US 12,110,892 B2
System and methodology comprising composite stator for low flow electric submersible progressive cavity pump
Peter Hondred, De Soto, KS (US); Jason Holzmueller, Lawrence, KS (US); William Goertzen, Lawrence, KS (US); and Maxim Pushkarev, Lawrence, KS (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 18/041,414
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Aug. 20, 2021, PCT No. PCT/US2021/046899
§ 371(c)(1), (2) Date Feb. 13, 2023,
PCT Pub. No. WO2022/040522, PCT Pub. Date Feb. 24, 2022.
Claims priority of provisional application 63/068,430, filed on Aug. 21, 2020.
Prior Publication US 2023/0313794 A1, Oct. 5, 2023
Int. Cl. F04C 2/107 (2006.01); F04C 13/00 (2006.01)
CPC F04C 2/1075 (2013.01) [F04C 13/008 (2013.01); F04C 2230/60 (2013.01); F05C 2225/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for use in a borehole, comprising:
an electric submersible progressive cavity pump system having:
a motor;
a gearbox driven by the motor; and
a progressive cavity pump having a rotor driven by the gearbox and a stator surrounding the rotor, the stator comprising:
an outer metal housing;
a first layer located within the outer metal housing, the first layer being formed from a thermoset resin secured to the outer metal housing and having a first layer interior surface formed as an internal thread; and
a second layer located within the first layer and secured to the first layer along the internal thread, the second layer being formed from an elastomer in a shape which follows the internal thread such that a second layer interior surface generally matches the shape of the first layer interior surface,
wherein the second layer is secured to the thermoset resin of the first layer via an elastomer bonding layer located between the elastomer and the thermoset resin, and
wherein the elastomer bonding layer comprises a polybutadiene.