Rock drill bit with back-reaming protection

Details Rock drill bit with back-reaming protection Rock drill bit with back-reaming protection

1997-09-09

2000-09-12

Dang, Hoang

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

With fluid pressure-actuated feed means

175340, 175374, 175406, 175401, E21B 1018, E21B 1022

Patent

active

061163570

ABSTRACT:
A drill bit for boring a bore hole in an earthen formation comprises: a bit body having a pin end, a cutting end and a longitudinal bit axis and including at least two legs extending from the cutting end, each of the legs including a bearing that rotatably supports a cutter cone. The bit body further includes a fluid flow system, including a flowway in said pin end that is in fluid communication with at least one exit port in the cutting end, the exit port being defined by a nozzle boss and disposed adjacent one of the legs. Each of the legs includes a leading side surface, a trailing side surface, and a center panel, and at least one of said legs is asymmetric such that its trailing side surface is larger than its leading side surface. The present bit can also include a lubricant system that has its opening in the trailing side of the leg, and can further include various wear resistant coatings and inserts on its surface.

REFERENCES:
patent: Re32495 (1987-09-01), Coates
patent: 1909128 (1933-05-01), Scott et al.
patent: 2807444 (1957-09-01), Reifschneider
patent: 3007751 (1961-11-01), Eenink
patent: 3230019 (1966-01-01), Kotch et al.
patent: 3230020 (1966-01-01), Gilbert et al.
patent: 3299973 (1967-01-01), Swart et al.
patent: 3463270 (1969-08-01), Lundstrom et al.
patent: 3476195 (1969-11-01), Galle
patent: 3719241 (1973-03-01), Bell
patent: 3721306 (1973-03-01), Sartor
patent: 3735825 (1973-05-01), Keller
patent: 3739864 (1973-06-01), Cason, Jr. et al.
patent: 3744580 (1973-07-01), Crow
patent: 3841422 (1974-10-01), Crow
patent: 3844364 (1974-10-01), Crow
patent: 3847234 (1974-11-01), Schumacher, Jr. et al.
patent: 3866695 (1975-02-01), Jackson
patent: 3917028 (1975-11-01), Garner
patent: 4012238 (1977-03-01), Scales
patent: 4014595 (1977-03-01), Dolezal
patent: 4019785 (1977-04-01), Stinson et al.
patent: 4055225 (1977-10-01), Millsapps
patent: 4102419 (1978-07-01), Klima
patent: 4199856 (1980-04-01), Farrow et al.
patent: 4274498 (1981-06-01), Penny
patent: 4276946 (1981-07-01), Millsapps, Jr.
patent: 4284151 (1981-08-01), Levefelt
patent: 4372624 (1983-02-01), Neilson
patent: 4386667 (1983-06-01), Millsapps, Jr.
patent: 4386668 (1983-06-01), Parish
patent: 4390072 (1983-06-01), Phelan
patent: 4399878 (1983-08-01), Karlsson et al.
patent: 4414734 (1983-11-01), Atkinson
patent: 4428442 (1984-01-01), Steinke
patent: 4428687 (1984-01-01), Zahradnik
patent: 4453836 (1984-06-01), Klima
patent: 4512669 (1985-04-01), Moore
patent: 4513829 (1985-04-01), Coates
patent: 4577705 (1986-03-01), Cross
patent: 4591008 (1986-05-01), Oliver
patent: 4593775 (1986-06-01), Chaney et al.
patent: 4597455 (1986-07-01), Walters et al.
patent: 4793719 (1988-12-01), Crockett et al.
patent: 4981182 (1991-01-01), Dysart
patent: 4989680 (1991-02-01), Deane et al.
patent: 5027911 (1991-07-01), Dysart
patent: 5148879 (1992-09-01), Hopper
patent: 5161898 (1992-11-01), Drake
patent: 5415243 (1995-05-01), Lyon et al.
patent: 5441120 (1995-08-01), Dysart
Smith Tool; Feature Bulletin; Feature Leg Back Protection; Exhibits 2-6; date: prior to filing of present application.
Sandvik Rock Tools; Raise Boring Equipment; Exhibits 7A and 7B; date: prior to filing of present application.

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