Rotary acting shear valve for drilling fluid telemetry systems

Patent · Tue Dec 16 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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