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. 17, 1995
Filed:
Jun. 22, 1994
David L Lagerlef, Eagle River, AK (US);
Jerry L Brady, Anchorage, AK (US);
Stephen Gerlek, Anchorage, AK (US);
Charles M Hightower, Plano, TX (US);
Raymond Wydrinksi, Lewisville, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
Multiple gas lift valves interposed in a well tubing string are each configured to have gas flow ports adapted to emit a predetermined acoustic signal for transmission through the well to a microphone or similar acoustic signal receiver whereby a determination may be made of which gas lift valves are open or operating properly. One or more of the gas lift valves may also include fluid pressure, temperature and viscosity sensors as well as a valve opening sensor and/or valve pressure setting control and an associated signal controller/generator arrangement for generating signals for transmission to the surface. The signal generators may be of the acoustic or so-called stress wave type.