CN201187264Y

CN201187264Y - Centralizer

Info

Publication number: CN201187264Y
Application number: CNU2008203003247U
Authority: CN
Inventors: 才景润
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-28
Filing date: 2008-03-11
Publication date: 2009-01-28
Anticipated expiration: 2018-03-11

Abstract

The utility model relates to a well repair tool in an oil field, that is, a centralizer. The centralizer comprises two half-and-half cylinder bodies; convex and concave rail grooves which are spliced and combined into a whole body in the axial direction, are arranged on the opposite surfaces of each half-and-half cylinder body, a helical strip-shaped boss is arranged on the outer surface of each cylinder body in the axial direction, and an internally concave surface protective joint is arranged at the end part of one of the two cylinder bodies. When in installation and user, the two half-and-half cylinder bodies are spliced and combined into a whole body, and are tightly clamped on a pumping rod. The centralizer has the advantages of simple structure and convenient installation, and can effectively remove accumulated wax on the inner surface of an oil pipe.

Description

Centralizer

Technical field

The utility model relates to a kind of oil field workover tool, i.e. centralizer.

Background technology

In prior art, centralizer is installed and is connected on the sucker rod, prevents that sucker rod from bumping with the oil cylinder inner wall mill in oil pumping process.Existing centralizer is made up of one section short circuit bar and the rubber sliding sleeve on it, and the short circuit bar is connected between per two sucker rods, and km on the sucker rod after connecting is usually installed very trouble, also disconnects in the junction easily, and influence is produced.

The utility model content

The purpose of this utility model is to provide a kind of easy for installation, the service-strong centralizer at above-mentioned deficiency.

Technical solution of the present utility model is: centralizer comprises two double cylinders (cylinder that is divided into two along shaft centre line), the convex-concave rail groove that has grafting vertically to be combined into one on each cylinder opposite face, each cylinder external surface has the strip-spiral boss vertically, and one of them cylinder upper end has inner concave and protects joint.When installing and using, mutual vertically one pushes and plugs to connect and can form an integral body, and tightly anchor ear is on sucker rod.Along with the connection of the sucker rod of going into the well, a centralizer in time is installed on each sucker rod is got final product.Protect the joint anchor ear between sucker rod round end and square body, can prevent that centralizer from turning round around sucker rod.The strip-spiral boss not only can allow crude oil in the oil pipe by but also can scrape off the extension wax of pipe inner surface.The semicircle cylindrical shell adopts engineering plastic materials.

The utility model has the advantages that: 1, adopt double structure of two bodies, simple in structure, easy for installation.2, each cylinder external surface has the strip-spiral boss vertically, helps scraping the long-pending wax on the pipe inner surface in the middle of operation, enhances productivity.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is the utility model assembling back structure diagram;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a semicircular cylinder body structure sketch;

Fig. 4 is another corresponding semicircular cylinder body structure sketch;

Fig. 5 is that sketch is amplified in the bottom surface of Fig. 1.

The specific embodiment

Referring to Fig. 1,2,3,4, centralizer comprises two double cylinders 1,2.The convex-concave rail groove 11 (referring to Fig. 5) that has grafting vertically to be combined into one on each cylinder 1,2 opposite face.Each cylinder 1,2 external surface has strip-spiral boss 3 vertically, and one of them cylinder upper end has inner concave and protects joint 4.Dotted line is sucker rod 5 outline drawings among the figure, and sucker rod 5 upper ends are circular arc head 6 and square body 7, and the indent bread that inner concave protects joint 4 is buckled between the circular arc head 6 and square body 7 of sucker rod 5 upper ends, and it can not be turned round around axis.Corresponding second half cylinder 2 upper ends do not have protects joint, is beneficial to the interior crude oil of oil cylinder and passes through centralizer.

Referring to Fig. 3,4, one of them cylinder 2 top has one section outer protruding rail 8 and bottom that one section inner groovy 9 is arranged, and corresponding another cylinder 1 top has one section inner groovy 9 and bottom that one section outer protruding rail 8 is arranged.Outer protruding rail 8 is formed convex-concave rail groove 11 with inner groovy 9.Convex-concave rail groove 11 terminal rail edges are provided with locking slot 10, the respective slot distal edge along on protruding ridge is arranged, block after making two cylinders 1,2 plug together and can not after scurry, can not relax because of use.When plugging together, before the outer protruding rail 8 among Fig. 3 is aligned in inner groovy 9 among Fig. 4, before the inner groovy 9 among Fig. 3 is aligned in outer protruding rail 8 among Fig. 4 simultaneously,, then form centralizer Fig. 1 position firmly axially to pushing away.

Be processed with the radially line of rabbet joint (figure slightly) that increases frictional force on the center hole inner surface of two double cylinder, 1,2 compositions, make two cylinders 1,2 plug together closely.

Claims

1. centralizer, it is characterized in that comprising two double cylinders (1,2), the convex-concave rail groove (11) that has grafting vertically to be combined into one on each cylinder (1,2) opposite face, each cylinder (1,2) external surface has strip-spiral boss (3) vertically, and one of them cylinder (1) upper end has inner concave and protects joint (4).

2. according to the described centralizer of claim 1, it is characterized in that a cylinder (2) top has one section outer protruding rail (8) and bottom that one section inner groovy (9) is arranged, corresponding another cylinder (1) top has one section inner groovy (9) and bottom that one section outer protruding rail (8) is arranged.

3. according to the described centralizer of claim 2, it is characterized in that convex-concave rail groove (11) terminal rail along being provided with locking slot (10), corresponding inner groovy (9) distal edge along on protruding ridge is arranged.

4. according to the arbitrary described centralizer of claim 1-3, it is characterized in that being processed with the radially line of rabbet joint that increases frictional force on the center hole inner surface that two double cylinders (1,2) form.