E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/00 (2006.01) E21B 17/10 (2006.01)
Patent
CA 2080394
An ultra-high molecular weight polyethylene sucker rod guide for mounting on a sucker rod and minimizing contact between the sucker rod and the tubing which encloses the sucker rod. In a preferred embodiment the sucker rod guide is characterized by polyethylene plastic having an ultra-high molecular weight which exhibits a wet coefficient of friction that is lower than that of metal. In a most preferred embodiment the sucker rod guide is constructed of a self-lubricating, ultra-high molecular weight extruded polyethylene bar stock. The sucker rod guide includes a longitudinal, grooved bore which is undersized with respect to the sucker rod upon which the sucker rod guide is mounted and a tapered body slot which communicates with the bore for inserting the sucker rod guide on a sucker rod at a desired location. Multiple units of the sucker rod guide are attached to the sucker rod string in spaced relationship, in order to radially space the sucker rod string from the tubing, lubricate the reciprocating or spinning action of the sucker rod string and prevent or minimize sucker rod and tubing wear. Various sucker rod guides constructed according to this invention may be slotted to enhance the flow of production fluid and are color-coded according to tubing size for quick identification and installation on sucker rods of various diameter. A method of manufacturing an ultra-high molecular weight polyethylene sucker rod guide, which includes the steps of providing a cylindrical bar of ultra-high molecular weight polyethylene having a selected length, drilling a lonitudinal bore in the bar using a parabolic bit, tapering the ends of the bar and cutting a tapered slot in the bar for mounting the bar on a sucker rod.
Edwards Billy J.
Starks Jimmy A.
Edwards Billy J.
Ridout & Maybee Llp
Starks Jimmy A.
LandOfFree
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