Measuring while drilling apparatus mud pressure signal valve

Patent · Tue Dec 09 04:00:00 EST 1986

OSTI ID:6789796

Peppers, J M; Shaikh, F A

This patent describes a measurement while drilling system for borehole drilling having a downhole instrument connectable in a drill string of a rotary drilling rig including apparatus to sense geological and geophysical parameters and a valve apparatus to pulse modulate drilling fluid flowing in the drill string. A surface apparatus is connected to a drilling fluid flow conductor for extracting intelligence carrying information from the modulated drilling fluid. An improved valve apparatus is described comprising: (a) a drilling fluid flow pulse modulating pressure pulse valve member longitudinally, movably mounted in a body member and movable from a retracted position substantially removed from the drilling fluid flow and an extended position disposed at least partially within the drilling fluid flow thereby temporarily restricting drilling fluid flow within the drill string; and (b) the pulse valve member is a tubular member having a lower end portion displaceable from the body member into the drilling fluid and an upper end portion with opposed fluid pressure force areas thereon being in fluid communication with the drilling fluid flow such that forces due to the drilling fluid acting on the pressure pulse valve member are balanced in a longitudinal direction.

• Assignee: Dresser Industries, Inc., Dallas, TX
• Patent Number(s): US 4628495
• OSTI ID: 6789796
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACTUATORS
CONTROL
CONTROL EQUIPMENT
CYLINDERS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
DRILLING RIGS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
GEOLOGIC SURVEYS
GEOPHYSICAL SURVEYS
MWD SYSTEMS
NATURAL GAS WELLS
OIL WELLS
PIPES
PISTONS
POSITIONING
PRESSURE CONTROL
PRESSURE REGULATORS
PULSES
ROTARY DRILLING
SEALS
SIGNALS
SURVEYS
VALVES
WELLS