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Down-hole packer system

A packer and body technology, which is applied in the field of downhole packer systems, can solve the problems of low tensile capacity in the middle fracturing section of packer compressive strength, and achieve the effects of improving compressive strength and compressive strength.

Active Publication Date: 2017-08-18
孙东生
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Problems solved by technology

[0003] The purpose of the present invention is to provide a downhole packer system for in-situ hydraulic fracturing stress testing of boreholes, so as to solve the low compressive strength of the packer and the low tensile capacity of the intermediate fracturing section in the prior art technical issues

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Embodiment 1

[0034] Such as Figure 1-5 As shown, the packer system provided in this embodiment includes an upper packer body 10, an intermediate fracturing section 20 and a lower packer body 30;

[0035] The upper end of the upper packer body 10 and the lower end of the lower packer body 30 are respectively set as sliding ends 11, and the intermediate fracturing section 20 is fixedly connected with the upper packer body 10 and the lower packer body 30 respectively , the high-pressure water circuit is arranged inside the upper packer body 10 , the middle fracturing section 20 and the lower packer body 30 .

[0036]In the packer system provided by the embodiment of the present invention, the upper and lower ends of the upper packer body 10 and the lower packer body 20 are respectively set as sliding ends 11, and the middle fracturing section 20 is connected to the upper packer body respectively. 10 is fixedly connected with the lower packer body 30. With this design, the middle fracturing ...

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Abstract

The invention provides a down-hole packer system used for stress testing of a drilling in-situ water pressure fracturing position. The down-hole packer system comprises an upper packer body, a middle fracturing section and a lower packer body. The upper end of the upper packer body and the lower end of the lower packer body are arranged to be sliding ends correspondingly, the middle fracturing section is fixedly connected with the upper packer body and the lower packer body correspondingly, and high-pressure water routes are arranged in the upper packer body, the middle fracturing section and the lower packer body. By adoption of design of the down-hole packer system, the pressure-resisting capacity of a packer is increased, the high-pressure water routes are arranged in the upper packer body, the middle fracturing section and the lower packer body, the external diameter of the middle fracturing section is increased, and the middle fracturing section, the upper packer and the lower packer are connected into a whole; and after expansion of the upper packer and the lower packer is reduced, high-pressure water acts on areas of the lower end of the upper packer and the upper end of the lower packer, pulling stress acted on the middle fracturing section is reduced during fracturing operation, and system pressure-resisting strength is improved.

Description

technical field [0001] The invention relates to the technical field of drilling hydraulic fracturing ground stress measurement, in particular to an underground packer system. Background technique [0002] At present, in the stress measurement of drilling hydraulic fracturing, as the test depth increases, the overall pressure resistance of the downhole packer system needs to be continuously improved to meet the pressure requirements of deep hole hydraulic fracturing stress testing. In the existing hydraulic fracturing ground stress testing system, the downhole span packers are mostly fixed at the ends and connected by steel pipes. As the fluid pressure in the middle fracturing section rises, the shear deformation of the packer increases, and the tensile force acting on the middle fracturing section increases. The spacer system cannot meet the strength requirements of the deep hole hydraulic fracturing stress test process, which reduces the reliability and test efficiency of ...

Claims

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Application Information

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IPC IPC(8): E21B33/124
Inventor 孙东生陈群策李全金铭
Owner 孙东生
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