Patent ID: 7730938
Filing Date: 2010-06-08
Classification: E21B,F16L,Y10T

Abstract:
1. A continuous sucker rod string, with no interconnecting end fittings, capable of enabling the actuation of a sub-surface pump by a surface pump drive unit, for pumping from a well to the surface comprising: a continuous sucker rod, having a first end, a second end, and a non-round cross-sectional configuration, wherein said continuous sucker rod can be connected between a surface pump drive and a sub-surface pump; said continuous sucker rod string comprising a first end fitting having first and second ends, said second end, of the first end fitting, being fixedly attached to said first end of said sucker rod; said continuous sucker rod string further comprising a second end fitting having first and second ends, wherein said second end, of the second end fitting, being fixedly attached to said second end of said sucker rod, said first end fitting and said second end fitting each comprising a rod receptacle, at said respective second ends of the end fittings, having a closed axially inner end and an open axially outer end, and an interior wall surface defining at least one outwardly converging tapered surface defining a wedge shaped cavity approaching the rod asymptotically and being tapered to be of decreasing diameter towards said open end; and wherein said at least one cavity is filled with a body of initially flowable adhesive that cures to bond to each of said outer surface of said first end and said second end of said rod and to solidify to form at least one wedge to cooperate with said tapered surface to retain said rod in each said fitting.