CN201007193Y

CN201007193Y - Casing tube anti-theft well mouth cap

Info

Publication number: CN201007193Y
Application number: CNU2006201665319U
Authority: CN
Inventors: 金泳福; 高伟; 刘建群; 钱福和
Original assignee: Daqing Petroleum Administration Bureau
Current assignee: Daqing Petroleum Administration Bureau
Priority date: 2006-12-05
Filing date: 2006-12-05
Publication date: 2008-01-16
Anticipated expiration: 2016-12-05

Abstract

The utility model relates to a sleeve theftproof well mouth cap, which mainly solves the problem that the present screw thread connecting sleeve theftproof device has poor theftproof capability, characterized in that the lower end of a protective thread (1) is covered with a protective cap (2); the upper end of the protective cap (2) is connected with an inner sleeve (3); the upper part of the inner sleeve (3) is separately fixed with an upper and a lower cover boards (4, 5); the upper cover board (4) is fixed with a locking cap (6) which has a bottom; a locking pin (7) is arranged under a spring inside the locking cap (6); the upper part of a boss of the locking pin (7) is provided with a cuboid matched with a square hole inside the locking cap (6); the locking pin (7) is connected with a rotating disk (8); the rotating disk (8) is connected with two lock pins (9); the lock pin (9) is extended out of the inner sleeve (3) through a strip hole on the inner sleeve (3); and the protective cap (2) is vertically equipped with a hole (10) corresponding to the lower end of the rotating disk (8). The sleeve theftproof well mouth cap has the characteristics of good theftproof function and simple structure.

Description

Sleeve pipe Pithead preventing thieves cap

Technical field:

The utility model relates to the used protective device of completion, especially sleeve pipe Pithead preventing thieves cap in the oil drilling field.

Background technology:

The casing protection device is to be used for after drilling well is finished but the equipment that the sleeve pipe that bassets is not carried out the well head sealing before the production tree is installed as yet.Existing wellhead assembly is owing to only adopt the mode that is threaded, anti-theft feature is poor, and at present when carrying out the development of oil field new block, the real production time of drilling well and oil well is often longer again at interval, make well head after the drilling well often by artificial destruction, cause well head to stop up, the serious overhaul that needs is handled, cause the difficulty of going into operation, and increased disposal cost.

The utility model content:

In order to solve the problem of existing screw joint casing anti-theft device anti-theft feature difference, the utility model provides a kind of sleeve pipe Pithead preventing thieves cap, and this sleeve pipe Pithead preventing thieves cap has anti-theft feature and reaches characteristic of simple structure well.

The technical solution of the utility model is: this sleeve pipe Pithead preventing thieves cap comprises thread protector with holes at the end, the thread protector lower end is covered with hard hat, the hard hat upper end is connected with interior cover, interior cover top is fixed with upper and lower cover plate respectively, be fixed with the band locking cap at the end on the upper cover plate, be equipped with stop pin under the locking cap inner spring, stop pin boss top have with locking cap in the cuboid that matches of square hole, be connected with rotating disk on the stop pin, be connected with two lock pins on the rotating disk, in stretching out, the strip hole that lockpin ventilating puts in excessively outside the cover, the hole corresponding with the rotating disk lower end arranged vertically on the hard hat.

Lockpin ventilating in the such scheme is crossed pin and is connected on the rotating disk.

The utlity model has following beneficial effect: this sleeve pipe Pithead preventing thieves cap is owing to take such scheme; thread protector covers mutually by hard hat; hard hat puts two lock pins lockings by interior again, can't open under the special tool situation not having, thereby prevent that effectively well head is by artificial destruction; protected the serviceability rate of well head; guarantee the normal operation of oil well, reduced well head operation cost, shortened the cycle of bringing in; and simple in structure, help applying.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model.

1-thread protector among the figure, cover in the 2-hard hat, 3-, 4-upper cover plate, 5-lower cover, 6-locking cap, 7-stop pin, 8-rotating disk, 9-lock pin, 10-hole.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this sleeve pipe Pithead preventing thieves cap comprises thread protector with holes 1 at the end, thread protector 1 lower end is covered with hard hat 2, cover 3 in hard hat 2 upper ends are connected with, on interior cover 3 tops are intrinsic respectively, lower cover (4,5), be fixed with the band locking cap 6 at the end on the upper cover plate 4, be equipped with stop pin 7 under locking cap 6 inner springs, the cuboid that matches with locking cap 6 interior square holes is arranged at stop pin 7 boss tops, is connected with rotating disk 8 on the stop pin 7, is connected with two lock pins 9 on the rotating disk 8, in stretching out by the strip hole on the interior cover 3, lock pin 9 outside the cover 3, the hole 10 corresponding with rotating disk 8 lower ends arranged vertically on the hard hat 2.

During actual the use, at first with thread protector 1 by being threaded in the casing joint, after then hard hat 2 being connected, rotating rotating disk 8 drive lock pins 9 by special tool more inwardly shrinks, after lock pin 9 shrinks, place in the interior cover 3 and locking, it is protruding to drive lock pins 9 by special tool rotation rotating disk 8 at last, and with hard hat 2 lockings.Because of thread protector 1 is connected in the casing joint; on have hard hat 2 to cover mutually; when not having special tool; the saboteur can only rotate hard hat 2; hard hat 2 can freely rotate, but hard hat 2 can not move up and down, so the saboteur can't destroy well head; have only the professional just can open hard hat 2, reach the purpose of protection well head with special tool.Thereby prevent that effectively well head from by artificial destruction, having protected the serviceability rate of well head, guarantee the normal operation of oil well; reduce well head operation cost, shortened the cycle of bringing in, and simple in structure; help applying, to intra-field bailing well, this device has more practical value.

Claims

1. sleeve pipe Pithead preventing thieves cap, comprise thread protector with holes (1) at the end, it is characterized in that: thread protector (1) lower end is covered with hard hat (2), hard hat (2) upper end is connected with interior cover (3), interior cover (3) top is fixed with respectively, lower cover (4,5), be fixed with the band locking cap (6) at the end on the upper cover plate (4), be equipped with stop pin (7) under locking cap (6) inner spring, the cuboid that matches with the interior square hole of locking cap (6) is arranged at stop pin (7) boss top, be connected with rotating disk (8) on the stop pin (7), be connected with two lock pins (9) on the rotating disk (8), lock pin (9) stretches out outside the interior cover (3) by the strip hole on the interior cover (3), and the hole (10) corresponding with rotating disk (8) lower end vertically arranged on the hard hat (2).

2. sleeve pipe Pithead preventing thieves cap according to claim 1 is characterized in that: lock pin (9) is connected on the rotating disk (8) by pin.