Dual purpose blow out preventer

Details Dual purpose blow out preventer Dual purpose blow out preventer

2006-11-20

2008-08-12

Dang, Hoang (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S077200, C166S085400, C251S001100

Reexamination Certificate

active

07410003

ABSTRACT:
An improved dual purpose blow out preventer (“BOP”) that provides both deployment and wellhead pressure containment functions. The dual purpose BOP may include four sets of rams including a set of seal/slip rams that provide bi-directional sealing being a first barrier to downhole pressure. The seal/slip rams may also grip a portion of a bottom hole assembly and create the bottom seal of an annular chamber. The BOP may include a set of seal rams that create the top seal of the annular chamber. The annular chamber may be pressurized through a port in the BOP, which may actuate a coiled tubing connector. The BOP may include a set of locate rams used to position a coiled tubing connector within the BOP stack. The BOP may also include a set of blind/shear rams that provide bi-directional sealing being a second barrier to wellhead pressure.

REFERENCES:
patent: 4940095 (1990-07-01), Newman
patent: 5014781 (1991-05-01), Smith
patent: 6321846 (2001-11-01), Rytlewski
patent: 6834721 (2004-12-01), Suro
patent: 6843463 (2005-01-01), McWhorter et al.
patent: 2003/0132004 (2003-07-01), Suro
patent: 2004/0251022 (2004-12-01), Smith
patent: 2005/0274527 (2005-12-01), Misselbrook et al.

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