Patent ID: 8062463
Filing Date: 2011-11-22
Classification: E21B,F04B,F16B,Y10T

Abstract:
1. A method for assembling a sucker rod body and end fitting comprising the steps of: providing at least one end fitting having an interior surface and an exterior surface said interior surface defining a rod receptacle having a closed axially inner end and an open axially outer end, said interior surface defining at least one integrally formed, outwardly converging, axially aligned annulus, said annulus approaching the rod asymptotically and being tapered to be of decreasing diameter towards said open end, and defining a transition surface between said annulus and said open end, wherein said transition surface comprises a continuous function surface having no abrupt change in curvature; coating said interior surface of said end fitting so as to prevent bonding with an adhesive; providing an elongate sucker rod body having a longitudinal axis and a non-round uniform cross-sectional configuration in a plane perpendicular to said longitudinal axis, a first end, a second end, and an exterior surface, wherein said at first end and/or second end are configured for mating with said at least one end fitting; removing, at least partially, the exterior surface proximate said first end and/or said second end of said rod body; removing surface contaminants from said first end and/or said second end, of said rod body wherein said removal provides for a better bond; marking said rod body proximate said first end and/or second end at a pre-determined position, wherein said marking provides visual indication of a proper set; inserting adhesive into said rod receptacle of said end fitting; inserting said non-round cross-sectional configuration of said rod body into said adhesive filled end fitting; wherein said end fitting is mounted on said rod body, and wherein mounting said at least one end fitting further comprises the step of flowably inserting a body of an initially flowable adhesive that cures to bond to an outer surface of said first end of said rod and to solidify to form at least one wedge to maintain attachment of said end fitting with said rod; heat treating rod body with end fitting, wherein said heat treatment bonds adhesive to the rod body; and setting the wedges, wherein said setting causes the at least one wedge to create a mechanical stop to prevent the separation of the end fitting from the rod body.