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Gas well separate layer fracturing and producing integrated well completing pipe string and technique

A technology for layered fracturing and well completion strings, which is applied in the direction of production fluid, wellbore/well components, drill pipe, etc., which can solve the problems of reservoir damage, complicated construction, high construction cost, etc., and achieve fast liquid drainage, The effect of small tubing volume

Inactive Publication Date: 2006-03-29
西安益友石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned conventional fracturing method requires two perforations, multiple tripping of the pipe string, and multiple use of fracturing equipment. The construction is complicated, the cycle is long, the construction cost is high, and the well killing damages the reservoir seriously.

Method used

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  • Gas well separate layer fracturing and producing integrated well completing pipe string and technique

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Embodiment Construction

[0017] As shown in the figure, 1-casing, 2-pipe string telescopic compensator, 3-well cleaning switch, 4-safety joint, 5-upper washable well packer, 6-sand blasting sliding sleeve, 7-hydraulic anchor , 8-down washable packer, 9-tubing, 10-ball seat.

[0018] The present invention starts from the idea of ​​running a set of operation strings into the well to complete layered fracturing and combined layer exploitation. Device 2, tubing 9, well flushing switch 3, safety joint 4, upper flushable packer 5 (with hydraulic anchor 7), sandblasting sliding sleeve 6, lower flushable packer 8 (with hydraulic anchor 7) , oil pipe 9, ball seat 10, etc. are combined from top to bottom, and the conventional pipe string telescopic compensator 2 is used to push the piston upward by hydraulic pressure to cut the shear nails during construction, release the elastic connection limit, and the pipe string telescopic compensator is in the pipe Under the action of string tension, the inner and outer ...

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Abstract

The present invention adopts separate layer fracturing layers-combined exploitation integrated well completion pipe string made up by combining oil pipe, pipe string extending compensator, well-flushing switch, safety connector, upper well-washable packer with hydraulic anchor, sandblasting sliding sleeve, lower well-washable packer with hydraulic anchor and ballseat from top to bottom, and adopts hydraulic setting upstrain unplugging working mode, and has repeated setting function so as to implement one-step perforation, two-layer fracturing and combined exploitation technical requirements under the condition of non-moving pipe string.

Description

technical field [0001] The invention belongs to the technical field of downhole operation tools and well completion technology used in the production process of natural gas well completion, in particular, it relates to an integrated well completion pipe string and technology for partial pressure and combined production in well completion production. Background technique [0002] Fracturing is an indispensable means to improve the productivity of gas wells and realize high and stable production of gas fields. Aiming at the fracturing of the two-stage gas layer that requires separate fracturing, the specific operation steps of using conventional bridge plug downhole tools to perform layered fracturing on the two-stage gas layer are as follows: (1) perforating the lower gas layer; 2) Lower the fracturing string to fracturing the lower gas layer; (3) Drain and test the lower gas layer; (4) Kill the well and pull out the fracturing string; (5) Lower the bridge plug, seal and pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B17/00E21B43/26E21B33/10
Inventor 付钢旦徐勇桂捷赵粉霞王效明
Owner 西安益友石油科技有限公司
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