Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A fixation method for underground gas storage well bore

A fixing method and technology for gas storage wells, which are applied in the container discharge method, container filling method, gas/liquid distribution and storage, etc., can solve the problems of difficult construction, inability to fix, and accidents in the wellbore, and improve safety. performance and mission, the fixing process is simple, and the effect of coagulation is firm.

Inactive Publication Date: 2006-09-27
自贡力源科技有限公司
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of cementing quality, many gas storage wells are often scrapped before reaching the service life, and even wellbore stringing accidents occur
The traditional cementing method, one is to pour cement slurry between the wellbore and the well wall from top to bottom to fix it with the well wall. The gap between them is generally less than 3.0cm, and the cement slurry is difficult to reach the position below 10m, and the groundwater, drilling fluid and air between the wellbore and the well wall cannot be discharged; Underground Gas Storage Well Shaft Fixing Method" patent technology, sink a hose from one side of the wellbore, and grout from the bottom of the well; although this method overcomes the grouting from top to bottom, shallow depth, groundwater, drilling fluid and air Disadvantages that cannot be discharged, and the middle and lower parts of the wellbore cannot be fixed
However, the basic wells opened by geological drilling have poor verticality and uneven well walls, and the wellbore is rigid, so the grouting hose is easily crushed, so that the cement slurry cannot be poured down. The closed bottom is held up by the cylinder of the ball head, the construction is difficult, and the cement slurry is also difficult to pour from the bottom up to the ground, which affects the fixing effect
In addition, both of the above two traditional filling methods have a considerable part of the cylinder that cannot be covered by cement slurry, and the exposed pipe is also vulnerable to corrosion, which poses a safety hazard
Therefore, the above-mentioned background technology has the disadvantages of poor manufacturability and reliability of pouring cement slurry, and the wellbore is prone to up and down movement and rotation during use, especially when the ambient temperature changes greatly. Affect the normal use and service life, and pose a threat to the safety of equipment and staff

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
  • A fixation method for underground gas storage well bore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Take the fixing of a wellbore with an effective gas storage length of 125m when the outer diameter of the wellbore is 7 as an example:

[0013] A. Down the wellbore: first use the 7-hour conduit back pressure valve for drilling in oil and gas fields as a one-way valve 4, fasten it with the bottom of the wellbore 2 through the pipe taper thread, and weld the fixing frame 5 at the lower end of the valve body; then install the wellbore 2 It is placed in the foundation well 3 with a diameter of φ215.9mm (8 h) and a depth of 128m drilled according to the petroleum and geological drilling procedures and requirements, and a flange 1 is installed on the upper mouth of the wellbore; the fixed frame 5 adopts a 1.5m long At 7 o'clock, four holes of 1000×50mm are symmetrically opened and cross-welded to the bottom of the valve through two φ30mm steel bars;

[0014] B. Install the grouting device: the intubation pipe 10 adopts a 3-hour drill pipe. First, the 3-hour connecting sle...

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 relates to a method for fixing underground gas storage well cylinder, which comprises a well cylinder whose bottom has a one-way valve and a fixing bracket inside the basic well; a irrigating device for mounting insertion tube and modulating the cement via the cement pump, insertion tube, and one-way valve to fill cement into the cylinder and the well wall; then removing the irrigating device; and waiting the cement be solidified. The invention can avoid pollution on the inner chamber of well cylinder, to eliminate the washing process. And it can improve the safety and service life of well cylinder.

Description

technical field [0001] The invention belongs to a method for fixing shafts of fuel gas underground gas storage wells. In particular, it is a method for installing and fixing the shaft of a high-pressure natural gas underground gas storage well in a foundation well through cement slurry. Background technique [0002] At present, in CNG (compressed natural gas) supply stations and city gas peak-shaving stations, underground gas storage wells have been widely used to store high-pressure natural gas. However, due to the limitation of cementing quality, many gas storage wells are often scrapped before reaching the service life, and even wellbore stringing accidents occur. The traditional cementing method, one is to pour cement slurry between the wellbore and the well wall from top to bottom to fix it with the well wall. The gap between them is generally less than 3.0cm, and the cement slurry is difficult to reach the position below 10m, and the groundwater, drilling fluid and a...

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): F17C13/08
Inventor 冉训
Owner 自贡力源科技有限公司
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
Eureka Blog
Learn More
PatSnap group products