Safety valve system with retrievable equalizing feature

Patent · Tue Jun 19 04:00:00 EDT 1984

OSTI ID:6515868

Guidry, Sh L; Jernigan, K D

In accordance with an illustrative embodiment of the present invention, a surface controlled subsurface safety valve system includes a tubing retrievable safety valve having a valve element that is opened and held open in response to the pressure of a control fluid in a control line and automatically closed when control pressure is reduced, and means for equalizing the pressure of fluids above and below said valve element to aid in reopening the same after closure, including a wireline retrievable equalizing valve removably installed in the pocket of a side pocket mandrel that is connected in the tubing above said safety valve, said equalizing valve being arranged to be opened and closed in response to changes in the pressure of said control fluid. A uniquely constructed side pocket mandrel also is disclosed.

• Assignee: Schlumberger Technology Corp.
• Patent Number(s): US 4454913
• OSTI ID: 6515868
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
COMPRESSIBLE FLOW
CONTROL
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
FLUID FLOW
HYDRAULIC CONTROL DEVICES
NATURAL GAS WELLS
OIL WELLS
REMOTE CONTROL
VALVES
WELL RECOVERY EQUIPMENT
WELLS