公开(公告)号：GB2391236B

公开(公告)日：2006-01-25

申请号：GB0317338

申请日：2003-07-24

Applicant: SMITH INTERNATIONAL

Inventor： KESHAVAN MADAPUSI K ,  TRUAX DAVID K ,  GRIFFO ANTHONY ,  LIANG DAH-BEN

IPC: C22C29/08 ,  C23C30/00 ,  E21B10/50 ,  E21B10/56 ,  E21B10/567

公开(公告)号：CA2489187A1

公开(公告)日：2005-06-05

申请号：CA2489187

申请日：2004-12-03

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART N ,  BELNAP JOHN DANIEL ,  KEMBAIYAN KUMAR T ,  GRIFFO ANTHONY ,  OLDHAM THOMAS W

IPC: B01J3/06 ,  B22F7/06 ,  B24D3/00 ,  B24D11/00 ,  C01B31/06 ,  C04B35/52 ,  C04B35/645 ,  C22C26/00 ,  E21B10/00 ,  E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  C30B29/04 ,  C30B28/00 ,  C30B33/06 ,  E21B10/46

Abstract: Thermally-stable polycrystalline diamond materials of this invention compris e a first phase including a plurality of bonded together diamond crystals, and a second phas e 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 interstiti al 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 .

公开(公告)号：GB2408474A

公开(公告)日：2005-06-01

申请号：GB0425973

申请日：2004-11-25

Applicant: SMITH INTERNATIONAL

Inventor： LOCKWOOD GARY ,  RAMAMURTHY VISWANADHAM ,  GRIFFO ANTHONY

IPC: B23K9/04 ,  B23K10/02 ,  B23K26/34 ,  B23K35/02 ,  B23K35/32 ,  C23C30/00 ,  E21B10/50 ,  B23K5/18

Abstract: A hardfacing material comprises carbide particles that have a barrier coating of cobalt, nickel, iron or an alloy thereof, and a binder alloy. The carbide particles may be sintered tungsten carbide with a size of 16-40 mesh (420-1190 microns) or a size of 100-325 mesh. The barrier coating has a thickness of 5-76 microns. The material is used to hardface steel drill bit components such as cutting elements on roller cone drill bits.

公开(公告)号：CA2616245A1

公开(公告)日：2005-02-13

申请号：CA2616245

申请日：2004-08-16

Applicant: SMITH INTERNATIONAL

Inventor： CAWTHORNE CHRIS E ,  GRIFFO ANTHONY ,  RICHMAN LANCE T ,  VIWANADHAM RAMAMURTHY

IPC: E21B10/08 ,  E21B10/16 ,  E21B10/50

公开(公告)号：CA2477673A1

公开(公告)日：2005-02-13

申请号：CA2477673

申请日：2004-08-16

Applicant: SMITH INTERNATIONAL

Inventor： VIWANADHAM RAMAMURTHY ,  RICHMAN LANCE T ,  CAWTHORNE CHRIS E ,  GRIFFO ANTHONY

IPC: E21B10/16 ,  E21B10/08 ,  B21K5/02 ,  B23P15/28 ,  E21B10/50

Abstract: A shaped insert that includes a top portion, and a grip length, wherein t he grip length is modified to have a non-uniform cross sectional area is disclosed. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is modified such that the insert is non-cylindrical. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is coated in a non-uniform manner.

公开(公告)号：GB2402981A

公开(公告)日：2004-12-22

申请号：GB0412992

申请日：2004-06-11

Applicant: SMITH INTERNATIONAL

Inventor： KESHAVAN MADAPUSI K ,  GRIFFO ANTHONY ,  WHITE ALYSIA CANSON ,  DENTON ROBERT ,  HEEL PATRICIA ,  TINKHAM LEROY N ,  SIRACKI MICHAEL A

IPC: F16J15/10 ,  F16J15/32 ,  E21B10/22

Abstract: An elastomeric seal (44 in Fig. 2) comprising an ordered elastomeric composite material 48, the ordered elastomeric composite material comprising an ordered arrangement of a number of first elstopmeric phases distributed uniformly within a continuous matrix second phase. The second phase may be formed from an elastomeric material that is relatively harder than an elastomeric material that is used to form the first phases. Each first phase can be of the form of a core 52, and the second phase can be formed from a number of shells 54 that each surround a repective core 52, the cores 52 and shells 54 are aligned coaxially with one another to provide a cellular structure 50. The seal being typically of the form of an annular ring (44 in Fig. 2) adapted for use in a rotary cone drill bit.

公开(公告)号：GB2361935B

公开(公告)日：2004-07-28

申请号：GB0102484

申请日：2001-01-31

Applicant: SMITH INTERNATIONAL

Inventor： FANG ZHIGANG ,  LOCKWOOD GREGORY T ,  GRIFFO ANTHONY ,  LIANG DAH-BEN

IPC: B22F3/15 ,  C22C29/00 ,  C22C29/06 ,  E21B10/52

公开(公告)号：GB2385814B

公开(公告)日：2004-05-19

申请号：GB0304389

申请日：2003-02-26

Applicant: SMITH INTERNATIONAL

Inventor： GRIFFO ANTHONY

IPC: E21B10/50 ,  B21D5/02

公开(公告)号：CA2419928A1

公开(公告)日：2003-08-27

申请号：CA2419928

申请日：2003-02-25

Applicant: SMITH INTERNATIONAL

Inventor： GRIFFO ANTHONY

IPC: E21B10/50 ,  B23P15/28 ,  E21B10/46

Abstract: A drill bit including a bit body having at least one roller cone rotatab ly coupled to the bit body with a plurality of milled teeth formed on the at least one roller cone is disclosed. At least one milled tooth is arranged so as to for m a gage row milled tooth, and the gage row milled tooth includes hardfacing thereon. A cutting element insert is mounted in a gage face of the gage row milled toot h. A method of forming a drill bit structure, the method including machining at least one hole in a preselected location on a gage surface of at least one milled tooth, positioning a plug in the at least one hole, applying a hardfacing material to the at least one milled tooth, removing the plug from the at least one hole, and positioning a drilling insert in the at least one hole is also disclosed.

公开(公告)号：GB2365025A

公开(公告)日：2002-02-13

申请号：GB0110660

申请日：2001-05-01

Applicant: SMITH INTERNATIONAL

Inventor： FANG ZHIGANG ,  DENTON ROBERT ,  GRIFFO ANTHONY

IPC: B22F7/06 ,  C23C30/00 ,  E21B10/52 ,  E21B10/46

Abstract: A rock bit insert 13 made of a cermet (e.g. cemented WC) has a wear resistant coating formed by making a conformable mixture of one or more powders selected from cermets, carbides, borides, nitrides, carbonitrides and refractory metals with an applying agent (e.g. a polymer binder), conforming and applying the mixture onto a surface of the insert 13 and sintering the mixture by pressurising it at elevated temperature (e.g. pressed omnidirectionally at a pressure in the range 10-120 ksi, at a temperature in the range 1000-1500{C). The mixture may be applied to the insert in the form of a slurry or a green body shaped to complement the surface of the insert 13, which may be curved. There may be at least one intermediate layer present between the insert 13 and the wear resistant coating. The insert 13 may be in either in presintered or fully densified form when the mixture is applied.