Safety valve hydraulically operated by telescopic drill stem movement
Patent
·
OSTI ID:6387696
In accordance with an illustrative embodiment of the present invention as disclosed herein, a combination slip joint-safety valve tool includes telescoping mandrel and housing members, a full-opening valve on the housing member operable when closed to prevent upward flow of fluid through said members, and hydraulically operable valve actuator means responsive to contraction of said telescoping members for closing said valve and to extension of said members for opening said valve.
- Assignee:
- Schlumberger Technology Corp.
- Patent Number(s):
- US 4141418
- OSTI ID:
- 6387696
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
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42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
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020300 -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CONTROL EQUIPMENT
DRILL STEM TESTING
DRILLING
EQUIPMENT
FLOW REGULATORS
OFFSHORE OPERATIONS
TESTING
VALVES
WELL DRILLING