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Water drainage device and double-pipe hydrofracturing in-situ stress measurement system

A measurement system and in-situ stress technology, applied in the field of fracturing, can solve problems such as the inability to realize the pressure operation of high-pressure hoses

Active Publication Date: 2019-06-21
INST OF GEOMECHANICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a water release device and a double-pipe hydraulic fracturing stress measurement system to solve the problem in the prior art that the high-pressure rubber hose cannot be pressed down by the water release device because the high-pressure rubber hose belongs to a flexible pipeline. technical issues

Method used

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  • Water drainage device and double-pipe hydrofracturing in-situ stress measurement system

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Embodiment 1

[0031] see Figure 1 to Figure 4 As shown, the present invention provides a drainage device, which includes a puller, a valve core rod 102 and a valve body 103; the valve body 103 is provided with a valve core chamber, and the valve body 103 is also provided with The first water outlet hole 104 and the second water outlet hole 105; one end of the valve core rod 102 is communicated with a first pipe joint 108, and the other end of the valve core rod 102 is provided with a third water outlet hole 107 communicated with the first pipe joint 108 , and the other end of the valve core rod 102 is inserted into the valve core cavity; an elastic member is arranged between the valve core rod 102 and the valve body 103, and the pulling member is fixedly connected with the valve core rod 102 for pulling the valve core rod 102 to make it move along the The axial movement of itself makes the third water outlet hole 107 communicate with the first water outlet hole 104 or connects the third wa...

Embodiment 2

[0045] The present invention provides a double-pipe hydraulic fracturing ground stress measurement system, which includes the drainage device in the first embodiment.

[0046] see Figure 5 As shown, in this embodiment, the double-pipe hydraulic fracturing stress measurement system further includes a packer 125 , and the first water outlet hole 104 communicates with the packer 125 .

[0047] When in use, the valve body 103 of the drainage device is bound on the drill pipe 127, and the drill pipe 127 does not play the role of drilling, and it does not rotate. The other end of the rope structure is bound to a winch 128 located outside the borehole. The second high-pressure rubber hose 117 communicates with the packer 125, while the first high-pressure rubber hose 116 communicates with the setting pump 126 located outside the borehole. In the hydraulic fracturing double-pipe ground stress measurement test, the drainage device is located near the natural groundwater level. Ther...

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Abstract

The invention relates to the technical field of fracturing, in particular to a water drainage device and a double-pipe hydrofracturing in-situ stress measurement system. The water drainage device comprises a pulling part, a valve core rod and a valve body, the valve body is provided with a valve core cavity and is further provided with a first water outlet hole and a second water outlet hole whichare communicated with the valve core cavity, one end of the valve core rod is communicated with a first pipe joint, the other end of the valve core rod is provided with a third water outlet hole communicated with the first pipe joint, the other end of the valve core rod is inserted into the valve core cavity, an elastic part is arranged between the valve core rod and the valve body, and the pulling part is fixedly connected to the valve core rod and is used for pulling the valve core rod to enable the valve core rod to move in the axial direction of the valve core rod so as to enable the third water outlet hole to be communicated with the first water outlet hole or enable the third water outlet hole to be communicated with the second water outlet hole. The double-pipe hydrofracturing in-situ stress measurement system comprises the water drainage device. According to the water drainage device and the double-pipe hydrofracturing in-situ stress measurement system, the water drainage is facilitated.

Description

technical field [0001] The invention relates to the technical field of fracturing, in particular to a drainage device and a double-pipe hydraulic fracturing ground stress measurement system. Background technique [0002] The double-pipe double-pipe hydraulic fracturing ground stress measurement system uses high-pressure rubber hose to set the downhole packer, and uses drill pipe to seal the high-pressure pipeline to fracturing the isolated section. This design is only suitable for the natural state of the above two waterways The case where the water level difference is relatively small, that is, the case where the natural water level in the borehole is relatively shallow. When the natural water level in the borehole is deep, there is a large water level difference between the high-pressure rubber hose and the drill pipe. This water level difference acts on the downhole packer, preventing the packer from deforming and retracting, making subsequent tests impossible. , In seve...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B49/00E21B47/06
Inventor 吴满路孙林
Owner INST OF GEOMECHANICS
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