Apparatus and methods for utilizing a downhole deployment valve

Details Apparatus and methods for utilizing a downhole deployment valve Apparatus and methods for utilizing a downhole deployment valve

2007-02-20

2007-02-20

Thompson, Kenneth (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S316000, C166S319000, C166S332800, C166S375000

Reexamination Certificate

active

10783982

ABSTRACT:
Methods and apparatus for utilizing a downhole deployment valve (DDV) to isolate a pressure in a portion of a bore are disclosed. Any combination of fail safe features may be used with or incorporated into the DDV such as redundant valve members, an upward opening flapper valve or a metering flapper below a sealing valve. In one aspect, a barrier or diverter located in the bore above a valve member of the DDV permits passage through the bore when the valve member is open and actuates when the valve member is closed. Once actuated, the barrier or diverter either stops or diverts any dropped objects prior to the dropped object reaching and potentially damaging the valve member. In another aspect, the tool string tripped in above the DDV includes an acceleration actuated brake that anchors the tool string to a surrounding tubular if the tool string is dropped.

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Nimir Field In Oman Proves The Downhole Deployment Valve A Vital Technological key To Success, Weatherford International Ltd., (online) 2003. Available at http://www.weatherford.com/weatherford/groups/public/documents/general/wft004337.pdf.

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