Progressing cavity pump production tubing having permanent...

Details Progressing cavity pump production tubing having permanent... Progressing cavity pump production tubing having permanent...

F - Mech Eng,Light,Heat,Weapons

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F04C 2/107 (2006.01) B29C 33/30 (2006.01) B29C 45/14 (2006.01) B29C 45/36 (2006.01) B29D 23/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2309286

A method of limiting core deflection in the manufacture of relatively long sections of progressing cavity pump production tubing wherein a core is held within the bore of a length of tubular casing to provide a form for the molding of a stator element. The core is centered and stabilized within the tubular casing at selected intervals prior to the injection of elastomeric material by one or more core centering bearings. The bearings are effective to prevent core deflection during manufacture and, rather than being removed after curing of the stator, are left in the casing to function as rotor bearings for the progressing cavity pump. The bearings, themselves encapsulated by elastomeric material during the manufacturing process, help maintain the rotor in optimal alignment within the production tubing thereby benefitting pump performance and longevity.

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