Oil well safety valve for use with drill pipe

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6632236

Winegeart, M E

A drill string safety valve operator is described comprising: a'. an operator having; a. a rotatable tubular body within the operator housing having a longitudinal through bore for conveying fluids; b. a valve member movably disposed within the body for valving fluid flow through the bore; c. rotatable shaft means extending from and coupled to the valve member for moving the valve to open or close the bore; d. a rotary gear carried by the shaft means; e.rack means connected to the rotary gear defining a coupling between the valve member and the shaft means for rotation with the shaft means for transmitting an applied load into rotation of the shaft means; f. a moving carriage including a rotatable portion that supports the rack means, upper and lower bearing means mounted above and below the rotatable portion, and a carriage housing supporting the bearing means and disposed about the rotatable portion. The bearing means permits rotation of the rotatable portion relative to the carriage housing; and g. power means supporting the carriage housing for powering the carriage to move linearly with respect to the operator housing and between upper and lower positions so that the rack can rotate gear during an opening or a closing of the valve member.

• Assignee: NOV; EDB-87-078550; NOV-87-053446
• Patent Number(s): US 4650153
• OSTI ID: 6632236
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CONTROL EQUIPMENT
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GEARS
MACHINE PARTS
MECHANICAL STRUCTURES
MOTION
OIL WELLS
PIPES
RELIEF VALVES
ROTATION
SHAFTS
SUPPORTS
TUBES
VALVES
WELLS