Method and apparatus for downhole sand clean-out operations...

E - Fixed Constructions – 21 – B

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Details

E21B 37/00 (2006.01) E21B 17/10 (2006.01) E21B 21/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2149591

A device to be connected to the lower end of a tubing string for removing sand or other debris from oil producing formations below a surface, the device comprising a combination of a thrust and rotational bearing assembly, a rotationally driven downhole pump comprising a rotor and a stator to provide hydraulic energy to lift fluid to the surface, a transfer chamber secured to the pump providing fluid communication between the pump and the tubing string to direct fluid from the pump to enter the string, a nose section secured to the pump rotor and constructed so that sand is mixed with wellbore fluid, a guide to take the mixture to the pump and an anti-rotation device secured to the pump constructed so as to prevent rotation of the pump stator while allowing axial movement of the pump.

Dispositif à raccorder à l'extrémité inférieure d'une colonne de production afin de retirer le sable et les autres débris des formations productives de pétrole sous une surface, le dispositif comprend un ensemble constitué d'un palier de butée et d'un palier de roulement; une pompe de fond entraînée par rotation munie d'un rotor et d'un stator pour fournir l'énergie hydraulique afin d'élever le fluide jusqu'à la surface; une chambre de transfert fixée à la pompe permettant la circulation du fluide entre la pompe et la colonne de production pour diriger le fluide provenant de la pompe afin qu'il pénètre dans la colonne de production; une section avant fixée au rotor de la pompe et fabriquée de manière que le sable se mélange au fluide dans le puits; un élément de guidage pour amener le mélange à la pompe et un dispositif antirotation fixé à la pompe de façon à empêcher la rotation du stator de la pompe tout en permettant le mouvement axial de cette dernière.

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