Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1979-10-17
1980-12-30
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175 53, 175374, E21B 1010, E21B 1020, E21B 1052
Patent
active
042417996
ABSTRACT:
A large diameter earth boring drill bit has a cutter mounting system that protects the cutter mounts from formation damage. The drill bit is of the type having a cutter support plate adapted to be secured to a string of drill pipe. A cutter shell is rotatably mounted on a bearing carrier and supported by a cutter mount that is secured to the cutter support plate. The cutter mount has two legs spaced apart, each leg having a slot for receiving a lug that extends from each end of the bearing carrier. The legs and lugs have apertures, with a wedge connector for insertion through for connecting the bearing carrier to the cutter mount. A protector member extends from at least one end of the bearing carrier, with the lug extending from the protector member into the slot. The protector member has a surface on each side of the lug that extends over and protects the end of the leg on each side of the slot from formation damage.
REFERENCES:
patent: 2215264 (1940-09-01), Fisher
patent: 2325459 (1943-07-01), Zublin
patent: 3747999 (1973-07-01), Justman
patent: 3750772 (1973-08-01), Venter
patent: 3921734 (1975-11-01), Goodfellow
patent: 4089382 (1978-05-01), Pessier
Felsman Robert A.
Hughes Tool Company
Novosad Stephen J.
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