Insertable surface-driven pump

Abstract

Wellbore tubing having an annular seating member and an annular anti-rotation member can be used for one or more types of surface driven submersible pumps. In one embodiment, a stator and a rotor of a surface driven progressing cavity pump can be inserted into the tubing after the tubing is deployed. In one embodiment, a surface driven reciprocating pump can be inserted into the tubing, later withdrawn from the tubing, and then a progressing cavity pump can be inserted into the same tubing.

1 . A system for pumping wellbore fluids, the system comprising:
 a wellbore tubing;   a seating nipple located on the wellbore tubing;   an anti-rotation nipple located on the wellbore tubing;   a surface driven pump having a pump outer diameter and a latch seal, the latch seal sealingly engaging the seating nipple and resisting axial movement in at least one direction when the latch-seal is concentrically located within the seating nipple; and   wherein the surface driven pump can be deployed through tubing and at least a portion of the outer diameter can pass through the anti-rotation nipple.   
     
     
         2 . The system of  claim 1 , wherein the surface driven pump is a reciprocating pump. 
     
     
         3 . The system of  claim 2 , wherein the reciprocating pump is concentrically located within the anti-rotation nipple. 
     
     
         4 . The system of  claim 1 , wherein the surface driven pump is a progressing cavity pump, the progressing cavity pump comprising a rotor and a stator. 
     
     
         5 . The system of  claim 4 , wherein the system further comprises an anti-rotation mechanism connected to the progressing cavity pump, the anti-rotation mechanism engaging the anti-rotation nipple when the anti-rotation mechanism is concentrically located within the anti-rotation nipple. 
     
     
         6 . The system of  claim 4 , wherein the anti-rotation mechanism comprises cantilevered latching fingers, the latching fingers being resilient, each having a base connected to the pump outer diameter and extending to a tip, the tips defining an anti-rotation mechanism outer diameter, the anti-rotation mechanism outer diameter being greater than an inner diameter of the seating nipple wherein the latching fingers are compressible to allow the anti-rotation mechanism to pass through an inner diameter of the seating nipple. 
     
     
         7 . The system of  claim 6 , wherein the anti-rotation nipple comprises a plurality of keys, the keys defining slots therebetween. 
     
     
         8 . The system of  claim 7 , wherein the latching fingers are adapted to compress inwardly upon engaging the keys to allow the anti-rotation mechanism to be concentrically located within the anti-rotation nipple when the fingers are radially aligned with the keys. 
     
     
         9 . A method for pumping wellbore fluid, the method comprising the steps of:
 a wellbore tubing;   connecting a seating nipple to a wellbore tubing;   connecting an anti-rotation nipple to the wellbore tubing;   deploying the seating nipple, anti-rotation nipple, and wellbore tubing into a wellbore;   inserting a surface driven pump through the tubing into the wellbore, the surface driven pump having a latch seal;   latching the latch seal to the seating nipple, thereby preventing axial movement in at least one direction;   sealingly engaging the seating nipple with the latch seal; and   driving the surface driven pump with a motor located on the surface of the earth.   
     
     
         10 . The method of  claim 9 , wherein the step of inserting the surface driven pump further comprises passing at least a portion of the surface driven pump through the anti-rotation nipple. 
     
     
         11 . The method of  claim 10 , wherein the surface driven pump comprises a progressing cavity pump having a stator and a rotor, the stator having a stator housing, and wherein the step of inserting the surface driven pump through the tubing comprises inserting the stator through the tubing after the tubing is inserted into the wellbore. 
     
     
         12 . The method of  claim 11 , wherein the progressing cavity pump comprises an anti-rotation mechanism, the anti-rotation mechanism engaging the anti-rotation nipple to prevent rotary movement of the stator. 
     
     
         13 . The method of  claim 12 , wherein the anti-rotation mechanism comprises fingers, each having a base connected to the stator housing and extending to a tip, the tips defining an anti-rotation mechanism outer diameter, the anti-rotation mechanism outer diameter being greater than an inner diameter of the seating nipple when the fingers are in their natural state, and wherein the step of inserting the surface driven pump through the tubing further comprises the step of compressing the fingers to permit the anti-rotation mechanism to pass through the seating nipple. 
     
     
         14 . The method of  claim 11 , wherein the anti-rotation mechanism comprises a latching finger and the anti-rotation nipple comprises a plurality of keys to define a plurality of slots therebetween, wherein the latching finger is radially located against a key when the progressing cavity pump is inserted and further comprising the step of rotating the rotor of the progressing cavity pump, thereby causing the stator and the anti-rotation mechanism to rotate until the latching finger is radially located within one of the plurality of slots, thereby preventing further rotation of the stator. 
     
     
         15 . The method of  claim 9  wherein the surface driven pump is a reciprocating pump, further comprising the steps of withdrawing the reciprocating pump and inserting a progressing cavity pump. 
     
     
         16 . The method of  claim 15  wherein the tubing remains in place while the reciprocating pump is withdrawn and the progressing cavity pump is inserted. 
     
     
         17 . A system for pumping wellbore fluids, the system comprising:
 a wellbore tubing;   a seating nipple located on the wellbore tubing;   an anti-rotation nipple located on the wellbore tubing;   a progressing cavity pump having a rotor and a stator, the stator located in a stator housing, a latch seal connected to the stator housing, the latch seal sealingly engaging the seating nipple and resisting axial movement in at least one direction when the latch-seal is concentrically located within the seating nipple, and an anti-rotation mechanism, the anti-rotation mechanism comprising a bushing connected to the stator housing and at least one anti-rotation finger connected to the bushing and protruding from a base to a tip, the tip defining an outer diameter of the anti-rotation mechanism; and   wherein the surface driven pump can be deployed through tubing and at least a portion of the outer diameter can pass through the anti-rotation nipple.   
     
     
         18 . The system of  claim 17 , wherein the anti-rotation mechanism engages the anti-rotation nipple when the anti-rotation mechanism is concentrically located within the anti-rotation nipple. 
     
     
         19 . The system of  claim 17 , wherein the anti-rotation nipple comprises a plurality of keys, the keys defining slots therebetween. 
     
     
         20 . The system of  claim 19 , wherein the latching fingers are adapted to compress inwardly upon engaging the keys to allow the anti-rotation mechanism to be concentrically located within the anti-rotation nipple when the fingers are radially aligned with the keys.