motor of the pumping units. API Spec 11B standard sucker rods are designed to be used with moderate 

to heavy loads in non-corrosive or effectively inhibited wells.

 

We cooperate with international leading manufacturers to produce several sorts of sucker rod, mix together 

with special material & technology developed by YANTAI SANMON MECHINERY EQUIPMENT CO.,LTD to 

produce Grade C, D, HL, HY, K, KD with different properties, included special High Strength and Surface 

Spray Metal, used in major oilfield home and abroad. Sucker rods uses high quality steel as the material, 

100% be straighten, flaw detection and shot blasted, forged by the close-loop advanced technology, using 

advanced heat-treatment for rod, and the ultrasonic frequency surface quenching, and completed with 

advanced fluorescent magnetic fault detection &  imported Eddy Current Inspection instrument to inspect 

sucker rod head and the rod body, the quality of the product is being assured. The capacity of Sucker rod is 

100000 meters per month making good returns through high added value. Meanwhile, Polished rod, Pony rod, 

Sinker Bar are also available with similar process and technical.

 

Manufacturing Process: 

 

1. Rod Bar The incoming rod bars are inspected for any damage, fault and discontinuities. Before arranging

    the rod bars for production process, carry out chemical composition testing, dimensional inspection & 

    surface quality inspection. High quality standard is maintained at various stage inspections. 

 

2. Manufacturing Rod bars are manufactured from hot rolled alloy steel. Rod bars are machine straightened 

    and cold drawn to the required size. The rod bar ends are hot forged according to API designed sizes.The 

    rods are then heat treated over the full length. As per requirement of mechanical properties, the rods are 

    normalized and tempered to the specified level or quenched and tempered to the required hardness and

    strength. Care is taken to achieve metallographic structure with no residual stresses in the rod. A sample 

    specimen is cut from the heat treated material and is tested for ultimate tensile strength, yield strength and

    elongation. The rod is then again checked for straightness. The forged ends are properly aligned with its 

    body. Rods are cleaned by shot-blasting to remove any scale and oxidation. The forged ends are machined 

    on C. N. C. Lathe machines as per API dimensions and checked with API approved gauges. 

 

3. Packaging and Storage The sucker rods are then coated with rust inhibitors and carefully palletized in bundles 

    for safe transport and handling.