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. 16, 1990
Filed:
Dec. 11, 1989
Vel Berzin, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
Existing inflatable packers employ a three valve system for controlling the application of tubing pressure to the interior of an inflatable packing element surrounding the tubing. The three valves of such system are disposed in chordal relationship in the tubular wall of a valve collar which is secured to one end of the inflatable packing element. The valves employed are respectively an inflation initiating valve, a check valve and an inflate limit valve which are serially connected insofar as fluid flow is concerned. Because of the configuration of the flow passages, damage caused by fluid flow is much more severe on the check valve and inflate limit valve. Since no increase in diameter of the check and inflate limit valve can be tolerated, a duplicate set of such valves are provided in the tubular wall of the valve collar with the two sets of check valves and inflate limit valves connected in parallel to essentially double the effective flow area through such valves.