Centralizer for sucker rod strings

Details Centralizer for sucker rod strings Centralizer for sucker rod strings

E - Fixed Constructions

21

B

E21B 17/10 (2006.01)

Patent

CA 2315730

A centralizer for sucker rod strings is disclosed. The invention has particular use for centralizing sucker rods in a tubing string in connection with a downhole rotary pump driven by a rotating rod string. The single piece, double box centralizer has internally threaded ends for attachment to the threaded pin ends of sucker rod string components. A central shaft portion of the centralizer has a reduced diameter over which a centralizer sleeve is placed. The sleeve is kept in place by shoulders of the larger diameter ends of the centralizer. The centralizer sleeve may be a single piece snap-on type made of a flexible material, or the sleeve can be made up of two or more pieces which snap together.

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