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

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...

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