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:
Oct. 02, 1990
Filed:
Oct. 12, 1989
Eric Marin, Versailles, FR;
Marcel Le Comte, Bezons, FR;
Institut Francais du Petrole, Rueil Malmaison, FR;
Abstract
A method is provided for improving the coefficient of transmission to geological formations of the energy generated by the firing of a seismic source lowered inside a well or borehole and a device for implementing same. A zone of the wall containing the seismic source is defined by confinement so as to prevent the propagation along the well, outside the confined zone, of the energy generated therein by the seismic source, when fired. The confinement is achieved by closing off the wall on each side of the seismic source. Two expandable members are used disposed in the wall on each side of the source and each comprising for example an elastomer sheath, an annular piston whose movement causes expansion of the sheath and hydraulic means for moving the piston.