E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
103/142, 166/26
E21B 17/10 (2006.01)
Patent
CA 1328198
WELL TOOL Abstract Of The Invention A centralizer for pump rod string which minimizes the resistence offered thereby to flow of well fluids therepast having two pairs of longitu- dinally and circumferentially spaced radially outwardly extending ribs.
585942
Blake Cassels & Graydon Llp
Sable Donald E.
LandOfFree
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