Sucker rod couplings are essential components in rod-pumped applications, connecting sucker rods, polished rods, and sinker bars. These couplings are available in API Class T and SM, ensuring durability and high performance in demanding environments. Manufactured from high-quality carbon steel or alloy steel (AISI 1045, AISI 4135), these couplings offer excellent corrosion resistance, wear resistance, and mechanical strength
Sucker rod couplings are essential components in rod-pumped applications, designed for secure and durable connections between sucker rods, polished rods, and sinker bars. They are made from high-quality carbon steel or alloy steel to ensure superior performance in demanding oilfield operations.
Sucker rod couplings, polished rod couplings, and sub-couplings are crucial for oil extraction operations. These couplings ensure reliable connections between rods of various sizes. They come in two primary grades:
Types of Couplings:
The outer diameter of the sucker rod couplings is available in both full size and slim hole variations.
The main types of sucker rod couplings are sucker rod couplings, polished rod couplings and sub-couplings.
Sucker rod coupling has same box thread size in both end.
Sub-coupling has different box thread size in each end.
Polished rod coupling has the same box thread and vanishes cone on both ends.
All the three types have two classes: class T and class SM.
The outer diameter of the sucker rod couplings has a full size and slim hole types…
| Spec | Internal thread spec | Length | Outside diameter | |
|---|---|---|---|---|
| Full size | Slim hole | |||
| 5/8" | 15/16" | 4" | 38.1mm | 31.8mm |
| 3/4" | 1-1/16" | 4" | 41.3mm | 38.1mm |
| 7/8" | 1-3/16" | 4" | 46mm | 41.3mm |
| 1" | 1-3/8" | 4" | 55.6mm | 50.8mm |
| 1-1/8" | 1-9/16" | 4.5" | 60.33mm | N/M |
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