E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/68
E21B 10/04 (2006.01)
Patent
CA 1239142
- 1 - ROTARY DRILL BIT ABSTRACT OF THE DISCLOSURE A rotary drill bit includes a cutting face having a peripheral edge and a central recess. A plurality of fluid discharge nozzles are mounted in the cutting face. A plurality of cutter elements are mounted in the peripheral edge and in the recess to fracture an earthen core formed as the drill cuts through a formation. A plurality of lateral discharge passages extend radially through the bit body from said recess and extend longitudinally to the peripheral edge to form circumferential interruptions in the peripheral edge. A convex protrusion is disposed centrally at a longitudinally inner end of the recess and includes a convex deflecting surface arrayed to contact and fracture the earthen core and deflect the cuttings to the lateral discharge passages. A ridge is disposed along a trailing edge of each of the discharge passages to retard the flow of drilling fluid into the associated discharge passage from an adjacent one of the nozzles, whereby such fluid is caused to flow across cutter elements located behind the ridge.
489515
Gowling Lafleur Henderson Llp
Halliburton Energy Services Inc.
LandOfFree
Rotary drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drill bit will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1321420