Abstract: A rotating cutter apparatus including a housing having a housing interior surface defining a housing bore, a shaft extending through the housing bore such that an annular space is provided between the housing interior surface and the shaft, and at least one cutter carried on the shaft. The shaft is rotatable relative to the housing about a shaft axis. The at least one cutter extends radially toward the housing interior surface and is rotatable relative to the housing about the shaft axis. A method for reducing a size of solid objects contained in a fluid, including providing a rotating cutter apparatus, introducing the fluid containing the solid objects into the rotating cutter apparatus, and rotating a shaft and at least one cutter in order to reduce the size of the solid objects while passing the fluid through the rotating cutter apparatus.

Abstract: An example drilling turbine includes a turbine power section having a turbine shaft and a plurality of turbine stages axially arranged along the turbine shaft. A turbine bearing section is coupled to the turbine power section and has a drive shaft operatively coupled to the turbine shaft such that rotation of the turbine shaft rotates the drive shaft. The turbine bearing section includes a lower mandrel that houses a portion of the drive shaft rotatable with respect to the lower mandrel, one or more magnets disposed on an inner surface of the lower mandrel, a generator coil coupled to the drive shaft and aligned with the magnets, and one or more sensors coupled to the drive shaft and in electrical communication with the generator coil. The turbine shaft rotates the drive shaft, which rotates the generator coil with respect to the magnets, and thereby generates electrical power for the sensors.

Abstract: The turbine (100) can be used to transmit electrical data signals, for example, sensor data signals, across a down hole turbine using, with the data signals be communicated via a shaft (102). As a result, a signal can be induced onto the shaft (102) from a lower end of the shaft (102), for example, motor shaft, to an upper end of the shaft (102). The signal can be induced on the shaft (102) by a first induction loop (112) and can be picked up by a second induction loop (114) with the first induction loop (112) being downhole from the second induction loop (114). The second induction loop (114) can be communicatively coupled to a receiver (712) which can pass the signals passed to a transmitter (712), for example, a measurement while drilling (MWD) unit. The MWD unit can then process the signal and transmit the signal to the surface.

Abstract: An example drilling turbine includes a turbine power section having a turbine shaft and a plurality of turbine stages axially arranged along the turbine shaft. A turbine bearing section is coupled to the turbine power section and has a drive shaft operatively coupled to the turbine shaft such that rotation of the turbine shaft rotates the drive shaft. The turbine bearing section includes a lower mandrel that houses a portion of the drive shaft rotatable with respect to the lower mandrel, one or more magnets disposed on an inner surface of the lower mandrel, a generator coil coupled to the drive shaft and aligned with the magnets, and one or more sensors coupled to the drive shaft and in electrical communication with the generator coil. The turbine shaft rotates the drive shaft, which rotates the generator coil with respect to the magnets, and thereby generates electrical power for the sensors.

Abstract: The turbine (100) can be used to transmit electrical data signals, for example, sensor data signals, across a down hole turbine using, with the data signals be communicated via a shaft (102). As a result, a signal can be induced onto the shaft (102) from a lower end of the shaft (102), for example, motor shaft, to an upper end of the shaft (102). The signal can be induced on the shaft (102) by a first induction loop (112) and can be picked up by a second induction loop (114) with the first induction loop (112) being downhole from the second induction loop (114). The second induction loop (114) can be communicatively coupled to a receiver (712) which can pass the signals passed to a transmitter (712), for example, a measurement while drilling (MWD) unit. The MWD unit can then process the signal and transmit the signal to the surface.