DRILLING HEAD

专利名称：DRILLING HEAD

发明人：LAMINE, ETIENNE,DELWICHE, ROBERT申请号：EP97949845.8申请日：19971216公开号：EP09447B1公开日：20030319

摘要：The invention concerns a drilling head of the type used in particular for boringoil wells, comprising a central body (2), cutting blades (3) projecting from the body (2),both in front of it in a drilling direction and on the sides of this same body (2), and cuttingelements (9) in each blade (3) distributed over a front external surface (10) and on alateral external surface (11) for calibrating the well. In this drilling head are arranged ascutting elements: in a central zone (13) of the front surface (10), on at least one blade (3):at least one cutting tip (12) in synthetic polycrystalline diamond compact, and in aremaining zone (14) of the front surface (10) of this blade, located beyond said centralzone (13) relative to the rotation axis, and on the other blades: thermoresistant syntheticdiamonds and/or impregnated diamond particles.

申请人：DRESSER INDUSTRIES INC.,DRESSER IND,DRESSER INDUSTRIES INC.

地址：US

国籍：US

代理机构：Claeys, Pierre

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