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Class Information
Number: 367/84
Name: Communications, electrical: acoustic wave systems and devices > Wellbore telemetering > Through well fluids > Rotary valve control
Description: Subject matter wherein the acoustic waves are generated by rotational movement of structure which modulates the well fluid flow.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| RE40944 |
Adjustable shear valve mud pulser and controls therefor |
Oct. 27, 2009 |
| 7564741 |
Intelligent efficient servo-actuator for a downhole pulser |
Jul. 21, 2009 |
| 7532540 |
Fluid erosion protection washer for rotating shaft in MWD tool |
May. 12, 2009 |
| 7468679 |
Method and apparatus for mud pulse telemetry |
Dec. 23, 2008 |
| 7405998 |
Method and apparatus for generating fluid pressure pulses |
Jul. 29, 2008 |
| 7400262 |
Apparatus and methods for self-powered communication and sensor network |
Jul. 15, 2008 |
| 7327634 |
Rotary pulser for transmitting information to the surface from a drill string down hole in a well |
Feb. 5, 2008 |
| 7280432 |
Oscillating shear valve for mud pulse telemetry |
Oct. 9, 2007 |
| 7250873 |
Downlink pulser for mud pulse telemetry |
Jul. 31, 2007 |
| 7230880 |
Rotational pulsation system and method for communicating |
Jun. 12, 2007 |
| 6975244 |
Oscillating shear valve for mud pulse telemetry and associated methods of use |
Dec. 13, 2005 |
| 6970398 |
Pressure pulse generator for downhole tool |
Nov. 29, 2005 |
| 6850463 |
Borehole logging apparatus for deep well drilling |
Feb. 1, 2005 |
| 6757218 |
Semi-passive two way borehole communication apparatus and method |
Jun. 29, 2004 |
| 6714138 |
Method and apparatus for transmitting information to the surface from a drill string down hole in a well |
Mar. 30, 2004 |
| 6626253 |
Oscillating shear valve for mud pulse telemetry |
Sep. 30, 2003 |
| 6469637 |
Adjustable shear valve mud pulser and controls therefor |
Oct. 22, 2002 |
| 6414905 |
Method and apparatus for communicating coded messages in a wellbore |
Jul. 2, 2002 |
| 6219301 |
Pressure pulse generator for measurement-while-drilling systems which produces high signal strength and exhibits high resistance to jamming |
Apr. 17, 2001 |
| 6094401 |
Inverse vertical seismic profiling using a measurement while drilling tool as a seismic source |
Jul. 25, 2000 |
| 5787052 |
Snap action rotary pulser |
Jul. 28, 1998 |
| 5740126 |
Turbo siren signal generator for measurement while drilling systems |
Apr. 14, 1998 |
| 5636178 |
Fluid driven siren pressure pulse generator for MWD and flow measurement systems |
Jun. 3, 1997 |
| 5586083 |
Turbo siren signal generator for measurement while drilling systems |
Dec. 17, 1996 |
| 5583827 |
Measurement-while-drilling system and method |
Dec. 10, 1996 |
| 5517464 |
Integrated modulator and turbine-generator for a measurement while drilling tool |
May. 14, 1996 |
| 5375098 |
Logging while drilling tools, systems, and methods capable of transmitting data at a plurality of different frequencies |
Dec. 20, 1994 |
| 5357483 |
Downhole tool |
Oct. 18, 1994 |
| 5249161 |
Methods and apparatus for preventing jamming of encoder of logging while drilling tool |
Sep. 28, 1993 |
| 5237540 |
Logging while drilling tools utilizing magnetic positioner assisted phase shifts |
Aug. 17, 1993 |
| 5215152 |
Rotating pulse valve for downhole fluid telemetry systems |
Jun. 1, 1993 |
| 5197040 |
Borehole data transmission apparatus |
Mar. 23, 1993 |
| 5189645 |
Downhole tool |
Feb. 23, 1993 |
| 5182731 |
Well bore data transmission apparatus |
Jan. 26, 1993 |
| 5119344 |
Downhole tool |
Jun. 2, 1992 |
| 5073877 |
Signal pressure pulse generator |
Dec. 17, 1991 |
| 4956823 |
Signal transmitters |
Sep. 11, 1990 |
| 4914637 |
Measure while drilling system |
Apr. 3, 1990 |
| 4847815 |
Sinusoidal pressure pulse generator for measurement while drilling tool |
Jul. 11, 1989 |
| 4785300 |
Pressure pulse generator |
Nov. 15, 1988 |
| 4771408 |
Universal mud pulse telemetry system |
Sep. 13, 1988 |
| 4734892 |
Method and tool for logging-while-drilling |
Mar. 29, 1988 |
| 4715022 |
Detection means for mud pulse telemetry system |
Dec. 22, 1987 |
| 4703461 |
Universal mud pulse telemetry system |
Oct. 27, 1987 |
| 4675852 |
Apparatus for signalling within a borehole while drilling |
Jun. 23, 1987 |
| 4630244 |
Rotary acting shear valve for drilling fluid telemetry systems |
Dec. 16, 1986 |
| 4499563 |
Apparatus for transmitting data from a borehole to the surface of the earth during the operation of a drilling device |
Feb. 12, 1985 |
| 4303994 |
System and method for monitoring drill string characteristics during drilling |
Dec. 1, 1981 |
| 4167000 |
Measuring-while drilling system and method having encoder with feedback compensation |
Sep. 4, 1979 |
| RE30055 |
Apparatus for transmitting well bore data |
Jul. 24, 1979 |
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