Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for governing annulus pressure of gas wells

A technology of annular pressure and annular pressure, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of leakage point aggravating annular pressure, complex operation, troublesome operation, etc., to improve safety production guarantee level, prevent corrosion, and reduce treatment costs

Active Publication Date: 2017-05-31
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the serious annular pressure problem caused by the leakage of the pipe string, the production pipe string can only be pulled out to find out the leakage path and replace with a new production pipe string
For the above methods, the former requires regular monitoring and release, and the operation is troublesome. At the same time, there is a possibility that the leak point will aggravate the pressure of the annular space due to erosion due to repeated pressure release flow.
The latter needs to shut down the well and stop production, which is complex and costly

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
  • Method for governing annulus pressure of gas wells
  • Method for governing annulus pressure of gas wells
  • Method for governing annulus pressure of gas wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] The invention provides a method for controlling gas well annulus with pressure (such as figure 1 , figure 2 As shown, in the natural gas well, the gas well annulus 3 is formed between the production string 1 and the casing string 2, the production string 1 is set with a packer 4, and the gas well annulus 3 above the packer 4 is the original Annulus protection fluid 5, set the depth of the liquid surface of the original annulus protection fluid 5 as z l A casing head gate valve 31 is arranged at the wellhead of the gas well, and the casing head gate valve 31 is arranged in communication with the annulus of the gas well, and the gas well annulus 3 can be depressurized through the casing head gate valve 31 . When a leak po...

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 method for governing annulus pressure of gas wells. The method is to supplement and inject a gas well annulus of a gas well with annulus pressure with supplemental annulus protecting fluid with density greater than the produced gas through the ground, which can prevent the produced gas in a producing pipe column of the gas well from leaking into the gas well annulus, and reduce the gas well annulus pressure of the gas well with the annulus pressure. The method can eliminate pressure in the gas well annulus without the gas well stopping production, keep the gas well stable in a long term, and improve the safety of natural gas well production operation.

Description

technical field [0001] The invention relates to the technical field of production safety control and management of natural gas wells, in particular to a method for controlling pressure in the annulus of gas wells. Background technique [0002] After the completion of the natural gas well, according to the structural characteristics of the well body, the production string, the A annular space, the B annular space, and the C annular space are sequenced from the inside to the outside. The space inside the production pipe string is the flow channel for natural gas production, and the production pipe string is an important safety barrier to ensure the safe flow of high-pressure natural gas to the ground. With the increase of the development time of the gas field, a series of damages such as corrosion and perforation of the production pipe string, failure of the seal of the packer, and leakage of the screw thread will occur in the production string, and then the high-pressure natu...

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
IPC IPC(8): E21B41/00
CPCE21B41/00
Inventor 樊建春张喜明温东刘迪胡治斌吕宁贻梁政伟赵坤鹏高富民
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com