Rotary tools or bits

a technology of rotary tools and bits, applied in drill bits, earthwork drilling and mining, construction, etc., can solve the problems of increasing the number of cutting elements used, and increasing the cost of replacemen
US20040231894A1Inactive Publication Date: 2004-11-25DVORACHEK HAROLD A
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
DVORACHEK HAROLD A
Publication Date
2004-11-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

Rotary tools or bits carry cutter element including pointed contact structures and elements for chipping, cutting, and breaking non-ductile materials such as rock. The cutter elements directly contact and cut through rock and other materials and have tapered contact structure ends. Rotary tools or bits for carrying the cutter elements carry fixed cutter elements, or have sockets for removable threaded or rotatable cutter elements, arranged in straight or curved rows on the head opposite a drill-string-engaging base of the tool. The tools also have radially-extending buttresses which help to protect the cutter elements from damage as a drill string and bit are withdrawn from a bore.
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Description

[0001] This invention relates to rotary tools used to drill, mill, or mine brittle formations, and it relates particularly to tools or bits using contact structures that are tapered and pointed and to cutting elements using such contact structures. Several new contact structures and cutting elements are disclosed for use in a family of earth-boring bits and of bodies for earth-boring bits.BACKGROUND OF THE ART

[0002] The mining, construction, and drilling industries make extensive use of rotary tools. These tools apply intense loads to small areas to break brittle formation and structures into chips. Tapered cutting elements are commonly used for this purpose. Such elements are alternatively referred to as studs, buttons, cutters, cutting tools, and bits. A plurality of cutting elements may be attached to a holding tool. This tool may be a rotating drum, disc, or bit body. Such tools are used to mine minerals, cut trenches, mill pavement, drill holes, and the like.

[0003] A cutting el...

Claims

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