What payment methods do you accept?

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

Where is the company located and what are the shipping ports?

Based in Tianjin, China, we ship from Tianjin, Qingdao, and Shanghai ports.

What is the main advantage of this casing coupling design?

The conical thread design effectively relieves stress concentration and prevents fatigue fracture.

API 5CT Btc Buttress Thread Casing Coupling for Oil Well Casing

Name: API 5CT Btc Buttress Thread Casing Coupling for Oil Well Casing
Brand: Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.
SKU: 2175619822

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

US$10.00

1-99 Pieces

US$9.00

100+ Pieces

Product profile

After-sales Service

Six Months

Warranty

Six Months

Specification

18-5/8

Model NO.

5-1/2

Trademark

eastlong

Origin

China

Key features

Fatigue Fracture Resistance: Conical thread design relieves stress concentration to prevent fatigue fracture.

API 5CT Certification: Authorized by American Petroleum Institute ensuring industry standard compliance.

ISO 9001 Quality System: Certified quality management system for consistent product reliability.

Six Months Warranty: Comprehensive warranty coverage for mechanical defects and performance.

Multiple Steel Grades: Available in J55, K55, N80, L80, and P110 to suit various well conditions.

Fast Lead Time: Peak and off-peak season production completed within 15 working days.

Comprehensive After-Sales: Six months of dedicated after-sales service support included.

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

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.