Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1996-06-21
1998-09-29
Tsay, Frank
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175431, E21B 1008
Patent
active
058134859
ABSTRACT:
A cutter element having a substantially flat wear face and leading and trailing sections, wherein the leading section is sharper than the trailing section. Sharpness is defined as either a smaller inside angle at the intersection of a pair of planes or as a smaller radius of curvature. The insert of the present invention experiences reduced stress on its trailing portion and therefore is less subject to extreme wear and failure. The present invention can be applied with particular advantage to heel row cutters, but can also be applied to cutters in other rows that primarily ream the borehole wall. The present cutter element can be constructed so as to have either a positive or negative rake angle at its leading section, or to have any of a variety of shapes, depending on the characteristics of the formation in which it is to be used.
REFERENCES:
patent: 3401759 (1968-09-01), White
patent: 4058177 (1977-11-01), Langford, Jr. et al.
patent: 4108260 (1978-08-01), Bozarth
patent: 4334586 (1982-06-01), Schumacher
patent: 4604106 (1986-08-01), Hall et al.
patent: 4629373 (1986-12-01), Hall
patent: 4694918 (1987-09-01), Hall
patent: 4811801 (1989-03-01), Salesky et al.
patent: 4832139 (1989-05-01), Minikus et al.
patent: 5145016 (1992-09-01), Estes
patent: 5172777 (1992-12-01), Siracki et al.
patent: 5172779 (1992-12-01), Siracki et al.
patent: 5197555 (1993-03-01), Estes
patent: 5201376 (1993-04-01), Williams
patent: 5287936 (1994-02-01), Grimes et al.
patent: 5322138 (1994-06-01), Siracki
patent: 5323865 (1994-06-01), Isbell et al.
patent: 5341890 (1994-08-01), Cawthorne et al.
patent: 5346026 (1994-09-01), Pessier et al.
patent: 5351768 (1994-10-01), Scott et al.
patent: 5351770 (1994-10-01), Cawthorne et al.
patent: 5353885 (1994-10-01), Hooper et al.
patent: 5407022 (1995-04-01), Scott et al.
patent: 5415244 (1995-05-01), Portwood
patent: 5421423 (1995-06-01), Huffstutler
patent: 5421424 (1995-06-01), Portwood et al.
patent: 5479997 (1996-01-01), Scott et al.
patent: 5592995 (1997-01-01), Scott et al.
Smith International Inc.
Tsay Frank
LandOfFree
Cutter element adapted to withstand tensile stress does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cutter element adapted to withstand tensile stress, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutter element adapted to withstand tensile stress will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-678724