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Detachable threaded connection centering device

A threaded connection and disassembly technology, applied in drilling equipment, earth-moving drilling, drill pipe, etc., can solve the problem of centralizers failing to achieve the effect of centralizing and high cost, and achieve the effect of high cost performance, easy to move and easy to replace

Inactive Publication Date: 2016-08-31
CHENGDU LAIBAO PETROLEUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional centralizers, after the centralizer body deflects the film, the centralizer cannot achieve the centralizing effect. In order to achieve the centralizing effect, the usual method is to replace the centralizer as a whole, which leads to higher costs

Method used

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  • Detachable threaded connection centering device
  • Detachable threaded connection centering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Threaded removable centralizers such as figure 1 and figure 2 As shown, it includes a core body 1, joints 2 arranged at both ends of the core body 1, a centralizer 3 sleeved on the core body 1, and the core body 1 is connected by a first core block 11 and a second core block 12 through threads constitute;

[0029] The core body 1 where the first core block 11 and the second core block 12 are threaded is provided with a groove 4 for the socket installation of the centralizer 3 , and the groove 4 is arranged along the outer circumference of the core body 1 .

[0030] The centralizer 3 is composed of a socket body 31 matching the shape of the groove 4 , and a centralizing block 32 fixedly arranged on the socket body 31 along the axial direction of the socket body 31 .

Embodiment 2

[0032] The difference between this embodiment and Embodiment 1 is that in this embodiment, the centering block 32 is provided with a through hole 5 with a circular cross section, and a ball 6 is installed in the through hole 5 .

[0033] The through hole 5 is composed of a large through hole arranged on the side wall of the centralizer 3 and used to place the ball 6, and a small through hole arranged on the surface of the centralizer 32 for preventing the ball 6 from coming out and exposing the ball on the surface of the centralizer 32. Composition; the small through hole communicates with the large through hole and is located on the same central axis.

[0034] The connection between the small through hole and the large through hole is arc-shaped.

[0035] Diagonal guide strips 7 are arranged between the righting blocks 32 .

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Abstract

The invention discloses a detachable threaded connection centering device. The problem that high cost is caused by integrated replacement of the centering device after film deviation of a centering body is solved. The detachable threaded connection centering device comprises a core body (1), connectors (2) arranged at the two ends of the core body (1) and the centering body (3) connected to the core body (1) in a sleeving mode. The detachable threaded connection centering device is characterized in that the core body (1) is formed by connecting a first core block (11) and a second core block (12) in a threaded mode; a groove (4) used for mounting of the centering body (3) in a sleeving mode is formed in the part, at the threaded joint of the first core block (11) and the second core block (12), of the core body (1); and the groove (4) is formed in the periphery of the core body (1) by a circle. The detachable threaded connection centering device has the advantages that the structure is simple, and the replacement cost is greatly reduced.

Description

technical field [0001] The invention relates to a centralizer, in particular to a threaded detachable centralizer. Background technique [0002] The centralizer is a cementing tool. It is simple to manufacture, beautiful in structure, durable and strong in centralizing force. [0003] There are many types of centralizers, which can be divided into roller type, slider type, automatic reversing type, etc. according to the structure. Centralizers with different structures and materials are suitable for oil wells with different types of eccentric wear. The key technology of using centralizer anti-eccentric wear process is the position, spacing and quantity of centralizer installation. [0004] With conventional centralizers, the centralizer cannot achieve the centralizing effect after the centralizer body deflects the film. In order to achieve the centralizing effect, the usual method is to replace the centralizer as a whole, which leads to higher costs. Contents of the inve...

Claims

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Application Information

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IPC IPC(8): E21B17/10
CPCE21B17/10E21B17/1085
Inventor 谭正怀
Owner CHENGDU LAIBAO PETROLEUM EQUIP
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