Wei Lin Tang

US Patent:

7954564, Jun 7, 2011

Filed:

Jul 24, 2008

Appl. No.:

12/179469

Inventors:

Navish Makkar - Houston TX, US
Wei Tang - Katy TX, US
Gordon Whipple - Spring TX, US
Tommy Laird - Cypress TX, US
Gail Nelson - Tomball TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 10/32

US Classification:

175263, 175284, 175384, 175406

Abstract:

A secondary cutting structure for sure in a drilling assembly, the secondary cutting structure including a tubular body and a block, extendable from the tubular body, the block including a first arrangement of cutting elements disposed on a first blade and a second arrangement of cutting elements disposed on a second blade, wherein the second arrangement is a modified redundant arrangement. Also, a secondary cutting structure for use in a drilling assembly, the secondary cutting structure including a leading blade disposed on a first block and a trailing blade disposed on the first block adjacent the leading blade. Additionally, the secondary cutting structure includes a unique blade disposed on a second block, wherein a gage portion of at least one of the blades has a length between 30% and 45% of a total blade length.

US Patent:

8401831, Mar 19, 2013

Filed:

Jul 24, 2008

Appl. No.:

12/179516

Inventors:

Wei Tang - Katy TX, US
Gordon Whipple - Spring TX, US
Sujian J. Huang - Beijing, CN
Navish Makkar - Houston TX, US
Tommy Laird - Cypress TX, US
Gail Nelson - Tomball TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

G06G 7/48

US Classification:

703 7

Abstract:

A method for designing a secondary cutting structure for use in a bottom hole assembly, the method including defining initial design parameters for the secondary cutting structure and analyzing forces acting on the secondary cutting structure. Additionally, the method includes modifying at least one design element of the secondary cutting structure and simulating an effect of the modifying on both the secondary cutting structure and a primary cutting structure to determine if an improved condition is met. Also, a method for designing a drilling tool assembly, the method including defining initial drilling tool assembly design parameters including a primary cutting structure and a secondary cutting structure, and simulating a dynamic response of the drilling tool assembly. Additionally, the method includes adjusting at least one design element of the secondary cutting structure based on the dynamic response of the drilling tool assembly, determining if the adjusted design element improved a condition of the drilling, and repeating the simulating and adjusting until the condition is optimized.

US Patent:

20120074692, Mar 29, 2012

Filed:

Sep 23, 2011

Appl. No.:

13/242922

Inventors:

Kenneth Darrel Chelette - Houston TX, US
Wei Tang - Katy TX, US

International Classification:

F16L 15/00

US Classification:

285333, 285328

Abstract:

Ends of separate tubular members used in oil and gas drilling are connected pin-to-pin by a threaded coupling and made leak tight by an internal pressure seal, wherein the male or field end pin of a first tubular member has an integral geometry designed to mate with the female or mill end pin of a second tubular member. Coupling and tubular members possess modified a buttress thread form having a negative load flank angle and a positive stab flank angle. When assembled, coupling connects field end pin of first tubular member with mill end pin of second tubular member, wherein integral geometries of mated pin ends generate the interference necessary to produce a single, metal-to-metal, leak-tight, internal contact pressure seal. An external ball and cylinder contact seal at each end of the coupling provides additional sealing capacity when used in combination with the internal contact pressure seal.

US Patent:

20130253120, Sep 26, 2013

Filed:

Mar 26, 2012

Appl. No.:

13/430247

Inventors:

Rahul R. KULKARNI - Houston TX, US
Pradeep P. Shirodkar - Houston TX, US
Alistair D. Westwood - Kingwood TX, US
Donna J. Crowther - Seabrook TX, US
Wei Tang - Houston TX, US

International Classification:

C09D 5/16
C08K 3/34
C09D 123/36
C07D 237/08
C08F 8/30
C08L 23/36
B82Y 30/00

US Classification:

524447, 5253337, 5253339, 5253341, 5253332, 524445, 524570, 544224, 977773

Abstract:

A functionalized polyolefin having one or more pyridazine moieties is disclosed herein. A method to produce the functionalized polyolefin is also disclosed. A composition including the functionalized polyolefin is also disclosed.

US Patent:

20170198839, Jul 13, 2017

Filed:

Mar 29, 2017

Appl. No.:

15/472333

Inventors:

- Houston TX, US
Wei Tang - Katy TX, US

International Classification:

F16L 15/00
E21B 17/042
F16L 15/06

Abstract:

Ends of separate tubular members used in oil and gas drilling are connected pin-to-pin by a threaded coupling and made leak tight by an internal pressure seal, wherein the male or field end pin of a first tubular member has an integral geometry designed to mate with the female or mill end pin of a second tubular member. The coupling and tubular members possess a modified buttress thread form having a negative load flank angle and a positive stab flank angle. When assembled, the coupling connects the field end pin of the first tubular member with the mill end pin of the second tubular member, wherein integral geometries of the mated pin ends generate the interference necessary to produce a single, metal-to-metal, leak-tight, internal contact pressure seal.

US Patent:

20150361027, Dec 17, 2015

Filed:

May 27, 2015

Appl. No.:

14/722638

Inventors:

- Baytown TX, US
Wei Tang - Houston TX, US
Stephen Zushma - Clinton NJ, US
Christine A. Costello - Easton PA, US
Diana Smirnova - Spring TX, US
Madhavi Vadlamudi - Clinton NJ, US
Victor DeFlorio - Cranford NJ, US

International Classification:

C07C 69/78
C07C 67/39

Abstract:

A biphenyl diester useful as a plasticizer having the formula (I):wherein Ris an alkyl group having 5 to 15 carbon atoms and Ris a methyl group or a phenyl group.

US Patent:

20150061288, Mar 5, 2015

Filed:

Nov 10, 2014

Appl. No.:

14/536828

Inventors:

- Pittsburgh PA, US
Wei Tang - Katy TX, US

International Classification:

F16L 15/00
F16L 15/06

US Classification:

285334

Abstract:

Ends of separate tubular members used in oil and gas drilling are connected pin-to-pin by a threaded coupling and made leak tight by an internal pressure seal, wherein the male or field end pin of a first tubular member has an integral geometry designed to mate with the female or mill end pin of a second tubular member. The coupling and tubular members possess a modified buttress thread form having a negative load flank angle and a positive stab flank angle. When assembled, the coupling connects the field end pin of the first tubular member with the mill end pin of the second tubular member, wherein integral geometries of the mated pin ends generate the interference necessary to produce a single, metal-to-metal, leak-tight, internal contact pressure seal. An external ball and cylinder contact seal at each end of the coupling provides additional sealing capacity when used in combination with the internal contact pressure seal.

US Patent:

20140275605, Sep 18, 2014

Filed:

Mar 7, 2014

Appl. No.:

14/201224

Inventors:

- Baytown TX, US
Lorenzo C. DeCaul - Langhorne PA, US
Wei Tang - Houston TX, US

International Classification:

C08K 5/12
C07C 13/28
C07C 15/14
C07C 63/331

US Classification:

560 76, 562488, 585 25, 585268, 585252

Abstract:

A composition is described comprising a mixture of (methylcyclohexyl)toluene isomers having the following formula:wherein the mixture comprises at least 50 wt % in total of the 3,3, 3,4 4,3 and 4,4-isomers of (methylcyclohexyl)toluene.