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:
Feb. 02, 1982
Filed:
Jan. 21, 1980
Applicant:
Inventors:
Clifford W Petersen, Missouri City, TX (US);
John M Bednar, Houston, TX (US);
Edwin J Hocker, Jr, Houston, TX (US);
David H Gauger, Mesa, AZ (US);
James M Henderson, Scottsdale, AZ (US);
Assignees:
Exxon Production Research Company, Houston, TX (US);
Motorola, Inc., Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; E21B / ;
U.S. Cl.
CPC ...
367 82 ; 175 56 ;
Abstract
A portable, electrohydraulic, acoustic transmitter releasably attaches to a solid medium such as a drill string to generate essentially longitudinal, acoustic signals in the medium. The signals are frequency modulated so that encoded messages may be transmitted between a surface and subsurface location to activate downhole equipment.