Auxiliary Lines For Drilling Risers
Auxiliary lines are an integral part of offshore drilling riser joints and need to combine fatigue resistance, high strength and weldability. Choke and kill lines are pressure lines giving access to the well bore including when BOP is closed. Fluid can be pumped into the kill line and gas can be flowed out of the choke line. Mud boost lines are used as conduits for drilling fluid which is pumped into the riser just above the BOP stack to increase annular circulating velocities. In all cases, safety is paramount.
Performance
- Excellent geometry (ovality & eccentricity)
- Consistent mechanical properties
- Excellent pipe strength
- Good weldability
Applications
We offer high-strength low-alloy steel seamless pipe for choke & kill lines and boost lines with consistent mechanical properties and tight dimensional tolerances to ensure safe drilling operations. Our auxiliary lines can meet the most challenging environments including 20,000 psi BOP for deep offshore and HPHT applications.
- Yield strength: 75-85 ksi
- Grade: 4130
Weldability: CE < 0.75 - Comprehensive range: OD: 2 ₁⁄₂” to 7 ₁⁄₂” – WT: 0.5” to 1.5”
- Tailor-made dimensions for specific requirements
- Fixed length
- Tolerances: down to +/- 6%
