Cutting device for oil well down-hole pipe column and use method of cutting device

A downhole pipe string and cutting device technology, which is applied in the direction of wellbore/well parts, earthwork drilling and production, etc., can solve the problems of difficult pulling out of stuck well pipe strings, tedious workover process and long time, so as to reduce the labor intensity of employees, The effect of reducing workover construction steps and reducing workover time

Pending Publication Date: 2020-07-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an oil well downhole pipe string cutting device and its use method, which overcomes the problems in the prior art such as the difficulty in pulling out the stuck pipe string and the tedious and long workover process. The oil well downhole pipe string cutting device The use method thereof can reduce the workover construction steps when the pipe string is stuck in the well, reduce the workover time, reduce the workover cost, and reduce the labor intensity of employees

Method used

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  • Cutting device for oil well down-hole pipe column and use method of cutting device
  • Cutting device for oil well down-hole pipe column and use method of cutting device
  • Cutting device for oil well down-hole pipe column and use method of cutting device

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Embodiment Construction

[0060] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0061] Figure 1 to Figure 15 As shown, the present invention provides an oil well downhole pipe string cutting device 100, which includes a main shaft 6, a cutting part is rotatably sheathed on the outer wall of the main shaft 6, and the cutting part includes a knife arm that can swing radially, expand and contract and can rotate circumferentially 4. The cutter arm 4 is provided with a scraper 3 capable of rotating and cutting the oil well downhole tubing string 52 from the inside (the inside of the oil well downhole tubing string 52 (the oil well downhole tubing string 52 scraped by the scraper 3 is the part stuck in the well). In this embodiment, the scratching knife 3 is welded on the knife arm 4; the top of the main shaft 6 ...

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Abstract

The invention provides a cutting device for an oil well down-hole pipe column and a use method of the cutting device. The device comprises a spindle. The outer wall of the spindle is rotationally sleeved with a cutting portion. The cutting portion comprises a knife arm capable of radially swinging and stretching and shrinking and capable of circumferentially rotating. A utility knife capable of rotationally cutting the oil well down-hole pipe column from the interior is arranged on the knife arm. A drive portion capable of driving the spindle to rotate is arranged on the top of the spindle ina connected manner. The cutting device for the oil well down-hole pipe column further comprises a control portion arranged on the ground. The control portion is electrically connected with the drive portion. According to the cutting device for the oil well down-hole pipe column and the use method of the cutting device, well repair construction steps during pipe column well jamming can be reduced,the well repair time is shortened, the well repair cost is reduced, and the labor intensity of staff is reduced.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to an oil well downhole pipe string cutting device and a use method thereof for oil well downhole pipe string fault workover. Background technique [0002] With the deepening of oilfield development and the prolongation of oil well production time, downhole failures of oil wells have increased. One of the failures is that the pipe string that has been lowered into the deep part of the oil well is stuck in the well, causing the oil well to fail to produce oil. The common faults of the stuck pipe string are: 1. It is oil well formation sand stuck pipe string, oil well with severe sand production will bury the pipe string in the well by formation sand for hundreds of meters, causing the downhole pipe string to get stuck in the well; the second is the deformation of the deep casing of the oil well and the stuck pipe string, the casing Deformation mostly occurs in heavy oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/00
CPCE21B29/005
Inventor 陈伟东杨波贾海舰边荣军袁勇程斌刘如杰于新
Owner PETROCHINA CO LTD
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