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

Expansion liner hanger with hydraulic double drop mechanism

A technology of liner hanger and hands-off mechanism, which is applied in wellbore/well parts, earthwork drilling and production, etc. It can solve problems such as insufficient expansion force and safety risks, and achieve convenience in downhole operations, saving man-hours, sealing and sand prevention good sex effect

Active Publication Date: 2018-04-10
XINJIANG YONGSHENG ENERGY CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Even so, there are still some deficiencies in the existing expandable liner hangers, 1, the expansion force is insufficient; 2, there is a pressure-suppressed sealing problem; 3, the expansion method adopts a bottom-up mode, and there is a safety risk

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
  • Expansion liner hanger with hydraulic double drop mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A hydraulic double drop-hand mechanism expansion liner hanger, such as figure 1 As shown, it includes the expansion base pipe 13, the expansion cone 3, and the hydraulic cylinder 15 that are sequentially fitted on the inner pipe string 21. The overall structure of the expansion cone 3 has been disclosed in another utility model patent ZL201320724659.2 of the applicant. , which will not be repeated here. The top of the expansion cone 3 is provided with a ball socket 2 and a ball head 1 assembly set on the inner pipe string 21. The upper end of the ball head 1 is connected with the lower end of the hydraulic cylinder 15 through threads. A liquid injection hole is arranged on the top surface of the upper end liquid cylinder, and the upper variable button joint 14 is connected to the upper end of the inner pipe string.

[0014] The lower end of the expansion base pipe 13 below the expansion cone 3 is connected with the collet 8, and the collet 7 is set inside the collet 8,...

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 hydraulic expandable liner hanger provided with a double-safety releasing gadget. The hydraulic expandable liner hanger comprises an expansion base tube, an expansion cone and two hydraulic cylinders, wherein the expansion base tube, the expansion cone and the hydraulic cylinders are mounted on an inner tubing string in a sleeving manner sequentially; a ball socket and a ball assembly re arranged in the top end of the expansion cone, and the upper end of a ball is connected with the lower end of one hydraulic cylinder; a liquid injection hole is formed in the top surface of the hydraulic cylinder at the upper end; the upper end of the inner tubing string is connected with an upper adaptor connector; the lower end of the expansion base tube is connected with a releasing coupling; a collet is mounted in the releasing coupling in a sleeving manner, a releasing body is connected into the upper part of the collet, and the lower end of the inner tubing string is connected into the upper part of the releasing body; an outer slide bushing and an inner slide bushing are mounted inside and outside the inner tubing string respectively in a matched and sleeving manner; a pressure relief hole is formed in one side wall of each of the inner slide bushing, the outer slide bushing and the inner tubing string; a conical pin seat is connected into the lower end of the releasing body; a core tube is arranged in the conical pin seat and the releasing body in a matched manner, the upper end of the core tube is propped against the lower end of the inner slide bushing, and the lower part of the core tube is integrally connected with the conical pin seat through a shear pin; a thrust disc is arranged in the lower end of the collet and connected with the lower end of the core tube.

Description

technical field [0001] The invention relates to an expansion liner hanger with a hydraulic double drop mechanism. Background technique [0002] The expandable liner hanger expands the hanger body made of expandable tubing outwards through hydraulic or mechanical force, so that it forms a firm anchor connection with the casing of the upper level, so as to realize the suspension of the liner. The appearance and development of the expandable liner hanger is a great progress of the liner hanger technology, which has shown a strong development momentum and has attracted the attention and attention of the petroleum engineering field. [0003] At present, there are many kinds of domestic expansion liner hangers, each with its own characteristics, but they all use the principle of expansion. The expansion liner hanger of Shengli Oilfield Drilling Institute adopts the bottom-up expansion mode, which can move the pipe string up and down and rotate the whole pipe string during the pip...

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): E21B23/01
CPCE21B23/01
Inventor 肖润国徐旭董琪李兵张振前蓝栋林孙磊张强裴坤甘磊赖刚骆红瑛徐子清李良魏庆侠
Owner XINJIANG YONGSHENG ENERGY CO LTD
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