Processing

Please wait...

Settings

Settings

1. WO1996003567 - FIXED-CUTTER DRILL BIT ASSEMBLY AND METHOD

Publication Number WO/1996/003567
Publication Date 08.02.1996
International Application No. PCT/US1995/009985
International Filing Date 26.07.1995
Chapter 2 Demand Filed 16.01.1996
IPC
E21B 10/42 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
42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
E21B 10/46 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
E21B 10/60 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
60characterised by conduits or nozzles for drilling fluids
CPC
E21B 10/43
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
10Drill bits
42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
43characterised by the arrangement of teeth or other cutting elements
E21B 10/46
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
10Drill bits
46characterised by wear resisting parts, e.g. diamond inserts
E21B 10/60
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
10Drill bits
60characterised by conduits or nozzles for drilling fluids
Applicants
  • FLOWDRIL CORPORATION [US/US]; 21414 -68th Avenue South Kent, WA 98032, US
Inventors
  • O'HANLON, Thomas, Allen; US
Agents
  • HUGHES, Robert, B.; Hughes, Multer & Schacht, P.S. 1720 Iowa Street Bellingham, WA 98226, US
Priority Data
08/282,07528.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FIXED-CUTTER DRILL BIT ASSEMBLY AND METHOD
(FR) OUTIL ET PROCEDE DE FORAGE A TREPANS FIXES
Abstract
(EN)
A drill bit assembly (70) comprising a plurality of cutter units (72), with each cutter unit comprising a circumferentially forward, relatively blunt positioning cutter (78), followed by a fixed cutter (82) having a relatively sharp cutting edge (96), with the cutting edge (96) of the following cutter (82) being positioned a predetermined distance(s) below an operating position of the positioning cutter (78) is controlled by the positionning cutter (78) locating the drill bit assembly (70) against the hole end wall from which material is being cut. Also, additional fixed cutters (83) can be provided in circumferential alignment in said cutting units (72), and liquid jet cutters (80) can be used in combination with said cutting units (72).
(FR)
Outil de forage (70) comprenant une pluralité d'ensembles de trépans (72). Chaque ensemble de trépans comprend un trépan de positionnement relativement émoussé (78), suivi d'un trépan fixe (82) présentant un bord de coupe relativement tranchant (96). Le bord de coupe (96) du trépan suivant (82) est positionné à une distance prédéterminée au-dessous d'une position de fonctionnement du trépan de positionnement (78) et est contrôlé par ce dernier qui place l'outil de forage (70) contre la paroi d'extrémité du trou dont on extrait le matériau. En outre, des trépans fixes supplémentaires (83) peuvent être prévus en alignement circonférentiel dans lesdits ensembles de trépans (72) et des trépans à jet de liquide (80) peuvent être utilisés en association avec ces ensembles de trépans (72).
Also published as
Latest bibliographic data on file with the International Bureau