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Wellbore Shut Off Valve with Hydraulic Actuator System

Inactive Publication Date: 2010-12-02
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the well remains live while, for example, a pump is being removed from the production tubing assembly, pressurized fluid can be forced to the surface very quickly, resulting in a dangerous situation at the wellhead and possibly reducing the ability of the well to produce further.

Method used

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  • Wellbore Shut Off Valve with Hydraulic Actuator System
  • Wellbore Shut Off Valve with Hydraulic Actuator System
  • Wellbore Shut Off Valve with Hydraulic Actuator System

Examples

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Embodiment Construction

[0019]Referring first to FIGS. 1 and 2, there is depicted an exemplary wellbore 10 which has been drilled into the earth 12 and is lined with casing 14 which will extend upwardly toward the surface of the wellbore 10. The casing 14 defines a central flowbore 16. The wellbore 10 contains an exemplary production string assembly which will be used to illustrate the invention. It is noted that, in this example, the section of the wellbore 10 which is depicted is representative of an upper pump-assisted completion within the wellbore 10 and that one or more additional completions may be located below the wellbore portion that is shown. As a result, a lower portion of production tubing string 18 is shown extending downwardly within the flowbore 16 from lower packer 20. A landing anchor 22 extends axially upwardly from the packer 20. Collectively, the lower production tubing string portion 18 and elements suspended below it, as well as the packer 20 and anchor 22 may be thought of as a low...

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Abstract

A wellbore shut-off valve is operably associated with a valve actuator so that the shut-off valve can be selectively moved between open and closed conditions when desired rather than opening and closing occurring automatically as portions of the production assembly are removed or replaced in the wellbore.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention generally relates to systems and methods for isolating or closing off a wellbore or a portion of a wellbore.[0003]2. Description of the Related Art[0004]During operation of a hydrocarbon production well, it is sometimes necessary to shut off the well or a portion of the wellbore below a particular point. If the well remains live while, for example, a pump is being removed from the production tubing assembly, pressurized fluid can be forced to the surface very quickly, resulting in a dangerous situation at the wellhead and possibly reducing the ability of the well to produce further. Another example of equal importance would involve controlling fluid losses to the formation which could permanently damage the formation. To shut-off the wellbore, a shut-off valve, or barrier valve, can be included in the production tubing assembly.SUMMARY OF THE INVENTION[0005]The present invention provides a wellbore...

Claims

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Application Information

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IPC IPC(8): E21B34/06
CPCE21B2034/002E21B34/14E21B2200/04
Inventor ANDREWS, THAD D.MYERLEY, THOMAS SCOTTDESAI, MONA I.FARQUHAR, MARTIN NEILHAYNES, ANDREWCOULL, CRAIGCONSTANTINE, JESSE J.
Owner BAKER HUGHES INC
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