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. 10, 1986
Filed:
Feb. 13, 1984
Rangasami S Chandra, Walnut Creek, CA (US);
Stephen G Quen, Fremont, CA (US);
Donald E Eineichner, San Jose, CA (US);
Jorge E Lastra, San Jose, CA (US);
FMC Corporation, Chicago, IL (US);
Abstract
Apparatus for detecting fluid pound in a sucker-rod oil well, using values of sucker-rod position and of sucker-rod load to calculate a reference position and a selected load value. The apparatus continually updates the reference positions and selected load values to compensate for drift in characteristics of transducers used in determining rod load and rod position and for a gradual change in well characteristics. When the sucker-rod moves downward to the updated reference position, the actual rod load is checked against the updated selected value and a warning signal develops when the amount of load exceeds the updated selected value.