Apparatus for downhole strain measurements and methods of using same

In one illustrative embodiment the apparatus comprises a body (12), at least one strain gauge cavity (30) in the body, the strain gauge cavity having a strain gauge mounting surface (34) that is located at a position such that a region of approximately zero strain due to at least one downhole operat...

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Bibliographische Detailangaben
Hauptverfasser:	IVIE, CRAIG ROBERT, SCHEN, AARON, JARVIS, BRIAN PETER, BOUCHER, MARCEL LUKE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	In one illustrative embodiment the apparatus comprises a body (12), at least one strain gauge cavity (30) in the body, the strain gauge cavity having a strain gauge mounting surface (34) that is located at a position such that a region of approximately zero strain due to at least one downhole operating condition exists on the mounting surface when the tool is subjected to downhole operating conditions, and a strain gauge (32) operatively coupled to the mounting face above the region of approximately zero strain. The method further comprises positioning the tool in a subterranean well bore and obtaining measurement data using the strain gauge in the tool.