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:
Jun. 01, 1976
Filed:
Oct. 02, 1972
Applicant:
Inventor:
William H Parker, Hurst, TX (US);
Assignee:
Del Norte Technology, Inc., Euless, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; E21B / ;
U.S. Cl.
CPC ...
340 / ; 166 72 ; 175 48 ; 3402 / ;
Abstract
A signal is transmitted through the walls of tubing extending down into an oil well in order to control a disaster valve at the lower end of the tubing. If the signal disappears, the valve shuts. In one embodiment, the tubing functions as the core of a transformer. In another embodiment, the tubing conducts an acoustic signal.