Hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device and method

A gas recovery and hydraulic technology, applied in the direction of production fluid, earth square drilling, non-volume pump, etc., can solve problems such as eccentric wear of the pumping drive rod and casing, unsuitable for drainage, etc.

Active Publication Date: 2017-03-22
中矿瑞杰(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, coalbed methane wells mostly use secondary wells and horizontal wells. If conventional rod pump technology is used, it will cause eccentric wear of the pumping drive rod and casing in the build-up section, and the equipment needs frequent maintenance. Therefore, conventional rod drainage equipment It is not suitable for the drainage of coalbed methane wells with kick-off section

Method used

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  • Hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device and method
  • Hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device and method
  • Hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device and method

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Experimental program
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Effect test

Embodiment 1

[0082] In a preferred embodiment of the present invention, the hydraulic throwing-and-fishing-type sand-discharging and pulverized-coal gas extraction device includes the following devices:

[0083] 1. Ground installation

[0084] As the power of the whole device, the ground device is the key to ensure the smooth operation of the whole device. The composition of the ground device described in this embodiment is as follows: figure 1 As shown, including the following structure:

[0085] 1.1 Sedimentation tank 1

[0086] The settling tank 1 is a step-by-step settling tank, which is a device for returning liquid to deposit coal powder and sand particles. There are multiple internal partitions 111 in the tank, and multiple partition tanks are formed in the tank. The upper part of the sedimentation tank 1 is provided with an overflow port 112, and the tank body is provided with a fluid outlet at the last stage of the separator tank; a fluid inlet is provided at the middle of the ...

Embodiment 2

[0136] In another preferred embodiment of the present invention, the throwing-and-fishing type sand discharge and pulverized coal gas recovery device is similar to that of Embodiment 1, the only difference is that the mixed liquid pipe 15 is not set outside the power liquid pipe 16, but It is arranged side by side with the power fluid pipe 16.

[0137] The mixed liquid pipe 15 communicates with the outlet of the mixed liquid flow channel of the positive circulation reverse jet jet pump, and the power liquid pipe 16 communicates with the power liquid flow channel of the forward cycle reverse jet jet pump.

Embodiment 3

[0139] In another preferred embodiment of the present invention, the throwing-and-fishing type sand-discharging and pulverized-coal gas extraction device is similar to Embodiment 1, the only difference is that the high-pressure pipeline 6 is connected to a single well, and no branch pipeline is provided; the high-pressure pipeline Only the flowmeter 8 is installed on the 6, and the remote pressure gauge 5 is not installed. The automatic control device is directly connected with the flowmeter 8, and directly controls the power fluid flow to achieve the purpose of automatic control.

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Abstract

The invention relates to a hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device and a method. The gas production device comprises a ground device, a connecting device and a pit bottom device which are communicated in turn, wherein the ground device comprises a depositing tank, a ground pipeline, a liquid returning pipe and a gas production pipe; a liquid inlet and a liquid outlet are formed in a tank body of the depositing tank; the ground pipeline and the liquid returning pipe are respectively communicated with the liquid outlet and the liquid inlet; the gas production pipe is communicated with a well head device; the connecting device comprises the well head device, and a power liquid pipe and a mixing liquid pipe overlapped on the well head device; the pit bottom device comprises a positive-circulating reverse-jetting jet pump which is communicated with both of the power liquid pipe and the mixing liquid pipe; a ground power liquid pipeline and the liquid returning pipe are respectively communicated with the power liquid pipe and the mixing liquid pipe by the well head device; the mixing liquid pipe is sleeved on the exterior of the power liquid pipe. In order to solve the problem of the single-platform multi-well coal-bed gas well at present, the invention provides the hydraulic throwing-in and pulling type sand-draining coal dust-draining gas production device which can realize pumping set in parallel connection, can share the power liquid pipe, the gas-liquid separator and the depositing tank, can reduce the cost and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of drilling and coal-bed methane exploitation, mainly to the field of coal-bed methane collection equipment, and in particular to a hydraulic throwing-and-fishing sand-discharging and pulverized-coal gas extraction device and method. Background technique [0002] Coal bed methane is a kind of companion in the process of coal generation, and it is a high-quality clean energy with high value. With the increasing emphasis on environmental protection, the mining of coal bed methane has attracted more and more attention. In my country, coal bed methane Gas has been included as an important carrier to promote the revolution of energy production and consumption. [0003] The mining of coalbed methane has been in our country for a long time, and the mining method of coalbed methane transplanted from the oil mining method has its own development law. With the accumulation and progress of technology, CBM wells are gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B21/01E21B43/34F04F5/04F04F5/44
CPCE21B21/01E21B43/006E21B43/124E21B43/34F04F5/04F04F5/44
Inventor 刘升贵李家斌
Owner 中矿瑞杰(北京)科技有限公司
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