Patent · US Active

Pointed working ends on a drill bit

US9145742B2 · kind B2 · utility

6Cited by

6References

20Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

David R. Hall · Provo, US
Ronald B. Crockett · Payson, US
John Bailey · Orland Park, US

Key dates

Filing date	Dec 10, 2013
Grant date	Sep 29, 2015
Priority date	—
Expiry date	Dec 10, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/567
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In one aspect of the present invention, a drill string has a drill bit with a body intermediate a shank and a working face. The working face has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working face. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end also has a central axis which intersects an apex of the pointed geometry. The axis is oriented between a 25 and 85 degree positive rake angle.

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