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:
Jul. 17, 2001
Filed:
Nov. 15, 1996
Charles Naville, Vlaminck, FR;
Institute Francais du Petrole, Rueil-Malmaison, FR;
Abstract
This invention is a method of conducting seismic prospecting operations using a drilling tool (,) acting at the bottom of a well (,), which creates very powerful seismic vibrations, transmitting reference signals representing the vibrations of the tool in real time or later, and correlating the seismic signals picked up by a receiving assembly (,) with the reference signals. The reference signals are furnished by sensors (,) in contact with the drill string and at a distance from the down-hole assembly constituted by tool (,) and associated drill collars (,). In order for these reference signals to be truly representative, a damping means (,) and at least one filtering element (,) designed to attenuate to a great degree the multiple reflections in a frequency range useful for seismic prospecting are interposed into the drill string. The invention has application to the making of seismic recordings.