Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent
1995-10-27
1998-04-21
Neuder, William P.
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
E21B 1026
Patent
active
057408734
ABSTRACT:
A drill bit, process of drilling, and method of manufacturing the same are provided wherein the drill bit has a bit body defining a radially extending waist and a plurality of cutting elements proximate the waist. The waist has an outer diameter less than an outer diameter defined by a plurality of outermost cutting elements. The difference in outer diameters between the waist and the outermost cutting elements is determined by the thickness of filter cake that forms on the wall of a wellbore, such that the waist of the bit does not contact the filter cake during the drilling process.
REFERENCES:
patent: 2614809 (1952-10-01), Zublin
patent: 3915246 (1975-10-01), Sheshtawy
patent: 4981183 (1991-01-01), Tibbitts
patent: 5099934 (1992-03-01), Barr
patent: 5199511 (1993-04-01), Tibbitts et al.
patent: 5361859 (1994-11-01), Tibbitts
patent: 5553678 (1996-09-01), Barr et al.
Corapcloglu, M. Yavuz and Abboud, Nelly M., Cake Filtration with Particle Penetration at the Cake Surface, SPE Reservoir Engineering, Aug. 1990, pp. 317-326.
Baker Hughes Incorporated
Neuder William P.
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