Hydraulically operated valves

Patent · Tue Apr 15 04:00:00 EST 1986

OSTI ID:5516883

Jones, M R

A blowout preventer is described which consists of a housing having a bore therethrough and chambers which intersect the bore, rams reciprocable within the chambers between bore opening and closing positions, means connecting the bore of the housing beneath the closed rams with the chambers behind the closed rams so that fluid in the bore urges the rams closed, passageways in the rams connecting the chambers behind the closed rams with the bore of the housing above the closed rams, and means for reciprocating the rams between opened and closed positions, including a cylinder within the housing outwardly of each ram chamber therein, a piston reciprocable within the cylinder, a rod on the piston extending sealably through a wall of the housing separating the ram chamber from the cylinder. Means by which control fluid may be admitted to or exhausted from the cylinder are on opposite sides of the piston in order to selectively move the rod toward or away from the ram in the chamber, means providing a lost motion connection between the inner end of each rod and the ram so as to move the ram to closed position as the rod is moved inwardly and to move the ram to open position as the rod is moved outwardly. The inner end of each rod has means for closing the connection of the passageway with the outer end of each ram as it is moved inwardly and for opening the connection of the passageway therewith as it is moved outwardly, another rod on each piston extending sealably through a wall of the housing separating the cylinder from an outer chamber in the housing, and a hole extending through the piston and both of the rods to connect the outer chamber with the ram chamber when the passageway connection is open and connect the outer chamber with the bore above the closed rams when the passageway connection is closed.

• Assignee: Koomey Blowout Preventers, Inc., Houston, TX
• Patent Number(s): US 4582293
• OSTI ID: 5516883
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BLOWOUT PREVENTERS
CONTROL EQUIPMENT
CYLINDERS
DESIGN
EQUIPMENT
FLOW REGULATORS
FLUIDS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
NATURAL GAS WELLS
OIL WELLS
PISTONS
VALVES
WELLS
WORKING FLUIDS