Rotary drill bit

Details Rotary drill bit Rotary drill bit

1982-03-25

1984-09-18

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1056

Patent

active

044718454

ABSTRACT:
Cutting elements, for example of polycrystalline sintered diamond, the cutting faces of which are set differently to the cutting direction, are disposed on a rotary drill bit. One group of cutting elements has its cutting faces substantially perpendicular to the cutting direction (straight set cutting elements) while other groups of cutting elements are at an acute angle to the cutting direction (obliquely set cutting elements).
Because of their greater pressure per unit area, the obliquely set cutting elements penetrate more easily into plastic formations and can tear these up. The straight set cutting elements, which do not develop a great pressure per unit area, but work over a wider range, can better pare off the formation prepared by the obliquely set cutting elements.

REFERENCES:
patent: 883137 (1908-03-01), Karns
patent: 977955 (1910-12-01), Karns
patent: 2960312 (1960-11-01), Kandle
patent: 3709308 (1973-01-01), Rowley et al.
patent: 4246977 (1981-01-01), Allen
patent: 4350215 (1982-09-01), Radtke
patent: 4351401 (1982-09-01), Fielder

Affiliated with

Also associated with

Rating

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.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-789448