CN204984295U

CN204984295U - Elasticity centralizer

Info

Publication number: CN204984295U
Application number: CN201520696873.0U
Authority: CN
Inventors: 欧荣华
Original assignee: Yancheng Huazhan Petroleum Machinery Co Ltd
Current assignee: Yancheng Huazhan Petroleum Machinery Co Ltd
Priority date: 2015-09-10
Filing date: 2015-09-10
Publication date: 2016-01-20
Anticipated expiration: 2025-09-10

Abstract

The utility model provides an elasticity centralizer, its hoop group that includes both ends with be located a plurality of bow -shaped shell fragment of both ends hoop between organizing, bow -shaped shell fragment is the bilateral symmetry structure, its arc structure that has two outside hunch -ups, and the both ends of its bow -shaped shell fragment are equipped with protruding structure, the hoop group at both ends constitutes by a plurality of hoops, be equipped with on the hoop a plurality of for with protruding structure matched with square hole, through the round pin hub connection between the adjacent hoop of the hoop of each end group, the protruding structure of two tip of bow -shaped shell fragment respectively with the hoop at both ends on square hole buckle and fixed connection. Hoop and bow -shaped shell fragment are all handled through the acute angle abate.

Description

A kind of elastic centralizer

Technical field

The utility model relates to a kind of elastic centralizer.

Background technology

Domestic for the centralizer in cementing operation at present, its Main Function is that the positive sleeve pipe of report is placed in the middle in pit shaft, and existing centralizer is divided into rigid centralizer and the large class of elastic centralizer two:

1, rigid centralizer is structure as a whole, can not flexing, and its diameter is steady state value, can not change, and cannot realize expanding;

2, elastic centralizer is woven by the hoop at two ends and several bow-shaped shrapnels or is welded together, its firmness affects by welding quality, may damage because welding quality is bad in use procedure, welded construction makes bearing capacity reduce simultaneously, casing centralization can not be guaranteed, product reliability is poor, and precision is low.

Summary of the invention

In order to overcome the defect of prior art, the utility model provides following technical scheme:

A kind of elastic centralizer, it comprises the hoop group at two ends and the some bow-shaped shrapnels between the hoop group of two ends, described bow-shaped shrapnel is bilateral symmetry, it has two arcuate structures outwards arched upward, the two ends of its bow-shaped shrapnel are provided with bulge-structure, the hoop group at described two ends forms by some hoops, described hoop is provided with some square holes in order to match with bulge-structure, pinned connection is passed through between the adjacent hoop of the hoop group of every one end, the bulge-structure of two ends of described bow-shaped shrapnel is fixedly connected with the square hole buckle on the hoop at two ends respectively.

Further, described hoop and bow-shaped shrapnel are all through the process of acute angle abate.

The beneficial effect that the utility model brings is: of good reliability, and precision is high, can guarantee casing centralization.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Detailed description of the invention

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection domain of the present utility model.

As shown in Figure 1, a kind of elastic centralizer, it comprises the hoop group at two ends and the some bow-shaped shrapnels 2 between the hoop group of two ends, described bow-shaped shrapnel 2 is bilateral symmetry, it has two arcuate structures outwards arched upward 3, the two ends of its bow-shaped shrapnel 2 are provided with bulge-structure 4, the hoop group at described two ends forms by some hoops 1, described hoop is provided with some square holes 11 in order to match with bulge-structure, pinned connection is passed through between the adjacent hoop of the hoop group of every one end, the bulge-structure of two ends of described bow-shaped shrapnel is fixedly connected with the square hole buckle on the hoop at two ends respectively.Described hoop 1 and bow-shaped shrapnel 2 are all through the process of acute angle abate.

The above; be only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the utility model; the change can expected without creative work or replacement, all should be encompassed within protection domain of the present utility model.Therefore, the protection domain that protection domain of the present utility model should limit with claims is as the criterion.

Claims

1. an elastic centralizer, it comprises the hoop group at two ends and the some bow-shaped shrapnels (2) between the hoop group of two ends, it is characterized in that, described bow-shaped shrapnel is bilateral symmetry, it has two arcuate structures outwards arched upward (3), the two ends of its bow-shaped shrapnel are provided with bulge-structure (4), the hoop group at described two ends forms by some hoops (1), described hoop is provided with some square holes (11) in order to match with bulge-structure, pinned connection is passed through between the adjacent hoop of the hoop group of every one end, the bulge-structure of two ends of described bow-shaped shrapnel is fixedly connected with the square hole buckle on the hoop at two ends respectively.

2. a kind of elastic centralizer according to claim 1, is characterized in that, described hoop and bow-shaped shrapnel are all through the process of acute angle abate.