OPTIMIZED LINER THICKNESS FOR POSITIVE DISPLACEMENT DRILLING MOTORS

A stator for a positive displacement motor including an external tube. The external tube includes an outer surface and an inner surface, and the inner surface includes at least two radially inwardly projecting lobes extending helically along a length of the external tube. A liner is positioned adjac...

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Bibliographische Detailangaben
Hauptverfasser:	PLOP, ANDREI, KOVAL, VERNON E
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS PRODUCING MECHANICAL POWER PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A stator for a positive displacement motor including an external tube. The external tube includes an outer surface and an inner surface, and the inner surface includes at least two radially inwardly projecting lobes extending helically along a length of the external tube. A liner is positioned adjacent the inner surface, and the liner conforms to the radially inwardly projecting lobes formed on the inner surface and to the helical shape of the inner surface. A thickness of the liner is at a maximum at the at least two radially inwardly projecting lobes. Stator pour moteur volumétrique, incluant un tube externe. Le tube externe inclut une surface externe et une surface interne, et la surface interne inclut au moins deux lobes en saillie radialement vers l'intérieur s'étendant de manière hélicoïdale suivant une longueur du tube externe. Un revêtement est positionné adjacent à la surface interne, et le revêtement épouse les lobes en saillie radialement vers l'intérieur formés sur la surface interne et la forme hélicoïdale de la surface interne. Une épaisseur du revêtement est maximale au niveau des au moins deux lobes en saillie radialement vers l'intérieur.