Donald L. Howlett

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Borehole seismic detector system employing stabilizers
- Patent number 6,006,855
- Issue date Dec 28, 1999
- Texaco Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for conducting seismic surveys from a single w...
- Patent number 5,537,364
- Issue date Jul 16, 1996
- Texaco, Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING
Information Patent Grant
Method to selectively affect permeability in a reservoir to control...
- Patent number 5,396,955
- Issue date Mar 14, 1995
- Texaco Inc.
- Donald L. Howlett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for establish the orientation of tools in a ca...
- Patent number 5,351,755
- Issue date Oct 4, 1994
- Texaco Inc.
- Donald L. Howlett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Electromagnetically induced acoustic well logging
- Patent number 5,047,992
- Issue date Sep 10, 1991
- Texaco Inc.
- Donald L. Howlett
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Method and apparatus for cross-well seismic surveying
- Patent number 5,042,611
- Issue date Aug 27, 1991
- Texaco Inc.
- Donald L. Howlett
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Seismic amplifier means and method
- Patent number 4,727,521
- Issue date Feb 23, 1988
- Texaco Inc.
- Herbert J. Meyer
- G01 - MEASURING TESTING
Information Patent Grant
Implosion type energy source for seismic exploration
- Patent number 4,697,255
- Issue date Sep 29, 1987
- Texaco Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING
Information Patent Grant
Streamer cable multiplexing apparatus
- Patent number 4,528,650
- Issue date Jul 9, 1985
- Texaco Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING
Information Patent Grant
Floating point playback system
- Patent number 4,177,457
- Issue date Dec 4, 1979
- Texaco Inc.
- Donald L. Howlett
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital seismic telemetry system
- Patent number 4,112,412
- Issue date Sep 5, 1978
- Texaco Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING
Information Patent Grant
System and method for digitally transmitting well logging information
- Patent number 4,107,644
- Issue date Aug 15, 1978
- Texaco Inc.
- Donald L. Howlett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Logarithmic analog-to-digital converter
- Patent number 4,106,010
- Issue date Aug 8, 1978
- Texaco Inc.
- Donald L. Howlett
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Means and method for recording seismic signals
- Patent number 4,064,480
- Issue date Dec 20, 1977
- Texaco Inc.
- Donald L. Howlett
- G01 - MEASURING TESTING

Donald L. Howlett

Person

Patents Grantslast 30 patents

Borehole seismic detector system employing stabilizers

Method and apparatus for conducting seismic surveys from a single w...

Method to selectively affect permeability in a reservoir to control...

Method and apparatus for establish the orientation of tools in a ca...

Electromagnetically induced acoustic well logging

Method and apparatus for cross-well seismic surveying

Seismic amplifier means and method

Implosion type energy source for seismic exploration

Streamer cable multiplexing apparatus

Floating point playback system

Digital seismic telemetry system

System and method for digitally transmitting well logging information

Logarithmic analog-to-digital converter

Means and method for recording seismic signals