Downhole sand fracturing system of coal mine

A sand fracturing and coal mine technology, applied in mining equipment, wellbore/well parts, gas discharge, etc., can solve problems such as unfavorable gas release, easy closure of cracks, inconvenient post-drainage, etc., to improve work efficiency and reduce The effect of labor intensity and convenient transportation

Pending Publication Date: 2018-02-23
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP +1
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Problems solved by technology

[0002] At present, most coal and gas outburst mines in China use underground coal mine fracturing pumps to increase permeability and fracture coal and rock in coal mines, thereby reducing coal and gas outburst accidents, but there are deficiencies in the fracturing process , that is, the pump

Method used

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  • Downhole sand fracturing system of coal mine
  • Downhole sand fracturing system of coal mine

Examples

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Example Embodiment

[0017] Attached below figure 1 , 2 The present invention will be described in detail with specific embodiments.

[0018] An underground sand fracturing system for coal mines is composed of a fracturing pump module, a power module, an electric control module, a clean water pump module, and a sand mixing module; a plunger pump is arranged on the fracturing pump module, and the plunger pump The power input end is connected to the power output end of the hydraulic transmission through a coupling I; the power module is arranged with a hydraulic transmission and an explosion-proof motor, and the power input end of the hydraulic transmission and the main shaft of the explosion-proof motor pass through the coupling II Connection; the clean water pump module is arranged with a centrifugal pump I, a centrifugal pump II and a clean water tank, and the suction ports of the centrifugal pump I and the centrifugal pump II are respectively connected with the clean water tank through pipelines; sa...

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Abstract

An underground coal mine sand fracturing system, which is composed of a fracturing pump module, a power module, an electric control module, a clean water pump module, and a sand mixing module; a plunger pump is arranged on the fracturing pump module; a hydraulic pump is arranged on the power module. The transmission, explosion-proof motor, and the explosion-proof motor drive the plunger pump through the hydraulic transmission; the clean water pump module is equipped with centrifugal pump Ⅰ, centrifugal pump Ⅱ and clean water tank; the sand mixing module is equipped with sand-water mixing pump, agitator, and sand conveyor and the sand bucket, the output port of the sand-water mixing pump is connected with the input port of the plunger pump through the pipeline; the water outlet of the centrifugal pump II is connected with the input port of the plunger pump through the pipeline; the electric control module respectively controls the , centrifugal pump II, sand-water mixing pump, sand conveyor, explosion-proof motor, and agitator. The invention is composed of mutually independent module units, which is convenient to move and transport, improves the working efficiency of fracturing, and reduces labor intensity.

Description

technical field [0001] The invention belongs to the technical field of underground coal mine fracturing, and in particular relates to an underground coal mine sand-filling fracturing system. Background technique [0002] At present, most coal and gas outburst mines in China use underground coal mine fracturing pumps to increase permeability and fracture coal and rock in coal mines, thereby reducing coal and gas outburst accidents, but there are deficiencies in the fracturing process , that is, the pump unit uses clean water to perform fracturing during the fracturing process. After the fracturing is completed, the cracks generated by the fracturing are easy to close, which is not conducive to the release of gas along the cracks, affects the fracturing effect, and is inconvenient for later drainage. [0003] In order to implement the fracturing process of various coal and gas outburst mines, it is required to implement anti-permeability fracturing on rock mass and coal mass, ...

Claims

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Application Information

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IPC IPC(8): E21B43/267E21F7/00
CPCE21B43/267E21F7/00
Inventor 唐春玲李彦喜郑宏乾李志亮谭国政
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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