Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1997-09-23
1999-11-09
Dang, Hoang C.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
166 50, 166298, 175426, 175431, E21B 704, E21B 2906, E21B 1046
Patent
active
059795719
ABSTRACT:
A combination metal milling and earth drilling tool, for use in performing a single trip kickoff from a casing in a well bore. The combination milling and drilling tool has a first, relatively more durable cutting structure, such as tungsten carbide, and a second, relatively harder cutting structure, such as polycrystalline diamond. The more durable first cutting structure is better suited for milling metal casing, while the harder second cutting structure is better suited for drilling through a subterranean formation, especially a rock formation. The first cutting structure is positioned outwardly relative to the second cutting structure, so that the first cutting structure will mill through the metal casing while shielding the second cutting structure from contact with the casing. The first cutting structure can wear away while milling through the casing and upon initial contact with the rock formation, thereby exposing the second cutting structure to contact with the rock formation. The second cutting structure can then be used to drill through the rock formation.
REFERENCES:
patent: 2819043 (1958-01-01), Henderson
patent: 3066749 (1962-12-01), Hildebrandt
patent: 3765493 (1973-10-01), Rosar et al.
patent: 3908759 (1975-09-01), Cagle et al.
patent: 4255165 (1981-03-01), Dennis et al.
patent: 4690228 (1987-09-01), Voelz et al.
patent: 5025873 (1991-06-01), Cerkovnik
patent: 5025874 (1991-06-01), Barr et al.
patent: 5027912 (1991-07-01), Juergens
patent: 5135061 (1992-08-01), Newton, Jr.
patent: 5248006 (1993-09-01), Scott et al.
patent: 5423387 (1995-06-01), Lynde
patent: 5531281 (1996-07-01), Murdock
patent: 5887655 (1999-03-01), Haugen et al.
patent: 5887668 (1999-03-01), Haugen et al.
Anderson James W.
Lynde Gerald D.
Nazzal Greg
Oldham Jack Thomas
Randall Brad
Baker Hughes Incorporated
Dang Hoang C.
Spinks Gerald W.
LandOfFree
Combination milling tool and drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combination milling tool and drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combination milling tool and drill bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1444248