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:
Nov. 03, 1998
Filed:
Oct. 27, 1997
Applicant:
Inventor:
Kenneth B Nolen, Midland, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166369 ; 166 53 ;
Abstract
An acoustic method is disclosed for performing pump off control using fluid level in producing wells and other inaccessible cavities. The method uses flow induced pressure phenomena to locate the fluid level. Simplified equipment is involved and acoustic velocities can be measured externally from the well. The method applies to various artificial lift methods in which a conduit is accessible for measuring fluid level.