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Class Information
Number: 340/855.5
Name: Communications: electrical > Wellbore telemetering or control (e.g., subsurface tool guidance, data transfer, etc.) > Pulse or digital signal transmission > Digital signal processing in subsurface transmitter
Description: Subject matter wherein the subsurface signal processing includes a particularly described feature of digital signal handling.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620394 |
Reusing frequencies of a fixed and/or mobile communications system |
Nov. 17, 2009 |
| 7439875 |
Battery conservation |
Oct. 21, 2008 |
| 7423550 |
Two sensor impedance estimation for uplink telemetry signals |
Sep. 9, 2008 |
| 7193525 |
Methods and apparatus for downhole inter-tool communication |
Mar. 20, 2007 |
| 7170411 |
Method of and system for rapidly locating all passive underground electronic marker types |
Jan. 30, 2007 |
| 7132958 |
Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation |
Nov. 7, 2006 |
| 7068183 |
Drill string incorporating an acoustic telemetry system employing one or more low frequency acoustic attenuators and an associated method of transmitting data |
Jun. 27, 2006 |
| 7026951 |
Data telemetry system for multi-conductor wirelines |
Apr. 11, 2006 |
| 6983235 |
Method and apparatus for implementing constant latency Z-domain transfer functions using processor elements of variable latency |
Jan. 3, 2006 |
| 6898149 |
Reprogrammable downhole telemetry and control system |
May. 24, 2005 |
| 6823219 |
Universal optical control and management platform |
Nov. 23, 2004 |
| 6819260 |
Synchronous CDMA telemetry system for use in a wellbore |
Nov. 16, 2004 |
| 6728165 |
Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors |
Apr. 27, 2004 |
| 6567013 |
Digital hydraulic well control system |
May. 20, 2003 |
| 6412025 |
Apparatus and method for automatic configuration of a personal computer system when reconnected to a network |
Jun. 25, 2002 |
| 6396415 |
Method and system of communicating in a subterranean well |
May. 28, 2002 |
| 6252518 |
Communications systems in a well |
Jun. 26, 2001 |
| 6188222 |
Method and apparatus for measuring resistivity of an earth formation |
Feb. 13, 2001 |
| 6091337 |
High voltage contact monitor with built-in self tester |
Jul. 18, 2000 |
| 6084826 |
Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers |
Jul. 4, 2000 |
| 5812068 |
Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto |
Sep. 22, 1998 |
| 5784004 |
Apparatuses and systems for reducing power consumption in remote sensing applications |
Jul. 21, 1998 |
| 5691712 |
Multiple wellbore tool apparatus including a plurality of microprocessor implemented wellbore tools for operating a corresponding plurality of included wellbore tools and acoustic transducers |
Nov. 25, 1997 |
| 5689248 |
Methods for reducing power consumption in remote sensing applications |
Nov. 18, 1997 |
| 5448227 |
Method of and apparatus for making near-bit measurements while drilling |
Sep. 5, 1995 |
| 5365229 |
Adaptive telemetry system for hostile environment well logging |
Nov. 15, 1994 |
| 5363094 |
Stationary system for the active and/or passive monitoring of an underground deposit |
Nov. 8, 1994 |
| 5331318 |
Communications protocol for digital telemetry system |
Jul. 19, 1994 |
| 5191326 |
Communications protocol for digital telemetry system |
Mar. 2, 1993 |
| 5157392 |
Telemetry network for downhole multistation seismic recording tools |
Oct. 20, 1992 |
| 4995058 |
Wireline transmission method and apparatus |
Feb. 19, 1991 |
| 4901289 |
System for acquiring and recording signals delivered by a set of sensors disposed in well probes |
Feb. 13, 1990 |
| 4896152 |
Telemetry system with a sending station using recursive filter for bandwidth limiting |
Jan. 23, 1990 |
| 4873522 |
Method for transmitting downhole data in a reduced time |
Oct. 10, 1989 |
| 4855732 |
System for the transmission of signals between a reception assembly lowered into a well and a central control and recording laboratory |
Aug. 8, 1989 |
| 4845494 |
Method and apparatus using casing and tubing for transmitting data up a well |
Jul. 4, 1989 |
| 4839644 |
System and method for communicating signals in a cased borehole having tubing |
Jun. 13, 1989 |
| 4770034 |
Method and apparatus for data transmission in a well bore containing a conductive fluid |
Sep. 13, 1988 |
| 4757314 |
Apparatus for the control and monitoring of a well head submerged in a liquid |
Jul. 12, 1988 |
| 4739325 |
Apparatus and method for down-hole EM telemetry while drilling |
Apr. 19, 1988 |
| 4725837 |
Toroidal coupled telemetry apparatus |
Feb. 16, 1988 |
| 4718011 |
Well logging data acquisition, telemetry and control method and system |
Jan. 5, 1988 |
| 4709234 |
Power-conserving self-contained downhole gauge system |
Nov. 24, 1987 |
| 4665398 |
Method of sampling and recording information pertaining to a physical condition detected in a well bore |
May. 12, 1987 |
| 4663628 |
Method of sampling environmental conditions with a self-contained downhole gauge system |
May. 5, 1987 |
| 4661932 |
Dynamic downhole recorder |
Apr. 28, 1987 |
| 4592033 |
Apparatus for improving the data transmission rate in a telemetry system |
May. 27, 1986 |
| 4568932 |
Method and apparatus for obtaining high resolution subsurface geophysical measurements |
Feb. 4, 1986 |
| 4525715 |
Toroidal coupled telemetry apparatus |
Jun. 25, 1985 |
| 4506263 |
Data transmission system for logging tools |
Mar. 19, 1985 |
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