06419032 is referenced by 24 patents and cites 6 patents.

An improved drill bit includes a condition sensor and a semiconductor memory. The condition sensor includes an electrical sensor which has an attribute which changes in response to changes in the bit condition. Monitoring and sampling circuits are utilized to record this data into the semiconductor memory. A communication system may be provided which includes a signal flow path and a selectively-actuable flow control device for controlling the signal flow path until a predetermined operating condition is detected; upon actuation, a detectable pressure change is developed in the wellbore.

Title
Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
Application Number
9/777813
Publication Number
6419032 (B1)
Application Date
February 6, 2001
Publication Date
July 16, 2002
Inventor
Chih Lin
Spring
TX, US
Glenn R Zadrapa
Highlands
TX, US
Don Quy Nguyen
Houston
TX, US
Scott Ray Schmidt
The Woodlands
TX, US
Theodore Edward Zaleski Jr
Houston
TX, US
Eric Charles Sullivan
Houston
TX, US
Agent
Melvin A Hunn
US
Assignee
Baker Hughes Incorporated
TX, US
IPC
E21B 10/22
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