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1. WO1996005402 - DIRECTION CONTROLLABLE SUBSURFACE BOREHOLE TOOL

Publication Number WO/1996/005402
Publication Date 22.02.1996
International Application No. PCT/US1995/006681
International Filing Date 26.05.1995
Chapter 2 Demand Filed 27.03.1996
IPC
E21B 7/06 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
7Special methods or apparatus for drilling
04Directional drilling
06Deflecting the direction of boreholes
E21B 7/20 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
7Special methods or apparatus for drilling
20Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
CPC
E21B 7/062
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
7Special methods or apparatus for drilling
04Directional drilling
06Deflecting the direction of boreholes
062the tool shaft rotating inside a non-rotating guide travelling with the shaft
E21B 7/067
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
7Special methods or apparatus for drilling
04Directional drilling
06Deflecting the direction of boreholes
067with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub
E21B 7/20
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
7Special methods or apparatus for drilling
20Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Applicants
  • HALE, Robert, G. [US/US]; US
Inventors
  • HALE, Robert, G.; US
Agents
  • RHEA, Robert, K.; Suite 305 5350 S. Western Oklahoma City, OK 73109, US
Priority Data
08/287,44908.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DIRECTION CONTROLLABLE SUBSURFACE BOREHOLE TOOL
(FR) OUTIL DE FORAGE SOUTERRAIN ORIENTABLE
Abstract
(EN)
A drilling head (12) for making a borehole (18) along a predetermined underground path is formed by a tubular body (22) having a guidable rotary drilling sub normally axially mounted in the body by means of a sleeve bearing (36) journalling a drill bit (40) equipped rotary drilling string sub joint moveable with and within the sleeve bearing for disposing the drilling bit (40) on a predetermined angle in a predetermined direction relative to the longitudinal axis of the body (22) by means of diametrically opposite superposed pairs of wedges (28-29), (30-31) interposed between respective end portions of the sleeve bearing and the inner periphery of the body.
(FR)
Une tête de forage (12) servant à percer un trou (18) le long d'une voie souterraine prédéterminée est formée d'un corps tubulaire (22) doté d'un raccord de perçage rotatif, orientable, monté axialement et perpendiculairement dans le corps au moyen d'un palier à douille (36) faisant tourbillonner un foret (40) pourvu d'un joint de raccord de tige rotatif pouvant se déplacer avec et dans le palier à douille, ceci afin de positionner le foret (40) à un angle prédéterminé, dans un sens prédéterminé par rapport à l'axe longitudinal du corps (22) à l'aide de paires superposées, diamétralement opposées, de clavettes (28-29, 30-31) intercalées entre des sections terminales respectives du palier à douille et la périphérie interne du corps.
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