Import 3-1/2" Eue P110 Tubing Coupling — Buy in wholesale FOB from Supplier in China

This 3-1/2\" EUE P110 tubing coupling is a threaded connection manufactured to API 5CT specifications for joining two sections of tubing in oil and gas well completions. The P110 grade denotes a quenched and tempered carbon steel with a minimum yield strength of 110,000 psi, placing it in the higher-strength category of API tubing grades. The EUE (External Upset End) thread profile provides enhanced thread engagement and sealing capacity compared to non-upset connections. Dongying Lake Petroleum Technology Co., Ltd supplies this coupling from Huanghe Road, Dongying, a city located in China's Shandong Province oilfield equipment cluster.

The coupling body is machined from seamless steel pipe conforming to P110 chemistry requirements, with controlled carbon, manganese and chromium content to achieve the specified mechanical properties after heat treatment. Thread forms are cut as female threads to mate with male EUE threads on tubing pup joints. API Spec 5CT mandates dimensional tolerances on thread pitch diameter, ovality, thread height and length of engagement. Standard coupling length for 3-1/2\" EUE is typically 6-9 inches depending on the coupling type and weight designation. The P110 grade offers superior collapse resistance and tensile strength for deeper or higher-pressure well environments where lower grades such as J55 or N80 would be insufficient.

Buyers for this coupling include oilfield service companies, drilling contractors and national oil companies procuring completion equipment for production tubing strings. Typical applications include standard oil and gas producers, water injection wells and select gas well completions where P110 grade is specified in the well design. The coupling is normally supplied with thread protectors and may be coated with phosphate, copper or organic thread compound depending on customer specification. Buyers should confirm with Dongying Lake Petroleum Technology Co., Ltd whether the coupling is supplied as API round thread or buttress thread variant, as well as verifying the exact thread compound and surface finish requirements for their operating environment.

Dongying Lake Petroleum Technology Co., Ltd is located at Huanghe Road, Dongying 257000, China, positioning it within the Dongying oilfield equipment manufacturing hub near the Shengli oilfield. The company's trust tier is classified as harbor, and its response rate is recorded at 0.00 percent with zero average response hours, indicating minimal engagement data is currently available through this channel. The supplier tier is listed as imported, suggesting the business profile was established through import records or third-party data sources rather than direct platform registration. No verified staff count, annual revenue, year of establishment, or specific factory capacity details are present in the available profile information.

The business address places it in Dongying's Huanghe Road area, a zone with concentration of petroleum machinery manufacturers serving domestic and export markets for tubing, casing and associated downhole equipment. The listing focuses specifically on API tubing couplings, indicating specialisation in threaded connection components rather than broad-scope oilfield supply. Buyers should conduct independent verification of the company's manufacturing credentials, quality management system certification and API license status before placing orders, as these are not confirmed in the source data. Direct communication with the supplier remains essential to establish production capacity, inspection protocols and documentation capabilities.