Sucker rod centralizer

Details Sucker rod centralizer Sucker rod centralizer

1987-09-21

1989-10-03

Kisliuk, Bruce M.

Wells

Guide for device or conduit

On sucker or pump rod

175325, E21B 1710

Patent

active

048710202

ABSTRACT:
The present invention relates to a device for centralizing at least one sucker rod within a production pipe and for reducing frictional forces between the pipe and the sucker rod(s). The device comprises an elongate, substantially cylindrical body member, a plurality of slots within the member and a rotatable member in each slot. Each rotatable member is formed from a metallic material having a hardness of at least about 50 Brinnel Hardness, less than the hardness of the material forming the production pipe tubing. In a preferred embodiment, the slots and the rotatable members are in a helical array.

REFERENCES:
patent: 713723 (1902-11-01), Vinzent
patent: 1281756 (1918-10-01), Black
patent: 1827835 (1931-10-01), Black
patent: 2198720 (1940-04-01), Edgecomb et al.
patent: 2466239 (1949-04-01), Holcombe
patent: 2601478 (1952-06-01), Weir
patent: 2722462 (1955-11-01), Tschirley
patent: 3938853 (1976-02-01), Jurgens et al.
patent: 4557327 (1985-12-01), Kinley et al.
patent: 4620802 (1986-11-01), Harrell
patent: 4621690 (1986-11-01), Klyne

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