Downhole tool for borehole cleaning or for moving fluid in a borehole
First Claim
Patent Images
1. A downhole tool for borehole cleaning or for moving fluid in a borehole, the fluid comprising elements, the elements including solid materials, liquid materials or mixtures thereof present in the borehole, the tool comprising:
- a chamber inlet configured to let fluid into the tool;
a chamber outlet configured to expel solids or liquids or mixtures thereof; and
a tool housing, the tool housing comprising;
a pump arranged in a pump housing, anda driving unit powered by an electrical power source, the driving unit being configured to drive the pump, the pump being arranged between the chamber inlet and the chamber outlet;
wherein the pump comprises at least one rotor unit comprising a plurality of rotor blades having a hydrodynamic profile having a leading edge and a trailing edge, and at least one stator unit comprises a plurality of stator blades having a hydrodynamic profile having a leading and a trailing edge, the at least one rotor unit rotates in relation to the at least one stator unit and the pump is connected with the driving unit in order to rotate the rotor unit, causing the fluid to move from the chamber inlet towards the chamber outlet;
wherein each of the plurality of stator blades has a convex surface arranged such that a chord connecting a leading edge of a respective stator blade with a trailing edge of the respective stator blade is arranged in a non-parallel relationship to a longitudinal axis of the tool; and
wherein the chamber outlet is configured to expel at least the liquids admitted to the tool through the chamber inlet into the surrounding borehole in which the downhole tool is located.
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Abstract
The present invention relates to a downhole tool (1) for borehole cleaning or for moving fluid in a borehole. The tool comprises a tool housing (29), a chamber inlet (6) and a chamber outlet (36), and the tool housing comprises a pump (8) arranged in a pump housing (4) and a driving unit powered by an electrical conducting means for driving the pump.
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Citations
18 Claims
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1. A downhole tool for borehole cleaning or for moving fluid in a borehole, the fluid comprising elements, the elements including solid materials, liquid materials or mixtures thereof present in the borehole, the tool comprising:
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a chamber inlet configured to let fluid into the tool; a chamber outlet configured to expel solids or liquids or mixtures thereof; and a tool housing, the tool housing comprising; a pump arranged in a pump housing, and a driving unit powered by an electrical power source, the driving unit being configured to drive the pump, the pump being arranged between the chamber inlet and the chamber outlet; wherein the pump comprises at least one rotor unit comprising a plurality of rotor blades having a hydrodynamic profile having a leading edge and a trailing edge, and at least one stator unit comprises a plurality of stator blades having a hydrodynamic profile having a leading and a trailing edge, the at least one rotor unit rotates in relation to the at least one stator unit and the pump is connected with the driving unit in order to rotate the rotor unit, causing the fluid to move from the chamber inlet towards the chamber outlet; wherein each of the plurality of stator blades has a convex surface arranged such that a chord connecting a leading edge of a respective stator blade with a trailing edge of the respective stator blade is arranged in a non-parallel relationship to a longitudinal axis of the tool; and wherein the chamber outlet is configured to expel at least the liquids admitted to the tool through the chamber inlet into the surrounding borehole in which the downhole tool is located. - 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