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:
Mar. 23, 1976
Filed:
Apr. 03, 1974
Applicant:
Inventors:
Herbert E Townsend, Jr, Coopersburg, PA (US);
James B Horton, Bethlehem, PA (US);
Assignee:
Bethlehem Steel Corporation, Bethlehem, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05C / ; C23F / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
21 61 ; 21-2 ; 21 / ; 21 / ; 137539 ; 138109 ; 138178 ; 166243 ; 403 31 ; 403 37 ;
Abstract
Damage due to rupture or ballooning of the plastic jacket on a flexible pumping strand due to filling of the well with gas is prevented by providing an assembly including a preset pressure release valve in the lower portions of the strand to quickly release fluid from the interior of the strand to the surrounding environment upon the attainment of a pressure differential between the interior and exterior of the strand within a predetermined fraction of the rupture or ballooning strength of the plastic jacket on the pumping strand.