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

Concentric double-pipe hoisting jack

A vertical drive and casing string technology, applied in earthwork drilling, wellbore/well components, logic circuits, etc., can solve problems such as difficult installation and complicated devices

Inactive Publication Date: 2007-01-10
SUNSTONE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the '941 patent is limited in that it discloses an apparatus so complex that its method or apparatus for vertically driving a string of tubing to operate a downhole tool is difficult to install in the field

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
  • Concentric double-pipe hoisting jack
  • Concentric double-pipe hoisting jack
  • Concentric double-pipe hoisting jack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] As shown in FIG. 1 , the CCJ 100 includes an upper housing 102 , a lower housing 104 , and a piston assembly 125 . The upper casing 102 has a top flange 106 for detachable coupling with a cross member for connection between blowout preventers, such as cross member 12 (see FIG. 8 ) for connection between blowout preventers. Bolts 130 (not shown) pass through the top flange bolt holes 108 and nuts (not shown) are used to secure the top flange 106 to the spool member 12 for inter-BOP connections. By passing the bolts 130 through the main flange bolt holes 112 of the upper casing and the main flange bolt holes 116 of the lower casing and fixing the bolts with nuts 132, the main flange 110 of the upper casing is connected to the lower casing. The main flange 114 is engaged, and the upper housing 102 is connected to the lower housing 104 . The main seal 154 is installed between the main flange 110 of the upper housing and the main flange 114 of the lower housing to prevent f...

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

A concentric casing jack is disclosed having a casing supporter and actuator that uses hydraulic fluid to vertically raise and lower an inner concentric string of casing in a well. This casing jack is connected to a string of casing and can operate down-hole tools attached to the lower end of the casing by actuating the casing. The piston is equipped with external seals to hold hydraulic pressure between the hollow piston and the body of the jack. The lower shaft of the piston extends through the base of the casing jack housing where the lower shaft is threaded onto the concentric string of casing in the well bore. The upper shaft of the hollow piston extends above the top of the casing jack housing where it connects to the surface drilling equipment. The casing jack is equipped with two hydraulically retractable supports that fit into the recessed area of the hollow piston and support the weight of the casing and piston after the piston is in its raised position.

Description

technical field [0001] The invention relates to an oil field tool and assembly. More particularly, the present invention relates to an apparatus and method for supporting and driving concentric strings of casing during drilling operations Background technique [0002] When drilling oil, gas or water wells, it is often advantageous to employ a second casing, tubing or drill string within the production casing. Typically, an inner concentric casing string is supported on the ground and a drill string is inserted inside the inner casing string. The drill string can then run independently of the inner casing string. Furthermore, it is generally desirable to be able to drive the inner sleeve vertically so that a tool mounted on the lower end of the inner sleeve can be operated. The device that supports the inner string of casing on the ground and is able to drive the inner string of casing along its axis is known as a casing jack. [0003] The prior art often addresses the pr...

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): E21B23/08H03K19/094
CPCH03K19/09429
Inventor 威廉·詹姆斯·休斯马克·爱德华·邓巴
Owner SUNSTONE
Features
  • Generate Ideas
  • 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