Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1994-08-08
1995-08-08
Bagnell, David J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175357, E21B 1018, E21B 1020
Patent
active
054390672
ABSTRACT:
A rotary cone drill bit for forming a borehole having a one-piece bit body with a lower portion having a convex exterior surface and an upper portion adapted for connection to a drill string. A number of support arms are preferably attached to the bit body and depend therefrom. Each support arm has an inside surface with a spindle connected thereto and an outer surface. Each spindle projects generally downwardly and inwardly with respect to the associated support arm. A number of cone cutter assemblies equal to the number of support arms are mounted on each of the spindles. The support arms are spaced on the exterior of the bit body to provide enhanced fluid flow between the lower portion of the bit body and the support arms. Also, the length of the support arms is selected to provide enhanced fluid flow between the associated cutter cone assembly and the lower portion of the bit body. The same bit body may be used with various rotary cone drill bits having different gauge diameters.
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Security/Dresser "Dresser Oilfield Catalog" Rock Bits, Diamond Products, Drilling Tools, Security Means Technology.
"State of the Science in Rock Bit Techn." by Carlos Fernandez, SPACEBIT.
Bagnell David J.
Dresser Industries Inc.
Tsay Frank S.
LandOfFree
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