Raju M Eason

7083008, Aug 1, 2006

Mar 6, 2004

10/794726

Richard Thorp - Richmond TX, US
Raju Eason - Stafford TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 4/04
E21B 17/18

175 57, 175107, 175320

An apparatus and related method are useful for compensating the pressure of drilling fluid in a drill collar disposed in a borehole. The apparatus includes a stator adapted for being secured within the drill collar against rotation relative to the drill collar, and a shaft rotatably carried within the stator so as to define a fluid-conducting annular gap between the shaft and the stator. The shaft has a fluid-conducting channel extending axially therethrough. A rotor is secured about the shaft for rotation therewith. A portion of the rotor is disposed adjacent a portion of the stator so as to define an inlet between the rotor and stator portions through which drilling fluid in the drill collar will be conducted. The rotor portion further cooperates with the stator and the shaft to define a first annular cavity that fluidly communicates with the gap and the inlet. A rotary seal is disposed in the first cavity for isolating the gap from the inlet.

20090133930, May 28, 2009

Nov 27, 2007

11/945542

Richard E. Thorp - Shanghai, CN
Raju M. Eason - Stafford TX, US
Charles Borsos - Sugar Land TX, US

SCHLUMBERGER TECHNOLOGY CORPORATION - SUGAR LAND TX

E21B 21/08

175 25

A pressure compensation system for a wellbore instrument coupled to a drill string includes a shaft rotatably mounted with respect to an instrument housing. A lubrication chamber included in the instrument has at least one bearing for rotatably supporting the shaft. The lubrication chamber includes a face seal coupled on one face to the shaft and on another face to the housing. A pressure compensator establishes hydraulic communication between the lubrication chamber and the interior of the drill string. The compensator includes a barrier to fluid movement between the lubrication chamber and the interior of the drill string. The barrier enables pressure communication therebetween. The compensator includes a pressure communication port extending between the barrier and a portion of the shaft exposed to the interior of the drill string.

20120235030, Sep 20, 2012

Mar 13, 2012

13/419303

Christian Stoller - Princeton Junction NJ, US
Richard J. Radtke - Princeton Junction NJ, US
Raju M. Eason - Stafford TX, US
Scott H. Fricke - Houston TX, US

G01V 5/04
E21B 49/00

250256, 166 66

An insert apparatus for use in a test formation for a downhole nuclear spectroscopy tool includes an outer liner, and an inner liner defining a cylindrical borehole having a diameter such that the downhole nuclear spectroscopy tool is receivable therein. There is fill material between the outer liner and the inner liner, the material including a formation base material and an elemental standards material. The outer liner, the inner liner, and the fill material are configured such that an elemental standard measurement derived from a test using the insert apparatus is equivalent to an elemental standard measurement from a selected formation.

51145600, May 19, 1992

Aug 28, 1989

7/400296

Nagabhusan Senapati - Worthington OH
Harold W. Johnson - Kingwood TX
Byung C. Kim - Columbus OH
Satya P. Chauhan - Worthington OH
Dennis A. Gamlen - Missouri City TX
Raju Eason - Stafford TX
H. S. Muralidhara - Dublin OH
Matthew S. Zelinski - Worthington OH

B01D 3300
C25B 700

204299R

A first electrode arrangement and a transport element are movable relative to a support. A working space is disposed between the movable elements for advancing moist material along a processing path. As the moist material advances, electrical current is passed through the material between the first electrode arrangement and a second electrode arrangement adjacent the transport element. An acoustic transducer arrangement disposed adjacent the working space simultaneously subjects the moist material to an acoustic field as the material moves along the processing path. The acoustic field is generated by an array of acoustic transducers spaced along part of the processing path.

52924211, Mar 8, 1994

Feb 25, 1992

7/841095

Nagabhusan Senapati - Worthington OH
Harold W. Johnson - Kingwood TX
Byung C. Kim - Columbus OH
Satya P. Chauhan - Columbus OH
Dennis A. Gamlen - Missouri City TX
Raju Eason - Stafford TX
H. S. Muralidhara - Dublin OH
Matthew S. Zelinski - Worthington OH

B01D 5702
B01D 4300
C02F 1469

204300R

A first electrode arrangement and a transport element are movable relative to a support. A working space is disposed between the movable elements for advancing moist material along a processing path. As the moist material advances, electrical current is passed through the material between the first electrode arrangement and a second electrode arrangement adjacent the transport element. An acoustic transducer arrangement disposed adjacent the working space simultaneously subjects the moist material to an acoustic field as the material moves along the processing path. The acoustic field is generated by an array of acoustic transducers spaced along part of the processing path.