1
Mahlon D Dennis: Cutting composite formed of cemented carbide substrate and diamond layer. Diamant Boart Stratabit, Burns Doane Swecker & Mathis, June 9, 1992: US05120327 (308 worldwide citation)

A composite for cutting in subterranean formations comprises a cemented carbide substrate and a diamond layer adhered to a surface of the substrate. That surface includes a plurality of spaced apart ridges forming grooves therebetween. The diamond layer has a thickness greater than a depth of the gr ...


2
Mahlon D Dennis: Cutting element having composite formed of cemented carbide substrate and diamond layer and method of making same. Diamant Boart Stratabit, Burns Doane Swecker & Mathis, November 15, 1988: US04784023 (200 worldwide citation)

A cutting element comprises a stud and a composite bonded thereto. The composite comprises a substrate formed of cemented carbide, and a diamond layer bonded to the substrate. The interface between the diamond layer and substrate is defined by alternating ridges of diamond and cemented carbide which ...


3
Mats G Waldenstrom, Udo K R Fischer, Lars H Hillert, Mahlon D Dennis: Tools for cutting rock drilling. Sandvik, Diamant Boart Stratabit, Burnes Doane Swecker & Mathis, June 8, 1993: US05217081 (105 worldwide citation)

The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert is provided with one or more bodies or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area.


4
Mats G Waldenstrom, Udo K R Fisher, Lars H Hillert, Mahlon D Dennis: Diamond tools for rock drilling, metal cutting and wear part applications. Sandvik, Diamant Boart Stratabit, Burns Doane Swecker & Mathis, November 23, 1993: US05264283 (98 worldwide citation)

The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in the diamond ...


5
Mats G Waldenstrom, Udo K R Fischer, Lars H Hillert, Mahlon D Dennis: Diamond tools for rock drilling, metal cutting and wear part applications. Sandvik, Diamant Boart Stratabit, Burns Doane Swecker & Mathis L, April 29, 1997: US05624068 (78 worldwide citation)

The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in the diamond ...


6
Rene Deschutter: Drilling tool intended to widen a well. Diamant Boart Stratabit, Browning Bushman Anderson & Brookhart, August 30, 1994: US05341888 (47 worldwide citation)

The drilling tool (1) intended to widen a drilling well bears a series of helical arms (3) resting at a first end on a first fixed flange (4) so as to be able to turn on themselves by a portion of a turn under the control of a rotating ring (9) driven by an opening mechanism (10) controlled by a var ...


7
Waldenstroem Mats, Fischer Udo, Hillert Lars, Dennis Mahlon: Improved tools for cutting rock drilling.. Sandvik, Diamant Boart Stratabit, December 27, 1991: EP0462955-A1 (43 worldwide citation)

The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert (1) is provided with one or more bodies (3) or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area. The body ef cemented carbide has a mu ...


8
David E Young, Earl T Koskie Jr, Andrew R Easton: Coring tool. Diamant Boart Stratabit, Burns Doane Swecker & Mathis, June 5, 1990: US04930587 (35 worldwide citation)

A coring tool comprises a core cutting section and an actuating section disposed thereabove. The core cutting section includes axially telescoping outer and inner barrels. The inner barrel includes a jaw carrier which carries pivotable core-catching jaws normally covered along their radially inner s ...


9
Stephen G Southland: Diamond cutting element. Diamant Boart Stratabit, Burns Doane Swecker & Mathis, August 1, 1989: US04852671 (33 worldwide citation)

A rotary drill bit contains a plurality of cutting elements. Each cutting element includes a stud and a cutting disk mounted on the stud. The cutting disk comprises a substrate and a diamond layer bonded to the substrate. The cutting disk comprises a relief formed in an outer peripheral edge of the ...


10
Graham Clydesdale: Corebarrel. Diamant Boart Stratabit, Ratner & Prestia, May 11, 1993: US05209310 (33 worldwide citation)

A system is described which enables the safe release of formation gases when corebarrel is being raised. A corebarrel has an elongate cylindrical outer casing (1) and an elongate cylindrical liner (2), the liner (2) being disposed within the outer casing (1) such that there is a space (3) between th ...