The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2003
Filed:
Mar. 01, 2001
Applicant:
Inventors:
Fabio Cecconi, Drancy, FR;
Louis Soulier, Sannois, FR;
Assignee:
GeoServices S.A., Le Blanc Mesnil, FR;
Primary Examiner:
Int. Cl.
CPC ...
G01V 1/40 ;
U.S. Cl.
CPC ...
G01V 1/40 ;
Abstract
Seismic waves are recorded twice by a reference sensor ( ) above ground and by a sensor ( ) located in the drill hole ( ). Measurements are synchronized by a clock system, the clock associated with sensor ( ) being designed specifically for providing such synchronization in spite of operating conditions prevailing at the bottom of a drill hole (vibrations, shocks, temperature).