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Workover device and workover method

A well workover, cylindrical technology, applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problems of unsuccessful workover, damage to cementing cement sheath, etc. The effect of the possibility of cement sheaths or other components

Active Publication Date: 2019-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the drilling operation, there is still a possibility that the cement sheath will be damaged again and the workover will be unsuccessful

Method used

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  • Workover device and workover method
  • Workover device and workover method
  • Workover device and workover method

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Experimental program
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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing.

[0027] figure 1 The structure of the workover device 100 according to the present invention is schematically shown. Such as figure 1 As shown, the workover device 100 includes a tubular body 4 that passes through. An inner injection pipe 2 is slidably installed inside the cylindrical body 4 , and a packer, such as a packer 5 and a packer 10 , is arranged axially on the outside of the cylindrical body 4 . Between the packer 5 and the packer 10 is a space 12 . It should be noted that the outer diameter of the cylindrical body 4 , together with the packer 5 and the packer 10 should be smaller than the inner diameter of the casing 13 , so that the workover device 100 can be inserted into the casing 13 smoothly. The packer 5 and the packer 10 are components well known to those skilled in the art, and will not be repeated here.

[0028] The lower end 14 of the inner injectio...

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Abstract

The invention relates to a well repairing device and a well repairing method. The well repairing device comprises a through cylindrical main body and an inner injection pipe, wherein at least two packers are axially arranged on the outer portion of the cylindrical main body, and an interval is formed between every two adjacent packers; and the inner injection pipe is slidably mounted in the cylindrical main body, the upper end of the inner injection pipe is open, the lower end of the inner injection pipe is closed and located in the cylindrical main body, outlet holes are further formed in theside wall of the inner injection pipe, and injection holes which can communicate with the outlet holes are formed in the regions, located in the intervals, of the cylindrical main body. The well repairing device can be used for solving the out-of-pipe fluid channeling problem of oil wells and gas wells, and drilling-removing operation is not needed after well repairing is completed.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a workover device. The present invention also relates to a method for well intervention using the well intervention device of the present invention. Background technique [0002] After the downhole casing of an oil or gas well is cemented and produced, due to reasons such as cementing quality and complex formations, it is very easy to cause partial damage to the cement sheath between the casing and the well wall, resulting in water outside the casing. , gas channeling and other issues, which will greatly reduce the production life of oil and gas wells, and lead to hidden dangers in safe production and operational risks. [0003] At present, for the problem of channeling outside the pipe, the most commonly used workover method is: lowering the bottom packer into the casing to a position below the problem layer of the casing. Then, a workover device (such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13E21B33/124
CPCE21B33/124E21B33/13
Inventor 姚凯李晓益赵煊张同义翟羽佳彭汉修艾爽毛军段友智刘欢乐
Owner CHINA PETROLEUM & CHEM CORP