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Packer, string and method for rapid leak detection in whole wellbore

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

Active Publication Date: 2022-08-09
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, string and method for rapid leak detection in whole wellbore
  • Packer, string and method for rapid leak detection in whole wellbore
  • Packer, string and method for rapid leak detection in whole wellbore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like Figure 5 and Image 6 The shown packer 11 for rapid leak detection in the whole wellbore, the packer 9 includes a central pipe 904, the upper and lower ends of the central pipe 904 are respectively connected with an upper joint 903 and a lower joint 901, and the central pipe 1 A rubber barrel 905 and a rubber barrel lower seat 907 are set on the 904. The rubber barrel lower seat 907 can slide up and down along the outer wall of the lower joint. The central tube 904 is connected with a sliding sleeve 908. The sliding sleeve 908 and the central tube 904 are connected. A shearing pin 909 is set between the two parts, and the lower seat 907 of the rubber barrel is in contact with the downward end of the lower seat 907 of the rubber barrel; the inner wall of the lower part of the lower seat 907 of the rubber barrel is threadedly connected with a limit ring 911, and the limit ring 911 can be along the lower joint one. 901 slides up and down, a limit step 913 is set at ...

Embodiment 2

[0044] like figure 1 The upper bound leak-finding string using the packer 9 for upper bound leak detection shown includes the upper bound string body 8, and the upper bound string body 8 is sequentially connected with the upper bound packer 2, 2 and 2 from top to bottom. Pressure relief valve 1 3, packer 9, pressure test valve 1 4, upper limit restrictor 5, upper bound packer 1 6 and ball seat 1 7, the outer diameter of ball seat 1 7 is less than or equal to the diameter of the well gauge , play the role of well opening and protection, and righting the packer rubber cylinder 905; upper bound packer 1 6, upper bound packer 2 2, packer 9, upper bound choke 5, pressure test valve 1 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 string to detect leaks in the upper bound. The upper end of the upper bound tubing string body 8 is connected with a leak-seeking string 1, and the leak-seeking string 1 includes a hose-101 connected to the body of the tubing string. and the second hose 105, the first hose 101 is connected with the oil pipe, the second hose 105 is connected with the oil casing annulus outside the oil pipe, and the first hose 101 and the second hose 105 outside the wellhead are respectively connected with a valve one 102 and a 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 upper bound leak detection string to 20 meters above the initial leak point judgment position;

[0048] (102) Throwing ball pressure test valve 1 4, open valve 2...

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Abstract

The invention provides a packer, a pipe string and a method for rapid leak detection in the whole wellbore in the technical field of oil drilling. The lower joint 1, the central tube 1 is covered with a rubber tube 1 and a rubber tube lower seat, the rubber tube lower seat can slide up and down along the outer wall of the lower joint, the central tube 1 is connected with a sliding sleeve 1, and the sliding sleeve 1 and the central tube 1 are connected. A shearing pin is arranged between the two, and the lower seat of the rubber barrel is in contact with the downward end of the lower seat of the rubber barrel; the present invention realizes quick leak detection in one trip of the pipe string.

Description

technical field [0001] The invention relates to the technical field of oil drilling, in particular to a whole wellbore rapid leak finding pipe string and method. Background technique [0002] During the long-term development of the oilfield, due to frequent operations, casing corrosion and other factors, the oil-water well casing leaks, the water content of 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 casing leakage, accurately find the leakage point, and provide a reliable basis for formulating a reasonable construction plan in the next step. [0003] In the prior art, the use of the packer to find the leakage process pipe string can accurately determine the position of the leakage, the construction is simple, the structure is reliable, and it is an effective method for leakage detection. Reasonably, it takes several trips of the pipe...

Claims

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Application Information

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Patent Type & Authority Patents(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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