API 6A Certified Casing Head & Casing Head Spool Series

  • Traditional casing head assemblies struggle with inter-string pressure migration and sealing failure under high-pressure drilling and thermal cycles.
  • Our API Spec 6A casing head and casing spool series feature versatile slip/threaded/welded connection options and multiple slip hanger configurations (WD, W, WE) for secure string suspension.
  • Designed for reliable annular pressure containment and multi-stage casing suspension in onshore/offshore oil, gas, mud, and water service operations.
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Main Advantage & Solution

  • Inter-string pressure leakage and flange sealing failure under high-pressure operations.
    Solution: Engineered in full compliance with API Spec 6A standards, rated for ultra-high working pressure up to 25,000 Psi and severe temperature environments (K,X -60℃to 180℃).
  • Inflexible casing suspension and installation complexity in varied casing schedules.
    Solution: Broad casing size adaptability (5” to 30”) paired with specialized slip casing hangers (WD/W/WE types) for weight-stimulated or manual bolt-energized sealing, simplifying site assembly and improving sealing integrity.

Application Scenarios

  • For Drilling Contractors: Secure structural foundation and multi-stage casing string suspension.
  • For Well Operations & Production: Delivers dual-stage annular sealing, allows BOP/tree stack integration, and supports stimulation operations including acidizing, fracturing, and water injection.

Technical Specifications

SpecificationDetails
Nominal SizesCasing Head Top: 9” to 30”; Casing Spool Top: 9” to 26-3/4”; Casing Spool Bottom: 11” to 30”
Working Pressure2000 Psi, 3000 Psi, 5000 Psi, 10000 Psi, 15000 Psi, 20000 Psi, 25000 Psi
Matched Casing Sizes5”, 5-1/2”, 6-5/8”, 7”, 7-5/8”, 8-5/8”, 9-5/8”, 10-3/4”, 11-3/4”, 13-3/8”, 16”, 18-5/8”, 20”, 24”, 30”
Outlets2″ – 4″ LP or Studded Flange Outlets.
Top: Flanged; Bottom: Threaded, Slip-type, Welded
Material/Temp ClassAA – EE / L – U
PSL/PR LevelPSL 1-4 / PR 1-2
Applicable ServiceOil, Natural Gas, Mud, Water

Our Advantages

Factory Strength

As a premium API 6A, 16A, and 16C certified manufacturing powerhouse, our facilities are equipped with heavy CNC machining clusters and automated anti-corrosion alloy cladding systems, fully backed by an in-house CNAS laboratory capable of up to 300MPa pressure tracking and internationally witnessed PR2 gas performance testing.

Customization Service

Customized wellhead and spool configurations based on wellbore profiles; tailored outlet combinations; selection of specialized slip hangers (WD/W/WE); custom CRA overlay (e.g., Inconel) for severe sour service (H₂S / CO₂).

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