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. 13, 1991
Filed:
Dec. 27, 1988
Gerald D Lynde, Bossier City, LA (US);
Harold H Harvey, Jr, Bossier City, LA (US);
Tri-State Oil Tools, Inc., , US;
Abstract
A cutting tool (10) for removing metal tubular members held in stationary position downhole from a well bore and adapted to be inserted within a well. The cutting tool (10) includes a plurality of elongate blades (32,34) on the cylindrical body (22) of the cutting tool (10) which extend below the bottom of the tool body (22). Cutting elements (42) of a predetermined size and shape are arranged in a symmetrical predetermined pattern on the lower portion of each blade (32,34) in a plurality of predetermined transversely extending rows below the tool body (22). The cutting elements (42) in adjacent transverse rows for each blade (32) are staggered horizontally and have different concentric cutting paths. Preferably, the cutting elements (42) in corresponding transverse rows on adjacent blades (32,34) are staggered and have different concentric cutting paths. Each cutting element (42) has a groove (42F) for receiving and directing forwardly the extending end of a metal shaving (S) to facilitate breaking thereof from the upper end of the tubular member (14) being cut away. A high strength tungsten carbide alloy material (41) is secured to the trailing surface of the blades (32,34) to reinforce the blades in addition to assisting the cutting action.