 is arranged on the lower surface of the front part of the movable arm 2, the lower part of the ball rod 13 is spherical, and a key 14 is fixedly arranged above the rear part of the movable arm 2; a rotatable driving rod 12 is arranged in a plug 8, the driving rod 12 is provided with a hexagonal inner circle, a driven rod 7 is fixedly arranged at the rear part of the driving rod 12, an arc-shaped groove 701 is arranged on the outer periphery of the driven rod 7, and the arc-shaped groove 701 can be matched with a ball rod 13; a square groove 901 is formed on the inner wall of the sleeve outlet 9, and the square groove 901 can be aligned with the square hole 802 to form a space for accommodating the key 14.

According to the structure of the above embodiment, it can be found that, since the movable arm 2 can rotate around the shaft 5, after the ball rod 13 fixedly connected with the front part of the movable arm 2 falls into the arc-shaped groove 701 of the driven rod 7, under the action of the spring 6, the key 14 fixedly connected with the rear part of the movable arm 2 can enter the space formed by the square hole 802 and the square groove 901, the rotation of the plug 8 is limited by the key 14, the plug 8 cannot be unscrewed from the casing outlet 9, and when the driven rod 7 rotates due to the rotation of the driving rod 12, so that the ball rod 13 is separated from the arc-shaped groove 701, the movable arm 2 can overcome the acting force of the spring 6, the key 14 can be separated from the space formed by the square hole 802 and the square groove 901, and at this time, the plug 8 can be unscrewed from the casing outlet 9.

With reference to fig. 1 to 4, a supporting rod 11 is fixedly arranged on the inner wall of the plug 8, a guide sleeve 10 is fixedly arranged on the upper portion of the supporting rod 11, and the driving rod 12 is in clearance fit with the guide sleeve 10.

In the above embodiment of the present invention, the guide sleeve 10 and the supporting rod 11 are preferably used to provide support and guide for the driving rod 12, and this embodiment can ensure that the driving rod 12 and the through hole 801 keep the same axial direction, so that the worker can open the plug 8 conveniently.

In order to improve the use efficiency of the present invention, with reference to fig. 1 to 4, the arc-shaped grooves 701 are a plurality of arc-shaped grooves 701 circumferentially disposed on the outer periphery of the driven rod 7.

Referring to the attached drawings 1 to 4, the rear end of the plug 8 is provided with an internal thread, and a small plug 1 is connected through the thread.

The utility model discloses an in the above-mentioned embodiment, little plug 1 can prevent that oil gas from getting into the inside of plug 8, prevents this utility model from being eroded by shaft bottom oil gas, and this embodiment can reach the purpose that prolongs this utility model's life.

The utility model discloses a plug 8 closes with sleeve pipe export 9 soon when oil well normal production, club 13 falls into the arc wall 701 of driven lever 7, the space that key 14 embedding was formed by quad slit 802 and square groove 901, when opening the operation, at first use hexagonal spanner by the staff to stretch into through-hole 801 after reach driving lever 12 and with the interior cooperation of circle of the hexagon of driving lever 12, then rotate hexagonal spanner and make driving lever 12 rotate, it rotates to drive driven lever 7 by driving lever 12, the rotation of driven lever makes the digging arm 2 rotate, thereby make key 14 break away from the space that quad slit 802 and square groove 901 formed, finally, the staff is screwed down plug 8 can, during daily production, hexagonal spanner is carried by the staff, and the illegal molecule just can't be stolen and steal plug 8 under the prerequisite of this design unclear.

The above only is the preferred embodiment of the utility model discloses, is not used for limiting the utility model discloses, to the technical personnel in this field, the utility model discloses can have multiple change and change, all according to the utility model discloses any modification, the equivalent transform etc. that technical scheme was done, the effect of its function and production does not surpass the utility model discloses a technical scheme's scope is all regarded as the utility model discloses a protection scope.

Claims

1. An oil well casing pipe plug anti-theft device is characterized in that a through hole is transversely formed at the front end of a plug, a square hole is radially formed at the periphery of the plug, and a positioning plate is arranged on the inner wall of the plug; a shaft seat is fixedly arranged below the positioning plate, and a movable arm is movably connected with a shaft penetrating through the shaft seat; a spring is arranged on the front part of the movable arm, the spring can act on the lower surface of the positioning plate, a ball rod is arranged below the front part of the movable arm, the lower part of the ball rod is spherical, and a key is fixedly arranged above the rear part of the movable arm; a rotatable driving rod is arranged in the plug, the driving rod is provided with a hexagonal inner circle, a driven rod is fixedly arranged at the rear part of the driving rod, an arc-shaped groove is formed in the outer periphery of the driven rod, and the arc-shaped groove can be matched with the ball rod; and a square groove is formed in the inner wall of the sleeve outlet, and the square groove can be aligned with the square hole to form a space for accommodating the key.

2. The anti-theft device for the oil well casing pipe plug according to claim 1, wherein a support rod is fixedly arranged on the inner wall of the pipe plug, a guide sleeve is fixedly arranged on the upper portion of the support rod, and the driving rod is in clearance fit with the guide sleeve.

3. The anti-theft device for the plug of the oil well casing pipe according to claim 1, wherein the arc-shaped grooves are a plurality of arc-shaped grooves circumferentially arranged on the outer periphery of the driven rod.

4. An anti-theft device for a casing plug of an oil well according to claim 1 or 2, wherein an internal thread is provided at the rear end of the plug to which a small plug is screwed.