METHODS FOR REPLACING PIN ENDS AND REPAIRING COATINGS ON COATED CONTINUOUS SUCKER RODS
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United States of America Patent
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Feb 28, 2014
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Feb 28, 2014
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Abstract
In a method for repairing a fractured coated continuous sucker rod, the pin end segment of the broken rod is discarded, the remaining rod is cut off, and the existing rod coating is trimmed back from the rod cut-off point. A replacement pin end, incorporating a rod portion and an upset pin end, is welded to the cut-off end of the sucker rod. A resilient cylindrical repair sleeve with a longitudinal slit is spread open and urged by radial force over and around the rod portion of the replacement pin end and the adjoining exposed portion of the sucker rod. Using an appropriate fusing apparatus, the edges of the repair sleeve's longitudinal slit are then fused together, and one end of the sleeve is circumferentially fused to the trimmed-back existing coating. Repair sleeves can also be used to repair damaged sections of coating on unfractured sucker rods.
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