Rotary drill bit with improved cutter and method of manufacturin

Metal tools and implements – making – Blank or process – Drill

Patent

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Details

175371, 175432, 175434, B21K 502, F21B 1008

Patent

active

056449569

ABSTRACT:
A rotary cone drill bit for forming a borehole having a body with an underside and an upper end portion adapted for connection to a drill string. The drill bit rotates around a central axis of the body. A number of angularly-spaced arms are integrally formed with the body and depend therefrom. Each arm has an inside surface with a spindle connected thereto and an outer shirttail surface. Each spindle projects generally downwardly and inwardly with respect to its associated arm, has a generally cylindrical upper end portion connected to the associated inside surface, and has an inner sealing surface on the upper end portion. A number of rotary cone cutters equal to the number of arms are each mounted on respective spindles. Each of the cutters includes an internal generally cylindrical wall defining a cavity for receiving the respective spindle, a gap with a generally cylindrical portion defined between the spindle and cavity wall, an outer sealing surface in the cavity wall concentric with the inner sealing surface, and a seal element spanning the gap and sealing between the inner and outer sealing surfaces. The gap includes an opening contiguous with and directed outwardly from the shirttail surface. A shirttail tip may be included to form a generally planar second portion of the gap defined between the inside surface and the cutter, the second portion substantially perpendicular to the first portion. The rotary cone cutters are preferably composites formed from different types of material.

REFERENCES:
patent: 2234197 (1941-03-01), Reed
patent: 2907551 (1959-10-01), Peter
patent: 2939684 (1960-06-01), Payne
patent: 3389761 (1968-06-01), Ott
patent: 3497942 (1970-03-01), Weiss
patent: 3888405 (1975-06-01), Jones, et al.
patent: 3990525 (1976-11-01), Penny
patent: 4037673 (1977-07-01), Justman
patent: 4054426 (1977-10-01), White
patent: 4067490 (1978-01-01), Jones, et al.
patent: 4098150 (1978-07-01), Penny et al.
patent: 4098358 (1978-07-01), Klima
patent: 4102419 (1978-07-01), Klima
patent: 4249622 (1981-02-01), Dysart
patent: 4280571 (1981-07-01), Fuller
patent: 4398952 (1983-08-01), Drake
patent: 4562892 (1986-01-01), Ecer
patent: 4593776 (1986-06-01), Salesky et al.
patent: 4597456 (1986-07-01), Ecer
patent: 4630692 (1986-12-01), Ecer
patent: 4679640 (1987-07-01), Crawford
patent: 4688651 (1987-08-01), Dysart
patent: 4726432 (1988-02-01), Scott et al.
patent: 4814254 (1989-03-01), Naito et al.
patent: 4938991 (1990-07-01), Bird
patent: 5131480 (1992-07-01), Lockstedt et al.
patent: 5279374 (1994-01-01), Sievers et al.
patent: 5341890 (1994-08-01), Cawhorne et al.
patent: 5348770 (1994-09-01), Sievers et al.
Rock Bits Diamond Products Drilling Tools, Security Oilfield Catalog, 40 pages (undated).
Security Sales Literature, A Totally New Rock Bit Bearing System, 10 pages (undated)--cited in parent case and copy in that file history.

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