OSHA Accident Investigation · Summary #14455380
DRILL PIPE,OIL WELL DRILLING,STRUCK BY,FALLING OBJECT,OIL RIG
Event description
STRUCK BY FALLING DRILL EQUIPMENT; KNOCKED INTO AIR HOIST
Investigation abstract
EMPLOYEE#1 WAS STANDING BETWEEN THE MOUSE HOLE AND AN AIR HOIST. AN EASTMAN CIRC PARATED FROM THE DRILL PIPE. THE WEIGHT OF THE CIRCULATING HEAD (APPROXIMATELY 2 00 TO 300 POUNDS), ALONG WITH THE GREATER PORTION OF THE MUD-LOADED ROTARY HOSE WAS SUDDENLY THROWN ONTO THE SAFETY CHAIN (WHICH CONNECTED THE HOSE TO THE BAIL) . THE CHAIN FAILED TO SUPPORT THE ENTIRE LOAD, ALLOWING THE CIRCULATING HEAD ON THE END OF THE ROTARY HEAD TO FALL TO THE DRILL FLOOR. AS THE HEAD & HOSE, STILL CONNECTED TO THE STANDPIPE, FELL, IT STRUCK EMPLOYEE #1 ON THE SIDE, THROWING H IM AGAINST AN AIR HOIST. EMPLOYEE #1'S INJURY WAS CAUSED BY HIS COLLISION WITH T HE AIR HOIST. ULATING HEAD HAD BEEN ATTACHED TO A SECTION OF DRILL PIPE AND THE ROTARY HOSE HA D BEEN MADE UP ON THE CIRCULATING HEAD. ACCORDING TO MANAGEMENT, A SAFETY CHAIN HAD BEEN INSTALLED CONNECTING THE ROTARY HOSE TO THE BAIL AND THE ASSEMBLY HOIST ED. ANOTHER SECTION OF DRILL PIPE, RESTING IN THE MOUSEHOLE, WAS ATTACHED. THE T WO SECTIONS OF DRILL PIPE, ALONG WITH THE CIRCULATING HEAD AND THE ATTACHED ROTA RY HEAD, WAS HOISTED AND ATTACHED TO THE HANGING PIPE IN THE HOLE. THE COMPLETE STRING WAS THEN HOISTED SOME 10 FEET. AFTER PUMPING APPROXIMATELY 5 MINUTES, THE PRESSURE GAUGE SHOWED A SUDDEN SURGE TO 500 PSI. THE CIRCULATING HEAD BECAME SE
Victim
-
#1 Hospitalized Age 25 M
- Nature of injury
- 12
- Part of body
- 23
- Event type
- 6
- Source
- 26
- Occupation code
- 999
- Human factor
- 6
- Environmental factor
- 6
- Task assigned
- 1
Codes shown verbatim from OSHA's accident-investigation database. A human-readable decoder is coming in a future release once the accident_lookup2 dictionary is loaded.