E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/68
E21B 10/60 (2006.01) E21B 10/56 (2006.01)
Patent
CA 1295321
LARGE COMPACT CUTTER ROTARY DRILL BIT UTILIZING DIRECTED HYDRAULICS FOR EACH CUTTER Abstract of the Disclosure An improved rotating drag bit for cutting plastic, sticky, water reactive and shale formations is devised by providing a plurality of large diamond cutters having a circular cutting face in excess of three-quarter inch in diameter. Each large cutter is provided with at least one hydraulic nozzle which in turn provides a directed hydraulic flow at the corresponding cutter face. The directed hydraulic flow is positioned to apply a force to the chip which tends to peel the chip away from the cutter face. In addition, the hydraulic flow is positioned with respect to the chip so as to apply an off-center torque to the chip which is used to peel the chip away from the cutter face and toward the gage of the bit. In particular, the nozzle defines a jet which is characterized by a direction and velocity of hydraulic fluid determined by the jet characteristics. The core is generally symmetric about its longitudinal axis and has a length along the longitudinal axis and width perpendicular thereto. The point of the jet most distant from the nozzle defines an impact point of the jet against the chip and cutter face. The longitudinal axis of the jet is chosen so that at least a portion of the jet lies between the cutter face and the chip as it is being peeled from the cutter. Hydraulic removal of the chips is further facilitated by a plurality of junk slots having a contoured compound surface. The junk slot is characterized by having at least two distinct cross-sectional profiles, namely an asymmetric profile at its lower portion nearest the bit face and a symmetric profile along its upper portion. The asymmetric and symmetric profiles are connected by a surface providing a smooth hydrodynamic transition.
546521
Eastman Christensen Company
Gowling Lafleur Henderson Llp
Trujillo William R.
LandOfFree
Large compact cutter rotary drill bit utilizing directed... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Large compact cutter rotary drill bit utilizing directed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large compact cutter rotary drill bit utilizing directed... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1280271