COMPOSITE SUCKER ROD ASSEMBLY MADE BY RESIN INFUSION
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United States of America Patent
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May 4, 2017
app pub date -
Oct 28, 2016
filing date -
Oct 29, 2015
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Abstract
A composite sucker rod assembly is provided for use in down-hole wells. The sucker rod assembly includes a plurality of wound fiber strength elements that are drawn into an in-situ mold tube or clamshell and resin-infused in conjunction with creating a conical wedge terminus connection for at least one end-fitting. Each terminus fitting has a tapered cavity with a proximal opening to receive the composite material. The cavity is tapered so as to flare outwardly from said cavity's proximal opening toward the cavity's distal end. A two-piece cruciform or single piece pin insert interlocks with the wound fiber elements and the terminus fitting to form a high strength connection. The assembly is tensioned prior to infusing and curing the resin matrix for the composite. The mid-span of the sucker rod or tension member can be molded in an oval, elliptical or airfoil shape by various means.
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