CN214660008U - Universal rotary oil pipe centralizer - Google Patents

Abstract

The utility model relates to an underground tool for an oil field exploration well, an inclined well or a horizontal well, which is named as a universal rotary oil pipe centralizer and comprises a coupling and a centralizing pipe, wherein the centralizing pipe is divided into an inner pipe and an outer pipe, the lower part of the coupling is connected with the upper part of the outer pipe, the outer pipe is arranged on the upper side of the inner pipe and sleeved outside the upper side of the inner pipe, and the outer pipe can rotate around the inner pipe in a sealing way; the downside of the outer tube on the outer wall of inner tube, a plurality of recesses are equipped with a plurality of recesses, and a plurality of recesses circumference array distributes on the outer wall of inner tube, all installs universal ball in every recess, and universal ball is outmost along being greater than the radius of outer tube to the distance of axis, and such oil pipe centralizer can make the friction loss between oil pipe and the sleeve pipe little, can not cause the damage of oil well.

Description

Universal rotary oil pipe centralizer

Technical Field

The utility model relates to an oil field deep well, inclined shaft or horizontal well's downhole tool, especially an oil pipe centralizer.

Background

Some oil-water wells are as deep as thousands of meters, some oil-water wells are inclined wells or horizontal wells, oil pipes need to be lifted from the deep wells, the inclined wells or the horizontal wells during workover operation, the friction force between the outer walls of the oil pipes and the inner walls of the casings is large, abrasion is generated, the oil pipes and the casings are easy to damage, the oil pipes need to be replaced when damaged, the capital investment of the oil wells is increased, the use is influenced due to the loss of the oil wells caused by the damage of the casings,

in the prior art, the technology of installing rollers in the vertical direction on the side wall of an oil pipe exists, but the arrangement can only reduce sliding friction when the oil pipe moves up and down, and can still wear when the oil pipe moves in other directions, so that the service life of the oil pipe is shortened.

Disclosure of Invention

The utility model aims at above-mentioned shortcoming, provide an oil pipe centralizer, reduce the friction loss between oil pipe outer wall and the cover inside pipe wall, improve oil pipe and sheathed tube life, can make oil pipe remove in arbitrary direction and can both reduce wear.

The technical scheme of the utility model is realized like this: universal rotation type oil pipe centralizer, including coupling and righting pipe, characterized by: the righting pipe is divided into an inner pipe and an outer pipe, the lower part of the coupling is connected with the upper part of the outer pipe, the outer pipe is arranged on the upper side of the inner pipe and sleeved on the outer side of the upper side of the inner pipe, and the outer pipe can rotate around the inner pipe in a sealing manner; the outer wall of the inner pipe, the downside of outer pipe is equipped with a plurality of recesses, a plurality of recesses circumference array distribution on the outer wall of inner pipe, all install universal ball in every recess, the distance of universal ball outermost edge to the axis is greater than the radius of outer pipe.

Further, a second outer pipe is sleeved on the outer side of the lower side of the inner pipe, and the second outer pipe can rotate around the inner pipe.

Further, the grooves are arranged in a plurality of rows.

The utility model has the advantages that: the oil pipe centralizer has the advantages of low friction loss between the outer wall of the oil pipe and the inner wall of the casing, long service life, multiple use times and capability of reducing abrasion when the oil pipe moves in any direction.

Drawings

Fig. 1 is a schematic longitudinal sectional structure of the present invention.

Fig. 2 is a schematic longitudinal section of the present invention used in an oil pipe.

Fig. 3 is an enlarged schematic view at a of fig. 1.

Fig. 4 is an enlarged schematic view at B of fig. 1.

Wherein, 1, a coupling 2, an inner tube 3, an outer tube 4, a groove 5, a universal ball 6, a sleeve 7, a second outer tube 8 and a rotating shaft rubber seal.

L is the distance from the outermost edge of the ball to the axis.

R-radius of the outer tube.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1, 2, 3 and 4, the universal rotary tubing centralizer comprises a coupling 1 and a centralizing pipe, and is characterized in that: the righting pipe is divided into an inner pipe 2 and an outer pipe 3, the lower part of the coupling is connected with the upper part of the outer pipe 3, the outer pipe is arranged on the upper side of the inner pipe and sleeved on the outer side of the upper side of the inner pipe, and the outer pipe can rotate around the inner pipe in a sealing manner; the downside of the outer tube on the outer wall of inner tube is equipped with a plurality of recesses 4, and a plurality of recesses circumference array distributes on the outer wall of inner tube, all installs universal ball 5 in every recess, and universal ball is outmost along being greater than the radius R of outer tube to the distance L of axis.

The using method comprises the following steps: the device is taken off from the sleeve 6 of the oil well, and when the oil pipe is taken off, the universal ball on the outer wall of the inner pipe is in rolling friction with the inner wall of the sleeve when in contact, so that the friction loss between the outer wall of the inner pipe and the inner wall of the sleeve is reduced, and the service life of the oil pipe can be prolonged.

The outer pipe can rotate on the inner pipe in a sealing way, so that an oil pipe put into a well can rotate easily and freely, and the operation requirement of rotating the oil pipe can be met; many components for realizing sealed rotation exist in the prior art, such as a rotating shaft rubber seal 8 and the like.

Further, a second outer tube 7 is sleeved outside the lower side of the inner tube, and the second outer tube can rotate around the inner tube.

Therefore, the oil pipe is not easy to be lost in the operation of rotating the oil pipe, and the service life can be prolonged.

Further, the grooves are arranged in a plurality of rows.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the description of the present invention.

Claims (3)

1. Universal rotation type oil pipe centralizer, including coupling and righting pipe, characterized by: the righting pipe is divided into an inner pipe and an outer pipe, the lower part of the coupling is connected with the upper part of the outer pipe, the outer pipe is arranged on the upper side of the inner pipe and sleeved on the outer side of the upper side of the inner pipe, and the outer pipe can rotate around the inner pipe in a sealing manner; the outer wall of the inner pipe, the downside of outer pipe is equipped with a plurality of recesses, a plurality of recesses circumference array distribution on the outer wall of inner pipe, all install universal ball in every recess, the distance of universal ball outermost edge to the axis is greater than the radius of outer pipe.

2. The universal rotary tubing centralizer of claim 1, wherein: and a second outer pipe is sleeved on the outer side of the lower side of the inner pipe and can rotate around the inner pipe.

3. The universal rotary tubing centralizer of claim 1 or 2, wherein: the grooves are arranged in an upper row and a lower row.

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