OSHA Accident Investigation · Summary #14467138
OIL WELL DRILLING,CAUGHT BETWEEN,CRUSHED,STRUCK BY,BOOM SUPPORT CABLE,COMMUNICATION,OIL RIG
Event description
Employee killed when crushed by suspended object
Investigation abstract
At approximately 1:30 a.m. on July 7, 1984, the crew on an oil and gas drilling ed out to lower the nipple to the ground. Apparently unknown to the rig crew, Em ployee #1 and his coworker returned to the blowout preventer to resume their wor k. As the nipple was being lowered, the boom line became temporarily hung up on the rig floor. The crew did not realize this and the cathead operator continued to play out the line, thinking the nipple he could not see was on the ground. Th e boom line came free as the wire line clamps slipped. With the slack in the boo m line, the bell nipple swung toward the blowout preventer stack, fatally crushi ng Employee #1 between them. well was nippling up a blowout preventer stack. On the surface casing, Employee #1, part of a two-man specialty service company, was torquing the blowout preven ter bolts. The bell nipple atop the blowout preventer stack had to removed and p laced on the ground. A winch hoist line through a rotary table was secured to th e top of bell nipple. A cathead actuated boom line was lowered below and outside the rig floor near, extended generally horizontally toward and then secured to the lower flange on the bell nipple off-stack. The boom line pulled the bell nip ple horizontally to the door side of the substructure. Both lines were then play
Victim
-
#1 Fatality Age 32 M
- Nature of injury
- 6
- Part of body
- 13
- Event type
- 2
- Source
- 24
- Occupation code
- 999
- Human factor
- 1
- 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.