Motor and pump parts
A separator for reducing or eliminating the amount of suspending solids from a reservoir fluid of a downhole motor having a rotating seal. The cleaned fluid circulated past the seal and outermost bearing, the separator having a vortex, rotating cyclone or centrifuge, at least one inlet at least one outlet for cleaned fluid, at least one outlet for solid material, water, particulates or similar material separated from the cleaned fluid. The outlet for the clean fluid may include a porous filter.
1. A separator for reducing or eliminating the amount of suspending solids from a reservoir fluid of a downhole motor, having a rotating seal, cleaned fluid circulated past the seal and a bearing, the separator comprising a vortex comprising a rotating outer wall having a funnel shape and an inner surface having a constant diameter, at least one inlet located adjacent the base of the funnel shape where the distance between the funnel shape and an inner surface is a minimum, the rotation of the outer wall being sufficient to cause a vortex effect, at least one outlet for cleaned fluid located at the top of the inner surface, and at least one outlet located at the top of the funnel shape where the distance between the funnel shape and an inner surface is a maximum for solid material, water, particulates or similar material separated from the cleaned fluid.
2. The separator according to claim 1 , wherein the outlet for the clean fluid includes a porous filter housed in an annulus between the central shaft and the inner surface.
3. The separator according to claim 2 , including multiple bearings at different positions along a pump shaft, with different fluid pressures at each bearing.
4. The separator according to claim 3 , wherein lee choke valves are used to choke the fluid pressure at each bearing.
5. The separator according to claim 4 , wherein the lee choke valves have a different choke value to match the external pressure around the bearing at its location in the pump, the internal pressure inside the central shaft being sufficient to flush the bearing at the pump outlet which will be the greatest differential pressure.
6. The separator according to claim 1 , further including a fluid path through the central shaft, and including a pump in communication with a gallery beneath the porous filter, the pump urging the cleaned fluid up through the central shaft.
7. The separator according to claim 6 , wherein the cleaned fluid is energised by a screw pump.
8. The separator according to claim 1 , wherein a rotating shaft drives the separator.
9. The separator according to claim 1 , further including a fluid path through multiple bearings.
10. The separator according to claim 1 , wherein there the cleaned fluid lubricates and flushes the bearings.
11. The separator according to claim 1 , wherein a porous filter is used as a secondary filter.