Method of sealing pressure within a blowout preventer and a...

Details Method of sealing pressure within a blowout preventer and a... Method of sealing pressure within a blowout preventer and a...

2005-04-12

2005-04-12

Look, Edward K. (Department: 3751)

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

Reexamination Certificate

active

06877712

ABSTRACT:
A blowout preventer which has ram chambers with an upper sealing surface and a lower sealing surface. Upper sealing elements, lower sealing elements and intermediate sealing elements are mounted to the sealing face of each of the rams. The upper sealing elements engage the upper sealing surface. The lower sealing elements engage the lower sealing surface. The intermediate sealing elements are positioned between the upper sealing elements and the lower sealing elements. When the rams are in the sealing position and pressure is exerted from below the rams, sealing engagement between the intermediate sealing elements, the upper sealing elements and the upper sealing surface contain such pressure from below. When the rams are in the sealing position and pressure is exerted from above the rams, sealing engagement between the intermediate sealing elements, the lower sealing elements and the lower sealing surface contains such pressure from above.

REFERENCES:
patent: 5180137 (1993-01-01), Carlson et al.
patent: 5294088 (1994-03-01), McWhorter et al.
patent: 5713581 (1998-02-01), Carlson et al.
“Pressure Control Packages for Coiled Tubing Services,” Texas Oil Tools, <http://www.tot.com/products/bops.htm> [retrieved Apr. 15, 2003].
“Ram Blowout Preventers for Every Application,” NL Industries, Inc., pp. 6150-6156.
“Varco Drilling Equipment,” Varco®, <http://www.varco.com/products/VDE/VDE.htm> [retrieved Apr. 15, 2003].

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