Partha Ganguly, 527419 Baldwin Xing, Sugar Land, TX 77479

7560856, Jul 14, 2009

Dec 3, 2007

11/949420

Kuo Chiang Chen - Lexington MA, US
Jahir A. Pabon - Wellesley MA, US
Partha Ganguly - Belmont MA, US
Murat Ocalan - Boston MA, US
Julio C. Guerrero - Cambridge MA, US
Kevin J. Forbes - Houston TX, US

Schlumberger Technology Corporation - Cambridge MA

H01L 41/08

310339, 310800

Electrical energy is produced at a remote or close site by converting kinetic energy from fluid flow with membranes that generates electrical energy in response to deformation by the fluid flow passing though a piezo electric medium attached to the deforming membranes. Sets of membranes define variable fluid flow restrictors that oscillate due to interaction of the force of fluid flow and Bernoulli Effect. The device can be tuned to different flow regimes in order to enhance energy conversion efficiency. Each membrane may include one or more layers of piezoelectric material separated by insulating/stiffening layers. Further, the device may be mounted in a secondary flow path such as a side package or annular tube.

7632323, Dec 15, 2009

Dec 29, 2005

11/322106

Partha Ganguly - Belmont MA, US
Alan O. Humphreys - Somerville MA, US

Schlumberger Technology Corporation - Ridgefield CT

B32B 9/00

51307, 51309, 428141, 428156, 428469, 428698

An abrasion resistant coating and method are provided wherein the abrasion resistant coating contains both ductile and brittle components. The abrasion resistant coating is initially applied to a substrate and is further conditioned such that the wear which occurs at the interface of the abrasion resistant coating and the abrasive environment is ductile wear, as opposed to brittle wear, such that the wear which occurs at said interface is minimized and the service life of the abrasion resistant coating extended.

7665538, Feb 23, 2010

Dec 13, 2006

11/610134

Agathe Robisson - Cambridge MA, US
Partha Ganguly - Belmont MA, US

Schlumberger Technology Corporation - Ridgefield CT

E21B 33/12

166387, 166118, 166135, 166192, 166386

A seal comprising a polymeric material having a first swelling phase having a first swelling characteristic and a second swelling phase having a second swelling characteristic, the first swelling characteristic is greater than the second swelling characteristic is utilized to seal an upper portion from a lower portion of a wellbore. A wellbore seal tool is further described comprising a swellable layer, a supporting assembly disposed adjacent the swellable layer, and an inflatable bladder.

7779933, Aug 24, 2010

Apr 30, 2008

12/112011

Joachim Sihler - Cheltenham, GB
Partha Ganguly - Woburn MA, US
Murat Ocalan - Boston MA, US

Schlumberger Technology Corporation - Cambridge MA

E21B 7/04

175 61, 175 65, 175 73

Steerable drilling systems for facilitating drilling according to a prescribed, three-dimensional trajectory are described. Steering may be achieved using passive actuators which require little or no power. For example, damping elements which couple a drill bit to a drill collar can be used to tilt the drill bit with respect to the drill collar. Alternatively, rotary cutting elements disposed on the drill bit may be used to control the force between the drill bit and the formation at different axial locations. The passive elements used to control the tilt or rotation of the rotary cutting elements are actuated in a certain pattern, e. g. , geostationary, in order to achieve a desired deviation of the well bore while drilling ahead. One way to achieve this is through the use of field-sensitive materials, e. g. magnetorheological (MR) fluids, that change viscosity in response to an applied magnetic field.

7810562, Oct 12, 2010

Aug 11, 2008

12/189572

Huilin Tu - Cambridge MA, US
Agathe Robisson - Cambridge MA, US
Partha Ganguly - Woburn MA, US
Mathew M Samuel - Sugar Land TX, US

Schlumberger Technology Corporation - Cambridge MA

E21B 33/13
E21B 33/138
E21B 43/25

166248, 166249, 166276, 166292, 166294, 166300, 507234, 507254

A sol of metallic alkoxide is pumped into a desired location in a wellbore and allowed to gel, creating solids in-situ. The sol is either unstabilized, requiring rapid placement before gelling, or the sol is stabilized, permitting off-site mixing. Sols can be stabilized with either surfactant or with interfacial polymers. Large concentrations of surfactant can be placed in the sol to create templates around which gelation occurs, creating porous solids.

8286705, Oct 16, 2012

Nov 30, 2009

12/628001

Murat Ocalan - Boston MA, US
Francois Auzerais - Boston MA, US
Partha Ganguly - Woburn MA, US
Agathe Robisson - Cambridge MA, US
Jahir Pabon - Newton MA, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 33/138
E21B 43/25
E21B 43/26
C09K 8/66
C09K 8/70

166283, 166 7511, 166292, 1663083, 166373, 507270, 507271, 507904

Apparatus and methods comprising a plurality of particles which are magnetically attracted to one another in response to exposure to an magnetic field, and which maintain attraction to one another after removal of the magnetic field, the attraction being disabled when the particles are demagnetized, whereby the particles operate to alter the rheological properties of a fluid in which the particles are mixed when the attraction is enabled or disabled is disclosed.

8490707, Jul 23, 2013

Jan 11, 2011

13/004442

Agathe Robisson - Cambridge MA, US
Francois Auzerais - Boston MA, US
Sudeep Maheshwari - Cambridge MA, US
Kuo-Chiang Chen - Sugar Land TX, US
Partha Ganguly - Sugar Land TX, US
Nitin Vaidya - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 33/12

166387, 166187

The subject disclosure relates to apparatus and methods that are particularly suited for creating a seal in a borehole annulus. More particularly, the subject disclosure relates to a seal with enhanced sealing capability. In one embodiment the subject disclosure relates to a reinforced and permanent swellable packer device.

8540015, Sep 24, 2013

Sep 24, 2012

13/625670

Francois M. Auzerais - Boston MA, US
Partha Ganguly - Sugar Land TX, US
Agathe Robisson - Cambridge MA, US
Jahir Pabon - Newton MA, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 33/138
E21B 17/18
E21B 43/26

166 665, 166 651, 1661775, 1662421

Apparatus and method comprising a plurality of particles which are magnetically attracted to one another in response to exposure to a magnetic field, and which maintain attraction to one another after removal of the magnetic field, the attraction being disabled when the particles are demagnetized, whereby the particles operate to alter the rheological properties of a fluid in which the particles are mixed when the attraction is enabled or disabled is disclosed.