Oblique per-perforating device in three-dimensional original rock sample drill hole and pre-perforated hole machining method

A technology in cubes and boreholes, which is applied in the field of inclined pre-perforation devices in drill holes of cube raw rock samples, and can solve problems such as difficulties in making raw rock samples

Inactive Publication Date: 2019-08-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a kind of inclined pre-perforation device in the drilling hole of the cubic proto-rock sample to solve the deficiency of using simulated similar materials to make the sample in the multi-stage fracturing experiment in the prior art, so that the pre-perforation in the proto-rock Pre-perforation is carried out in sample drilling to solve the difficult problem of making original rock samples

Method used

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  • Oblique per-perforating device in three-dimensional original rock sample drill hole and pre-perforated hole machining method
  • Oblique per-perforating device in three-dimensional original rock sample drill hole and pre-perforated hole machining method
  • Oblique per-perforating device in three-dimensional original rock sample drill hole and pre-perforated hole machining method

Examples

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Effect test

Embodiment 1

[0046] Example 1, see figure 1 , figure 2 , image 3 , Figure 4 , a kind of inclined pre-perforation device in the drilling hole of a cube original rock sample, comprising a base platform 1, an air drill, a sample holder 8, an air pressure control device 7 and a position adjustment device; the air drill and the sample holder The devices 8 are all connected to the base platform 1 through a position adjustment device; the position adjustment device is composed of a lifting device 91, a longitudinal displacement device 92 and a sample displacement device 93: the vertical displacement device 92 can be lifted and lowered On the device 91, the vertical displacement device 92 forms a structure with an adjustable pitch angle through the first angle adjuster; the sample holder 8 is arranged on the sample displacement device 93, and the sample displacement device 93 is horizontal. It is arranged laterally on the base platform 1; the air drill is also connected with a pressure gas s...

Embodiment 2

[0052] Example 2, combined with figure 1 , figure 2 , image 3 , Figure 4 , a kind of inclined pre-perforation processing method in the borehole of a cubic protorock sample, implemented based on the device of embodiment 1, comprising the following steps:

[0053] The first step is to determine the perforation diameter and inclination angle of the oblique perforation in the through hole in the middle of the cube rough sample, and install the angle transmission device 3 corresponding to the inclination angle on the micro pneumatic motor 2 of the air drill, and take the same diameter The drill bit in the diamond tool 6, and the drill bit is fixed on the drill rod 5 by clamping;

[0054] In the second step, fix the prefabricated 300mm × 300mm × 300mm cubic protorock sample 11 with a through hole formed in the middle part on the sample holder 8 according to the vertical mode of the central through hole axis of the sample, and The position of the sample is roughly adjusted by ...

Embodiment 3

[0064] Embodiment 3, a kind of oblique pre-perforation processing method in the drilling hole of the cube proto-rock sample, the difference between this method and embodiment 2 is that the pre-perforation section trimming is carried out according to the following steps: S21 is the cubic proto-rock in the seventh step After the pre-perforation at different heights in any of the same phases in the upper middle of the sample 11 is completed, the drill bit is lifted above the cubic original rock sample, and the drill bit is replaced with a grinding head; S22 repeats the fifth and sixth steps The first step is to modify the shape of the pre-perforation sections at different heights in the same phase in sequence; S23 retreats the air drill and lifts it above the cubic original rock sample 11 to prepare for the next group of pre-perforation drillers. pieces.

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Abstract

The invention discloses an oblique pre-perforating device in a three-dimensional original rock sample drill hole and a pre-perforated hole machining method. The oblique hole pre-perforating device comprises a base platform, a pneumatic drill, a sample clamper, a pressure control device and a position adjusting device, wherein both the pneumatic drill and the sample clamper are arranged through theposition adjusting device; the position adjusting device consists of a lifting device, a longitudinal shifting device and a sample shifting device; the longitudinal shifting device has a structure ofwhich a lifting angle and a pitching angle can be adjusted; the sample clamper is arranged horizontally, transversely and movably; the pneumatic drill comprises a pneumatic device which is arranged movably and vertically; an output end of the pneumatic device is connected with a rotation angle transmission device of which an output end is constructed to a drilling rod; a diamond tool clamping shaft sleeve is arranged at a front end of the drill rod; the axis of the drill rod is parallel to the moving direction of the pneumatic drill; and the drill rod axis and the moving direction are coincided in the same plane. The machining method is implemented based on the pre-perforating device. The oblique pre-perforating device has the beneficial effects of simple structure, compact layout and convenience in perforation. The machining method s is reasonable in process, is convenient to operate, and has high efficiency.

Description

technical field [0001] The invention belongs to unconventional oil and gas exploitation simulation technology, in particular to an inclined pre-perforation device and a pre-perforation method in a cube original rock sample drilling hole. Background technique [0002] In unconventional oil and gas mining fracturing projects, such as shale oil and gas, coalbed methane, etc., field tests have developed from single well hydraulic fracturing, CO2 phase change fracturing, etc. to multi-well and multi-stage fracturing. When multi-stage fracturing is used in the fracturing mining site, it is often necessary to select perforation arrangements with different spacings and orientations to carry out field tests on the test section or engineering section. At this time, field tests often form multi-cluster fracturing fracture networks, and different perforation spacings lead to different fracture network cluster spacing. Therefore, it is very necessary to make fracturing simulation sample...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286G01N2001/2873
Inventor 吴明洋尹光志邓博知李铭辉张东明王维忠鲁俊刘超宋真龙赵宏刚刘淑敏马波
Owner CHONGQING UNIV
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