Cutting tool for removing materials from well bore
This paper describes a cutting tool adapted to be positioned downhole in a well bore for removing members from the well bore. It comprises: a tool body adapted to be received within the well bore and to be supported at its upper end for rotation about a longitudinal axis; blades at spaced intervals on the body and extending outwardly therefrom, each of the blades having a base with a leading surface relative to the direction of rotation; closely spaced cutting elements of hard cutting material secured to the leading surface of the base each being of a predetermined size and shape and arranged in a predetermined generally symmetrical pattern on the base relative to the other elements, each of the cutting elements having an exposed front cutting face forming a cutting surface, a rear face secured to the leading surface of the base, a peripheral surface extending between the faces and a relatively sharp edge formed at the juncture of the front face and peripheral surface, the front face of each cutting element having a surface irregularity therein for directing a turning from the member being cut to effect a breaking of the turning. The cutting elements being arranged in transversely extending rows on each blade, the cutting elements on corresponding transversely extending rows on adjacent blades being offset whereby the concentric cutting paths of the cutting elements on adjacent blades are offset.
- Assignee:
- Tri-State Oil Tools, Inc., Bossier City, LA (USA)
- Patent Number(s):
- US 4978260; A
- Application Number:
- PPN: US 7-181812
- OSTI ID:
- 5202942
- Resource Relation:
- Patent File Date: 15 Apr 1988
- Country of Publication:
- United States
- Language:
- English
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