Downhole turbine
First Claim
1. A downhole assembly, comprising:
- a downhole tool string component comprising a through bore adapted to pass drilling mud from a first end of the component to a second end of the component;
a turbine assembly being disposed within the bore and in communication with a downhole electrical generator through a drive shaft;
the generator comprises a plurality of electrically conducting coils disposed around a rotor with at least one magnetic element, which rotor is connected to the driveshaft;
the generator comprises a characteristic of having a range of rotor rotational velocity to which the generator produces an optimal amount of power;
the turbine assembly comprises an overall characteristic which causes the turbine assembly to stall when engaged by drilling mud at a turbine rotational velocity which causes the rotor to exceed a maximum rotational velocity of the range.
3 Assignments
0 Petitions
Accused Products
Abstract
In one aspect, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud. A fluid barrier is disposed within the bore and has a cylindrical portion substantially aligned with the bore. A drive shaft is sealed within and substantially coaxial with the cylindrical portion and has a first magnet disposed on its outer surface. A turbine assembly is disposed around the cylindrical portion of the fluid barrier and has an inner diameter and outer surface. The outer surface of the turbine assembly has a plurality of turbine blades. The inner diameter of the turbine assembly has a second magnet disposed within a region defined by the turbine blades and is in magnetic communication with the first magnet of the drive shaft, wherein when the drilling mud engages the turbine blades the first and second magnets rotate the drive shaft with the turbine assembly.
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Citations
18 Claims
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1. A downhole assembly, comprising:
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a downhole tool string component comprising a through bore adapted to pass drilling mud from a first end of the component to a second end of the component; a turbine assembly being disposed within the bore and in communication with a downhole electrical generator through a drive shaft; the generator comprises a plurality of electrically conducting coils disposed around a rotor with at least one magnetic element, which rotor is connected to the driveshaft; the generator comprises a characteristic of having a range of rotor rotational velocity to which the generator produces an optimal amount of power; the turbine assembly comprises an overall characteristic which causes the turbine assembly to stall when engaged by drilling mud at a turbine rotational velocity which causes the rotor to exceed a maximum rotational velocity of the range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification