CN2769502Y

CN2769502Y - Oil field well head antitheft device

Info

Publication number: CN2769502Y
Application number: CN 200420099270
Authority: CN
Inventors: 汤广德
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-26
Filing date: 2004-12-26
Publication date: 2006-04-05
Anticipated expiration: 2014-12-26

Abstract

The utility model relates to an oil field well opening anti-theft device. The utility model has the technical scheme that the utility model comprises a well opening cap (1) and a special spanner (2) which is composed of a handle part (3) and a work part (7), wherein the well opening cap (1) comprises a cap body (5) and a disassembling and assembling nut (2). The cap body (5) is a screw stopper with one end sealed. The outer side of the sealing end of the cap body is fixedly connected with the disassembling and assembling nut (2), wherein the utility model also comprises a protective cover (1). A tool window (4) is arranged on the side surface of the protective cover. The protective cover is fixedly connected to the cap body (5). The protective cover is arranged above the disassembling and assembling nut. The structure and the shape of the cross section of the work part of the special spanner (2) are corresponding to the structure and the shape of the cross section of the disassembling and assembling nut (2). The utility model has the advantages that the disassembling and assembling nut can not be obviously observed by people due to the protection of the protective cover, can not be measured, and can not be mapped and made by a disassembling tool, and an oil well is effectively protected.

Description

The oil field shaft mouth anti-theft device

One, technical field:

The utility model relates to the well head SLD of using in a kind of oil field, particularly a kind of oil field shaft mouth anti-theft device.

Two, background technology:

At present, Anti-theft cap shut-in well relatively simple for structure is often adopted to the well head of erection equipment not in each oil field, because this Anti-theft cap is measured easily, so demounting tool is made easily, therefore the situation that Anti-theft cap is laid down by imitated demounting tool often takes place, cause very big economic loss.

Three, summary of the invention:

The purpose of this utility model is exactly the above-mentioned defective that exists at prior art, and a kind of oil field shaft mouth anti-theft device is provided.

Technical scheme: comprise wellhead cap (1) and the special spanner of forming by shank (3) and operate portions (7) (2), described wellhead cap (1) comprises cap body (5) and dismounting nut (2), described cap body (5) is the plug that an end is shut, the cap body is shut the fixedly connected dismounting nut in the outside (2) of end, wherein: also comprise protecting cover (1), have instrument window (4) on the side of protecting cover, protecting cover is fixedly connected on the cap body (5), and protecting cover is located at the top of dismounting nut; Described special spanner (2), the structure in the cross section of its operate portions, shape are corresponding with structure, the shape in the cross section of dismounting nut (2).

The operate portions (7) of described special spanner (2) is made up of projection (10) and negative area (11), and projection (10) is corresponding with the oral area (8) of dismounting nut (2), and negative area (11) is corresponding with the tongue (9) of dismounting nut (2).

Beneficial effect is: because the protection of protecting cover is arranged, the dismounting nut can not be seen clearly by the people, more can not be measured, and demounting tool can not be surveyed and drawn making, has protected oil well effectively.

Four, description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the generalized section of A-A section among Fig. 1;

Fig. 3 is the structural representation of special spanner of the present utility model;

Fig. 4 is that B-B cuts open and shows schematic diagram among Fig. 3;

Fig. 5 is the generalized section of C-C section among Fig. 3.

Five, the specific embodiment:

With reference to accompanying drawing, the utility model will be further described in conjunction with the accompanying drawings:

The Pithead preventing thieves cap is made up of protecting cover 1, dismounting nut 2, cap body 5, have instrument window 4 on the side of protecting cover 1, dismounting nut 2 comprises oral area 8 and tongue 9, the section of oral area 8 is a regular pentagon, the section of tongue 9 is circular, cap body 5 is plugs that an end is shut, protecting cover 1 is located at the top of dismounting nut 2 and is fixedly connected on the cap body 5, dismounting nut 2 is fixedly connected on the cap body 5, in addition, also comprise guard shield 6, guard shield 6 is fixedlyed connected with protecting cover 1, guard shield be positioned at protecting cover below, and cover on the outside of dismounting nut 2 and cap body 5;

The utility model special spanner is made up of shank 3 and operate portions 7, and described operate portions 7 is made up of projection 10 and recessed portion 11, and projection 10 is corresponding with the oral area 8 of wiping nut 2, and recessed portion 11 is corresponding with the tongue 9 of dismounting nut 2.

During mounting or dismounting Pithead preventing thieves cap, special spanner is stretched in the protecting cover 1 by instrument window 4, after the operate portions 7 and the dismounting nut 2 of special spanner assembled, drive the work that the rotation of Pithead preventing thieves cap has just been finished dress, torn the Pithead preventing thieves cap open.

Claims

1, a kind of oil field shaft mouth anti-theft device, comprise wellhead cap (1) and the special spanner of forming by shank (3) and operate portions (7) (2), described wellhead cap (1) comprises cap body (5) and dismounting nut (2), described cap body (5) is the plug that an end is shut, the cap body is shut the fixedly connected dismounting nut in the outside (2) of end, it is characterized in that: also comprise protecting cover (1), have instrument window (4) on the side of protecting cover, protecting cover is fixedly connected on the cap body (5), and protecting cover is located at the top of dismounting nut; Described special spanner (2), the structure in the cross section of its operate portions, shape are corresponding with structure, the shape in the cross section of dismounting nut (2).

2, oil field shaft mouth anti-theft device according to claim 1, it is characterized in that: the operate portions (7) of described special spanner (2) is made up of projection (10) and negative area (11), projection (10) is corresponding with the oral area (8) of dismounting nut (2), and negative area (11) is corresponding with the tongue (9) of dismounting nut (2).