Nabors Drilling Technologies Usa, Inc.

Tyler Clark

Peter R Harvey

Matthew A White

Pradeep Annaiyappa

Kirk Towns

Harmeet Kaur

Peter Harvey

A method of subterranean drilling comprising monitoring at least one drilling criteria at the surface; communicating a marker signal to a bottom hole assembly of a drill string upon meeting a condition of the at least one drilling criteria; and repeating the marker signal at least two consecutive times the condition is met. In an embodiment, the marker signal can be repeated every time the condition is met. A system for subterranean drilling comprising a drill rig adapted to monitor at least one drilling criteria at the surface; a communication element adapted to communicate a marker signal to a bottom hole assembly of a drill string upon meeting a condition of the at least one drilling criteria, wherein the communication element is adapted to communicate the marker signal to the bottom hole assembly at least two consecutive times the condition is met.

Marker signal for subterranean drilling

A method includes coupling a strain gauge to a tubular member, and positioning the tubular member in the wellbore such that the tubular member is placed under bending stress by a curvature or deviation in the wellbore. The method also includes measuring bend on the tubular member with the strain gauge in at least one plane and determining one or more of the magnitude or orientation of the curvature of the wellbore based on an output of the strain gauge.

Method and apparatus for continuous wellbore curvature orientation and amplitude measurement using drill string bending

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Montgomery, TX, United States of America

Tyler Clark