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The polished rod (PR) is intended for the connection of the rods strings using a casing head stuffing box with a pumping unit and the transmission of the forth or rotational movement from the PCP drivehead to the well pump during oil extraction. The rods are the metal core with round section.
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Standard
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API Spec 11B
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Dimension-type
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PR 1 1/8
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PR 1 1/4
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PR 1 1/2
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Diameter, mm
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28,58
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31,8
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38,1
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Roughness of effective area
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Ra 0,2...0,8
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Length, mm
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Any till 9000 mm according requirements of client
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Dimension-type of connected rod
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RP 3/4
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RP 7/8
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RP 1
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Steel group
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Tensile strength
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Carbonaceous
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617...823
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Alloyed
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657...1098
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