Inspection Detail

Inspection: 107499824 - Oak Resources, Inc.

Inspection Information - Office: Oklahoma City Area Office

Inspection Nr: 107499824

Report ID: 0627700

Date Opened: 12/18/1990

Site Address:
Oak Resources, Inc.
3 1/4 Mi.N., 3/4 Mi. E.
Hennepin, OK 73046

Mailing Address:
4515 S. Yale, Suite C, Tulsa, OK 74135

Union Status: NonUnion

SIC:1311

NAICS: 0

Inspection Type: Accident

Scope: Partial

Advanced Notice: N

Ownership: Private

Safety/Health: Safety

Close Conference: 12/20/1990

Emphasis:

Case Closed: 04/01/1991

Violation Summary
Violations/Penalties	Serious	Willful	Repeat	Other	Unclass	Total
Initial Violations				1		1
Current Violations				1		1
Initial Penalty	$0	$0	$0	$0	$0	$0
Current Penalty	$0	$0	$0	$0	$0	$0
FTA Penalty	$0	$0	$0	$0	$0	$0

Violation Items
#	Citation ID	Citaton Type	Standard Cited	Issuance Date	Abatement Due Date	Current Penalty	Initial Penalty	FTA Penalty	Contest	Latest Event	Note
1.	01001	Other	19100151 B	02/22/1991	03/14/1991	$0	$0	$0		-

Investigation Summary

Investigation Nr: 772566

Event: 12/17/1990

EMPLOYEE OVEREXPOSED TO HYDROGEN SULFIDE

A PRODUCING OIL WELL NEEDED TO BE ACIDIFIED. THERE HAD BEEN NO PREVIOUS INDICATION OF HYDROGEN SULFIDE OR IRON SULFIDE IN THE WELL. APPROXIMATELY 10 BARRELS OF 7.5 PERCENT HYDROCHLORIC ACID SOLUTION WAS PUT INTO THE WELL. THE HYDROCHLORIC ACID APPARENTLY REACTED WITH THE IRON SULFIDE TO FORM HYDROGEN SULFIDE. A PRESSURE SLIGHTLY ABOVE ATMOSPHERIC WAS CREATED IN THE WELL AS THE ACID FELL TO THE BOTTOM. EMPLOYEE #1, THE TANK TRUCK DRIVER WHO HAD TRANSPORTED THE ACID TO THE LOCATION, WAS INSTRUCTED TO WAIT 30 MINUTES AND THEN PUT 10 BARRELS OF SALT WATER IN THE WELL. THIRTY MINUTES LATER, WHEN THE WELL HEAD CASING VALVE AND THE TANK TRUCK GATE VALVE WERE OPENED, HYDROGEN SULFIDE WAS RELEASED FROM THE WELL, THROUGH THE TANK TRUCK, AND OUT THE TANK TRUCK VENT. EMPLOYEE #1 WAS EXPOSED TO A FATAL CONCENTRATION OF HYDROGEN SULFIDE.

Keywords: TANK TRUCK, PPE, WORK RULES, WELL, INHALATION, TOXIC FUMES, OVEREXPOSURE, HYDROCHLORIC ACID, HYDROGEN SULFIDE, OIL WELL SERVICING

Investigated Inspection
#	Inspection	Age	Sex	Degree of Injury	Nature of Injury	Occupation
1	107499824					Occupation Not Listed

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