Cutting and drilling apparatus with threadably attached compacts

Details Cutting and drilling apparatus with threadably attached compacts Cutting and drilling apparatus with threadably attached compacts

1978-04-24

1980-04-22

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175413, E21B 1301

Patent

active

041990358

ABSTRACT:
An apparatus for rock cutting and drilling. A preferred embodiment of the apparatus is a drill bit comprised of composite compact cutters removably secured or attached to the drill crown. The cutter is preferably comprised of a stud or pin with an abrasive composite compact bonded at one end of the stud. The securing means for the cutter is comprised of a sleeve and a bushing fixed in the recess of the bit crown. The sleeve has a threaded outer wall for engagement with a threaded inner wall of the bushing. The height of the cutter is adjustable by the provision of metal shims between the bottom of the recess and the base of the stud of the cutter.

REFERENCES:
patent: 861368 (1907-07-01), Juengst
patent: 1351003 (1920-08-01), Pace
patent: 1550172 (1925-08-01), Korber
patent: 2950090 (1960-08-01), Swart
patent: 3734213 (1973-05-01), Goodfellow
patent: 3743489 (1973-07-01), Wentorf, Jr. et al.
patent: 3771612 (1973-11-01), Adcock
patent: 4014395 (1977-03-01), Pearson
patent: 4071097 (1978-01-01), Fulop et al.
patent: 4073354 (1978-02-01), Rowley et al.

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