Electric submersible pumps

H - Electricity – 02 – K

Patent

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Details

H02K 5/132 (2006.01) F04D 13/10 (2006.01) H02K 9/19 (2006.01)

Patent

CA 2530162

A downhole electric motor for a submersible pump has at least three phases and comprises a permanent magnet rotor and a stator bearing phase windings (A, B and C) in slots in the stator. Each phase winding (A, B, C) incorporates a coil extending through a respective pair of adjacent stator slots and surrounds a respective portion of the stator between the slots. Furthermore adjacent coils of each pair of phase windings (A, B, C) extend through opposite parts of a respective one of the slots, so that these coils extend alongside one another in the slot, either being separated by a gap through which cooling fluid may be pumped to cool the coils, or being separated by a thermally conductive projection, with which the coils are in thermal contact, extending at least part of the way across the slot. Such a winding arrangement is advantageous in ensuring that the motor has a long life.

La présente invention concerne un moteur électrique de fond de puits destiné à une pompe submersible qui possède au moins trois phases et comprend un rotor à aimant permanent et un stator portant des enroulements de phases (A, B, C) dans des encoches (2206) ménagées dans le stator. Chaque enroulement de phase (A, B, C) incorpore une bobine s'étendant à travers une paire respective d'encoches de stator contiguës (2206) de sorte que ces bobines s'étendent les unes le long des autres dans cette encoche, qu'elles soient séparées par un espace à travers lequel un fluide de refroidissement peut-être pompé pour refroidir cette bobine, ou qu'elles soient séparées par une projection thermiquement conductrice (3110) avec laquelle les bobines sont en contact thermique, s'étendant au moins en partie sur le passage à travers l'encoche. Un tel agencements d'enroulements permet de faire en sorte que ce moteur est une longue durée de vie.

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