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Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires

A choke and natural gas technology, applied in wellbore/well parts, production fluid, earthwork drilling and production, etc., can solve the problems of long operation period, complicated operation procedures, high fishing cost, etc., and meet the convenience of on-site operation and technical requirements Low, accurate and reliable delivery effect

Active Publication Date: 2010-11-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the shortcomings of the current movable downhole choke in the fishing process, such as complex operation procedures, long operation period and high fishing cost

Method used

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  • Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires
  • Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires
  • Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires

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Embodiment 1

[0035] Embodiment 1: Taking a method of fishing a downhole choke without steel wire in a natural gas well as an example, the present invention will be further described in detail.

[0036] Taking a gas well whose inner diameter is 40 millimeters and the downhole restrictor 31 is lowered into a depth of 2000 meters as an example, the present invention will be further described in detail.

[0037] The method of fishing the downhole choke without steel wire in the natural gas well:

[0038] A. Downhole gas production string: First, connect the outer working barrel 17 of the downhole choke to the tubing 34 through the tubing joint 27, then lower the outer working barrel 17 of the downhole choke to the design depth of the downhole along with the tubing string, and set the wellhead , install the wellhead device 32, and close the oil pipe valve of the wellhead device 32.

[0039] refer to Figure 4 . The delivery string is composed of a capture thrower 30 , a downhole choke 31 , a...

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PUM

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Abstract

The invention relates to a method for throwing and fishing out an underground restrictor from a gas well without utilizing steel wires, which is applied to gas production in the gas well. The method comprises the following steps: before throwing, placing an underground restrictor working barrel into a position of projected depth in the gas well; then installing a throwing and fishing catcher and an underground restrictor core, throwing the underground restrictor core, enabling the underground restrictor core to enter into the underground restrictor working barrel and be automatically locked and finishing throwing the underground restrictor core; and in the process of fishing, installing the throwing and fishing catcher and a fisher and fishing out the underground restrictor core. The lifting force of natural gas flow is utilized to lift the fisher and the underground restrictor core to the ground together. The invention has the effects that the on-site operation of the underground restrictor can be more convenient under the premise of not reducing the use effect of the underground restrictor; and compared with the process of throwing and fishing out the underground restrictor by utilizing a well testing truck, the method of the invention has the advantages of simple throwing and fishing process and simple and convenient on-site operation, not only can accurately and reliably throw the underground restrictor but also save throwing and fishing time and reduce throwing and fishing expenses.

Description

technical field [0001] The invention relates to the technical field of natural gas exploitation in oilfields, in particular to a method for exploiting a natural gas well using a downhole choke and the downhole choke. Background technique [0002] In recent years, in the production process of natural gas wells, more and more downhole choke technology is used to prevent the production of wellbore hydrates in the process of gas well production. After field application and continuous improvement of technicians, downhole choke Technology has been continuously refined and improved. At present, the most commonly used downhole choke in field application is a movable downhole choke suitable for 2-7 / 8″ tubing. This kind of movable downhole choke can be set at the design depth according to the design requirements, and the steel wire rope is used to Fishing. Such as the Chinese patent announcement number: CN2732993Y, "A new gas well downhole choke". It is composed of a downhole locking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B31/18E21B23/01
Inventor 段宝玉郝丽
Owner PETROCHINA CO LTD
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