Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent
1996-02-09
1997-07-15
Fox, John
Valves and valve actuation
Blow-out preventers
Radial reciprocating ram
137580, B21B 3306
Patent
active
056475721
ABSTRACT:
A lightweight blowout preventer having a low profile is disclosed. Each of the rams have a sealing ring to be positioned thereabout to seal leaks from occurring between its bonnet and the ram body, thereby permitting the use of only about four connecting bolts for each side of the bonnet to the body and torqued for ordinary holding. A hinge plate is provided to allow selection of the side of the body for two associated bonnets. The hinge plate also is a manifold for the passageways for the hydraulic fluid to the fluid hinges. The hinges each includes a telescopic balancing sub with only one side spring for applying balanced pressure with the applied closing or opening hydraulic fluid to the hinge regardless of whether opening or closing hydraulic pressure is applied. The hydraulic passageways in the bonnets are located between the guideway extensions and the outside surfaces of the bonnets. The hinge plate and the bonnets can be inverted so that they can be mounted on either of two sides of the body.
REFERENCES:
patent: 4253638 (1981-03-01), Troxell, Jr.
Fox John
Hydril Company
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