Annular pressure spool

Details Annular pressure spool Annular pressure spool

2005-01-11

2005-01-11

Bagnell, David (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S084400, C166S088400

Reexamination Certificate

active

06840327

ABSTRACT:
A well bore pressure containment device is provided. Operating as a single stripping and containment device compatible with a wide range of tool string and tubing sizes, the containment device may be integrated with rotating pressure control systems, and be used during completion and work over operations. The containment device has a spool, and a flexible bladder extending about the interior of the spool. The bladder may be controllably deformed to seal against a tool string passing through the device using an inwardly directed pressure, which preferably is exerted by a fluid in the interstitial space between the spool and the bladder.

REFERENCES:
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patent: 2945665 (1960-07-01), Regan et al.
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patent: 3897040 (1975-07-01), Le Rouax
patent: 5588491 (1996-12-01), Brugman et al.
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patent: 6167959 (2001-01-01), Bassinger et al.
patent: 6615921 (2003-09-01), Whitelaw et al.
patent: 6702012 (2004-03-01), Bailey et al.

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