Seismic energy source for use during wellbore drilling

A seismic energy source for use while drilling a wellbore is disclosed. The source includes a drive shaft adapted to be coupled in a drill string, and a housing rotatably supported outside the drive shaft. At least one contact member is disposed on an exterior of the housing and is selectively urged...

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Bibliographische Detailangaben
Hauptverfasser:	MCDONALD WILLIAM J, PITTARD GERARD T, REUTER FRITZ W
Format:	Patent
Sprache:	eng
Schlagworte:	DETECTING MASSES OR OBJECTS GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A seismic energy source for use while drilling a wellbore is disclosed. The source includes a drive shaft adapted to be coupled in a drill string, and a housing rotatably supported outside the drive shaft. At least one contact member is disposed on an exterior of the housing and is selectively urged into contact with a wall of a wellbore surrounding the housing. The source includes means for selectively controlling a force applied to the at least one contact member.