Pneumatic well casing pressure regulating system

Patent · Tue Oct 20 00:00:00 EDT 1987

OSTI ID:5998625

Flohr, M C

A pneumatic well casing pressure regulating system is described comprising: a hydraulically actuated choke for relieving well casing pressure; a continually running source of pneumatic pressure pulses; first means for applying pulses of hydraulic fluid corresponding to the pneumatic pressure pulses to the choke for opening the choke one step for each pulse of hydraulic fluid when actual casing pressure is higher than a desired casing pressure; and second means for applying pulses of hydraulic fluid corresponding to the pneumatic pressure pulses to the choke for closing the choke one step for each pulse of hydraulic fluid when actual casing pressure is less than a desired casing pressure.

• Assignee: Smith International, Inc., Newport Beach, CA
• Patent Number(s): US 4700739
• OSTI ID: 5998625
• Resource Relation: Patent File Date: Filed date 14 Nov 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
VALVES
DESIGN
PNEUMATICS
WELL CASINGS
PRESSURE CONTROL
HYDRAULIC FLUIDS
HYDRAULICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
PRESSURE DEPENDENCE
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FLUIDS
MECHANICS
WELLS
WORKING FLUIDS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing