BLADE-TYPE DRILL BIT

The invention relates to rock destruction tools used for drilling oil and gas wells, especially for drilling slant and horizontal wells and formations having alternating layers of different hardness. The technical effect consist in improved steerability of the drilling bit and higher vibration resis...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ISHBAEV GNIYATULLA GARIFULLOVICH, BALUTA ANDREJ GRIGORIEVICH, SHARIPOV ARTUR NAILIEVICH
Format:	Patent
Sprache:	eng
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SOLDERING OR UNSOLDERING SPRAYING OR ATOMISING IN GENERAL TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The invention relates to rock destruction tools used for drilling oil and gas wells, especially for drilling slant and horizontal wells and formations having alternating layers of different hardness. The technical effect consist in improved steerability of the drilling bit and higher vibration resistance of polycrystalline diamond cutters (PDC) bit due to the use of a composite plating applied and adjustment of cutter protrusion over this plating. Blade drilling bit includes body with coupling thread, central channel, exit holes for flushing fluid and blades, equipped with polycrystalline diamond cutters PDC. Blade surface is covered with composite plating having different wear resistance depending on thickness, and tolerance of composite plating to abrasion wear increases from the outer surface to sublayers, and the size of cutter protrusion close to the centre of bit over the surface of composite plating is less than required for drilling the hardest formations in given geological section.