US 11,939,844 B2
Rotor bearing system
Michael J. Guidry, Jr., Hockley, TX (US); and Daniel Alvarado, Spring, TX (US)
Assigned to NATIONAL OILWELL VARCO, L.P., Houston, TX (US)
Filed by NATIONAL OILWELL VARCO, L.P., Houston, TX (US)
Filed on Jul. 22, 2022, as Appl. No. 17/814,326.
Prior Publication US 2024/0026738 A1, Jan. 25, 2024
Int. Cl. E21B 4/02 (2006.01); E21B 4/00 (2006.01)
CPC E21B 4/003 (2013.01) [E21B 4/02 (2013.01)] 18 Claims
OG exemplary drawing
 
14. A method of limiting eccentric motion of a cylindrical rotor head of a progressing cavity machine and a driveshaft of an external device relative to a stator of the progressing cavity machine using an external bearing system, the method comprising:
securing a proximal portion of a shaft member of the external bearing system to the cylindrical rotor head of the progressing cavity machine;
securing a distal portion of the shaft member of the external bearing system of the rotor bearing system to the driveshaft of the external device;
securing a first end of a housing of the external bearing system to an end of the stator of the progressing cavity machine;
securing a second end of the housing to an end of a drive shaft housing of the external device; and
managing eccentric motion of the cylindrical rotor head with a bearing arranged between the shaft member and the housing of the external bearing system.