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Double-acting compression type setting mechanism

A compressive, double-acting technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve problems such as inability to effectively ensure reliable setting of packers

Inactive Publication Date: 2016-12-21
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the existing compression packer relies on a single setting method and cannot effectively ensure the reliable setting of the packer, the present invention proposes a double-acting compression type setting mechanism, including a packer, a packer The tail end is provided with an anchoring mechanism, and the feature is that: the upper part of the packer is also provided with a rubber cylinder, and the upper end of the rubber cylinder is provided with a hydraulic auxiliary setting mechanism

Method used

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  • Double-acting compression type setting mechanism

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Experimental program
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Effect test

Embodiment 1

[0022] In order to overcome the problem that the existing compression packer relies on a single setting method and cannot effectively ensure the reliable setting of the packer, this embodiment provides a method such as figure 1 The shown double-acting compression setting mechanism includes a packer, and an anchoring mechanism is provided at the tail end of the packer. Hydraulic auxiliary setting mechanism.

[0023] The anchoring mechanism is located at the tail end of the packer and is supported by one-way slips, which can be seated by lifting, lowering, rotating, etc. The hydraulic auxiliary setting mechanism is located at the upper end of the rubber tube, and firstly provides one-way slip support through the anchoring mechanism And apply a certain pressure on bit to realize the compression of the rubber barrel, that is, the packer is set, the oil pipe is pumped, and the hydraulic auxiliary setting mechanism is activated to provide a certain compression force to the rubber ba...

Embodiment 2

[0026] The hydraulic auxiliary setting mechanism includes an upper joint 1, a hydraulic cylinder 2 and a central pipe 4. The upper section of the hydraulic cylinder 2 is placed outside the lower part of the upper joint 1, and the upper part of the central pipe 4 is connected to the upper joint 1 and the lower section of the hydraulic cylinder 2. Inside, the outside of the lower part of the central tube 4 is also covered with a rubber tube 5 .

[0027] Since the inner diameter of the lower section of the hydraulic cylinder 2 is smaller than the inner diameter of the upper section of the hydraulic cylinder 2, the liquid enters the closed cavity outside the central tube, and the pressure of the liquid pushes the hydraulic cylinder 2 to move down to realize the setting seal.

[0028] The upper joint 1 and the central pipe 4 are threadedly connected, and the liquid cylinder 2 cooperates with the upper joint 1 and the central pipe 4 to form a closed cavity. When pumping, the liquid ...

Embodiment 3

[0030] Further, when setting seal is not required, an outer edge is provided on the outer side of the lower part of the upper joint 1, the upper end of the liquid cylinder 2 rests on the outer edge, and the lower end of the upper joint 1 is placed on the upper and lower side walls of the liquid cylinder 2 The inner edge of the inner edge, the liquid cylinder 2 is stuck between the upper joint 1 and the rubber tube 5, and will not slip.

[0031] Further, a sealing ring is provided between the upper joint 1 and the liquid cylinder 2 , and a sealing ring is provided between the liquid cylinder 2 and the central pipe 4 . When the liquid enters the sealed cavity from the liquid inlet channel 3, the sealing ring can prevent liquid loss, ensure hydraulic pressure, push the hydraulic cylinder 2 downward, and compress the rubber cylinder 5, so that the packer always maintains a set state.

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Abstract

The invention provides a double-acting compression type setting mechanism. The double-acting compression type setting mechanism comprises a packer; an anchoring mechanism is arranged at the tail end of the packer; a rubber cylinder is further arranged on the upper portion of the packer; and a hydraulic assistant setting mechanism body is arranged at the upper end of the rubber cylinder. According to the double-acting compression type setting mechanism, packer setting force is provided through a one-way slip; when the packer setting force is insufficient due to displacement of a tubular column and other conditions, the setting force is provided by the hydraulic assistant setting mechanism body arranged at one end of the rubber cylinder at the time, so that the packer is maintained in a setting state all the time; and the demand of reservoir reform is met, and also reliable setting of the packer in the multilayer-section construction process can be guaranteed doubly.

Description

technical field [0001] The invention relates to the technical field of oil and gas testing tools for oil and gas fields, in particular to a double-acting compression setting mechanism. Background technique [0002] The packer is an indispensable downhole tool for reservoir stimulation in low-permeability reservoirs. In recent years, in order to further increase the production of a single well and shorten the operation cycle, and to carry out more effective stimulation of the reservoir, vertical wells and horizontal wells have been developed. Research on fracturing tools. As the number of construction intervals and the complexity of the construction conditions of old wells continue to increase, there are high requirements for the stability of the packer setting performance. Currently used compression packers include mechanical setting and hydraulic setting. For mechanically set compression packers, one-way slips are generally used to support the setting. When slipping, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/126E21B33/128
CPCE21B33/1265E21B33/1285
Inventor 田文超张文邓小强隆世明廖作杰李星星徐孝山张海涛李铭罗江成韩玮
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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