U-shaped well system and drilling method thereof

A U-shaped, drilling technology, used in directional drilling, wellbore/well components, earth-moving drilling, etc., can solve the problems of limited control area and difficulty in increasing the discharge and production volume, etc., to expand the contact area and achieve good discharge and production effect. , the effect of improving the discharge volume

Inactive Publication Date: 2015-12-09
CHINA SHENHUA ENERGY CO LTD +1
View PDF11 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a U-shaped well system and its drilling method to solve the problems in the prior art that the control area of ​​coalbed methane drainage is limited and the drainage volume is difficult to improve

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
  • U-shaped well system and drilling method thereof
  • U-shaped well system and drilling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Such as figure 1 As shown, the U-shape well system in this embodiment is used for extracting coalbed methane from a single layer of coal in a coal mine. The U-shaped well system includes a vertical well 10 and a horizontal well 20 . Wherein, the horizontal well 20 has a vertical well section 21 , a horizontal well section 22 and a transition well section 23 connected between the vertical well section 21 and the horizontal well section 22 . The end of the horizontal well section 22 away from the transition well section 23 communicates with the vertical well 10 . Horizontal well 20 also includes two deviated lateral intervals 24 . One end of the above-mentioned inclined branch well sec...

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 provides a U-shaped well system and a drilling method thereof. The U-shaped well system comprises a straight well (10) and a horizontal well (20). The horizontal well (20) comprises a vertical well section (21), a horizontal well section (22) and a transition well section (23) connected between the vertical well section (21) and the horizontal well section (22). The end, away from the transition well section (23), of the horizontal well section (22) is communicated with the straight well (10). The horizontal well (20) further comprises an inclined branch well section (24), and one end of the inclined branch well section (24) is connected to the horizontal well section (22). According to the technical scheme, the problems that in the prior art, the control area of coalbed methane extraction is limited, and the extraction amount can be hardly improved can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of coal bed gas extraction, in particular to a U-shaped well system and a drilling method thereof. Background technique [0002] At present, when extracting coalbed methane from two layers of coal in coal mines, the commonly used method of connecting the ground and the underground is: the far-end U-shaped butt joint connection well (vertical well and horizontal well connection), in which the horizontal section is not fracture. Since the horizontal section is not fractured, the drainage is greatly restricted by the natural conditions of the coal seam, the control area of ​​the drainage is limited, and it is difficult to increase the drainage. Contents of the invention [0003] The main purpose of the present invention is to provide a U-shaped well system and its drilling method, so as to solve the problems in the prior art that the control area of ​​coalbed methane drainage is limited and the drainage volu...

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): E21B43/30E21B7/04
Inventor 崔春兰向军文刘福义李明建安世刚白枫桐
Owner CHINA SHENHUA ENERGY 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