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An infinite pressure hydraulic expansion casing outer packer assembly

An inflatable, packer technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of long time, high technical level requirements, high processing cost, and avoid uncertainty. , The effect of reduced technical level requirements and short time-consuming

Active Publication Date: 2017-12-29
DAQING HAOYUN RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The valve system structure of the outer casing packer currently used in the field is complicated, and the valve system is installed horizontally, that is, the axial direction of the valve is perpendicular to the axial direction of the outer casing packer, so it is difficult to manufacture and consumes a lot of energy. Long time, high processing cost
In addition, the welding process must be used in the manufacturing process of this valve system, which not only requires a high level of craftsmanship, but also limits the overall pressure bearing capacity of the valve system.

Method used

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  • An infinite pressure hydraulic expansion casing outer packer assembly
  • An infinite pressure hydraulic expansion casing outer packer assembly

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] This embodiment includes a connection unit, an expansion unit and a control unit. The connection unit is mainly composed of an upper connecting pipe 1, a valve body 6, an intermediate connecting pipe 16, a joint 18 and a lower connecting pipe 19 which are sequentially connected by threads to form a sealing A rigid connection structure at the center of the spacer.

[0021] The expansion unit is sleeved on the outside of the intermediate connecting pipe 16. The expansion unit includes an expansion tube guard ring 13, an expansion tube expansion ring 14, an expansion tube assembly and an expansion tube connection ring 17. The expansion tube assembly consists of two expansion tubes Joint 12 and expansion cylinder 15 are formed, and the two ends of expansion cylinder 15 are vulcanized on two expansion cylinder joints 12. The expansion cylinder joint 12 close to the valve...

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Abstract

The invention belongs to the field of oil field downhole tools and particularly relates to a pressure-limit-free hydraulic expansion type external casing packer assembly.The pressure-limit-free hydraulic expansion type external casing packer assembly comprises a connecting unit, an expansion unit and a control unit, wherein the control unit mainly comprises an opening valve, a closing valve and a one-way valve, two through holes are formed in a valve body, the axes of the through holes are parallel with the axis of a middle connecting pipe, the annular space between the middle connecting pipe and the expansion unit is communicated with the outside of the external casing packer assembly through the two through holes, the opening valve and the closing valve are mounted in one through hole, the one-way valve is mounted in the other through hole, and a liquid filling pin is mounted on the inner side of the valve body in a threaded manner.The pressure-limit-free hydraulic expansion type external casing packer assembly has the advantages the axes of the valves of a valve system are parallel with the axis of the packer, machining can be achieved through the conventional machining technology, time consumption is reduced, and the technical level requirements of workers is lowered greatly.

Description

technical field [0001] The invention belongs to the technical field of oil field downhole tools, and in particular relates to an infinite pressure hydraulic expansion casing outer packer assembly. Background technique [0002] The outer casing packer is a cementing or completion tool used in oil and gas wells in the petroleum industry. It is an important means to prevent or control the interpenetration of oil, gas, and water by mechanical means. It is mainly composed of expansion cylinders, intermediate connecting pipes and When going downhole, it is connected to the appropriate position of the casing string, and the expansion cylinder is expanded by the increase of the hydraulic pressure in the casing to achieve the purpose of controlling the outer annulus of the casing. The valve system structure of the outer casing packer currently used in the field is complicated, and the valve system is installed horizontally, that is, the axial direction of the valve is perpendicular t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/126E21B34/08
CPCE21B33/126E21B34/08
Inventor 汤文俊
Owner DAQING HAOYUN RUBBER PROD
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