Downhole measurement of depth

Details Downhole measurement of depth Downhole measurement of depth

1997-06-06

1999-04-27

Dang, Hoang C.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

7315245, E21B 4704

Patent

active

058969390

ABSTRACT:
The invention is a process and method for determination of the depth of a well during the process of drilling. A computer is housed in the drilling tool and pre-programmed with the data of the planned pattern of the borehole. Changes in the drilling mud pressure or flow of the drilling mud are detected by a downhole sensor and are used as a counter for the number of drilling string segments used. This, together with the known length of a drilling string segment, enables the computer to calculate the depth of the tool. The calculated depth is used by the computer to control the direction controlling device of the drilling tool.

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