Flush-by system

Abstract

A flushing apparatus for flushing a downhole pump having a rotor and a stator includes a lifting device forming part of a wellhead assembly. The lifting device is attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator. There is a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.

1 . A flushing apparatus for flushing a downhole pump having a rotor and a stator, the flushing apparatus comprising:
 a lifting device forming part of a wellhead assembly, the lifting device being attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator; and   a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.   
   
   
       2 . The flushing apparatus of  claim 1 , wherein the lifting device and the source of fluid are controlled by a controller. 
   
   
       3 . The flushing apparatus of  claim 2 , wherein the controller is activated manually. 
   
   
       4 . The flushing apparatus of  claim 2 , wherein the controller is activated in response to an input signal, the input signal being generated by a condition of high torque, low efficiency, low flow rate, base solids and water, time, completion of coil tubing work, or completion of well maintenance. 
   
   
       5 . The flushing apparatus of  claim 2 , wherein the controller receives input signals locally or by a remote input. 
   
   
       6 . The flushing apparatus of  claim 1 , wherein the lifting device is a telescopic ram. 
   
   
       7 . The flushing apparatus of  claim 1 , wherein the lifting device is hydraulically driven. 
   
   
       8 . The flushing apparatus of claim I, wherein the lifting device is gear driven.