Inspection Detail

Inspection: 1398130 - The Western Company Of North America

Inspection Information - Office: Oklahoma City Area Office

Inspection Nr: 1398130

Report ID: 0627700

Date Opened: 09/12/1984

Site Address:
The Western Company Of North America
6 Miles Southeast Of
Chester, OK 73838

Mailing Address:
Po Box 1305 48th St & Western, Woodward, OK 73801

Union Status: NonUnion

SIC:1389

NAICS: 0

Inspection Type: Accident

Scope: Complete

Advanced Notice: N

Ownership: Private

Safety/Health: Safety

Close Conference: 09/13/1984

Emphasis: L:Oilgas

Case Closed: 10/10/1984

Related Activity
Type	Activity Nr	Safety	Health
Accident	360547707

Investigation Summary

Investigation Nr: 14241210

Event: 09/06/1984

EMPLOYEE STRUCK BY OIL WELL CHOKE VALVE

EMPLOYEE #1 WAS BLEEDING THE PRESSURE OFF THE WELLHEAD THROUGH A CHOKE VALVE WHICH WAS MOUNTED ON THE WELLHEAD CONTROL (TREE). THE CHOKE VALVE WAS OPENED JUST ENOUGH TO ALLOW PRESSURE TO ESCAPE AT THE UNION, WHICH WAS DISCONNECTED FROM THE SEPARATOR LINE. EMPLOYEE #1 INSTRUCTED ANOTHER WORKER TO RAISE THE WELLHEAD PROTECTOR OUT OF THE TREE. AS THE WELLHEAD PROTECTOR CUP WAS RAISED PAST THE CHOKE VALVE, THE CHOKE VALVE ASSEMBLY WAS PRESSURIZED BY PRESSURE FROM WITHIN THE TREE. THIS PRESSURE BUILDUP CAUSED THE CHOKE VALVE TO SPIN OFF THE MOUNTING NIPPLE. IT BLEW OUTWARD OFF THE TREE AND STRUCK EMPLOYEE #1 IN THE CHEST.

Keywords: CHEST, HIGH PRESSURE, VALVE, OIL WELL SERVICING, STRUCK BY, WELLHEAD, PRESSURE RELEASE

Investigated Inspection
#	Inspection	Age	Sex	Degree of Injury	Nature of Injury	Occupation
1	1398130			Fatality	Fracture	Occupation not reported

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