Larry M Walker

US Patent:

6439323, Aug 27, 2002

Filed:

Nov 30, 2000

Appl. No.:

09/726632

Inventors:

Larry B. Walker - Houston TX

Assignee:

WesternGeco L.L.C. - Houston TX

International Classification:

E21B 1066

US Classification:

175273, 175286, 175292, 166 553

Abstract:

An apparatus for shaping boreholes used in seismic operations. A drill body is attached to a drill bit and is movable in axial and rotational directions. Selective operation of the drill body causes a moveable sleeve to operate a reaming bit to extend through a drill body port and into contact with the borehole wall. A cover seals the portion of the port not covered by the reaming bit to prevent loss of a transport fluid within the drill body and to prevent drill cuttings from entering the drill body interior. The cover can be integrated within the movable sleeve or can comprise a separate component. The force exerted by the drill body against the drill bit can be proportional to the force exerted by the reaming bit against the borehole wall. The reaming bit can be operated separately or simultaneously with operation of the drill bit, and can be retracted and reset to perform another shaping operation at a different position within the borehole.

US Patent:

7660201, Feb 9, 2010

Filed:

Aug 22, 2006

Appl. No.:

11/466298

Inventors:

Thomas J. Fleure - Houston TX, US
Larry Walker - Houston TX, US

Assignee:

Autoseis, Inc. - Houston TX

International Classification:

G01V 1/28

US Classification:

367 50, 367 79, 368159, 331 2

Abstract:

A method, apparatus and system for acquiring land seismic data includes acquiring seismic data with a first autonomous seismic data acquisition unit and a second autonomous seismic data acquisition unit wherein each acquisition unit comprises a plurality of digitally controlled temperature-compensated crystal oscillators. Oscillator-based timing signals are acquired that are associated with the plurality of digitally controlled temperature-compensated crystal oscillators and a time correction is determined to apply to the seismic data acquired with the first autonomous seismic data acquisition unit. The time correction is determined using the oscillator-based timing signals from the first and second autonomous seismic data acquisition units.

US Patent:

20100034053, Feb 11, 2010

Filed:

Oct 16, 2009

Appl. No.:

12/580837

Inventors:

Thomas J. Fleure - Missouri City TX, US
Larry Walker - Houston TX, US

Assignee:

AUTOSEIS, INC. - Houston TX

International Classification:

G01V 1/28

US Classification:

367 50

Abstract:

A method, apparatus and system for acquiring land seismic data includes acquiring seismic data with a first autonomous seismic data acquisition unit and a second autonomous seismic data acquisition unit wherein each acquisition unit comprises a plurality of digitally controlled temperature-compensated crystal oscillators. Oscillator-based timing signals are acquired that are associated with the plurality of digitally controlled temperature compensated crystal oscillators and a time correction is determined to apply to the seismic data acquired with the first autonomous seismic data acquisition unit. The time correction is determined using the oscillator-based timing signals from the first and second autonomous seismic data acquisition units.