Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Welded injection-production casing and installation method for underground salt cavern gas storage

An installation method and welding technology, which is applied in the direction of casing, welding equipment, welding equipment, etc., can solve problems such as unsatisfactory, loose threaded connections, and affecting the air tightness of the wellbore, so as to reduce gushing, reduce costs, and reduce corrosion Effect

Active Publication Date: 2020-10-02
CHINASALT JINTAN
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the threaded connection is used for the injection-production string, it will easily lead to loosening of the threaded connection, which will become a leak point and affect the air tightness of the wellbore. Moreover, the economic cost of the air-tight thread used is also high, so the threaded connection string is no longer available. Meet the requirements of underground salt cavern gas storage

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
  • Welded injection-production casing and installation method for underground salt cavern gas storage
  • Welded injection-production casing and installation method for underground salt cavern gas storage
  • Welded injection-production casing and installation method for underground salt cavern gas storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The salt deposits in the Jintan area were developed at the end of the deposition of the Funing Formation in the Zhixiqiao Sag, and belonged to limited salt lake deposits in the shrinking stage of the lake basin, with a salt-bearing area of ​​60.5 km 2 . The area where the underground salt cavern gas storage is located is moderately buried, with a top depth of 808.6m to 1098.95m. The salt layer is well developed, with a thickness of 143m to 173m, and the distribution is stable. At present, there are 17 wells for the salt cavern underground gas storage in this block , the entire block plans to build 71 salt cavern underground gas storage.

[0034] The following describes the present invention in detail in conjunction with specific examples, but does not limit the scope of the present invention.

[0035] Taking Well WL01 of a salt cavern gas storage in the Jintan Salt Basin as an example to illustrate the application of welded casing in the salt cavern gas storage, and se...

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

PropertyMeasurementUnit
angleaaaaaaaaaa
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a welded-type injection-production sleeve for an underground salt cavern gas storage. The welded-type injection-production sleeve is constituted by welding a plurality of sleeve sets. The sleeve sets are each constituted by welding A-type sleeves, B-type sleeves and hanging rings, and the hanging rings are welded to the outer sides of the A-type sleeves. The invention further provides a mounting method of the welded-type injection-production sleeve for the underground salt cavern gas storage. The mounting method comprises the following steps of sleeve placement, preparation before welding, ground welding and ground weld seam quality detecting, hanging ring welding, sleeve set hoisting, wellhead welding and wellhead weld seam quality detecting, and putting-in of thesleeve sets. According to the characteristics of the actual working condition of the salt cavern gas storage, the reasonable sleeve mounting parameters and sequence are determined, and accordingly the gastightness of the injection-production sleeve during long-term operation of the gas storage is ensured; gastightness is verified through the shaft injection-production sleeve and gastightness detecting of the salt cavern, operation is easy, practicability is high, and the cost can be reduced effectively; and the gastightness of the shaft injection-production sleeve during long-term operation of the slat cavern gas storage is ensured, and safe operation of the gas storage is guaranteed.

Description

technical field [0001] The invention relates to an underground salt cavern gas storage welded injection-production casing and an installation method. Background technique [0002] As a new type of gas storage, underground salt cavern gas storage has been emerging in China in the past 10 years and has great development prospects. Compared with ground gas storage, it has very obvious advantages: underground salt cavern gas storage has a small footprint, low maintenance cost, large inventory, and high safety factor. The underground salt cavern gas storage is composed of surface wellhead equipment, wellbore and underground salt cavern. On the basis of determining the general situation of the salt rock, the salt rock layer is entered by drilling, and the cavity is built by leaching with clear water, and finally the underground salt cave is formed. The injection and production string is lowered on the basis of the brine mining well to form a natural gas injection and production ...

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 Patents(China)
IPC IPC(8): E21B17/00E21B19/14E21B19/08B23K31/02B23K37/00
CPCB23K31/02B23K37/00E21B17/00E21B19/08E21B19/14
Inventor 管国兴任晓云马旭强徐孜俊赵云松
Owner CHINASALT JINTAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com