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Packer, tubular column and method for quick leakage finding of whole shaft

A packer and wellbore technology, applied in the field of oil drilling, can solve problems such as unreasonable pipe string structure

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the defects in the prior art, the purpose of the present invention is to solve the technical problem that the structure of the pipe string in the prior art is unreasonable and the leak detection can only be realized by multiple trips of the pipe string, and to provide a packer for rapid leak detection in the whole wellbore , pipe string and method thereof, the structure of the leak-finding pipe string in the present invention is reasonable, and one trip of the pipe string realizes leak-finding

Method used

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  • Packer, tubular column and method for quick leakage finding of whole shaft
  • Packer, tubular column and method for quick leakage finding of whole shaft
  • Packer, tubular column and method for quick leakage finding of whole shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 5 with Image 6 The shown packer 11 is used for rapid leak detection in the whole wellbore. The packer 119 includes a center pipe-904, the upper end and the lower end of the center pipe-904 are respectively connected with an upper joint-903 and a lower joint-901, and the center pipe-1 The upper sleeve of 904 is equipped with a rubber cartridge 905 and a lower seat 907 of the rubber cartridge. The lower seat 907 of the rubber cartridge can slide up and down along the outer wall of the lower joint. The central pipe 904 is connected with a sliding sleeve 908, a sliding sleeve 908 and a central pipe 904. A shearing pin 909 is set between them, and the rubber cartridge lower seat 907 is in contact with the downward end of the rubber cartridge lower seat 907; the inner wall of the lower part of the rubber cartridge lower seat 907 is threaded to a limit ring 911, and the limit ring 911 can be moved along the lower joint. One 901 slides up and down, and the low...

Embodiment 2

[0044] Such as figure 1 The upper bound leak-finding string that uses the packer 119 for upper bound leak-finding includes the upper bound pipe string body 8, and the upper bound string body 8 is sequentially connected with the upper bound packer 2, 2, Pressure relief valve one 3, packer 119, pressure test valve one 4, upper boundary restrictor 5, upper boundary packer one 6 and ball seat one 7, the outer diameter of ball seat one 7 is less than or equal to the diameter of the well gauge , to play the role of well opening and protection, and righting packer rubber tube 905; upper boundary packer one 6, upper boundary packer two 2, packer 119, upper boundary restrictor 5, pressure test valve one 4. Ball seat one 7 and pressure relief valve one 3 are coaxially arranged.

Embodiment 3

[0046] The method of using the upper bound leak-finding pipe string to carry out the upper bound leak-finding method, the upper end of the upper bound pipe string body 8 is connected with a leak-finding pipe string 1, and the leak-finding pipe string 1 includes a hose-101 connected to the pipe string body Connect with hose 2 105, hose 1 101 with the tubing, hose 2 105 with the oil casing annulus outside the tubing, and hose 1 101 and hose 2 105 outside the wellhead are respectively connected with valve 102 and valve Two 104, the valve one 102 and the liquid inlet of the valve are connected together through the liquid inlet pipe, and the liquid inlet of the liquid inlet pipe is connected with a pump truck 103, including the following steps,

[0047] (101) Lower the leak-finding string in the upper boundary to 20 meters above the initial judgment position of the leak point;

[0048] (102) Drop ball pressure test valve one 4, open valve two 104, open valve one 102, pump truck 103...

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Abstract

The invention provides a packer, a pipe column and a method for quick leakage finding of a whole shaft in the technical field of petroleum drilling. The packer comprises a first central pipe, the upper end and the lower end of the first central pipe are connected with a first upper connector and a first lower connector correspondingly, the first central pipe is sleeved with a first rubber sleeve and a rubber sleeve lower seat, the rubber sleeve lower seat can slide up and down along the outer wall of the lower connector, a first sliding sleeve is connected into the first central pipe, a first shear pin is arranged between the first sliding sleeve and the first central pipe, and the rubber sleeve lower seat abuts against the downward end of the rubber sleeve lower seat. According to the packer, the pipe column and the method for quick leakage finding of the whole shaft, rapid leakage finding of a tubular column is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a full wellbore quick leak detection pipe string and method. Background technique [0002] During the long-term development of the oilfield, due to factors such as frequent operation and casing corrosion, the casing of oil and water wells leaks, the water cut in the oil well rises, and the water well cannot be injected normally, which affects the normal development of the oilfield. Usually, a mechanical leak-finding string is used to verify the leakage of the casing, accurately find the leak point, and provide a reliable basis for the next step to formulate a reasonable construction plan. [0003] In the prior art, the use of the packer leak detection process string can accurately determine the leak location, the construction is simple, the structure is reliable, and it is an effective leak detection method, but the success rate of this method is relatively low, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/122E21B47/117
CPCE21B33/122
Inventor 储明来叶红钱国全钱红彬张家胜
Owner CHINA PETROLEUM & CHEM CORP
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