Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1986-03-24
1988-01-19
Suchfield, George A.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175339, 175379, 175410, E21B 1046, E21B 1060
Patent
active
047199792
ABSTRACT:
Drag-type drilling bits are disclosed which have at least one blade and a plurality of fluid flow channels incorporated in the blade for conducting drilling fluid or drilling mud from the hollow interior of the bit to discharge or ejection ports located in the front cutting edge of the blade. Rods of diamonds or of like "hard" cutter insert materials are incorporated in the blade in such a configuration that as the blade wears away or erodes and small pieces of diamonds are lost during drilling, more diamonds are exposed to the formation for drilling. During erosion or wear of the blades, the fluid discharge ports continue to operate to eject drilling fluid adjacent to substantially each diamond rod, whereby the flushing away of cuttings and cooling of the diamonds is greatly improved. In some embodiments of the invention rods of alternating hard and soft materials are also disposed substantially parallel with the diamond or like "hard" cutter insert rods. When the soft material of the rods is exposed for drilling the formation, kerfs are formed which are thereafter "chipped away" by the subsequently exposed hard material of the rods.
REFERENCES:
patent: 3768581 (1973-10-01), Rederon
patent: 3938599 (1976-02-01), Horn
patent: 4221270 (1980-09-01), Vezirian
patent: 4234048 (1980-11-01), Rowley
patent: 4246977 (1981-01-01), Allen
patent: 4253533 (1981-03-01), Baker, III
patent: 4265324 (1981-05-01), Morris et al.
patent: 4303136 (1981-12-01), Ball
patent: 4325439 (1982-04-01), Vezirian
patent: 4334585 (1982-06-01), Upton
patent: 4350215 (1982-09-01), Radtke
patent: 4440247 (1984-04-01), Sartor
patent: 4475606 (1984-10-01), Crow
patent: 4494618 (1985-01-01), Radtke
patent: 4499958 (1985-02-01), Radtke et al.
patent: 4505342 (1985-03-01), Barr et al.
patent: 4533004 (1985-08-01), Ecer
patent: 4538690 (1985-09-01), Short, Jr.
patent: 4538691 (1985-09-01), Dennis
patent: 4539018 (1985-09-01), Whanger et al.
"Rock-Bit Design, Selection and Evaluation", by H. G. Bentson, Smith Tool, Div. of Smith International, Inc., revised reprint of presentation at spring meeting of Pacific Coast District, API Division of Production, Los Angeles, May, 1956, printed in Aug., 1966.
Smith International Inc.
Suchfield George A.
Upton Robert G.
LandOfFree
Expendable diamond drag 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 Expendable diamond drag bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expendable diamond drag bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-368094