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Oilfield worker struck by drilling block in Wyoming.

Wyoming Department of Health
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, FACE 92WY014, 1993 Jan; :1-5
A 39 year old male chain hand died when he was struck by a travelling block that had fallen from a height of 40', striking him in the pelvic area. A co-worker operating the draw works heard a "pop", and engaged both the hand brake and the electrical brake in an attempt to keep the block from falling. He yelled to the crew to clear the area. Two co-workers successfully moved out of danger behind 90' stands that were to the right of the downhole. The victim, while trying to get away by running toward the doghouse (drillers' office), was struck and crushed beneath the 12,000 pound block and hook assembly. The rig site is located over 35 miles from the nearest sheriff or ambulance service, and is accessible through a combination of Interstate, Primary, County, ranch, and oilfield roads. Medically trained oil rig personnel responded from a rig site within four miles of the incident, and ambulance personnel arrived 45 minutes after the incident had occurred. Employers may be able to minimize the potential for occurrence of this type of incident through the following precautions: 1. Assure that the crown block/traveling block arrangement is secured against failure and that braking systems and cables are secure and in good working condition. 2. Provide for ample checks of equipment and systems. 3. Provide adequate training for personnel in high-risk areas.
Region-8; Accident-analysis; Accident-prevention; Accidents; Injuries; Injury-prevention; Traumatic-injuries; Work-operations; Work-analysis; Work-areas; Work-performance; Work-practices; Safety-education; Safety-equipment; Safety-measures; Safety-monitoring; Oil-industry; Training
Publication Date
Document Type
Field Studies; Fatality Assessment and Control Evaluation
Funding Type
Cooperative Agreement
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
FACE-92WY014; Cooperative-Agreement-Number-U60-CCU-807083
SIC Code
Source Name
National Institute for Occupational Safety and Health
Performing Organization
Wyoming Department of Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division