Separating type underground throttler capable of being set for multiple times

Abstract

The invention discloses a separated downhole throttler capable of being set repeatedly, which comprises a throttler shell and a plug packer, the throttler shell comprises an inner sleeve, the upper end of the inner sleeve is in threaded connection with a positioning sleeve, and the positioning sleeve is sequentially sleeved with a push pipe, a rubber sleeve mounting sleeve and an outer sleeve from bottom to top; the top end of the rubber sleeve installation sleeve is in threaded connection with the bottom end of the outer sleeve, the rubber sleeve installation sleeve is slidably sleeved with a rubber sleeve, the rubber sleeve installation sleeve is sleeved with the upper end of the push pipe, the top of the positioning sleeve is connected with a center sleeve, the outer sleeve is fixedly connected with the bottom of the center sleeve through threads, and a driving motor is arranged between the outer sleeve and the center sleeve. The driving motor is rotationally connected with a rotating shaft, the rotating shaft penetrates through the positioning sleeve, the lower end of the rotating shaft is rotationally connected with the pushing pipe through threads, the rotating shaft drives the pushing pipe to move up and down, and a plug sealing device is arranged in the positioning sleeve. Setting can be repeated for multiple times, setting sealing is reliable, the setting depth of the flow controller is adjustable, and fishing is convenient.

Description

technical field [0001] The invention relates to the technical field of gas production from oil and natural gas reservoirs, in particular to a separate downhole choke that can be seated multiple times. Background technique [0002] The downhole choke is a kind of downhole choke and pressure reduction device used to prevent the production of natural gas hydrate due to high pressure and low temperature conditions in the process of underground gas collection and then block the wellhead device. The use of downhole choke not only improves production efficiency, but also reduces the operating pressure of surface equipment and reduces production costs. [0003] At present, downhole chokes can be divided into slip-type downhole chokes and preset downhole chokes according to different seating methods. The slip type downhole choke is seated at any position in the production string by means of differential pulling, and the sealing function of the rubber cylinder is realized by pulling ...

AI Technical Summary

Problems solved by technology

However, both the slip-type downhole choke and the pre-set downhole choke mentioned above have the disadvantage of not being able to be repeatedly seated. Therefore, a kind of downhole choke that can be set and sealed many times in the downhole is developed to adjust the running depth of the downhole choke. The new downhole choke is very important

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