HIGH PRESSURE INSIDE A
HEATER-TREATER CAUSED THE DEATH OF AN OIL & GAS MAINTENANCE WORKER IN THE
GULF OF MEXICO ON NOVEMBER 21, 2014
Fieldwood Energy LLC
Press Release re West Delta 105 "E" Deadly Incident that Killed a
Worker and Injured 3--November 21, 2014; 10:00 a.m. central
At Fieldwood Energy, our top priority is the safety of our
employees and contractors. We regret that yesterday afternoon there was an incident
at our West Delta 105 "E" platform that occurred when employees of
Turnkey Cleaning Services were cleaning a heater treater, which is a piece of
equipment that separates oil from water and other liquids. Turnkey Cleaning
Services is a Louisiana based industrial cleaning service company that
specializes in the cleaning of offshore facilities, including the cleaning of
heater treaters.
During the cleaning process, one Turnkey employee was fatally
injured and a second suffered visible injuries. The Turnkey employee who
suffered visible injuries was immediately flown to West Jefferson Hospital for
evaluation and treatment. Two other individuals who were on the platform
complained of ringing in their ears, so they also were flown to the same
hospital to be evaluated. All three of these individuals have been evaluated
and released from the hospital. All other personnel on the platform have been
accounted for and are safe.
The West Delta 105 "E" platform has not been
producing oil or gas for over a week, as the facility was undergoing routine
maintenance operations when the incident occurred. There were no wells that
were producing at the time of the incident. The explosion that was mentioned in
the initial reports was not a well explosion or well blowout. Instead, it was
an isolated pressure event that occurred inside the heater treater and did not
result in a fire on the platform. This incident was not related to a drilling
operation but, instead, occurred during maintenance operations at the platform.
There was no oil spill or pollution that resulted from this incident and it was
contained immediately after it occurred with no damage to the environment, the
platform, or the platform�s
wells.
We do not have additional details at this point. We are working
hand in hand with BSEE, the Coast Guard, and Turnkey Cleaning Services to
investigate this incident fully. We will post additional information on our
company website as we learn more details. Our thoughts and prayers continue to
be with the family of the deceased Turnkey Cleaning Services employee.
What is a Heater
Treater?
A heater-treater is a device used to remove contaminants from
the natural gas at or near the well head before the gas is sent down the
production line to the gas plant. Generally, the contaminants include liquid
hydrocarbons and water. The composition of the liquid hydrocarbons (oil and
condensate) can vary by gas field but the majority of gas wells in Colorado are
located in the Denver-Julesburg (DJ) Basin which produces a condensate liquid.
The heater-treater is a combination of a heater, free-water
knockout, and oil/condensate and gas separator. It prevents the formation of
ice and natural gas hydrates that may form under the high pressures associated
with the gas well production process. These solids can plug the wellhead. Since
chokes in the wellhead restrict the flow of the oil and gas from the well,
temperatures may drop due to the pressure changes of the choke. This may cause
the water or hydrates to freeze and plug the well, thereby slowing or stopping
the condensate and gas production. Two diagrams at the end of this document
show examples of heater-treaters.
Heated Separation
Process
The operating conditions in the heater treater must be
adequately monitored to ensure operational productivity and safety. If increases or decreases in temperature or
pressure are reported, operators must take the appropriate steps to return the
vessel to an optimal operating range. At
this time, we do not know iof the correct procedures were followed, but since
one person was killed by a high pressure event and 3 were injured, most likely
the proper procedures were not followed or the employees were not properly
trained.
Without jumping the gun, we often see migrant workers getting
killed in these maintenance operations.
These are very dirty jobs under very tough conditions, dealing with
rusty and corroded and clogged equipment.
Only some poor migrant worker would do this type of work. A trained engineer would know that the first
thing you do with heaters-treaters is to check the temperature and
pressure. The pressure relief valves on
these equipment fail quite often and do not show the correct pressure inside
the vessel.
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