System For Pumping Liquid Media From A Bore And Method For Installing A Pump Unit Designed As A Progressive Cavity Pump In A Bore

Abstract

A system for pumping liquid media from a bore. The system includes a riser pipe, which extends at least approximately in a longitudinal direction of the bore, and a pump unit, which is accommodated in the riser pipe and which has a stator and a rotor. The system also includes a drive train connected to the rotor for eccentrically moving the rotor. The system also includes an adapter unit, which is connected to the stator and which holds the stator substantially stationary in the riser pipe by clamping contact with the riser pipe. The invention further relates to a method for installing a pump unit designed as a progressive cavity pump in a bore.

1 . A system for pumping liquid media from a bore, comprising
 a riser pipe, which extends at least approximately in a longitudinal direction of the bore,   a pump unit accommodated in the riser pipe with a stator, a rotor and a drive train connected to the rotor for eccentrically moving the rotor and   an adapter unit, which is connected to the stator and which holds the stator substantially stationary in the riser pipe by clamping contact with the riser pipe.   
     
     
         2 . The system according to  claim 1 , wherein the adapter unit comprises a partial region with an increased cross-sectional diameter (D 15 ) and at least one spring element, which is brought into clamping contact with the riser pipe and/or with a locating sleeve disposed in the riser pipe. 
     
     
         3 . The system according to  claim 1 , wherein the adapter unit is constituted as a hollow body and the drive train of the pump unit extends completely through the adapter unit. 
     
     
         4 . The system according to  claim 3 , wherein at least some parts of the adapter unit are coupled with free end of the stator. 
     
     
         5 . The system according to  claim 4 , wherein the adapter unit sits on the respective free end of the stator and wherein the partial region with the increased cross-sectional diameter (D 15 ) and the at least one spring element is brought into clamping contact with the riser pipe and/or with a locating sleeve disposed in the riser pipe. 
     
     
         6 . The system according to  claim 5 , wherein the respective free end of the stator on which the adapter unit sits tapers at least in sections in the direction away from the stator. 
     
     
         7 . The system according  claim 1 , wherein the adapter unit comprises a perforation extending in a longitudinal direction of the adapter unit, said perforation being aligned with the stator in the pumping direction of the liquid medium. 
     
     
         8 . The system according to  claim 2 , wherein the outer lateral surface of the adapter unit is constituted by an elastomer at least in sections and preferably all around the circumference, in particular wherein a seal is constituted by the outer lateral surface of the adapter unit constituted by an elastomer preferably all around the circumference and its contact with the locating sleeve. 
     
     
         9 . The system according to  claim 8 , wherein the outer lateral surface constituted by an elastomer at least in sections and preferably all around the circumference comprises groove-shaped profiling. 
     
     
         10 . The system according to  claim 1 , wherein the adapter unit is constituted in two parts, which second part of the adapter unit sits on the stator and which first part comprises a plurality of spring elements, in particular a plurality of elastic and/or spring-loaded tongues pointing in the direction of the second part, wherein the second part engages with its free end region lying opposite the stator in an internal space of the first part formed by the spring elements and is anchored in the latter and wherein the first part is brought into clamping contact the spring elements with the riser pipe or with a locating sleeve of the riser pipe. 
     
     
         11 . The system according to  claim 10 , wherein the second part comprises a locating region for the free end of the stator, wherein the locating region is constituted corresponding to the shape of the free end of the stator. 
     
     
         12 . The system according to  claim 10 , wherein the first part and the second part each comprise a perforation and the perforation of the first part and the perforation of the second part are aligned with one another. 
     
     
         13 . The system according to  claim 1 , wherein the adapter unit provides an axial guide for the drive train of the pump unit. 
     
     
         14 . A method for installing a pump unit designed as a progressive cavity pump in a bore, comprising the following steps:
 uninstalling a pump device in an operative connection with the bore and removal of the pump device from the bore, a riser pipe remaining in the bore,   fastening of an adapter unit or parts of an adapter unit to the free end of a pump unit designed as a progressive cavity pump,   introduction of the pump unit with the adapter unit disposed thereon into the riser pipe, wherein the adapter unit is brought into contact in a clamping manner with a locating sleeve of the riser pipe, so that the pump unit is held substantially stationary in the riser pipe by the adapter unit.   
     
     
         15 . The method according to  claim 14 , wherein the employed adapter unit is constituted in two parts, which second part of the adapter unit sits on the stator and which first part comprises a plurality of spring elements,
 wherein the first part of the adapter unit is introduced into the riser pipe;   wherein the second part of the adapter unit is disposed on and fastened to a free end of a stator of a pump unit;   wherein the pump unit with the second part of the adapter unit is introduced into the riser pipe;   wherein the second part of the adapter unit anchored with the first part of the adapter unit and   wherein the first part is brought by the spring elements into a clamping contact with the riser pipe or with a locating sleeve of the riser pipe.   
     
     
         16 . The system according to  claim 2 , wherein the adapter unit is constituted as a hollow body and the drive train of the pump unit extends completely through the adapter unit. 
     
     
         17 . The system according to  claim 11 , wherein the first part and the second part each comprise a perforation and the perforation of the first part and the perforation of the second part are aligned with one another.