Stabilizer for navigational drilling

A stabilizer for use in controlled directional drilling includes a plurality of spaced and axially extending blade elements each having a blade surface face of hardened material. The blade surface face includes a tapered lead portion and a tapered trailing portion with a flat non-tapered surface fac...

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Bibliographische Detailangaben
Hauptverfasser:	WALKER, CLYDE R, KARLSSON, HARALDUR, GLASSCOCK, BURLEY
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	A stabilizer for use in controlled directional drilling includes a plurality of spaced and axially extending blade elements each having a blade surface face of hardened material. The blade surface face includes a tapered lead portion and a tapered trailing portion with a flat non-tapered surface face portion therebetween. Each blade surface includes an edge portion in which the leading edge is radiused. Thus constructed, the stabilizer reduces kerfing into the formation and hang-up and change of tool face orientation during navigational drilling. Eccentric stabilizers are also described.