Circulating kill valve
A circulating kill valve adapted to be positioned in a well drilling string above a drill bit is described comprising, a body having a bore for allowing the passage of fluid through the drilling string to a drill bit, the body having a port between the bore and the outside of the body, a sleeve valve having a tubular sleeve telescopically movable in the bore, releasing means between the body and the sleeve releasably holding the sleeve in position closing the port, valve means in the bore including a valve seat on the sleeve and a movable valve element above the seat, resilient means yieldably holding the valve means in the open position, pressure responsive means in the bore and connected to the valve element for seating the valve element on the seat on the sleeve in response to increased fluid flow downwardly through the bore thereby shifting the sleeve downwardly to a position opening the port.
- Assignee:
- Camco, Inc., Houston, TX
- Patent Number(s):
- US 4724908
- OSTI ID:
- 5214646
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL EQUIPMENT
DESIGN
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
HYDRAULICS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
PIPES
SLEEVES
VALVES
WELLS