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US 6,307,290 B1Granted
Piston motor protector, and motor and pumping system incorporating the same
AssigneeCamco International Inc.
InventorKevin T. Scarsdale
Life of this patent
Estimating the term…
Abstract
A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible pistons, instead of an elastomeric bag, to accommodate motor oil contraction and expansion. The motor protector may also include one or more contamination containment sections for processing contaminants in downhole fluid to reduce contamination of the motor oil.
Claims48
A motor protector comprising:
- a casing adapted to be operatively coupled to a downhole motor;
- a first chamber defined within the casing, the first chamber having a first fluid port adapted to couple the first chamber to fluid within the downhole motor;
- a first piston disposed in the first chamber, the first piston having a first side and a second side, the first side of the first piston being adapted to contact the fluid, the first piston being axially slidable within the first chamber in response to pressure of the fluid on the first side of the first piston;
- and
- a bi-directional fluidic seal disposed between the first piston and the first chamber.
2 more elements
A motor protector comprising:
- a casing adapted to be operatively coupled to a downhole motor;
- a first chamber defined within the casing, the first chamber having a first fluid port adapted to couple the first chamber to fluid within the downhole motor;
- a first piston disposed in the first chamber, the first piston having a first side and a second side, the first side of the first piston being adapted to contact the fluid, the first piston being axially slidable within the first chamber in response to pressure of the fluid on the first side of the first piston;
- a second chamber defined within the casing, the second chamber having a second fluid port adapted to couple the second chamber to the fluid;
- and
- a second piston disposed in the second chamber, the second piston having a first side and a second side, the first side of the second piston being adapted to contact the fluid, the second piston being axially slidable within the second chamber in response to pressure of the fluid on the first side of the second piston.
3 more elements
A downhole pumping system comprising:
- a downhole pump;
- a downhole motor being operatively coupled to the downhole pump;
- a motor protector being operatively coupled to the downhole motor, the motor protector comprising:
- a casing operatively coupled to the downhole motor;
- a first chamber defined within the casing, the first chamber having a first fluid port adapted to couple the first chamber to fluid within the downhole motor;
- a first piston disposed in the first chamber, the first piston having a first side and a second side, the first side of the first piston being adapted to contact the fluid, the first piston being axially slidable within the first chamber in response to pressure of the fluid on the first side of the first piston;
- and
- a contamination containment section disposed within the casing adjacent the first chamber, the contamination containment section being adapted to process downhole fluid to reduce contamination of the fluid within the downhole motor.
5 more elements
Dependencies are inferred from the claim text.