Rotary acting shear valve for drilling fluid telemetry systems

Patent · Tue Dec 16 00:00:00 EST 1986

OSTI ID:7062572

Larronde, M L

This patent describes a valve apparatus useful in a borehole drilling fluid telemetry system for transmitting data pulses from one end of a pipe string to another by imparting pressure pulses to a drilling fluid circulating down the pipe string, through a drilling member and up the annulus between the pipe string and borehole wall. The valve is operated in the drilling fluid flow path to modulate the flow of the drilling fluid and thereby impart detectable pressure pulses to the drilling fluid. The apparatus comprises a housing disposable within the drill string, adapted for the flow of drilling fluid therearound and formed with a passage therethrough for selectable flow communication between the drill string and the borehole annulus; a shear valve mounted within the housing across the passage and comprising a valve seat and rotational gate member having alignable seat and gate openings formed therethrough, the gate opening being movable in an arc into and out of axial alignment with the seat opening; and valve actuation means for coupling to the gate for rotationally moving the gate opening through an arc relative to the seat opening to open the passage and generate a pressure pulse. The valve actuation means comprises a first solenoid and cam means coupled thereto for translating the non-linear, axial forces of the solenoid into generally linear, rotational forces for rotating the valve gate.

• Assignee: NL Industries, Inc., New York, NY
• Patent Number(s): US 4630244
• OSTI ID: 7062572
• Resource Relation: Patent File Date: Filed date 30 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILLING FLUIDS
MONITORING
NATURAL GAS WELLS
MWD SYSTEMS
OIL WELLS
ALIGNMENT
BOREHOLES
DRILL BITS
DRILL PIPES
FLUID FLOW
PRESSURE EFFECTS
PULSES
ROTATION
SHEAR
TELEMETRY
VALVES
CAVITIES
COMMUNICATIONS
CONTROL EQUIPMENT
DATA TRANSMISSION
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUIDS
MOTION
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing