Subsurface well apparatus

Patent · Tue Jul 19 00:00:00 EDT 1977

OSTI ID:7219297

Mott, J D; Miyagishima, T

A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve in through-the-flowline serviced wells is described. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location. 10 claims, 26 figures.

• Assignee: Hydril Co.
• Patent Number(s): US 4036296
• OSTI ID: 7219297
• Resource Relation: Patent File Date: Filed date 23 May 1975
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
42 ENGINEERING
WELLS
VALVES
DESIGN
JOINTS
OFFSHORE SITES
OPERATION
SAFETY
UNDERWATER FACILITIES
WELL CASINGS
WELL COMPLETION
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
423000 - Engineering- Marine Engineering- (1980-)