Downhole positive displacement motor and associated systems and methods
AssigneeEnsign Energy Services
InventorJohn Stoddard
Life of this patent
Estimating the term…
Abstract
A downhole positive displacement motor (PDM) includes a power section, a bearing section, and a transmission section coupling the power and bearing sections. The power section has a rotor and a stator operable by a pressurized fluid flowing through the motor. The transmission section includes cutting edges configured to reduce a maximum dimension of debris within the pressurized fluid. A method for operating a PDM includes reducing a maximum dimension of debris within the pressurized fluid in a transmission section of the motor before entering a bearing section.
Claims20
A downhole positive displacement motor, comprising:
- a power section comprising a rotor and a stator operable by a pressurized fluid flowing through the motor;
- a bearing section comprising a drive shaft;
- and
- a transmission section coupling the power section to the bearing section, the transmission section comprising a plurality of cutting edges configured to reduce a maximum dimension of debris within the pressurized fluid.
A downhole positive displacement motor, comprising:
- a stator comprising an outer tubular housing and an inner elastic layer;
- a rotor positioned within the stator, the rotor configured to rotate in response to a pressurized fluid flowing through the motor;
- a bearing section comprising a drive shaft;
- a coupling shaft between the rotor and the bearing section;
- a flow diverter between the coupling shaft and the bearing section, the flow diverter comprising at least one entry port;
- and
- a plurality of blades fixed across the at least one entry port to cut apart debris within the pressurized fluid, the debris comprising pieces of the stator.
A method for operating a downhole positive displacement motor on a downhole string, comprising:
- pumping a pressurized fluid through a power section of a positive displacement motor, the power section comprising a rotor and a stator;
- directing the pressurized fluid from the power section through a transmission section of the motor and into a bearing section of the motor;
- and
- reducing a maximum dimension of debris within the pressurized fluid in the transmission section before the pressurized fluid enters the bearing section.
Dependencies are inferred from the claim text.