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:
Aug. 14, 2007
Filed:
Jul. 14, 2005
Wayne Rudd, Aberdeen, GB;
Wayne Rudd, Aberdeen, GB;
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A method of manufacturing an expandable slotted tube fabricated from at least one tubular element and at least two annular elements connected to the opposite ends of the tubular element by means of butt joints wherein axially extending slots are formed at a uniform angular spacing around the periphery of the tube and in longitudinally overlapping relation characterized by cutting said annular elements in a pattern of overlapping positionally fixed slots in accordance with invariable parameters which are pre-determined relative to the dimensions of said annular elements and cutting in said tubular element a pattern of slots that is variable in accordance with measured parameters of the tube so as to achieve the required overlap between said positionally fixed and variable slots. A machine for carrying out the method is also described.