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. 26, 1977
Filed:
Nov. 06, 1975
Applicant:
Inventor:
William H Parker, Hurst, TX (US);
Assignee:
Del Norte Technology, Inc., Euless, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
340 / ; 340 / ; 175 40 ; 166 72 ; 340 / ;
Abstract
A sonic energy signal is transmitted continuously through the walls of tubing extending down into an oil or gas well, in order to control a disaster valve at the lower end of the tubing. If the signal disappears, the valve shuts automatically. In one embodiment, the tubing functions as the core of a transformer. In another embodiment, the tubing conducts an acoustic signal. The sonic energy may be transmitted by either a hydraulic ram or a tuned hammer, which transmits energy vertically into the tubing walls.