Integration of in-well wetmate esp motor connector with high pressure hydraulic line

Abstract

A method includes placing an apparatus in a subsea wellbore ( 102 ), and hydraulically connecting the apparatus with an external hydraulic fluid source ( 107 ). The apparatus of this method includes a pump ( 103 ), a motor ( 105 ), a pressure intensifier ( 109 ), and a hydraulic fluid port ( 110 ). The motor ( 105 ) is configured to drive the pump ( 103 ). The pressure intensifier ( 109 ) is configured to maintain pressure of the hydraulic fluid in the motor at a predetermined level. The hydraulic fluid port ( 110 ) is configured to provide hydraulic fluid to the pressure intensifier ( 109 ) by mating with the external hydraulic fluid source ( 107 ) when the apparatus is in a hydrocarbon producing wellbore. The apparatus is dimensioned for lowering and retrieving through the string of production tubing ( 112 ).

1 . An apparatus comprising:
 a pump;   a motor configured to drive the pump;   a pressure intensifier configured to maintain pressure of hydraulic fluid in the motor at a predetermined level; and   a hydraulic fluid port configured to provide hydraulic fluid to the pressure intensifier by mating with an external hydraulic fluid source when the apparatus is in a hydrocarbon producing wellbore;   wherein the apparatus is dimensioned for lowering and retrieving through the string of production tubing.   
     
     
         2 . The apparatus of  claim 1 , wherein the source of hydraulic fluid external to the apparatus comprises a hydraulic fluid connector of a string of production tubing in the hydrocarbon producing wellbore. 
     
     
         3 . A method comprising:
 placing an apparatus in a subsea wellbore, wherein the apparatus comprises:   a pump;   a motor configured to drive the pump;   a pressure intensifier configured to maintain pressure of hydraulic fluid in the motor at a predetermined level; and   a hydraulic fluid port configured to provide hydraulic fluid to the pressure intensifier by mating with an external hydraulic fluid source when the apparatus is in a hydrocarbon producing wellbore;   wherein the apparatus is dimensioned for lowering and retrieving through the string of production tubing; and   hydraulically connecting the apparatus with the external hydraulic fluid source.   
     
     
         4 . The method of  claim 3 , wherein hydraulically connecting occurs prior to placing the apparatus. 
     
     
         5 . The method of  claim 3 , wherein hydraulically connecting is accomplished via a hydraulic fluid connector. 
     
     
         6 . The method of  claim 3  further comprising maintaining pressure of the hydraulic fluid in the motor at the predetermined level via the pressure intensifier. 
     
     
         7 . The method of  claim 6 , further comprising providing hydraulic fluid to the pressure intensifier via the hydraulic fluid port. 
     
     
         8 . The method of  claim 7 , wherein providing hydraulic fluid occurs after a determination that the pressure in the pressure intensifier has dropped below an intensifier pressure level. 
     
     
         9 . The method of  claim 3  further comprising using the external hydraulic fluid source to flush the motor. 
     
     
         10 . The method of  claim 8 , wherein providing hydraulic fluid occurs after a determination that the level in the intensifier is low.