Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1993-07-08
1994-10-04
Neuder, William P.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175371, E21B 1000
Patent
active
053517687
ABSTRACT:
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface intersecting a heel surface. A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter and include a heel row of heel inserts on the heel surface of the cutter and a gage row of gage inserts on the gage surface of the cutter. At least one scraper insert, formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces. The scraper insert includes a gage and a heel insert surface. The gage and heel surfaces of the scraper insert converge to define a cutting edge for engagement with the sidewall of the borehole, the insert surface defining a positive rake angle with respect to the sidewall of the borehole of between 0 and 15 degrees. The cutting edge projecting from the heel surface an amount not greater than the lesser of one-half the projection of the heel inserts from the heel surface and 30% of the pitch between the heel inserts.
REFERENCES:
patent: 2804282 (1957-08-01), Spengler, Jr. et al.
patent: 2990025 (1961-06-01), Talbert et al.
patent: 3401759 (1968-09-01), White
patent: 3952815 (1976-04-01), Dysart
patent: 4832139 (1989-05-01), Minikus et al.
patent: 4940099 (1990-07-01), Deane et al.
patent: 5201376 (1993-04-01), Williams
patent: 5287936 (1994-02-01), Grimes et al.
Grimes Robert E.
Isbell Matthew R.
Pessier Rudolf C. O.
Scott Danny E.
Baker Hughes Incorporated
Felsman Robert A.
Neuder William P.
Perdue Mark D.
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