Patent ID: 6293358
Filing Date: 2001-09-25
Classification: E21B,F01C

Abstract:
A Moineau machine comprising:an outer tubular member (1);an inner tubular member (2) positioned in said outer tubular member (1) and moveable in an axial direction of said outer tubular member (1) but axially securable in a desired position relative to said outer tubular member (1);said inner tubular member (2) having an inner surface;an inner elastomer lining (3) fixedly connected to said inner surface, said lining (3) having an inner helical surface;a helical rotor (5) rotatably mounted in said inner tubular member (2);said inner tubular member (2) having a wall thickness smaller than a wall thickness of said outer tubular member (1);said inner tubular member (2) having opposed ends, wherein at least one of said opposed ends is sealed relative to an inner wall of said outer tubular member (1);said outer tubular member (1) having arresting devices at said inner wall for arresting said inner tubular member (2) in said desired position, said arresting devices selected from the group consisting of stops, locking elements, and radially in wardly projecting bolts;said inner tubular member (2) having radially outwardly extending bulges (2') and wherein said radially inwardly projecting bolts (9) contact two neighboring ones of said bulges (2').