US 2014/0190752 A1 · IMPREGNATED BIT WITH IMPROVED CUTTING STRUCTURE AND BLADE GEOMETRY

Abstract

A rotary drag bit for drilling subterranean formations includes a bit body having a face extending from a centerline to a gage. A plurality of blades may be disposed on the face, and may generally extend radially outwardly toward the gage. The bit may further include a plurality of discrete impregnated cutting posts, each of which may extend outwardly from an associated blade. Each discrete impregnated cutting post angles generally toward a front edge of the associated blade and generally toward the intended direction of rotation of the bit. The rotary drag bit may further include a plurality of matrix pockets disposed on the blades. The discrete impregnated cutting posts may be housed within corresponding matrix pockets.

Claims20

Dependent claims

A rotary drag bit for drilling subterranean formations comprising:

a bit body having a face extending from a centerline to a gage;
a plurality of blades on the face generally extending radially outwardly toward the gage, each blade of the plurality of blades having a front edge and a trailing edge;
a plurality of discrete impregnated cutting posts, each discrete impregnated cutting post of the plurality of discrete impregnated cutting posts extending outwardly from at least one blade of the plurality of blades generally in a direction of intended rotation of the rotary drag bit, each discrete impregnated cutting post having a longitudinal axis oriented at an acute angle between about 10 degrees and about 80 degrees with respect to the direction of intended rotation of the rotary drag bit, and each discrete impregnated cutting post located proximate the front edge of the at least one blade.

Dependencies are inferred from the claim text.

Facts

Application

14/203,069Filed 10 Mar 2014

Priority

2 Mar 2009

Published

10 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

E21B 10/567
Button-type inserts: with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
B23P 15/28
Making specific metal objects by operations not covered by a single other subclass or a group in this subclass: cutting tools
E21B 10/43
Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits: characterised by the arrangement of…
E21B 10/55
The bit being of the rotary drag type, e.g. fork-type bits: with preformed cutting elements

Family

Application61/156,732Us provisional application · filed 2 Mar 2009

Application12/714,585Continuation · filed 1 Mar 2010

Application14/203,069Continuation

US 2010/0219000 A1Published application

US 8,689,910 B2Related patent

US 9,267,333 B2Related patent

US 2014/0190752 A1This patent

From the US filing history. Foreign family members aren’t listed.

Impregnated bit with improved cutting structure and blade geometry

Life of this patent

Impregnated bit with improved cutting structure and blade geometry

Life of this patent

Abstract

Claims20