Devices and systems for measurement of position of drilling...

Details Devices and systems for measurement of position of drilling... Devices and systems for measurement of position of drilling...

2011-01-25

2011-01-25

Thompson, Kenneth (Department: 3672)

Wells

Above ground apparatus

Moving tubing or cable into an existing well

C073S152450

Reexamination Certificate

active

07874351

ABSTRACT:
A depth measurement system for determining an absolute depth of a drill string uses a position acquisition device to determine a length value for a joint or stand being added to the drill string. The position acquisition device receives a signal from a target object associated with the added joint. The processed signal can be an optical signal, a radio signal, an acoustic signal, or other suitable signal. Using techniques such as time lapse, Doppler effect or phase shift, the depth measurement system determines a position parameter such as distance or position based on the received signal. Thereafter, the processor determines the absolute depth of the drill string by summing a length of each joint making up the drill string and correcting for the position of the newly added joint.

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