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Tianjin Soright Technology development co., ltd supply high quality pony rods in many different specification.Pony rods are used to adjust the length of sucker rod string in oil well. the standard is API 11B.
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The sucker rod coupling have the same box thread size in each end are used for connecting sucker rod and/or pony rod, and/or sinker bars with sucker rod threads.Specification: 5/8”, 3/4”, 7/8”, 1”, 1-1/8Class: T, SM (Spraying Metal)Standard: API 11B