公开(公告)号：CA2455716C

公开(公告)日：2011-04-19

申请号：CA2455716

申请日：2004-01-21

Applicant: SMITH INTERNATIONAL

Inventor： KEMBAIYAN KUMAR T ,  OLDHAM THOMAS W ,  ZHANG JOHN YOUHE

IPC: E21B10/50 ,  E21B10/00 ,  E21B10/42

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 0.5 percent by weight silicon, and one or more microalloying element selected from the group consisting of vanadium, niobium, titanium, zirconium, aluminum and mixtures thereof.

公开(公告)号：CA2598143C

公开(公告)日：2011-02-08

申请号：CA2598143

申请日：2007-08-20

Applicant: SMITH INTERNATIONAL

Inventor： LOCKSTEDT ALAN W ,  OLDHAM THOMAS W

IPC: E21B10/55 ,  B23B51/00 ,  B23B51/02 ,  B23P15/32 ,  E21B10/42 ,  E21B10/43 ,  E21B10/54

Abstract: A drill bit that includes a steel 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; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.

公开(公告)号：GB2467216B

公开(公告)日：2010-11-17

申请号：GB201000525

申请日：2007-08-29

Applicant: SMITH INTERNATIONAL

Inventor： LOCKSTEDT ALAN W ,  OLDHAM THOMAS W

IPC: E21B10/55 ,  E21B10/46

Abstract: A drill bit that includes a steel 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; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.

公开(公告)号：GB2464866B

公开(公告)日：2010-08-04

申请号：GB201001703

申请日：2005-09-21

Applicant: SMITH INTERNATIONAL

Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

IPC: E21B10/46 ,  B22F7/00 ,  B22F7/06 ,  C22C26/00 ,  E21B10/567

公开(公告)号：GB2464863B

公开(公告)日：2010-07-28

申请号：GB201001690

申请日：2005-09-21

Applicant: SMITH INTERNATIONAL

Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

IPC: E21B10/46 ,  B22F7/00 ,  B22F7/06 ,  C22C26/00 ,  E21B10/567

公开(公告)号：GB2434590B

公开(公告)日：2009-07-08

申请号：GB0701738

申请日：2007-01-30

Applicant: SMITH INTERNATIONAL

Inventor： LIANG DAH-BEN ,  GRIFFO ANTHONY ,  OLDHAM THOMAS W ,  LOCKWOOD GREGORY T

IPC: C22C29/08 ,  E21B10/00

公开(公告)号：GB2427215B

公开(公告)日：2008-09-17

申请号：GB0610460

申请日：2006-05-26

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART N ,  BELNAP J DANIEL ,  MOURIK NEPHI ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

IPC: E21B10/46 ,  C22C26/00 ,  E21B10/52 ,  E21B10/56

Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750° C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra-hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body together by high pressure/high temperature process.

公开(公告)号：GB2443574A

公开(公告)日：2008-05-07

申请号：GB0801250

申请日：2005-10-10

Applicant: SMITH INTERNATIONAL

Inventor： LOCKWOOD GREGORY T ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY ,  KESHAVEN MADAPUSI K ,  CONROY DAVID A

IPC: E21B10/46 ,  C22C26/00

Abstract: An insert for a drill bit is formed from diamond particles impregnated in a metal carbide matrix material. The diamond particles have a contiguity of 15%or less. The diamond particles can be of two different sizes and the metal carbide may include tungsten carbide, cast tungsten carbide, or sintered tungsten carbide-cobalt.

公开(公告)号：CA2548247A1

公开(公告)日：2006-11-26

申请号：CA2548247

申请日：2006-05-26

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART N ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY ,  BELNAP J DANIEL ,  MOURIK NEPHI

IPC: C04B35/575 ,  C04B35/645

Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra- hard material body that includes a thermally stable region positioned adjace nt a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750.degree.C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra- hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body togeth er by high pressure/high temperature process.

公开(公告)号：GB2418215A

公开(公告)日：2006-03-22

申请号：GB0519211

申请日：2005-09-21

Applicant: SMITH INTERNATIONAL

Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

IPC: E21B10/56 ,  B22F7/06 ,  E21B10/567

Abstract: Thermally stable diamond constructions 26 comprise a diamond body having a plurality of bonded diamond crystals and interstitial regions disposed among the crystals. A metallic substrate 36 is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region 28 that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region 32 that includes the catalyst material. The diamond body first region extends from the working surface to depth of from 0.02 mm to 0.09 mm. The diamond body includes diamond crystals having an average diamond grain size of greater 0.02 mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.