Arrangement for hydrocarbon extraction in wells using progressive cavity pumps

Abstract

Arrangement for hydrocarbon extraction in wells using progressive cavity pumps which consists of a rotating tube located inside a fixed tube which extend along the well casing. The rotating tube carries fluid from the bottom of the well to the surface. Between the rotating tube and the fixed tube there is an “O” ring space into which an anti-friction lubricant is injected between the external face of the rotating tube and the internal face of the fixed tube. The bottom end of the rotating tube has a section holding holes through which fluid flows into it, it is connected to the progressive cavity pump by means of a rod, and its top end is connected to a production outlet and to its propelling motor mechanism. The upper section of the fixed tube is connected to an anti-friction lubricant injection pipe in the space left between the rotating and the fixed tubes. This arrangement prevents the wearing out, as a result of friction and corrosion, of conventional tubings used in field wells where fluid extraction is carried out by means of progressive cavity pumps.

1 . A arrangement for hydrocarbon extraction in wells using progressive cavity pumps, developed with the aim of reducing the wearing out as a result of friction and corrosion of conventional tubings used in oil field wells, characterized by comprising a rotating tube which carries fluid from the bottom of the well to the surface located inside a fixed tube along the well casing, and by having a space between such tubes which serves as a container for an anti-friction lubricant between the external face of the rotating tube against the internal face of the fixed tube, the bottom end of the rotating tube has a section holding holes through which fluid flows into it and it is connected to the progressive cavity pump by means of a rod, the top end of the rotating tube is connected to a production outlet and to its propelling motor mechanism, the top end of the fixed tube is connected to an anti-friction lubricant injection pipe in the space left between the rotating and fixed tubes. 
     
     
         2 . The arrangement according to  claim 1 , characterized because the upper section of the rotating tube has a diameter reduction from which such upper section is connected to the production outlet and to the mentioned motor mechanism by means of a swivel. 
     
     
         3 . The arrangement according to  claim 1 , characterized because the rotating tube is made up of a succession of interconnected sections by means of the threaded joints. 
     
     
         4 . The arrangement according to  claim 1 , characterized because the rotating tube is made up of a succession of interconnected sections. 
     
     
         5 . The arrangement according to  claim 1 , characterized because the internal face of the rotating tube is covered by a protective paint coating.