Projects Detail
API 5CT Sour Service Couplings: A 500 MT Canada Case Study
The Challenge: Sour Wells & A Tight Winter Window
Our client, a prominent OCTG distributor in Western Canada, supplies casing and tubing to operators in one of the world's most demanding environments. In sour gas wells, a coupling is not merely a connector—it is the critical component that can compromise an entire string.
The project demanded strict compliance: NACE MR0175 / ISO 15156 hardness control for L80 Type 1 and C90 grades, phosphate-coated threads, and complete per-heat traceability with EN 10204 3.1 certification. With deliveries tied to a tight winter drilling program, there was zero margin for delays.
Our Solution: The China Factory Advantage
Fit-for-Purpose Metallurgy: As a dedicated China OCTG factory, we supplied L80 Type 1 and C90 specifically for their sour wells, verifying hardness strictly against NACE standards.
Controlled Sourcing & Testing: Sourced from API-licensed mills with quench-and-temper capabilities. Every heat underwent comprehensive mechanical and chemical testing in our facility.
Precision Machining & API 5B Gauging: Threads were machined and verified using API 5B master ring and plug gauges. A comprehensive gauge report was issued with every shipment.
Third-Party Trust: Pre-shipment inspection was witnessed by SGS against an agreed Inspection and Test Plan (ITP).
Engineered for Cold-Climate Logistics: We engineered the export packaging specifically for harsh Canadian winters. Heavy-duty bundling, end caps, and a strategic loading plan ensured threads remained intact through ocean transit and inland haulage.
The Result
We successfully manufactured and shipped 500 MT across 6 releases with zero thread rejections upon arrival at the customer’s yard in Canada. The distributor consolidated its coupling supply with our factory and continues to place repeat orders.
Why It Matters
"A coupling failure in a sour well isn't just a commercial problem—it's a critical safety issue. We supplied the exact grade the well required, fully verified, gauged, and certified before it left our facility."
Value Highlights
Direct Factory Supply: Competitive pricing with no middleman markups.
API-Licensed Sourcing: Full heat-level traceability with EN 10204 3.1 certification.
Sour-Service Compliance: Documented hardness control for NACE MR0175 / ISO 15156.
API 5B Verified: Master gauge reports issued with every release.
Flawless Export Logistics: Engineered packaging for cold-climate transit.
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