CN202810695U

CN202810695U - Centralizer

Info

Publication number: CN202810695U
Application number: CN201220481324.8U
Authority: CN
Inventors: 田志宾
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2013-03-20
Anticipated expiration: 2022-09-19

Abstract

The utility model discloses a centralizer which comprises a centralizer connector, a centralizer main shaft, elastic piece fixing nuts, locking nuts and at least two metal elastic pieces. The centralizer connector is arranged at one end of the centralizer. One ends of the metal elastic pieces are fixed on the centralizer main shaft, and the other ends of metal elastic pieces are fixed on the elastic piece fixing nuts which can slide along the centralizer main shaft. The locking nuts are used for fixing the elastic piece fixing nuts. The centralizing diameter of the centralizer can be adjusted, the centralizer can be suitable for wells with different hole diameters, the fact that the position of a detecting device or a pipeline device is at a center can be guaranteed, centralizing effect is improved up to the hilt, and accordingly accuracy of detecting is improved, or a good fluid channel is provided.

Description

A kind of centralizer

Technical field

The utility model relates to a kind of erection device, particularly, relates to a kind of centralizer.

Background technology

Centralizer is used for testing arrangement or the plumbing installation of righting down-hole, be conducive to testing arrangement or sleeve pipe is placed in the middle in the down-hole, thereby guarantee the accuracy of test or good fluid flowing passage is provided, in traditional down-hole centralizing technology, generally be at centralizer body elastomeric element to be set, with cable or other conveyers centralizer is transferred to well, the elastomeric element of centralizer and the borehole wall are fitted, thereby guarantee the placed in the middle of testing arrangement or plumbing installation, but the caliber size of well differs, the centralizer that diameter is less is not suitable for the larger well of bore, the centralizer that diameter is larger is not suitable for the less well of bore, makes centralizer not have the effect that acts on or affect righting.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model discloses a kind of centralizer, the diameter of centralizer can be regulated, solved the big or small unmatched problem of centralizer diameter and well head.

Centralizer provided by the utility model, comprise centralizer sub, centralizer main shaft, shell fragment hold-down nut, locking nut and at least two metal clips, described centralizer sub is arranged on an end of described centralizer, one end of described metal clips is fixed on the described centralizer main shaft, the other end is fixed on the described shell fragment hold-down nut, described shell fragment hold-down nut can slide along described centralizer main shaft, and described locking nut is used for fixing described shell fragment hold-down nut.

Preferably, between described shell fragment hold-down nut and the locking nut spring is set.

Preferably, between described centralizer sub and the described metal clips sealing ring is set.

Preferably, described centralizer arranges blocking seat away from an end of described centralizer sub.

Centralizer righting diameter in the utility model can be regulated, can be applicable to the well of different pore size, the position that can guarantee testing arrangement or plumbing installation is placed in the middle, has improved to greatest extent the righting effect, thereby has improved the accuracy of test or good fluid passage is provided.

Description of drawings

Fig. 1 is the structural representation of centralizer among the utility model embodiment.

The specific embodiment

For making the purpose of this utility model, technical scheme and advantage clearer, hereinafter in connection with accompanying drawing embodiment of the present utility model is described in detail.Need to prove that in the situation of not conflicting, the embodiment among the application and the feature among the embodiment be any combination mutually.

Among the embodiment provided by the utility model, a kind of centralizer is provided, comprise centralizer sub 1, centralizer main shaft 2, shell fragment hold-down nut 4, locking nut 5 and at least two metal clips 3, described centralizer sub 1 is arranged on an end of described centralizer, one end of described metal clips 3 is fixed on the described centralizer main shaft 2, the other end is fixed on the described shell fragment hold-down nut 4, described shell fragment hold-down nut 4 can slide along described centralizer main shaft 2, and described locking nut 5 is used for fixing described shell fragment hold-down nut 4.

Centralizer sub 1 can be used for connecting downhole testing arrangement or down-hole pipe device, centralizer main shaft 2, shell fragment hold-down nut 4, locking nut 5 and metal clips 3 have consisted of the centralizer diameter regulating device, shell fragment hold-down nut 4 can slide along centralizer main shaft 2, when running into the larger well of bore, can increase by regulating shell fragment hold-down nut 4 angle of shell fragment bending, and then the diameter of increase centralizer, when the caliber size of centralizer diameter and well is consistent, come the position of locking spring plate hold-down nut 4 by locking nut 5, the angle of bend of metal clips 3 is no longer changed, equally, when running into the less well of bore, can reduce by regulating shell fragment hold-down nut 4 angle of shell fragment bending, and then reduce the diameter of centralizer, when the caliber size of centralizer diameter and well is consistent, come the position of locking spring plate hold-down nut 4 by locking nut 5, the angle of bend of metal clips 3 is no longer changed.

Certainly, between shell fragment hold-down nut 4 and the locking nut 5 spring 7 is set again, by the angle of bending that cooperatively interacts to change metal clips 3 of spring 7 and shell fragment hold-down nut 4, thereby changes the size of centralizer diameter.

When centralizer is used for righting downhole testing device, centralizer also is used for transmitting test signal, therefore, must guarantee the sealing between metal clips 3 and the centralizer sub 1, therefore, sealing ring 8 is set between centralizer sub 1 and the metal clips 3 again and guarantees between the two sealing.

When centralizer is used for righting underground wireless communication pipe nipple, blocking seat 6 can be set at the least significant end of centralizer, the Main Function of blocking seat 6 is location, guarantee that the relay reception pipe nipple can be in optimal position and carry out wireless telecommunications, the external diameter of blocking seat 6 stops the ring internal diameter greater than the location of insulating short section, in work progress, the location that blocking seat 6 just is sitting in insulating short section stops on the ring, and the effect that receives herein the low-frequency electromagnetic wave wireless signal is best.

It should be noted that at last: the above only is preferred embodiment of the present utility model, be not limited to the utility model, although with reference to previous embodiment the utility model is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. centralizer, it is characterized in that: comprise centralizer sub, centralizer main shaft, shell fragment hold-down nut, locking nut and at least two metal clips, described centralizer sub is arranged on an end of described centralizer, one end of described metal clips is fixed on the described centralizer main shaft, the other end is fixed on the described shell fragment hold-down nut, described shell fragment hold-down nut can slide along described centralizer main shaft, and described locking nut is used for fixing described shell fragment hold-down nut.

2. centralizer as claimed in claim 1 is characterized in that: between described shell fragment hold-down nut and the locking nut spring is set.

3. centralizer as claimed in claim 1 is characterized in that: between described centralizer sub and the described metal clips sealing ring is set.

4. such as claim 1,2 or 3 described centralizers, it is characterized in that: described centralizer arranges blocking seat away from an end of described centralizer sub.