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US 2026/0266284 A1Published application
Metal felt and brush structures as sealing elements in metal-metal mud motors
AssigneeBaker Hughes Oilfield Operations LLC
InventorErik Bartscherer
Life of this patent
Estimating the term…
Abstract
A mud motor and a drill string having the mud motor. The mud motor includes a stator and a rotor. A lining between the stator and the rotor includes fibers forming a fiber pattern. The lining is a coating of at least one of a lobed inner surface of the stator and a lobed outer surface of the rotor.
Claims22
A mud motor, comprising:
- a stator;
- a rotor;
- and
- a lining between the stator and the rotor, wherein the lining is made of fibers forming a fiber pattern and is free of elastomer, wherein absence of the elastomer enables the lining to withstand temperatures higher than 150 C. for a time longer than 120 circulation hours without the need to pull the mud motor out of a borehole for the reason of insufficient motor efficiency.
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A method for manufacturing a mud motor, the method comprising:
- forming a mud motor comprising a stator and a rotor;
- and
- disposing a lining between the stator and the rotor, wherein the lining is made of fibers forming a fiber pattern and is free of elastomer, wherein absence of the elastomer enables the lining to withstand temperatures higher than 150 C. for a time longer than 120 circulation hours without the need to pull the mud motor out of a borehole for the reason of insufficient motor efficiency.
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Dependencies are inferred from the claim text.