Underground throttler

A choke and rubber cylinder technology, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of easy to be stuck and salvage, difficulty, affecting the operation in the well, etc., and achieve reasonable structure and reliable sealing. , easy to use effect

Pending Publication Date: 2017-12-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 p

Method used

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  • Underground throttler
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Embodiment Construction

[0015] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0016] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of front, back, up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.

[0017] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0018] as attached figure 1 , 2 As shown, the downhole choke includes a sand control cover 1, a rubber sleeve casing 2, a sealing push sleeve 3, a gas nozzle shear nail 4, a lower rubber sleeve seat 5, a rubber sleeve body 6, an upper rubber sleeve seat 7, and a cone cap 8. The delivery ...

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Abstract

The invention relates to the technical field of chokes, and is an downhole choke, which includes a sand-proof cover, a rubber sleeve casing, a sealing push sleeve, a gas nozzle shear nail, a lower rubber sleeve seat, a rubber sleeve body, an upper rubber sleeve seat, Cone cap, delivery cap, throwing pin and delivery joint, the inner side of the upper part of the sand control cover is equipped with a sealing push sleeve, and the middle part of the bottom of the sealing push sleeve is provided with an installation groove, and the air nozzle is fixed in the installation groove by the air nozzle shear nail Plugging assembly; the upper part of the sealing push sleeve protrudes out of the sand control cover, the outer middle part is equipped with a rubber sleeve sleeve, and the outer side of the rubber sleeve sleeve is sequentially equipped with a lower rubber sleeve seat, a rubber sleeve body, an upper rubber sleeve seat and a cone. The body cap and the outer side of the lifting sleeve are sequentially fitted with a slip support sleeve, an annular cone and a slip body from the inside to the outside, corresponding to the limit installation of the slip body and the slip support sleeve above the annular cone. The invention has a reasonable and compact structure, is convenient to use, has reliable sealing, does not need to be salvaged, does not affect other downhole operations, and has the characteristics of safety, labor saving, simplicity and high efficiency.

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...

Claims

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Application Information

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IPC IPC(8): E21B43/12E21B23/01
CPCE21B43/12E21B23/01
Inventor 李晓军段文广罗顺邓毅叶安臣
Owner BC P INC CHINA NAT PETROLEUM CORP
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