OSHA Accident Investigation · Summary #14511810
TRIAD DRILLING & SUPPLY
BRENHAM, TX·
Event description
EMPLOYEE FELL FROM WELL SERVICING RIG
Investigation abstract
ON SEPTEMBER 9, 1986, A WELL SERVICE RIG CREW FROM THE TRIAD DRILLING AND SUPPLY CK OF HYDRAULIC PRESSURE, THE UPPER PART OF THE MAST DROPPED, SEVERING THE MAN'S LEG AND CAUSING HIM TO FALL APPROXIMATELY 50 FEET TO THE GROUND. HE RECEIVED A FATAL HEAD INJURY. COMPANY FINISHED SERVICING A WELL PUMP LOCATED 8 1/2 MILES SOUTH OF HIGHWAY 290 , OFF HIGHWAY 1291 NEAR WALLDECK, TEXAS. DOWN-RIGGING HAD BEGUN AND ALL GUYWIRES WERE DISCONNECTED. THE OPERATOR ATTEMPTED TO PULL THE DERRICK LOCKING PINS HYDR AULICALLY AND WAS SUCESSFUL WITH ONE OF THE TWO. THE OTHER PIN WOULD NOT BUDGE, PROBABLY DUE TO AN UNLEVELED RIG OR A LACK OF ADEQUATE HYDRAULIC PRESSURE, OR A COMBINATION OF THE TWO. A DERRICKMAN WAS SENT UP THE MAST TO DISLODGE THE PIN BY HAND, BUT WAS UNABLE TO DO SO. ANOTHER DERRICKMAN (EMPLOYEE #1) WAS SENT UP THE MAST WITH A HAMMER. HE WAS ABLE TO DISLODGE THE PIN. UNFORTUNATELY, DUE TO A LA
Victim
-
#1 Fatality Age 27 M
- Nature of injury
- 12
- Part of body
- 13
- Event type
- 5
- Source
- 43
- Occupation code
- 999
- Human factor
- 1
- Environmental factor
- 18
- Task assigned
- 2
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.