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Kumar T Kembaiyan

from The Woodlands, TX
Age ~68
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Also known as:
Kt T Kembaiyan, Kut T Kembaiyan, Kembaiyan Kt, Kumar N, Kunar M
Phone and address:
11 Cherry Blossom Pl, Spring, TX 77381
Related to:
Vivek M Kembaiyan, 37Pushpa Kembaiyan, 64Preethi Kembaiyan, 34
Connected to:
Kimberly S Kembel, 62Robert C Kember, 86Duane Kemberly, 67Darshan A Kembhavi, 41Alison Kemble, 51Amy L Kemble, 49Annette Kemble, 53Brandie S Kemble, 38Cara L Kemble, 46Hillary Kemble, 36

Kumar Kembaiyan Phones & Addresses

  • 11 Cherry Blossom Pl, Spring, TX 77381
  • The Woodlands, TX
  • New Haven, CT
  • Philadelphia, PA
  • Edison, NJ
  • Bethlehem, PA
  • Hoboken, NJ

Publications

Us Patents

High-Strength/High-Toughness Alloy Steel Drill Bit Blank

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US Patent:
7044243, May 16, 2006
Filed:
Jan 31, 2003
Appl. No.:
10/356381
Inventors:
Kumar T. Kembaiyan - Spring TX, US
Thomas W. Oldham - Spring TX, US
John (Youhe) Zhang - Tomball TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/00
US Classification:
175425, 761082
Abstract:
Drill bit reinforcing members or blanks of this invention are formed from high-strength steels having a carbon content less than about 0. 3 percent by weight, a yield strength of at least 55,000 psi, a tensile strength of at least 80,000 psi, a toughness of at least 40 CVN-L, Ft-lb, and a rate of expansion percentage change less than about 0. 0025%/ F. during austenitic to ferritic phase transformation. In one embodiment, such steel comprises in the range of from about 0. 1 to 0. 3 percent by weight carbon, 0. 5 to 1. 5 percent by weight manganese, up to about 0. 8 percent by weight chromium, 0. 05 to 4 percent by weight nickel, and 0. 02 to 0. 8 percent by weight molybdenum. In another example, such steel comprises in the range of from about 0. 1 to 0. 3 percent by weight carbon, 0. 9 to 1. 5 percent by weight manganese, 0. 1 to 0.

High-Strength, High-Toughness Matrix Bit Bodies

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US Patent:
7250069, Jul 31, 2007
Filed:
Jun 18, 2003
Appl. No.:
10/464873
Inventors:
Kumar T. Kembaiyan - The Woodlands TX, US
Thomas W. Oldham - The Woodlands TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
C22C 29/08
E21B 10/46
US Classification:
75236, 175374, 51307
Abstract:
A new composition for forming a matrix body which includes spherical sintered tungsten carbide and an infiltration binder including one or more metals or alloys is disclosed. In some embodiments, the composition may include a Group VIIIB metal selected from one of Ni, Co, Fe, and alloys thereof. Moreover, the composition may also include cast tungsten carbide. In addition, the composition may also include carburized tungsten carbide.

Layered Hardfacing, Durable Hardfacing For Drill Bits

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US Patent:
7373997, May 20, 2008
Filed:
Feb 18, 2005
Appl. No.:
11/061305
Inventors:
Kumar T. Kembaiyan - Houston TX, US
Madapusi K. Keshavan - The Woodlands TX, US
Alysia C. White - Houston TX, US
Brian A. White - Houston TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/46
C23C 30/00
US Classification:
175374, 175375
Abstract:
A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket, hardfacing applied to at least a selected portion of the drill bit is shown and described. The hardfacing includes a first hardfacing layer disposed on the selected portion of the drill bit, a second hardfacing layer disposed on the first hardfacing layer, wherein the first hardfacing layer has a hardness different than a hardness of the second hardfacing layer.

Braze Alloys

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US Patent:
7389834, Jun 24, 2008
Filed:
Sep 28, 2004
Appl. No.:
10/952502
Inventors:
Kumar T Kembaiyan - The Woodlands TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/567
US Classification:
175435
Abstract:
An improved braze alloy is microalloyed to include about 0. 0005 wt % to about 0. 5 wt % of at least one aggressively surface acting element selected from tellurium (Te), selenium (Se), antimony (Sb), bismuth (Bi), and gallium (Ga), or any combination thereof. The braze alloys may include at least about 30% by weight of at least one base metal selected from the group of silver (Ag), copper (Cu), gold (Au), nickel (Ni), or aluminum (Al). In one example, a silver braze alloy suitable for brazing a cutter to a drill bit body is microalloyed to improve a characteristic of the braze material.

