Pumping device for PE (polyethylene) screen pipe well completion of coal-bed gas horizontal well and pumping method

A technology of screen tube completion and pumping device, applied in the direction of drill pipe, casing, drilling equipment, etc., can solve the problems of blocked flow channel, a large amount of pulverized coal, falling, etc., and achieve the effect of avoiding jamming accidents.

Active Publication Date: 2014-10-15
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The brittleness of coal rock is strong, and it is easy to produce a large amount of pulverized coal and coal lumps to fall during the mining process. In severe cases, the flow channel will be blocked and the production of coalbed methane wells will be reduced.

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
  • Pumping device for PE (polyethylene) screen pipe well completion of coal-bed gas horizontal well and pumping method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 as shown,

[0029] A pumping device for PE screen pipe completion of coalbed methane horizontal well; the upper end of the main body is a pressure bearing surface 1, the middle part of the pressure bearing surface 1 has a guide hole 2, and a threaded connection part 4 is provided in the guide hole 2; the lower end of the main body is The hemispherical guide head 3; the discharge hole 4 is connected to the guide hole 2, the other end of the discharge hole 4 is the middle part of the hemispherical guide head 3, and the connecting part between the discharge hole 4 and the guide hole 2 is an inclined plane 5.

[0030] After the coal seam collapses in the layer where the pumping device is located, the liquid (gas) flow can flow through the guide hole 2 from the upper guide mechanism and enter the discharge hole 4, and then flow out from the discharge hole 4.

[0031] According to the conditions of the drilling tools at the well site, the drilling t...

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 pumping device for PE (polyethylene) screen pipe well completion of a coal-bed gas horizontal well and a pumping method, and belongs to the technical field of coal-bed gas. The upper end of a body is a pressure bearing surface; a guide hole is formed in the middle part of the pressure bearing surface; a threaded connection part is arranged in the guide hole; the lower end of the body is a hemisphere guide head; a drainage hole is connected with the guide hole; the other end of the drainage hole is arranged on the middle part of the hemisphere guide head; a part, which is connected with the guide hole, of the drainage hole is a slope. The pumping device has the effects that enough impact force can be generated, and a screen pipe is successfully driven to move downwards to reach a target layer; a proper clearance is reserved between the outer rim of the pumping device and a drill rod, so that the phenomenon that the moving direction of the screen pipe is deflected or the screen pipe is blocked due to a fact that impurity particles in drilling fluid are clamped in the clearance is effectively avoided; in the process of driving the screen pipe to move downwards, the screen pipe can be successfully driven to pass through a joint of the drill rod and a bent section of a borehole, so that a clamping accident is avoided.

Description

technical field [0001] The invention relates to a pumping device and a pumping method for PE screen tube completion of a coalbed gas horizontal well, belonging to the technical field of coalbed gas. Background technique [0002] Coalbed methane is a gas that exists in coal rocks, and its composition is mainly methane, commonly known as gas. Coalbed methane is an important unconventional resource. my country is rich in coalbed methane resources, with proven geological reserves of about 36.8 trillion cubic meters. [0003] Most of the middle and high-rank coal seams in my country have the characteristics of low pressure and low permeability, so U-shaped horizontal wells or horizontal multi-branch wells, which can greatly increase the drainage area, should be used for CBM development. The brittleness of coal rock is strong, and it is easy to produce a large amount of pulverized coal and coal lumps to fall during the mining process. In severe cases, the flow channel will be blo...

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): E21B19/14
Inventor 申瑞臣乔磊时文田中兰王子健付利王开龙林盛杰何爱国张喜伟
Owner BC P INC CHINA NAT PETROLEUM CORP
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