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:
Jan. 26, 1999
Filed:
Aug. 28, 1996
Christopher P Hutchinson, Houston, TX (US);
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
Section mills have been invented that have one or more blades one or more of whose tops are pivotably extendable outwardly from a mill body as bottoms of the blade(s) rotate about a fixed point, and one or more blades whose bottoms are pivotably extendable outwardly from the mill body, the blades pivotably secured to the mill body so that, in one aspect, in response to a downwardly moving wash tube contacting the blades, the blades move out from the mill body. In one aspect certain of the blades have a milling surface which is of such an outward extent and which is parallel to a central longitudinal axis of the mill body when the blades are fully extended so that 'full sweep' milling is achieved.