A slip-type downhole isolation and throttling comprehensive descaling device

Abstract

The invention relates to a slip type integrated descaling device with the downhole packing and throttling functions. The slip type integrated descaling device comprises a releasing head, a center rod, an upper slip, a mandrel, a lower slip, a dowel, an upper rubber sleeve, a lower rubber sleeve, a thrust sleeve, a nozzle, a check valve, a spring, an adjusting lever and a scale inhibiting and anti-scaling device. The slip type integrated descaling device is characterized in that the mandrel is connected below the releasing head, the center rod is installed in the mandrel, the nozzle and the check valve are sequentially installed below the center rod and the mandrel, the spring and the adjusting rod are sequentially installed on the lower portion of the check valve, the upper slip and the lower slip are installed on the upper portion and the lower portion outside the mandrel respectively, the upper rubber sleeve, the lower rubber sleeve and the thrust sleeve are sequentially installed on and connected with the lower portion of the mandrel, and the lowest portion of the device is connected with an alloy material fixing sheath. A packer, a throttler and a descaling device are combined into one, therefore, the working difficulty is effectively reduced when downhole installation is conducted, the maintenance rate of the device is reduced, and exploitation can be normally conducted.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas extraction, in particular to an downhole descaling device, which is a comprehensive descaling device with the functions of downhole isolation and throttling, and mainly solves the problem that the downhole scaling of oil (gas) wells affects the normal operation of oil and gas. production problems. Background technique [0002] At present, in the exploitation of natural gas, in order to remove scale, reduce pressure, throttle, and limit production, packers, restrictors, and scale removers are often installed underground. The difficulty of the work has increased, and at the same time, once a certain equipment has a problem or fixed failure, it will bring difficulties to maintenance and salvage, and even lead to downhole accidents. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and p...

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Problems solved by technology

[0002] At present, in the exploitation of natural gas, in order to remove scale, reduce pressure, throttle, and limit production, packers, restrictors, and scale removers are often installed underground. The difficulty of the work is increased. At the same time, once a certain equipment has a problem or fixed failure, it will bring difficulties to maintenance and salvage, and even lead to underground accidents.

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