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Screen pipe completion selective plugging process pipe string

A well completion technology for process strings and screens, which is applied in sealing/isolation, wellbore/well components, production fluids, etc., can solve problems such as no longer meeting the development needs, and achieve precise and selective sealing of layers, The effect of simple structure and safe construction

Active Publication Date: 2020-03-27
CNPC BOHAI DRILLING ENG +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in screen completion operations, due to complex conditions such as geological conditions and development benefits, reservoirs located in different layers in the same production well may no longer meet the development requirements due to different reasons. Therefore, according to the production Demand requires selective mining of different horizons

Method used

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  • Screen pipe completion selective plugging process pipe string
  • Screen pipe completion selective plugging process pipe string
  • Screen pipe completion selective plugging process pipe string

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0015] Such as Figure 1~3 As shown, the screen completion selective plugging process string is suitable for the well completion construction process of production wells with upper, middle and lower production layers, which specifically includes the outer layer string and the inner layer of the outer layer string And it can cooperate with the outer layer pipe string and be used for sealing the first inner layer pipe string, the second inner layer pipe string and the third inner layer pipe string of the lower production layer, the middle layer production layer and the lower layer production layer respectively.

[0016] Such as figure 1 As shown, the outer string includes a lower screen assembly, a middle screen assembly, and an upper screen assembly arranged at intervals in th...

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Abstract

The invention discloses a screen pipe completion selective plugging process pipe string. The screen pipe completion selective plugging process pipe string comprises an outer pipe string, and a first inner pipe string, a second inner pipe string and a third inner pipe string which are arranged inside the outer pipe string in a sleeving manner and can be matched with the outer pipe string; the outerpipe string comprises a plurality of screen pipe combination bodies which are arranged in a production sleeve at intervals from top to bottom; the first inner pipe string comprises a solid plug; thesecond inner pipe string comprises an oil pipe and at least two hollow plugs which are arranged outside the oil pipe at an interval; the third inner pipe string comprises a sealing tie back sleeve, anoil pipe and a hollow plug which are arranged in sequence from top to bottom; a slip is arranged on the outside wall surface of each of the solid plug and the hollow plugs; and a sealing rubber layeris arranged on the outside wall surface of the sealing tie back sleeve. The screen pipe completion selective plugging process pipe string is simple in structure, low in cost, safe in construction andhigh in reliability; and precise selective plugging position is realized by matching the inner pipe strings with different plugging functions with the outer pipe string.

Description

technical field [0001] The invention relates to the technical field of screen tube completion, in particular to a selective plugging process string for screen tube completion. Background technique [0002] At present, in screen completion operations, due to complex conditions such as geological conditions and development benefits, reservoirs located in different layers in the same production well may no longer meet the development requirements due to different reasons. Therefore, according to production Demand requires selective mining of different horizons. Therefore, it is necessary to design a set of plugging process string with selective recovery function to provide conditions for the realization of selective plugging in screen completion. Contents of the invention [0003] The object of the present invention is to provide a screen completion selective plugging process string that can be used for the screen completion operation of selectively exploiting reservoirs in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08E21B33/127E21B33/129
CPCE21B33/127E21B33/129E21B43/086
Inventor 张立娜杨文领张恒陈世春王玥于学良张雅静赵鹏高志伟刘明
Owner CNPC BOHAI DRILLING ENG
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