Arvind C Patel

US Patent:

6553536, Apr 22, 2003

Filed:

Jul 7, 2000

Appl. No.:

09/611872

Inventors:

Martin Aureliano Hassner - Mountain View CA
Richard Michael Hamilton New - San Jose CA
Arvind Motibhai Patel - San Jose CA
Tetsuya Tamura - Kanagawa, JP
Barry Marshall Trager - Yorktown Heights NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H03M 1300

US Classification:

714780, 714781

Abstract:

A soft error correction algebraic decoder and an associated method use erasure reliability numbers to derive error locations and values. More specifically, symbol reliability numbers from a maximum likelihood (ML) decoder as well as a parity check success/failure from inner modulation code symbols are combined by a Reed-Solomon decoder in an iterative manner, such that the ratio of erasures to errors is maximized. The soft error correction (ECC) algebraic decoder and associated method decode Reed Solomon codes using a binary code and detector side information. The Reed Solomon codes are optimally suited for use on erasure channels. A threshold adjustment algorithm qualifies candidate erasures based on a detector error filter output as well as modulation code constraint success/failure information, in particular parity check or failure as current modulation codes in disk drive applications use parity checks. This algorithm creates fixed erasure inputs to the Reed Solomon decoder. A complementary soft decoding algorithm of the present invention teaches the use of a key equation solver algorithm that calculates error patterns obtained as a solution to a weighted rational interpolation problem with the weights given by the detector side information.

US Patent:

20040072696, Apr 15, 2004

Filed:

May 19, 2003

Appl. No.:

10/441270

Inventors:

Arvind Patel - Houston TX, US

Assignee:

M-I LLC. - Houston TX

International Classification:

C09K007/06

US Classification:

507/100000

Abstract:

An invert emulsion suitable for drilling subterranean wells, in particular oil and gas wells is disclosed which has negative alkalinity and includes an oleaginous phase, and a non-oleaginous phase and an emulsifying agent which stabilizes the invert emulsion under conditions of negative alkalinity. The practice of the present invention permits the formulation of drilling fluids which are absent an alkaline reserve and yet are suitable for drilling oil and gas wells.

US Patent:

20100300979, Dec 2, 2010

Filed:

Nov 19, 2008

Appl. No.:

12/744732

Inventors:

Alan Gilmour - Houston TX, US
Arvind D. Patel - Sugar Land TX, US

Assignee:

M-I LLC - Houston TX

International Classification:

B01D 21/01

US Classification:

210712

Abstract:

A method of treating silicate-based wellbore fluids that includes flocculating at least a portion of contaminants contained in a silicate-based wellbore fluid out of the fluid phase; and separating the flocculated contaminants from the fluid phase. Methods of recycling silicate-based fluids, methods of disposing used silicate-based fluid, and methods of disposing of wellbore fluid waste are also disclosed.

US Patent:

20110094747, Apr 28, 2011

Filed:

May 9, 2008

Appl. No.:

12/991569

Inventors:

Sashikumar Mettath - Houston TX, US
Arvind D. Patel - Sugar Land TX, US
Emanuel Stamatakis - Houston TX, US
Steven Young - Cypress TX, US

Assignee:

M-I L.L.C. - Houston TX

International Classification:

E21B 37/00
E21B 7/00

US Classification:

166311, 175 57

Abstract:

A method of removing clay compounded on drilling equipment in a well that includes contacting the drilling equipment with a treatment fluid comprising an oxidizing agent. Methods disclosed also relate to drilling a wellbore though a clay-containing formation that includes drilling through the formation with a water-containing drilling fluid; reducing applied weight-on-bit when bit balling detected; emplacing a treatment fluid comprising an oxidizing agent to disrupt clay compounded on drilling equipment; and increasing weight-on-bit to continue drilling through the formation

US Patent:

20110100628, May 5, 2011

Filed:

Jun 17, 2009

Appl. No.:

13/000518

Inventors:

Jason T. Scorsone - Houston TX, US
Arvind D. Patel - Sugar Land TX, US
Mark W. Sanders - Aberdeen, GB

Assignee:

M-I L.L.C. - Houston TX

International Classification:

C09K 8/00
E21B 43/00

US Classification:

166300, 507234, 1663051

Abstract:

A method of treating a formation that includes injecting gelling components curable by a moisture cure into a selected region of the formation; and controlling the onset of curing of the gelling components by contacting the gelling components with a drying agent is disclosed.

US Patent:

20110278006, Nov 17, 2011

Filed:

Jan 29, 2010

Appl. No.:

13/146750

Inventors:

Mark W. Sanders - Aberdeen, GB
Jason T. Scorsone - Houston TX, US
Arvind D. Patel - Sugar Land TX, US

Assignee:

M-I L.L.C. - Houston TX

International Classification:

E21B 33/13
C09K 8/58
E21B 33/138

US Classification:

166293, 166292, 507269, 507214, 507219, 507224, 507221, 507230

Abstract:

A slurry for treating a wellbore that includes a base fluid; at least one fibrous structure; and a plurality of calcium silicate particles is disclosed. Methods of reducing loss of wellbore fluid in a wellbore to a formation using an LCM pill having calcium silicate particles therein is also disclosed.

US Patent:

20120067575, Mar 22, 2012

Filed:

Mar 22, 2011

Appl. No.:

13/053990

Inventors:

Mark Luyster - Houston TX, US
Arvind D. Patel - Sugar Land TX, US
Sooi Kim Lim - Houston TX, US

Assignee:

M-I L.L.C. - Houston TX

International Classification:

E21B 43/04
E21B 43/16

US Classification:

166278, 1663051

Abstract:

In a method of gravel packing a wellbore in a subterranean formation, the wellbore comprising a cased section and an uncased section, the method may include pumping into the wellbore a gravel pack composition comprising gravel and a carrier fluid comprising an invert emulsion fluid, where the invert emulsion fluid may comprise: an oleaginous external phase; a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 50:50 and an emulsifier stabilizing the oleaginous external phase and the non-oleaginous internal phase.

US Patent:

58694331, Feb 9, 1999

Filed:

Aug 30, 1995

Appl. No.:

8/520963

Inventors:

Arvind D. Patel - Houston TX

Assignee:

M-I L.L.C. - Houston TX

International Classification:

C09K 700
C09K 702
C09K 706

US Classification:

507103

Abstract:

The present invention relates to an oil-based drilling fluid, a continuous phase for an oil-based drilling fluid, and additives for an oil-based drilling fluid. The drilling fluid, the continuous phase of the drilling fluid, and the additives for the oil-based drilling fluid are characterized by non-fluorescence (defined as a fluorescence intensity of 800 or less) when exposed to ultraviolet light. The continuous phase of the drilling fluid is composed of synthetic hydrocarbons selected from the group consisting of oligomers synthesized from one or more alphaolefins containing a C. sub. 2 to C. sub. 14 chain length, wherein the oligomers have an average molecular weight of from 120 to 100, and additives. The additives of the continuous phase include surfactants, wetting agents and/or emulsifiers.