Boring or penetrating the earth – With bit wear signal generating
Patent
1986-08-29
1988-03-15
Novosad, Stephen J.
Boring or penetrating the earth
With bit wear signal generating
175371, 384 96, E21B 1022, E21B 1202
Patent
active
047306815
ABSTRACT:
A cutting cone on a rotary rock bit is captively retained on a journal pin by an annular array of ball bearings disposed in laterally facing annular races formed in the cone and pin. When a predetermined amount of surface wear has occurred between the cone and pin as the bit is operated, one or more of the balls is caused to axially shift into and become trapped in a small lockup grooved formed in the journal pin and communicating with its race. Other balls become wedged between the trapped balls and the cone, thereby rotationally locking the cone on its pin and preventing further pin-cone surface wear which might otherwise cause cone loss. During operation of the bit, the locked cone produces a readily detectable increase in rotary table torque, and a decrease in bit penetration rate, thereby signalling the driller that the bit needs replacement.
REFERENCES:
patent: 2885185 (1959-05-01), Sartor
patent: 3207241 (1965-09-01), Neilson
patent: 3381968 (1968-05-01), Neilson
patent: 3489421 (1970-01-01), Neilson
patent: 3581564 (1971-06-01), Young, Jr.
patent: 3656764 (1972-04-01), Robinson
patent: 3678883 (1972-07-01), Fischer
patent: 3680873 (1972-08-01), Garner
patent: 3721306 (1973-03-01), Sartor
patent: 3823789 (1974-07-01), Garner
patent: 3853184 (1974-12-01), McCullough
patent: 3917361 (1975-11-01), Murdoch
patent: 4006788 (1977-02-01), Garner
patent: 4021084 (1977-05-01), Garner
patent: 4061376 (1977-12-01), Villaloboz
patent: 4067406 (1978-01-01), Garner et al.
patent: 4068731 (1978-01-01), Garner et al.
patent: 4150728 (1979-04-01), Garner et al.
patent: 4161223 (1979-07-01), Oelke
patent: 4181377 (1980-01-01), Oelke
patent: 4185706 (1980-01-01), Baker, III et al.
patent: 4189014 (1980-02-01), Allen et al.
patent: 4193464 (1980-03-01), Dixon
patent: 4204437 (1980-05-01), Espana
patent: 4235295 (1980-11-01), Zyglewyz
patent: 4276946 (1981-07-01), Millsapps, Jr.
Melius Terry Lee
Novosad Stephen J.
Rock Bit Industries U.S.A., Inc.
Tucker L. Dan
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