High-Strength/High Toughness Alloy Steel Drill Bit Blank

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US Patent:
7395884, Jul 8, 2008
Filed:
May 16, 2006
Appl. No.:
11/435413
Inventors:
Kumar T. Kembaiyan - Spring TX, US
Thomas W. Oldham - Spring TX, US
John (Youhe) Zhang - Tomball TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/00
US Classification:
175425, 761082
Abstract:
Drill bit reinforcing members or blanks of this invention are formed from high-strength steels having a carbon content less than about 0. 3 percent by weight, a yield strength of at least 55,000 psi, a tensile strength of at least 80,000 psi, a toughness of at least 40 CVN-L, Ft-lb, and a rate of expansion percentage change less than about 0. 0025%/ F. during austenitic to ferritic phase transformation. In one embodiment, such steel comprises in the range of from about 0. 1 to 0. 3 percent by weight carbon, 0. 5 to 1. 5 percent by weight manganese, up to about 0. 8 percent by weight chromium, 0. 05 to 4 percent by weight nickel, and 0. 02 to 0. 8 percent by weight molybdenum. In another example, such steel comprises in the range of from about 0. 1 to 0. 3 percent by weight carbon, 0. 9 to 1. 5 percent by weight manganese, 0. 1 to 0.

Thermally-Stable Polycrystalline Diamond Materials And Compacts

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US Patent:
7473287, Jan 6, 2009
Filed:
Dec 6, 2004
Appl. No.:
11/005675
Inventors:
John Daniel Belnap - Pleasant Grove UT, US
Stewart N. Middlemiss - Salt Lake City UT, US
Anthony Griffo - The Woodlands TX, US
Thomas W. Oldham - The Woodlands TX, US
Kumar T. Kembaiyan - The Woodlands TX, US
Assignee:
Smith International Inc. - Houston TX
International Classification:
B24D 3/00
B24D 11/00
E21B 10/00
US Classification:
51307, 51293, 51295, 51309, 428408, 428698, 428552, 428553, 428557, 428565
Abstract:
Thermally-stable polycrystalline diamond materials of this invention comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/catalyst material. The reaction product is disposed within interstitial regions of the polycrystalline diamond material that exists between the bonded diamond crystals. The first and second phases are formed during a single high pressure/high temperature process condition. The reaction product has a coefficient of thermal expansion that is relatively closer to that of the bonded together diamond crystals than that of the binder/catalyst material, thereby providing an improved degree of thermal stability to the polycrystalline diamond material.

Bonding Of Cutters In Drill Bits

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US Patent:
7625521, Dec 1, 2009
Filed:
Jun 5, 2003
Appl. No.:
10/455217
Inventors:
Saul N. Izaguirre - Spring TX, US
Thomas W. Oldham - The Woodlands TX, US
Kumar T. Kembaiyan - The Woodlands TX, US
Gary R. Chunn - Conroe TX, US
Anthony Griffo - The Woodlands TX, US
Robert Denton - Pearland TX, US
Brian White - The Woodlands TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
C22C 32/00
B21K 5/02
B21K 5/10
US Classification:
419 10, 419 14, 761011, 761081, 761082, 761084, 761086
Abstract:
A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket. The method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder. The mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body. When the solid bit body is removed from the mold, pockets are formed by the displacements in the bit body and are lined with the layer of superabrasive-free matrix material. The superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiBin exemplary embodiments.

High-Strength, High-Toughness Matrix Bit Bodies

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US Patent:
7661491, Feb 16, 2010
Filed:
Jun 18, 2007
Appl. No.:
11/764661
Inventors:
Kumar T. Kembaiyan - The Woodlands TX, US
Thomas W. Oldham - The Woodlands TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
C22C 29/08
E21B 10/10
US Classification:
175425, 175374, 4285395, 75240
Abstract:
A new composition for forming a matrix body which includes spherical sintered tungsten carbide and an infiltration binder including one or more metals or alloys is disclosed. In some embodiments, the composition may include a Group VIIIB metal selected from one of Ni, Co, Fe, and alloys thereof. Moreover, the composition may also include cast tungsten carbide. In addition, the composition may also include carburized tungsten carbide.
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Kumar T Kembaiyan from The Woodlands, TX, age ~68 Get Report