Water drainage and gas recovery device for coal seam gas and use method of water drainage and gas recovery device

A drainage gas extraction and coalbed methane technology, applied in the direction of mining fluid, earth drilling, wellbore/well components, etc., can solve the problems of high production energy consumption and high mining cost, and achieve reduced energy consumption, lower mining costs, and configuration simple effect

Active Publication Date: 2018-04-20
PETROCHINA CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long period of time in the middle and late stages of coalbed methane mining, the continuous operation of the oil well pump will inevitably lead to the problems of high production energy consumption and high mining costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water drainage and gas recovery device for coal seam gas and use method of water drainage and gas recovery device
  • Water drainage and gas recovery device for coal seam gas and use method of water drainage and gas recovery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0055]The invention provides a coalbed methane drainage and gas recovery device, such as figure 2 as shown, figure 2 It is a structural schematic diagram of a coalbed methane drainage and gas recovery device provided by an embodiment of the present invention, and the coalbed methane drainage and gas recovery device includes:

[0056] tubing 1;

[0057] The oil pump 2 connected to the lower end of the oil pipe 1 and sealed with the oil pipe 1, the oil well pump 2 includes a hollow rod 3 located inside the oil pipe 1 and a hollow polished rod 4 connected to the upper end of the hollo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a water drainage and gas recovery device for coal seam gas and a use method of the water drainage and gas recovery device and belongs to the technical field of coal seam gas exploitation. The water drainage and gas recovery device for the coal seam gas is additionally provided with a mechanical control switch, a switch on-off tool, a hollow polished rod packer and the likeon the basis of the prior art, the water drainage and gas recovery device for the coal seam gas can control on-off of the mechanical control switch on an oil pipe through lifting or lowering of a hollow polished rod. When the hollow polished rod is lifted, the switch on-off tool on the hollow polished rod can drive the mechanical control switch on the oil pipe to be turned on, thus a first annularspace can communicate with a second annular space, and through stratum energy of the coal seam gas, accumulated liquid in the second annular space enters the first annular space through the mechanical control switch, enters a hollow rod and the hollow polished rod through liquid passing holes in the hollow rod and is finally discharged into the ground water flowing course. According to the waterdrainage and gas recovery device for the coal seam gas and the use method of the water drainage and gas recovery device, the stratum energy can be sufficiently utilized to conduct water-carrying gas production, so that the exploitation cost is saved.

Description

technical field [0001] The invention relates to the technical field of coalbed methane exploitation, in particular to a coalbed methane drainage and gas recovery device and a method for using the same. Background technique [0002] Coalbed methane, also known as coalbed methane gas, is called coalbed gas in the coal industry. It is an unconventional natural gas formed during coal formation and stored in coalbeds. Most of this natural gas (70%-90%) exists in the coal matrix in the state of adsorption, a small amount exists in the coal cleats and other pores and fissures in the free state, and a small amount is dissolved in the coal seam water. The adsorption of coal makes the accumulation mechanism and development technology of coalbed methane completely different from that of conventional natural gas. [0003] In the prior art, the production of coalbed methane usually uses the rod pump of the pumping unit to drain the pressurized water in the coal reservoir, so that the pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12
CPCE21B43/121
Inventor 李志广李风涛闫永维单桂栋张子佳李川郭群甘宝安陈冬曾晓辉
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap