JAMES HARTMAN HALL
Audiology at Holcombe Blvd, Houston, TX

6373254, Apr 16, 2002

May 25, 1999

09/320367

Dominique Dion - Houston TX
Mark T. Frey - Sugar Land TX
James Stephen Hall - Houston TX
Qiming Li - Sugar Land TX
Richard A. Rosthal - Houston TX
Mark A. Fredette - Houston TX

Schlumberger Technology Corporation - Sugar Land TX

G01V 320

324369, 324373, 324375

The present invention describes a method and apparatus to control the effect of contact impedance on a formation resistivity measurement during a logging-while-drilling operation. The control of contact impedance is accomplished by maintaining a substantially zero difference in potential between two monitor electrodes positioned on the resistivity logging tool near a current electrode. The tool can employ a ring electrode configuration and/or a button electrode, configuration. The ring electrode configuration incorporates two pairs of ring monitor electrodes on each side of a ring current electrode. The button electrode configuration incorporates. a monitor electrode, surrounded by a current electrode, surrounded by a second monitor electrode. Insulation gaps are positioned between each electrode to separate the electrodes. A variable current is supplied to the current electrode in each configuration to maintain the same potential at each monitor electrode.

6840317, Jan 11, 2005

Mar 2, 2001

10/220455

John Michele Hirsch - Houston TX, US
George Leo Stegemeier - Houston TX, US
James William Hall - Houston TX, US
Robert Rex Burnett - Katy TX, US
William Mountjoy Savage - Houston TX, US

Shell Oil Company - Houston TX

E21B 4700, E21B 4706

16625015, 166372

A method for optimizing the production of a petroleum well is provided. The petroleum well includes a borehole, a piping structure positioned within the borehole, and a tubing string positioned within the borehole for conveying a production fluid. Production of the well is optimized by determining a flow rate of the production fluid within the tubing string and determining a lift-gas injection rate for the gas being injected into the tubing string. The flow rate and injection rate data is communicated along the piping structure of the well to a selected location, where the data is collected and analyzed. After analysis of the data, an optimum operating point for the well can be determined.

4915137, Apr 10, 1990

Aug 15, 1988

7/231958

James A. Hall - Houston TX
Clyde M. Robinson - Houston TX

B65D 5906

138 96R

A flange protector for use with flanged pipe, pressure vessels and the like, having a peripheral flange with an outer peripheral surface and a central opening for the pipe or vessel and having holes in the flange for receiving bolts. The flange protector comprises a sheet-form plastic cover member with a dished central portion fitted into the central opening of the flange and a portion extending radially outward to cover the flange and the holes therein and an edge portion extending normal thereto to cover at least part of the peripheral surface of the flange. The radially extending cover portion is secured to the flange by the flange holes. The flange is a female flange with holes therein, the cover member radially extending portion has indentations or hollow protrusions fitting into each of the flange holes, each having an aperture with fasteners positioned therein extending into the flange holes to secure the cover member in place.

7525315, Apr 28, 2009

Apr 1, 2004

10/708926

Mark A. Fredette - Houston TX, US
James Stephen Hall - Houston TX, US
Mark T. Frey - Sugar Land TX, US
Dominique Dion - Plaisir, FR

Schlumberger Technology Corporation - Sugar Land TX

G01V 3/10, G01V 3/18

324342, 324339, 324355

A combined resistivity tool incorporating both induction/propagation antennas and lateral resistivity antennas disposed in recesses of downhole tubulars, in which a lateral resistivity antenna includes an insulating base layer disposed in the recess; a toroidal antenna disposed over the insulating base layer; and a shield disposed over the recess.