Casing centralizer and casing installation method

A technology of centralizer and casing, which can be used in casing, drill pipe, earth-moving drilling, etc., and can solve the problems of high risk and difficulty in running casing.

Pending Publication Date: 2021-05-11
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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[0005] The embodiment of the present disclosure provides a casing centralizer and a casing installation method, whic...

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  • Casing centralizer and casing installation method
  • Casing centralizer and casing installation method
  • Casing centralizer and casing installation method

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Embodiment Construction

[0044] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0045] figure 1 It is a structural schematic diagram of a casing centralizer provided by an embodiment of the present disclosure, please refer to figure 1 , the casing centralizer includes: a main body 1 and at least one centralizing block 2; the wall of the main body 1 is provided with at least one set of through holes in the axial direction, and each set of through holes includes at least two circumferentially symmetrical through holes The righting block 2 includes a connected sealing section 21 and a locking section 22, the outer diameter of the sealing section 21 is greater than the outer diameter of the locking section 22, and each sealing section 21 and locking section 22 in the centralizing block 2 According to the directio...

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Abstract

The invention provides a casing centralizer and a casing installation method, and belongs to the technical field of oil extraction equipment. According to the casing centralizer, the casing centralizer is arranged on a casing in a sleeve mode, a main body of the casing centralizer is provided with multiple movable centralizing blocks, in a lowering process of the casing, the centralizing blocks are fixed in a through holes of the main body, so that the outer diameter of the casing centralizer is smaller, the possibility that friction is generated between the casing centralizer and a well wall is small, lowering of the casing is facilitated, after the casing is lowered in place, the centralizing blocks can move outwards under the action of external force, so that the end parts of the clamping sections of the centralizing blocks abut against the well wall outside the casing, and centralizing of the casing is achieved. The casing centralizer is more suitable for a horizontal well or a large-displacement well, the casing lowering process is easy, and the risk in the casing lowering process is reduced.

Description

technical field [0001] The present disclosure relates to the technical field of oil production equipment, in particular to a casing centralizer and a casing installation method. Background technique [0002] During the construction of oil wells, casings and other equipment need to be lowered into the oil wells and then stabilized. In order to center the casings in the wellbore, casing centralizers are usually installed outside the casings. [0003] At present, the commonly used casing centralizers are bow-shaped elastic centralizers or rigid centralizers. The above two kinds of centralizers are in the open state during the well entry process. On the well wall, it realizes the righting of the casing. [0004] However, the outer diameter of casing centralizers commonly used at present is relatively large during the well entry process, resulting in large frictional resistance between the wellbore wall and the wellbore during the well entry process, especially in horizontal wel...

Claims

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Application Information

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IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 曲庆利闫永维王立辉曲宁王培张飙张海军
Owner PETROCHINA CO LTD
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