Patent · US Active

Fixed cutter bit partial blade connection at bit center

US9103169B2 · kind B2 · utility

0Cited by

2References

23Claims

0Family size

Assignee

SMITH INTERNATIONAL, INC. · US

Inventors

Yuelin Shen · Houston, US
Youhe Zhang · Spring, US
Paul Higgins · Round Rock, US

Key dates

Filing date	May 23, 2008
Grant date	Aug 11, 2015
Priority date	—
Expiry date	Jan 9, 2030

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/42
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A fixed cutter drill bit including a bit body having a plurality of primary blades extending radially from a bit center area, wherein the bit center area includes a partial connection between at least two of the plurality of primary blades. The fixed cutter drill bit further including at least one cutter disposed on at least one of the blades. Additionally, a method of designing a fixed cutter drill bit includes modeling the fixed cutter drill bit, the fixed cutter drill bit including a plurality of primary blades extending radially from a bit center area, wherein the plurality of primary blades includes a plurality of cutters. The method further including determining a center of an innermost cutter on each primary blade, creating a partial connection between the primary blades, and outputting the model of the fixed cutter drill bit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.