NITROGEN- AND CERAMIC-SURFACE-TREATED COMPONENTS FOR DOWNHOLE MOTORS AND RELATED METHODS

Downhole motors include a stator, which may be formed from a steel material and comprise a bore. At least one surface of the stator may be treated with a surface treatment. The surface treatment includes a nitrided region comprising nitrogen diffused into the steel material and a ceramic material ad...

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Bibliographische Detailangaben
Hauptverfasser:	KOPECKI DENIS S, TAYLOR KYLE L, LIN CHIH C
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ENGINE PLANTS IN GENERAL GENERATION HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	Downhole motors include a stator, which may be formed from a steel material and comprise a bore. At least one surface of the stator may be treated with a surface treatment. The surface treatment includes a nitrided region comprising nitrogen diffused into the steel material and a ceramic material adjacent to the nitrided region; the ceramic material defining an interior surface of the stator defining the bore. Methods of making downhole motors may include exposing a stator to an elevated temperature to heat the stator in a nitrogen-rich environment. Nitrogen may be diffused into a steel material of the stator and a nitrided region may be formed at one or more surfaces of the stator. The stator may be cooled. The stator may be removed from the nitrogen-rich environment. A ceramic material may be coated on the nitrided region of the stator.