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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Mensa-Wilmot; Graham
Address:
Houston, TX
No. of patents:
21
Patents:












Patent Number Title Of Patent Date Issued
7464013 Dynamically balanced cutting tool system December 9, 2008
A method of dynamically balancing a hole enlargement system is disclosed. The method includes modeling the hole enlargement system based on input parameters, simulating the hole enlargement system, adjusting one or more of the input parameters, and repeating the modeling, simulating, and
7159487 Method for making a polycrystalline diamond insert drill bit body January 9, 2007
A method for forming a drill bit body is disclosed which comprises infiltrating powdered tungsten carbide with a binder alloy in a mold. The mold has therein at least one displacement adapted to form a mounting pad for a cutting element. The displacement comprises a substantially cyl
6823952 Structure for polycrystalline diamond insert drill bit body November 30, 2004
A method for forming a drill bit body is disclosed which comprises infiltrating powdered tungsten carbide with a binder alloy in a mold. The mold has therein at least one displacement adapted to form a mounting pad for a cutting element. The displacement comprises a substantially cyl
6808031 Drill bit having large diameter PDC cutters October 26, 2004
A variety of large diameter PDC cutters for use in drill bits are disclosed. Specifically, various PDC cutters having a diameter between 19.0 mm and 25.0 mm are disclosed. The various PDC cutters disclosed include an elliptical PDC cutter, wherein a major diameter of the elliptical c
6729420 Multi profile performance enhancing centric bit and method of bit design May 4, 2004
A novel drill bit includes a cutting reamer portion that cuts to gage diameter, and a pilot portion that cuts to a radius about 50%-80% of the reamer portion. The pilot portion extends downward from the reamer portion to create a distinct cutting area including pilot. The torque and weig
6684967 Side cutting gage pad improving stabilization and borehole integrity February 3, 2004
A drill bit including improved gage pads is particularly adapted for side cutting a borehole wall. In a preferred embodiment, the drill bit gage pads alternate between an active gage pad with a cutting surface portion and a non-active gage pad with a wear-resistant surface. Gage pad cutt
6615934 PDC drill bit having cutting structure adapted to improve high speed drilling performance September 9, 2003
A drill bit is disclosed which includes a bit body having a plurality of blades thereon. The blades have a plurality of cutting elements affixed thereon at selected positions. The cutting elements are disposed into at least two groups. A first one of the groups has at least 60 percent of
6564886 Drill bit with rows of cutters mounted to present a serrated cutting edge May 20, 2003
A fixed cutter drill bit particularly suited for plastic shale drilling includes rows of cutter elements arranged so that the cutting tips of the cutters in a row are disposed at leading and lagging angular positions so as to define a serrated cutting edge. The angular position of the cu
6308790 Drag bits with predictable inclination tendencies and behavior October 30, 2001
A drill bit with dropping tendencies includes an active region, a passive region, a biased mass distribution, an uneven torque generation, and an imbalance force vector directed toward the middle of the active region. Cutting elements in the active region of the drill bit may be more
6253863 Side cutting gage pad improving stabilization and borehole integrity July 3, 2001
A drill bit including improved gage pads is particularly adapted for side cutting a borehole wall. In a preferred embodiment, each gage pad preferably includes a cutting surface portion and a wear-resistant surface. Gage pad cutting elements placed on a first gage pad cutting surface
6164394 Drill bit with rows of cutters mounted to present a serrated cutting edge December 26, 2000
A fixed cutter drill bit particularly suited for plastic shale drilling includes rows of cutter elements arranged so that the cutting tips of the cutters in a row are disposed at leading and lagging angular positions so as to define a serrated cutting edge. The angular position of the cu
6148937 PDC cutter element having improved substrate configuration November 21, 2000
A supporting substrate for supporting a diamond layer on a cutting element is disclosed which has an irregular surface defining the interface between the substrate and the diamond layer. The irregularities in the surface may have varying amplitudes, varying frequencies, or both and can v
5937958 Drill bits with predictable walk tendencies August 17, 1999
A drill bit adapted to walk predictably during drilling is disclosed, comprising: a bit body having a longitudinal axis and a bit face having an active zone and a passive zone, and a plurality of cutters on the bit face, a first portion of said cutters being positioned in the active zone
5906246 PDC cutter element having improved substrate configuration May 25, 1999
A supporting substrate for supporting a diamond layer on a cutting element is disclosed which has an irregular surface defining the interface between the substrate and the diamond layer. The irregularities in the surface comprise closed loops that may vary in amplitude, frequency or both
5833021 Surface enhanced polycrystalline diamond composite cutters November 10, 1998
A polycrystalline diamond cutter having a coating of refractory material applied to the polycrystalline diamond surface increases the operational life of the cutter. The coating typically has a thickness in the range of from 0.1 to 30 .mu.m and may be made from titanium nitride, titanium
5607025 Drill bit and cutting structure having enhanced placement and sizing of cutters for improved bit March 4, 1997
A fixed cutter drill bit includes cutter elements mounted in sets on the bit face. A cutter element set includes at least three cutters with cutting faces having at least two different curvatures. The cutter elements of the set are mounted on various blades of the bit such that, in r
5607024 Stability enhanced drill bit and cutting structure having zones of varying wear resistance March 4, 1997
A fixed cutter drill bit and cutting structure are disclosed which include cutter elements having cutting faces with different abrasion resistances. The cutter elements are spaced apart on the bit face so as to provide a bit cutting profile having abrasion resistance gradients. As wear o
5592996 Drill bit having improved cutting structure with varying diamond density January 14, 1997
A fixed cutter drill bit includes a cutting structure having radially-spaced sets of cutter elements. Each cutter in a set has a cutting profile that, in rotated profile, partially overlaps the cutting profiles of each of the other cutters that are in the same set so as to create a r
5582261 Drill bit having enhanced cutting structure and stabilizing features December 10, 1996
A fixed cutter drill bit includes sets of cutter elements mounted on the bit face, each set including at least two cutters that are mounted at generally the same radial position with respect to the bit axis. The cutter elements of a set are positioned on different blades of the bit and
5551522 Drill bit having stability enhancing cutting structure September 3, 1996
A fixed cutter drill bit includes a cutting structure having radially-spaced sets of cutter elements. The cutter element sets preferably overlap in rotated profile and include at least one low profile cutter element and at least two high profile elements. The low profile element is m
5549171 Drill bit with performance-improving cutting structure August 27, 1996
A fixed cutter drill bit includes sets of cutter elements mounted on the bit face. Each set includes at least two cutters mounted on different blades at generally the same radial position with reset to the bit axis but having differing degrees of backrake. The cutter elements of a set ma










 
 
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