Title:
DRILLING APARATUS
Document Type and Number:
WIPO Patent Application WO2004099550
Kind Code:
B1
Abstract:
A drilling apparatus (10) for earth boring operations is of the type having cutter blades (17, 18) mounted on a support body (12, 72, 82) at the lower end of a drill string and includes a novel arrangement of fluid bore sections (15, 23, 23', 63, 64, 65', 92) for delivering fluid under pressure into fluid discharge passages (50, 52) in each of the blades and a bifurcated pivotal mounting portion (16, 74, 91) on the body which enables the bore sections to supply fluid to the cutter blades through a ball joint (22) on the pivotal axis. Modified forms of invention are specifically designed for cutter blades which are intended to perform reaming operations but include the fluid delivery system as well as an extended delivery system (86) for delivering fluid under pressure to other tools in the drill string.
Application Number:
PCT/US2004/013294
Publication Date:
May 06, 2005
Filing Date:
April 29, 2004
Export Citation:
Assignee:
NACKERUD ALAN L (US)
International Classes:
E21B7/18; E21B7/28; E21B10/32; E21B10/34; E21B10/62; E21B; (IPC1-7): E21B7/28; E21B7/18; E21B10/62
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