CN201650177U

CN201650177U - Shaft wall coring gun

Info

Publication number: CN201650177U
Application number: CN2010200153057U
Authority: CN
Inventors: 王连生
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-13
Filing date: 2010-01-13
Publication date: 2010-11-24
Anticipated expiration: 2020-01-13

Abstract

The utility model provides a shaft wall coring gun, which belongs to a petroleum exploration and development apparatus, and comprises a coring gun body with a cabling channel, a rock core barrel seat is mounted in a magazine case of the coring gun body, a bleed screw is mounted on the rock core barrel seat, a rock core barrel is mounted at the outside of the rock core barrel seat, an ignition screw is mounted on the coring gun body outside the magazine case, a sealing ring is arranged between the ignition screw and the coring gun body, a wire rope groove is also arranged on the coring gun body, the sealing ring consists of two relative cone-shaped sealing ring bodies, and relative faces of the two sealing ring bodies are minor-diameter end faces. The pressurization performance of the coring gun is improved, the coring gun can perform coring operation successfully in deeper wells, thereby extending the range of use, and reducing the possibility of leakage. The cover plate welding means can also be changed to a screw connecting structure, so as to reduce the processing difficulty, facilitate the maintenance, and reduce the using cost of users.

Description

The side-wall coring rifle

Technical field

The utility model provides a kind of oil exploration exploitation utensil, especially a kind of improved side-wall coring rifle.

Background technology

In the oil exploration recovery process, after drilling well is finished, need get core to the borehole wall and just take a sample.Get in the core process, because downhole temperature and pressure are very high to the insulating properties and the seal and pressure bearing requirement of getting the core rifle all than higher, otherwise it is unsuccessful or press problem such as leakages igniting often to occur, and safety problem also can not get guarantee.And existing side-wall coring rifle adopts folk prescription to sealing mat, and the pressure that can bear is low, and generally all less than 100MPa, the seal and pressure bearing effect is relatively poor.And the cover plate outside the trough adopts the form of welding and gets core rifle body and is fixed together, and both has been difficult to make, and the user can not oneself keep in repair, and can only return manufacturer's maintenance, has increased use cost.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of side-wall coring rifle, to improve its pressure bearing and seal effect.

The utility model is to realize like this, the side-wall coring rifle, it have take away wire casing get core rifle body, get in the magazine of core rifle body the core cylinder base is installed, on the core cylinder base bleed screw is installed, core cylinder base outside is equipped with the core tube, getting on the core rifle body of described magazine outside the igniting screw is installed, igniting screw and get between the core rifle body sealing ring is arranged, also has steel wire rope groove getting on the core rifle body, described sealing ring is made of the sealing circle body of two relative tapers, and the opposite face of two sealing circle bodies is the minor diameter end face.

That adopts said structure gets the core rifle, has improved the withstand voltage properties of getting the core rifle, makes it successfully get core in darker well, has enlarged the scope of application, has reduced and has pressed the occurrence probability that leaks.Also can make the cover plate welding manner into the screw syndeton, reduce difficulty of processing, make things convenient for maintenance, reduce user's use cost.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model.

As shown in drawings, the side-wall coring rifle of the utility model, it have take away wire casing 3 get core rifle body 12, get in the magazine 7 of core rifle body core cylinder base 8 is installed, bleed screw 9 is installed on the core cylinder base, core cylinder base outside is equipped with core tube 10, getting of described magazine 7 outsides igniting screw 6 is installed on the core rifle body, igniting screw and get between the core rifle body sealing ring 5 is arranged, also has steel wire rope groove 11 getting on the core rifle body, described sealing ring 5 is made of the sealing circle body of two relative tapers, and the opposite face of two sealing circle bodies is a smaller diameter end.

Because the sealing circle body of two tapers is adopted in sealing, inside and outside both direction can bear pressure, and owing to have tapering, the pressure that bears high sealability effect more is good more.Prove that through pressure test the sealing ring in the utility model can not revealed at the pressure of 140MPa.Obviously, get the corresponding groove of sealing ring shape that has on the core rifle body with two tapers, to realize the installation of sealing circle body.

Independently cover plate 2 is arranged in the outside of described trough 3, and cover plate is fixed on by screw 4 and gets on the core rifle body 12.Like this, changed original welding fixed form, convenient processing and manufacture can be taken off cover plate when needing easily, and the side-wall coring rifle is keeped in repair.And the damage that the high temperature when having avoided welding may cause the lead in the trough.At cover plate and get between the core rifle body cover plate for sealing circle 1 can also be arranged.

Obviously, in igniting screw 6 outsides felt pad 13 is arranged.There is seal plug 14 the felt pad outside.

Other structures of this side-wall coring rifle and operating principle are identical with existing side-wall coring rifle.Be exactly, initial firing current passes to igniting screw 6 by the high temperature wire in the trough 3, ignites the medicine cake of loading in the magazine 7, and core tube 10 is injected the stratum, obtain formation samples, again by the steel wire in the steel wire rope groove with core tube 10 and whole side-wall coring sling to ground.

Claims

1. side-wall coring rifle, it have take away wire casing (3) get core rifle body (12), get in the magazine (7) of core rifle body core cylinder base (8) is installed, bleed screw (9) is installed on the core cylinder base, core cylinder base outside is equipped with core tube (10), getting of described magazine (7) outside igniting screw (6) is installed on the core rifle body, igniting screw and get sealing ring (5) is arranged between the core rifle body, also has steel wire rope groove (11) getting on the core rifle body, it is characterized in that, described sealing ring (5) is made of the sealing circle body of two relative tapers, and the opposite face of two sealing circle bodies is the minor diameter end face.

2. side-wall coring rifle as claimed in claim 1 is characterized in that, independently cover plate (2) is arranged in the outside of described trough (3), and cover plate is fixed on by screw (4) and gets on the core rifle body (12).