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1. WO1992014906 - IMPROVEMENTS RELATING TO DRILL BITS

Publication Number WO/1992/014906
Publication Date 03.09.1992
International Application No. PCT/GB1992/000321
International Filing Date 21.02.1992
Chapter 2 Demand Filed 22.09.1992
IPC
E21B 10/56 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
10Drill bits
46characterised by wear resisting parts, e.g. diamond inserts
56Button-type inserts
CPC
E21B 10/5673
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
10Drill bits
46characterised by wear resisting parts, e.g. diamond inserts
56Button-type inserts
567with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
5673having a non planar or non circular cutting face
Applicants
  • BRIT BIT LIMITED [GB]/[GB] (AllExceptUS)
  • SIMPSON, Neil, Andrew, Abercrombie [GB]/[GB] (UsOnly)
  • BAIN, James [GB]/[GB] (UsOnly)
Inventors
  • SIMPSON, Neil, Andrew, Abercrombie
  • BAIN, James
Agents
  • PACITTI, Pierpaolo, A., M., E.
Priority Data
9103828.123.02.1991GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVEMENTS RELATING TO DRILL BITS
(FR) AMELIORATIONS RELATIVES A DES OUTILS DE FORAGE
Abstract
(EN)
A polycrystalline diamond cutter (PDC) (12) is described which is elliptical or oval, rather than circular, in shape, having a major axis which extends outwardly from the drill bit body (10) when in use. The elliptical or oval shape of the PDC provides advantages in terms of the rate of development of the wear flat, the weight on bit requirement, and the useful cutting area and cooling characteristics of the PDC in comparison with circular configurations. The PDC's may be post mounted. Drill bits incorporating the PDC and methods of forming suitable bit bodies and mounting posts are also described.
(FR)
On décrit une couronne à diamant polycristallin (CDP) (12) de forme elliptique ou ovale plutôt que circulaire, et dont un axe majeur s'étend vers l'extérieur à partir du corps (10) du foret lorsqu'elle est utilisée. La forme elliptique ou ovale de la CDP présente des avantages en ce qui concerne la vitesse de développement du plan d'usure, la charge sur l'outil requise, et la zone de coupe utile ainsi que les caractéristiques de refroidissement de la CDP par rapport aux configurations circulaires. La CDP peut être fixée sur un montant. Des outils de forage comprenant la CDP, et des procédés de fabrication de corps d'outils et de montants sont aussi décrits.
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