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EDM Tool Assembly and Process for Radiused Wireways

IP.com Disclosure Number: IPCOM000126100D
Publication Date: 2005-Jun-30

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Abstract of the Invention: This first invention is a tool assembly and process that enables the manufacture of radiused wireways via the EDM (Electrical Discharge Machining) process. The tool assembly consists of a graphite tip connected to a radiused and hollow support member. The tip is designed to match the desired diameter of the wireway and the support member is designed to match the desired radius of the wireway. A connection detail at the other end of the support member attaches to the electrolytic fluid supply line from the EDM machine. The fluid is pumped from the EDM machine, through the support member, and through the graphite tip. A bracket with a perpendicular shaft also connects to the support member. The shaft is designed to fit in the collet of the EDM machine. The collect of the EDM machine rotates the tool assembly about the axis of the shaft and tool assembly. The radiused wireway that results from using this unique tool assembly and EDM manufacturing process interconnects gundrilled wireways with pressure sealed electronic hatch pockets on instrumented drill collars. The radiused wireway is an advantage to conventional cross drilled wireways as there is no need to seal up the wireway at the OD of the drill collar. The seal used on conventional cross drilled wireways is prone to failures. The radiused wireway has no seal and is thus not prone to failure modes thus making our drill collars stronger and more reliable