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. 06, 1993
Filed:
Dec. 24, 1991
Applicant:
Inventors:
G Wayne Westerman, Midland, TX (US);
Richard C Montgomery, Midland, TX (US);
Assignee:
EVI-Highland Pump Company, Inc., Odessa, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417 12 ; 417 18 ; 417 45 ; 417 53 ; 73151 ;
Abstract
New apparatus and methods are disclosed for controlling the operation of a rod-pumped oil well. The load on and position of the rod string are measured, an integration calculation related to the work done during a portion of the downstroke is performed, and the result is compared to a reference value, to detect a pumped-off condition in the well.