Underground throttler

Abstract

The invention relates to the technical field of a throttle, and in particular to an underground throttle. The underground throttle comprises a sand preventing cover, a rubber sleeve pipe, a sealing push sleeve, an air nozzle shear pin, a lower rubber cylinder base, a rubber cylinder main body, an upper rubber cylinder base, a conical cap, a delivering cap, a release pin, and a delivering joint; the sealing push sleeve is sleeved at the inside of the upper part of the sand preventing cover, and an installing slot is arranged in the middle part of the bottom end of the sealing push sleeve; the installing slot is internally and fixedly equipped with an air nozzle blocking assembly through the air nozzle shear pin; the upper part of the sealing push sleeve is extended out of the sand preventing cover, and the outside of the middle part is sleeved with the rubber sleeve pipe; the outside of the rubber sleeve pipe is orderly sleeved with the lower rubber cylinder base, the rubber cylinder main body, the upper rubber cylinder base and the conical cap from bottom to top; the outside of a lifting sleeve cylinder is orderly sleeved with a slips supporting sleeve, an annular conical body and a slips main body from inside to outside; the slips main body and the slips supporting sleeve corresponding to the upper part of the annular conical body are limited and mounted. The underground throttle is reasonable and compact in structure, convenient to use, reliable in sealing; for the underground throttle does not need to fish and cannot influence the performance of other underground works, the underground throttle is featured by safe, labor-saving, simple and high-efficient.

Description

technical field [0001] The invention relates to the technical field of chokes, and relates to a downhole choke. Background technique [0002] The downhole throttling technology is to place a certain size throttle in the tubing at a certain depth downhole to realize throttling and pressure reduction in the wellbore, convert pressure energy into kinetic energy, increase fluid flow velocity, and keep the throttled fluid at critical flow. state, reduce the impact of wellhead pressure fluctuations on the bottom of the well, and make full use of geothermal energy to prevent the formation of hydrate. Through downhole gas nozzle throttling, the pressure of natural gas above the gas nozzle is reduced, the conditions for hydrate formation are destroyed, and the purpose of preventing hydrate formation is achieved. Downhole chokes are divided into slip type downhole chokes and preset downhole chokes according to different sealing methods. Because there is a gas nozzle in the choke, wh...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a downhole choke, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problems that the existing downhole choke affects subsequent operations in the well during its existence, is easy to be stuck, and is difficult to salvage.

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