06050348 is referenced by 78 patents and cites 20 patents.

A method and apparatus for precisely controlling the rotation of a drill string. A sensor monitors the rotation of the drill string and transmits the rotational information to a computer. The computer controls the rotation of the motor driving the drill string and rotates the drill string through an angle input by the operator. The computer may also utilize the sensor's rotational information to oscillate the drill string between two predetermined angles. The computer may also receive orientation information from a downhole tool sensor. The downhole tool information may be combined with the rotational information to enable the computer to accurately reorient the downhole tool.

Title
Drilling method and apparatus
Application Number
8/877738
Publication Number
6050348
Application Date
June 17, 1997
Publication Date
April 18, 2000
Inventor
Beat Kuttel
The Woodlands
TX, US
Allan S Richarson
The Woodlands
TX, US
Agent
Baker Botts L
Assignee
Canrig Drilling Technology
TX, US
IPC
E21B 44/00
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