Latching mechanism for changing pump size

Details Latching mechanism for changing pump size Latching mechanism for changing pump size

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 23/04 (2006.01) E21B 43/12 (2006.01) F04B 47/06 (2006.01) F04D 13/10 (2006.01) F04D 13/12 (2006.01)

Patent

CA 2712882

A latching mechanism for selectively disengaging an upper pump from a motor in an ESP. The latching mechanism comprises barbs formed on an upper end of an upper shaft that are engaged by a tool to lift the upper shaft until a lower end of the upper shaft disengages from an upper end of a motor shaft. When the upper pump is disengaged from the motor shaft, only a lower pump is driven by the motor and flow of well fluid is circulated past the disengaged upper pump via a bypass line. The upper pump shaft may reengage the motor shaft if additional lift is required.

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