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Oil pipe type centralizer

A centralizer and tubing-type technology, which is applied in the direction of drill pipe, casing, drilling equipment, etc., can solve the problems of not being able to play a centralizing role, not being able to adapt to reduced-diameter casing or belly section, etc., to achieve ingenious structural design, improve Adaptability and stability, the effect of improving stability

Active Publication Date: 2020-04-10
TIANJIN JINGGONG PETROLEUM PIPE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing tubing centralizers are generally of fixed diameter, which cannot be adapted to the shrinking casing or well sections with large bellies. In this case, the centralizer of fixed diameter cannot play a centralizing role

Method used

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  • Oil pipe type centralizer
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Embodiment Construction

[0027] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] In order to improve the defects in the use of centralizers in the prior art, the application embodiment of the present invention provides a tubing type centralizer, such as Figure 1-4 , including the first fixed ring 1, the second fixed ring 2, the sliding mechanism 3, the installation tube 4 and the diameter reducing mechanism 5, the first fixed ring 1, the second fixed ring 2 and the in...

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Abstract

The embodiment of the invention discloses an oil pipe type centralizer and belongs to the technical field of oil exploitation. The oil pipe type centralizer comprises a first fixed ring, a second fixed ring, a sliding mechanism, an installation pipe and diameter changing mechanisms. The first fixed ring and the second fixed ring are arranged above and below the installation pipe correspondingly and are both connected with the installation pipe through the sliding mechanism. The multiple diameter changing mechanisms are evenly arranged on the outer wall of the installation pipe. The oil pipe type centralizer further comprises an installation cavity, an annular airbag and an extrusion friction piece. The annular installation cavity is formed in the installation pipe and is filled with the annular airbag. The installation cavity communicates with the second end of a sliding groove. A slider abuts against the annular airbag. The extrusion friction piece is arranged in the position, towardthe installation pipe inner cavity, of the inner wall of the installation cavity. The extrusion friction piece abuts against the annular airbag. The oil pipe type centralizer is ingenious in structuredesign, good in centralizing effect, axial rotation of the installation pipe can be limited along with the change of the inner diameter of a casing, and adaptability and stability of an existing centralizer are improved significantly.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of oil exploitation, and in particular to an oil pipe type centralizer. Background technique [0002] The tubing centralizer is mainly used for straightening the tubing in the inclined well of the oil-water well, preventing the tubing from creeping and causing wear to the tubing and casing walls during the oil pumping process. Especially at the coupling of the tubing, since its outer diameter is significantly larger than that of the tubing, the probability of friction with the inner wall of the casing increases. If the coupling wears against the casing frequently and for a long time, the casing may be damaged. Wear-through, minor repairs are time-consuming and labor-intensive, and serious ones will directly lead to the scrapping of the oil well, affecting the normal production of the oil field. [0003] In the prior art, by sheathing a centralizer on the outer wall of the oil pipe,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
CPCE21B17/1021
Inventor 刘志超卢斌刘宗魁刘玉军韩宝宏
Owner TIANJIN JINGGONG PETROLEUM PIPE FITTINGS
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