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Occupational Safety and Health Administration OSHA

Inspection Detail

Inspection: 310458716 - Unit Drilling Co

Inspection Information - Office: Utah

Nr: 310458716Report ID: 0854910Open Date: 12/31/2007

Unit Drilling Co
Unit Rig 109 Well #Tu3-35-7-21
Vernal, UT 84078
Union Status: NonUnion
SIC: 1381/Drilling Oil and Gas Wells
NAICS: 213111/Drilling Oil and Gas Wells
Mailing: 7130 S Lewis Ste 1000, Tulsa, OK 74136

Inspection Type:Accident
Scope:Partial Advanced Notice:N
Safety/Health:Safety Close Conference:01/24/2008
Planning Guide: Safety-Manufacturing Close Case:05/21/2009

Related Activity:TypeIDSafetyHealth

Violation Summary
Serious Willful Repeat Other Unclass Total
Initial Violations 1 1
Current Violations 1 1
Initial Penalty $3,500 $0 $0 $0 $0 $3,500
Current Penalty $0 $0 $0 $3,500 $0 $3,500
FTA Amount $0 $0 $0 $0 $0 $0

Violation Items
# ID Type Standard Issuance Abate Curr$ Init$ Fta$ Contest LastEvent
  1. 01001 Other 20020 K 01/29/2008 02/01/2008 $3,500 $3,500 $0 A - Amendment

Accident Investigation Summary
Summary Nr: 201562048Event: 12/29/2007Worker Is Killed By Air Pressure Explosion While Drilling
On December 29, 2007, three employees were holding a mud sleeve to capture and contain foam during an air-drilling operation with air pressure in a line of about 1,180 psi. The employees did not release the air pressure before they broke the line. The resulting release of air pressure, together with the air line's striking Employee #1 in the head, threw Employee #1 onto the cables of the drilling equipment draw works. The employee became entangled in the cables. He sustained a skull fracture from the line's hitting him and a major laceration on the inner side of his right leg caused by caused by the cable entanglement. Employee #1 was pronounced dead at the scene. Two other workers were thrown to the ground by the air explosion, but no injuries were reported to those workers.
Keywords: air pressure, fracture, drilling mud, compressed air, explosion, laceration, skull, entangled, pressure release, leg
Inspection Degree Nature Occupation
1 310458716 Fatality Other Drilling and boring machine operators

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