Flexible plastic quick grouting hole sealing device and method

A sealing device and a flexible and plastic technology, which is applied to the valve device of wellbore/well, earth-moving drilling, sealing/isolation, etc. The device design is flexible to change, overcomes repeated pipe connections, and simplifies the effect of the intubation process

Active Publication Date: 2017-02-15
CHINA UNIV OF MINING & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used rubber expansion hole sealer is mainly used in gas-containing coal seam extraction, hydraulic fracturing and other processes. It is easy to operate, but the cost is high, and it is difficult to apply to the high-pressure water injection environment and the surrounding rock rupture conditions of the hole wall; For the grout solidification type hole sealing method, the traditional process is complicated, the bottom of the sealing section is difficult to seal, and the multi-section pipe connection and orientation of the grouting pipe are difficult to apply to the deep hole fast sealing operation conditions; for the traditional viscoplastic Due to the reason of passive hole sealing, it is difficult to meet the sealing requirements for the coal rock control process that requires pressure-bearing liquid sealing in the hole

Method used

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  • Flexible plastic quick grouting hole sealing device and method
  • Flexible plastic quick grouting hole sealing device and method
  • Flexible plastic quick grouting hole sealing device and method

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Embodiment Construction

[0036] Taking the pressure relief and sealing operation of water-filled pressure blasting in coal seam drilling as an example, the present invention will be further described in conjunction with the accompanying drawings:

[0037] Such as Figure 1-7 As shown, it is assumed that the depth of the coal seam pre-blasting pressure relief borehole 1 is 25m, and the diameter of the borehole 1 is 100mm. In view of the high utilization rate of explosive explosion energy under the condition of water-filled pressure blasting in coal and rock holes, the possibility of punching holes by the sealing material is relatively high, so the length of the drilling sealing section 2 is designed to be 15m. Select the flexible plastic resin pipe as the grouting pipe 3, cut a section every 18m, and carry out the seaming operation according to the designed pipe seam 4 parameters. After the slotting is completed, the processed flexible plastic grouting pipe is coiled and brought downhole.

[0038] In...

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Abstract

The invention discloses a flexible plastic quick grouting hole sealing device and method. The device is mainly composed of an umbrella buckle type plugging device, a slotting flexible plastic grouting pipeline and a double-cone pipe connector device. The initial grout pressure in pipes is positively stored in a sealed mode through the differential flow of grout fed into and discharged out of the grouting pipes, and the processes of automatic pushing out, spreading and plugging of a convex angle umbrella buckle are completed. A flexible plastic pipe capable of being coiled is adopted to be inserted into a drill hole at a time, and the primary quick hole sealing operation requirement is met. According to the flexible plastic quick grouting hole sealing device and method, the process of traditional hole sealing operation is simplified, operation is convenient and quick, the cost is low, and the device and the method are novel hole sealing device and method which have wide application and popularization value.

Description

technical field [0001] The invention discloses a flexible plastic fast grouting sealing device and method, which is mainly used for the sealing operation of coal and rock drilling, for the static pressure (hydraulic fracturing) and dynamic pressure ( Hydraulic pulsation, hydraulic jet) cracking, anti-reflection, pressure relief, and blasting in coal and rock drilling (common charge blasting, liquid-filled pressure blasting, etc.) have good hole sealing effects. Background technique [0002] The pre-cracking control of the hard roof of the coal seam, the high stress relief transfer and dynamic load prevention and control of the coal seam in the deep mine, the efficient drainage of the gas-containing coal seam, etc. are all the main technical problems faced by the safe and efficient mining of modern mines in my country. Under the condition of hard and difficult roof, the influence on the safety production of coal mine is more prominent. Aiming at such outstanding problems in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B34/06E21B17/02E21B33/136
CPCE21B17/02E21B33/13E21B33/136E21B34/06
Inventor 杨敬轩刘长友
Owner CHINA UNIV OF MINING & TECH
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