CN201184141Y

CN201184141Y - Oil conduit inner centralizer

Info

Publication number: CN201184141Y
Application number: CNU2008200207454U
Authority: CN
Inventors: 沈长富; 王红芹; 艾和平; 付显威
Original assignee: 白霞
Priority date: 2008-04-20
Filing date: 2008-04-20
Publication date: 2009-01-21
Anticipated expiration: 2018-04-20

Abstract

An oil pipe inner centralizer is composed of an upper oil pipe, a collar and a lower oil pipe. The collar is connected with the upper oil pipe and the lower oil pipe; a variable diameter circular bead is arranged on the outer surface of a centralizing sleeve; the external diameter of the upper section of the variable diameter circular bead is larger than the internal diameters of the upper and the lower oil pipes; the external diameter of the lower section of the variable diameter circular bead is smaller than the internal diameters of the upper and the lower oil pipes; the upper section of the variable diameter circular bead is arranged between the upper oil pipe and the lower oil pipe; the lower section of the variable diameter circular bead is arranged in the lower oil pipe; and the centralizing sleeve is hung on the lower oil pipe. The oil pipe inner centralizer is mounted on an oil pipe post of an oil well using a continuous sucker rod for oil pumping; when the oil is pumped, the centralizing sleeve centralizes the continuous sucker rod, and can avoid the abrasion between the continuous sucker rod and the oil pipes. The oil pipe inner centralizer only needs to process the centralizing sleeve, the other parts are the prior oil pumping equipment, so that the production cost is low, the structure is simple, and the reliability is high.

Description

Centralizer in the oil pipe

One, technical field

The utility model is the equipment of using in the oil field pumping well, is centralizer in the oil pipe.

Two, background technology

In the sucker-rod pumping well, sucker rod is relative motion in contacting with oil pipe all the time, certainly existing wear problem, existing anti-wear method is to add centralizer on sucker rod, but on coiled rod, oil pumping rod centering device can't be installed, so with the oil well rod tube serious wear of coiled rod oil pumping.

Three, summary of the invention

The purpose of this utility model is a centralizer in a kind of oil pipe that is applicable to continuous bar pumpingh well that is installed on the tubing string of design.

The purpose of this utility model is achieved in that by last oil pipe, box cupling, oil pipe is formed down, box cupling connects with last oil pipe, following oil pipe, the supporting positive cover external surface has the reducing shoulder, reducing shoulder epimere external diameter is greater than last oil pipe, following pipe aperture, reducing shoulder hypomere external diameter is less than last oil pipe, following pipe aperture, reducing shoulder epimere is between oil pipe, the following oil pipe, and in the oil pipe, supporting positive cover was suspended on down on the oil pipe under reducing shoulder hypomere was in.

The beneficial effects of the utility model are: the utility model is installed on the oil well oil conduit post of pumping with coiled rod, and during oil pumping, supporting positive cover is set upright coiled rod, can avoid the wearing and tearing between coiled rod and the oil pipe.The utility model only need be processed supporting positive cover, and other parts are existing pumping unit, and therefore, cost of production is low, and is simple in structure, the reliability height.

Four, description of drawings

Accompanying drawing is the assembling drawing of the utility model embodiment.

Five, the specific embodiment

As shown in the figure, form by last oil pipe 1, box cupling 2, supporting positive cover 3, following oil pipe 4, box cupling 2 connects with last oil pipe 1, following oil pipe 4, supporting positive cover 3 external surfaces have the reducing shoulder, reducing shoulder epimere external diameter is greater than last oil pipe 1, following oil pipe 4 internal diameters, and reducing shoulder hypomere external diameter is less than last oil pipe 1, following oil pipe 4 internal diameters, and reducing shoulder epimere is between oil pipe 1, the following oil pipe 4, in the oil pipe 4, supporting positive cover 3 was suspended on down on the oil pipe 4 under reducing shoulder hypomere was in.Supporting positive cover 3 endoporus two ends are tubaeform, are convenient to pass through downhole tool.

Claims

1, centralizer in a kind of oil pipe, form by last oil pipe (1), box cupling (2), following oil pipe (4), it is characterized in that: box cupling (2) connects with last oil pipe (1), following oil pipe (4), supporting positive cover (3) external surface has the reducing shoulder, reducing shoulder epimere external diameter is greater than last oil pipe (1), following oil pipe (4) internal diameter, reducing shoulder hypomere external diameter is less than last oil pipe (1), following oil pipe (4) internal diameter, reducing shoulder epimere is between oil pipe (1), the following oil pipe (4), in the oil pipe (4), supporting positive cover (3) was suspended on down on the oil pipe (4) under reducing shoulder hypomere was in.

2, centralizer in the oil pipe according to claim 1, it is characterized in that: supporting positive cover (3) endoporus two ends are tubaeform.