초록 ▼

A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter ba

A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter balance holes that typically range between 45% to 100% of the width between each split vane. The gas-handling centrifugal pump can be used as a charge pump for a centrifugal pump in a lower tandem configuration within a well.

대표청구항 ▼

A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter ba

A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter balance holes that typically range between 45% to 100% of the width between each split vane. The gas-handling centrifugal pump can be used as a charge pump for a centrifugal pump in a lower tandem configuration within a well. n translation relative to the frame by activation of the first motor. 2. The system according to claim 1, wherein an axial internal threading is formed in the hub and extended axially by a smooth bore, wherein said drive shaft has a smooth bearing surface axially extended from said threaded part thereof, said bearing surface engaged in the smooth bore of the hub, wherein said brake gear has a stopper of a synthetic material engaged in a radial hole formed in the hub and opening into an axial bore, said stopper being held under pressure against the smooth bearing surface of the drive shaft. 3. The system according to claim 2, wherein said stopper is kept against the drive shaft by an axial thrust exerted by a screw engaged by screwing into an internal threading formed the radial hole. 4. The system according to claim 1, wherein said drive shaft has a free end outside of said hub, said drive shaft has an abutment forming a shoulder in order to limit a linear course of the arm. 5. The system according to claim 1, wherein said means for locking comprises a locking pin mounted mobile in translation in a guide bearing, said guide bearing united to make a solid piece with the frame, said means for locking further comprising a motor instrument for activating the locking pin, said motor instrument controlled by the control and command unit, said motor instrument having an output shaft for linear displacement which is united to make a solid piece with the locking pin, said locking pin engages in a hole formed in the hub ehn the motor instrument is activated. 6. The system according to claim 5, wherein said output shaft for linear displacement and the locking pin are united with each other by a semi-rigid connection. 7. The system according to claim 6, wherein said shaft for linear displacement and the locking pin are axially shifted forward relative to each other and the semi-rigid connection is in the form of a fork formed in a disc affixed in a lower part of a locking pin or in the form of a circular groove hollowed in a cylindrical joining piece affixed to the output shaft of the motor instrument, the fork being engaged in the circular groove of the cylindrical joining piece. 8. The system according to claim 1, further comprising a means for detecting the locking of the manipulator arm in rotation, said means for detecting being activated when the means for locking is deactivated. 9. The system according to claim 1, wherein one of the running gears is coupled to a second motor, said second motor being controlled by the command and control unit. 10. The system according to claim 9, said running gears comprising three running gears, a first and a second running gear of said three running gears are placed on one side of the frame and a third running gear of said three running gears is placed on another side of the frame. 11. The system according to claim 10, wherein said third running gear is coupled to the output shaft of the second motor. 12. The system according to claim 9, further comprising an incremental coder coupled to an output shaft of the second motor. 13. The system according to claim 10, wherein said third running gear is comprised of a catch gear and meshes with a rack formed on a track on which the manipulator robot maneuvers. 14. The system according to claim 13, wherein said first and second running gears are comprised of rollers with a triangular groove and engaged on a guide rail having a triangular cross-section formed on the track. 15. The system according to claim 9, wherein said second motor makes a solid piece with a plate mounted in rotation along a vertical axis, the plate being coupled to a vertical output shaft of a third motor. 16. The system according to claim 1, wherein said hub further comprises at least one initialization reference mark facing a trajectory of which a detector means is arranged that is electrically connected to said command and control unit, said detector means for supplying a signal fo