Bleedoff tool for well test system

Patent · Tue Sep 15 04:00:00 EDT 1987

OSTI ID:6130970

Taylor, F H

This patent describes a safety system for testing underwater wells comprising: (a) a riser on a blowout preventer spaced above a landing shoulder in the well casing; and (b) a string of test pipe in the well casing and riser including a retainer valve spaced above a bleedoff tool having a piston, a body rotatably mounted and sealed around the piston and closed flow passage means therein, the passage means openable by relative rotation between the piston and body to permit flow between the inside of the bleedoff tool and the riser, the bleedoff tool spaced above a subsea test tree having an upper latch section releasably connectable to a lower body and the subsea test tree spaced above a hanger near the upper end of the string.

• Assignee: Otis Engineering Corp., Dallas, TX
• Patent Number(s): US 4693315
• OSTI ID: 6130970
• 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
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
MARINE RISERS
MOTION
NATURAL GAS WELLS
OIL WELLS
PIPES
PISTONS
ROTATION
SEALS
TESTING
VALVES
WELL CASINGS
WELLS