Patent ID: 11970923
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC E  H | IPC E  H

Claim 9:
10. A downhole electric generator comprising:
a housing;
a turbine assembly within the housing, the turbine assembly including,
a drilling fluid input port; and
a set of turbine blades attached to a turbine shaft that is axially aligned with the drilling fluid input port, wherein the set of turbine blades are configured to contact and be driven by drilling fluid;

a first alternator assembly within the housing, the first alternator assembly including,
a first casing;
a first rotor disposed within the first casing, the first rotor including,
a first cylindrical rotor core coupled to and rotated by the turbine shaft;
a first plurality of permanent magnets disposed in the first cylindrical rotor core; and
a first drilling fluid channel extending axially through the center of the first cylindrical rotor core;

a first stator disposed within the first casing, the first stator including,
a first cylindrical stator core concentrically disposed between the first rotor and the first casing;
first conductor windings within the first cylindrical stator core; and
a first plurality of radially distributed fluid channels extending axially within the first cylindrical stator core between a front end of the first cylindrical stator core and a back end of the first cylindrical stator core; and

a first electrical interface configured to electrically couple the first alternator assembly to a second alternator assembly, the first electrical interface further configured to provide electrical power generated by the first alternator assembly to the second alternator assembly;

wherein the first alternator assembly is mechanically coupled to the turbine assembly at a first end of the first alternator assembly and wherein the first alternator assembly is mechanically coupled to the second alternator assembly at a second end of the first alternator assembly, wherein rotation of the turbine shaft causes the first cylindrical rotor core of the first alternator assembly and a rotor core of the second alternator assembly to rotate.