Import Api Casing Couplings-Non Upset End — Buy in wholesale FOB from Supplier in China

API Casing Couplings with Non Upset End (NUE) are designed for connecting casing joints in oil and gas wells without external upsetting of the pipe ends. This design maintains the internal diameter of the casing, improving flow efficiency. Threeway Steel Co., Ltd. offers NUE couplings compatible with both seamless and stainless steel pipes, with outer diameters and sizes matching standard API casing specifications. The couplings are manufactured to API standards, ensuring dimensional accuracy and thread integrity for reliable field performance.

The material composition typically includes carbon or alloy steel grades such as API J55, K55, N80, L80, C90, T95, or P110, selected based on the well conditions and depth requirements. NUE couplings share dimensional similarities with External Upset End (EUE) couplings but differ in the absence of upset ends, which reduces stress concentration points. Standard surface treatments include phosphate coating or thread compound application to enhance corrosion resistance and ensure a tight seal under downhole pressures.

These couplings are primarily used in onshore and offshore drilling operations where maintaining the internal diameter of the casing string is critical for production efficiency. Buyers typically include oilfield service companies, drilling contractors, and EPC firms involved in well construction. Trade terms such as MOQ, packaging, and lead time should be confirmed directly with Threeway Steel Co., Ltd., as these details are not specified in the listing. The couplings are supplied in bulk, often palletized, with protective end caps to prevent thread damage during transit.

Threeway Steel Co., Ltd. is based in Changsha, Hunan Province, China, with its office located at the 22nd Floor, Royal Wing Tower, Long Champ. The company operates as an imported-tier supplier in the oilfield equipment sector, specializing in API-standard products such as casing couplings. Its profile indicates a focus on providing technical products for downstream oil and gas applications, though no response rate or verification signals are currently listed.

The supplier’s description highlights its expertise in API casing couplings, including the Non Upset End (NUE) variant, which it distinguishes from External Upset End (EUE) couplings in terms of application and design. Threeway Steel Co., Ltd. positions itself as a knowledgeable provider, offering guidance on selecting the appropriate coupling type for specific use cases. However, the listing does not provide details on certifications, production capacity, or client history, so buyers are advised to request this information directly.