Flowserve Double Shoulder Drill Stem
The Double Shoulder Drill Stem is engineered for delayed coking applications, featuring advanced connection geometry with a positive torque stop and optimized thread profile to address the limitations of conventional threaded stems. The design improves fatigue performance and resistance to high cyclic loading in severe service.
... Read more Read less Better Fatigue Resistance
10% stiffer pipe
Torque Capacity
4X tension across all threads
Thread Engagement Integrity
3X thread engagement
- 10% Stiffer Pipe for improved rigidity, directional control, and fatigue resistance
- 4X Make‑Up Torque Capacity with maintained tension across the entire threaded section
- 3X Thread Engagement for enhanced connection integrity
- Increased corrosion allowance with the cross-section area thickness enlarged, the assembly supports extended period before the wear and corrosion can compromise the joint
- Better resistance to regular pressure cycles
Standards
API 5DP
Materials
Carbon steel
Operating Parameters
Addresses application requirements for licensors and installed delayed coking units
Flow through drill stem exceeds 350 m3/hr (1540 GPM)
Design Pressure 345 bar (5000 PSI) or exceeding by demand
Size Range
All available and future lengths required by the market
Documents & Support
