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Linkage type hydraulic layer changing switch and linkage type layer changing method

A linkage type, hydraulic technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve problems such as pipe string failure, and achieve the effect of improving the success rate and reliability.

Pending Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing hydraulic layer change switch realizes the repeated cycle switch of a certain oil layer, but one oil layer must correspond to one switch, and it needs to be activated at the same time when changing layers. column will fail

Method used

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  • Linkage type hydraulic layer changing switch and linkage type layer changing method
  • Linkage type hydraulic layer changing switch and linkage type layer changing method
  • Linkage type hydraulic layer changing switch and linkage type layer changing method

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0030] The linked hydraulic layer change switch includes a track reversing mechanism, a piston mechanism, and a housing 7. The piston mechanism includes a cylinder liner 5, a piston, and a one-way valve. The cylinder liner 5 is provided with an axially through cylinder liner center hole 16, The axially penetrating eccentric axial channel 17 and the radially penetrating low...

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Abstract

The invention discloses a linkage type hydraulic layer changing switch and a linkage type layer changing method. The linkage type hydraulic layer changing switch comprises a rail direction changing mechanism, a piston mechanism and a case, wherein the piston mechanism comprises a cylinder sleeve, a piston and a one-way valve; the cylinder sleeve is provided with an axially through cylinder sleevecenter hole, an axially through eccentric axial passage and a radially through cylinder sleeve lower radial hole; the cylinder sleeve lower radial hole communicates with the cylinder sleeve center hole; meanwhile, the cylinder sleeve lower radial hole does not communicate with the eccentric axial passage; the piston slides in the cylinder sleeve center hole in a sealed way; the piston comprises apiston upper cavity and a piston lower cavity; a blocking section is arranged between the piston upper cavity and the piston lower cavity; an upper end opening of the piston upper cavity is connectedwith the one-way valve; an upper cavity radial hole is formed in the piston upper cavity; the lower end of the cylinder sleeve is in threaded connection with the rail direction changing mechanism; anda lower end opening of the piston lower cavity and the upper end of a direction changing rail body of the rail direction changing mechanism are connected into an integral structure. Linkage layer changing of an upper layer and a lower layer is realized, and the requirement of layered immovable string layer changing mining in oil and gas field development is met.

Description

technical field [0001] The invention relates to the technical field of layer-changing mining in oil fields, in particular to a linked hydraulic layer-changing switch and a linked layer-changing method. Background technique [0002] At present, the existing hydraulic layer change switch realizes the repeated cycle switch of a certain oil layer, but one oil layer must correspond to one switch, and it needs to be activated at the same time when changing layers. The column will fail. Therefore, it is necessary to develop a linked hydraulic layer change switch, use a packer string to separate the two layers, and control the linked hydraulic switch to open the upper layer flow channel while closing the lower layer, and open the lower layer flow channel while closing the upper layer , realize the linkage of the upper and lower layers, improve the success rate of layer change, and ensure the reliability of the switch changeover; at the same time, reduce the use of a hydraulic switc...

Claims

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Application Information

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IPC IPC(8): E21B43/14E21B34/10
CPCE21B43/14E21B34/10
Inventor 王增林张雷智勤功古光明孟永李淑芳戴超祁辛华费秀英闫文文
Owner CHINA PETROLEUM & CHEM CORP
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