What payment methods do you accept?

We accept LC, T/T, PayPal, and Western Union for international commercial transactions.

Where are your main export markets?

Our products are exported to 31 countries and regions, including North America, South America, Europe, Asia, Africa, and the Middle East.

What types of threads are supported?

We support Casing coupling threads (STC, LTC, BTC) and Tubing coupling threads (EUE, NUE), as well as premium threads like Vam Top and TPCQ.

Oil Well API 5CT J55 3 1/2 Eue Tubing Coupling

Name: Oil Well API 5CT J55 3 1/2 Eue Tubing Coupling
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2095322382

Tianjin, ChinaTianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.

US$2.36

50 Pieces

Sample price:US$30.00/piece.Request sample

Product profile

Warranty

1year

Name

Oil Well API 5CT J55 3 1/2 Eue Tubing Coupling

Thread

EU Nu Bc LC Sc

Model NO.

3 1/2

Grade

K55 J55 L80 N80 P110

Usage

Oil Pipe

Transport Package

Wooden Box

Trademark

EASTLONG

Origin

Puyang China

Production Capacity

5000 PCS One Day

Key features

API 5CT Certified Quality: Obtained API 5CT certificate authorized by American Petroleum Institute and BV France quality supplier assessment.

Comprehensive ISO Certifications: Passed ISO9001, ISO14001, ISO45001, and HSE system certifications for quality and safety management.

Wide Grade and Size Range: Available in J55, K55, N80, L80, P110 grades with OD ranging from 2-3/8 to 20 inches.

Global Export Experience: Products exported to 31 countries including USA, Russia, and UAE with established international trade.

Fast Lead Time Delivery: Average lead time within 15 workdays for both peak and off-season periods.

Flexible Payment Terms: Accepts LC, T/T, PayPal, and Western Union for convenient international transactions.

Professional R&D Team: Backed by 46 engineers and over 50 independent intellectual property rights in petroleum tools.

Easy Maintenance Design: Threaded connection design allows for easy repair or replacement of damaged pipes.

Company profile

Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.Tianjin, China

Business Type: Manufacturer/FactoryExport Year: 2019-06-07Nearest Port: TIANJIN PORT, QINGDAO PORT, SHANGHAI PORTAverage Response Time: ≤15hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CIF, DDP

AI-Powered supplier vetting

SummaryTianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd. is a China-based manufacturer founded in 1999, focused on oil pipes, pipe fittings, drilling and production tools, and petroleum automation equipment. The supplier reports ISO 9001 and ISO 14001 certification, 10 production lines, 11–20 years of R&D engineer experience, and 11–20 quality-control staff. It states that its capabilities cover design, development, manufacturing, testing, experimentation, and full-cycle service, supported by more than 30 independent intellectual property rights and an intelligent workshop. The company exports to broad global markets and reports export activity since 2019, but the provided information does not identify specific customer cases or independently verify the stated capabilities.

Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory and a limited company based in Tianjin, China. Its stated business focuses on petroleum equipment, oil pipes, pipe fittings, drilling and production tools, and automation equipment, matching the listed industrial product categories.

CertificationsThe supplier reports holding ISO 14001 and ISO 9001 management-system certifications. These are explicit certification records in the provided data, although certificate scope and validity dates are not given.

R&D capabilityThe supplier reports more than 30 independent intellectual property rights, an intelligent workshop, numerical-control automation equipment capabilities, an e-commerce platform, and recognition as a national science and technology-based small and medium-sized enterprise. These statements provide explicit evidence of innovation-related infrastructure and activity.

Production capacityThe supplier describes an integrated chain covering design, development, manufacturing, testing, and experimentation; operates 10 production lines; and has an intelligent workshop. It also reports oil equipment and pipe-related manufacturing experience, with stated order fulfillment within 15 workdays in both off-peak and peak seasons, supporting a positive production-capability assessment.

Customization capabilityThe stated full-cycle integration of design, development, manufacturing, testing, and experimentation, together with numerical-control automation equipment and an intelligent manufacturing model, indicates the ability to develop and manufacture tailored petroleum equipment. However, no specific customized project examples, engineering-change process, or minimum-order requirements are provided.

Product Q&A

Q:What grades of tubing coupling are available?

We offer multiple grades including J55, K55, N80-1, N80, L80-1, L80, and P110 to meet various oil well requirements.

Q:What are the available size ranges for the coupling?

Outer Diameter ranges from 2-3/8 to 4-1/2 inches for tubing and 4-1/2 to 20 inches for casing, with specific lengths provided for each.

Q:Does the product have API certification?

Yes, the company obtained the API 5CT certificate authorized by the American Petroleum Institute in 2007.

Q:What is the warranty period for this product?

The product comes with a 1-year warranty coverage.

Q:What are the lead times for production?

The average lead time is within 15 workdays, applicable to both peak season and off-season periods.

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Oil Well API 5CT J55 3 1/2 Eue Tubing Coupling