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US 2010/0300673 A1Published application
Side track bit
AssigneeBaker Hughes Incorporated
InventorsVolker Richert, Henning Finke
Life of this patent
Estimating the term…
Abstract
A drill bit for cutting casing employing a plurality of discrete, abrasive particulate-impregnated cutting structures having TSP cutting structures therein extending upwardly from abrasive particulate-impregnated blades, which define a plurality of fluid passages therebetween on the bit face. Additional cutting elements may be placed in the inverted cone of the bit surrounding the centerline thereof.
Claims30
A rotary drag bit for cutting casing and drilling subterranean formations, comprising:
- a bit body having a face extending from a centerline to a gage;
- an inverted cone formed in the face of the bit body;
- a plurality of blades comprising a particulate abrasive material on the face and extending generally radially outwardly toward the gage;
- and
- a plurality of discrete, mutually separated cutting structures protruding from at least one blade of the plurality of blades, at least one cutting structure of the plurality of discrete, mutually separated cutting structures comprising a particulate abrasive material and at least two cutting structures formed at least partially within the at least one cutting structure of the plurality of discrete, mutually separated cutting structures.
2 more elements
A rotary drag bit for cutting casing and drilling subterranean formations, comprising:
- a bit body having a face extending from a centerline to a gage, the face including an inverted cone surrounding the centerline;
- and
- a plurality of cutting structures located on the face external of the inverted cone portion and protruding from the face, the plurality of cutting structures comprising a plurality of discrete, mutually separated generally rectangular members, each discrete, mutually separated rectangular member comprising a particulate abrasive material and at least two thermally stable diamond product (TSP) material cutting structures formed at least partially within the discrete, mutually separated rectangular member.
Dependencies are inferred from the claim text.