Safety Alert
Top Drive Incident
Top Drive Incident
- IADC
- Safety Alert
- IADC Alert 99-19
- Line of FireMachinery and Equipment
- Dropped objectsLoss of containmentMechanical failurePressure systems
- Drilling
- Hose
- Positive retention and reliable securing
- Upstream oil and gas
Summary
A drilling-rig alert describes a gooseneck and kelly hose detaching from a top drive with 5000 psi pump pressure. The retaining chain parted, allowing the assembly and hose to fall onto the rig floor. Oil-based mud sprayed the floor before pump shutdown; no injuries were reported.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Loss of containment; containment loss.
Classifications: Mechanical failure; equipment failure.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Drilling; well drilling.
Classifications: Hose; flexible hose.
Classifications: Positive retention and reliable securing.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Summary
Safety considerations associated with incidents involving a top drive.
IADC Alert 99-19. Themes: line of fire, machinery and equipment.