Roles and Responsibilities
Contact Facility Integrity Group (FIG) and make them aware of the current situation.
Shift Lead
Known to cause a sudden release of the obstruction
High differential pressure
While conducting pressure survey you should always assume there is multiple what
Obstructions
When dealing with ice plugs who should be notified before putting line back into service
FIG
You can't handle the truth
A few good men
Initiate operational corrective actions to prevent serious injury or damage to pipelines and equipment. This corrective action, may include shutdown of equipment, pipelines.
Control room operator
This hazard is known to cause hearing loss and workers can be exposed to this while equalizing pressures across blockages
High noise levels
Where damage is most likely to occur if obstruction breaks free
control valves, closed valves or elbows
What is used to test for disintegration/melting of full blockages
Predefined medium (Nitrogen)
I'll be back
Terminator
Protect yourself first, never attempt to treat a hydrate formation or ice plug without thoroughly understanding every aspect of this operating procedure.
Unit Operator
Which explosive, toxic or hazardous gases and vapors may be present when dealing with hydrates/ice plugs
H2S/LEL/BENZENE
On what side of the obstruction should methanol be injected for a partial obstruction
Upstream
Full obstructions should have methanol injected on the upstream and downstream side.
Where are ice plugs most likely to be found
Low point of the line
"I'm not quite sure how to put this, but... I'm kind of a big deal"
Anchorman
Ensure the pipeline system is fully reinstated before being placed back into service. (chemical injection systems removed, insulation, cladding reinstated)
Unit Operator
These external pressure sources are other hazards associated with hydrate/ice plug handling
Baker Pump/Pressure Truck
When it is determined the partial obstruction is cleared you should
return piping to original service
When dealing with full blockage - gas hydrate we equalize pressure across the blockage by slowly depressurizing the high pressure side in 10% increments. When dealing with an ice plug what pressure is desired on both sides of the plug
Atmospheric
ensure there is no significant differential pressure as this will give energy to move plug. (No more than 10%)
"You're gonna need a bigger boat"
Jaws
Complete pipeline integrity evaluations and assessments on the affected pipeline system.
FIG
Equipment exposed to a temperature below the ______ _______ ______ _____ is at risk of a brittle fracture
minimum design metal temperature
When dealing with a gas hydrate-full blockage we inject methanol or Mikes De-icer. What is applied to an ice plug to break down the obstruction.
Heat
Heat should not be applied to a pipe section unless the melting liquids can be removed during the melting process ie. Open drain. Thermal expansion of liquids during heating results in dangerously high pressure that can fail the pipe material
I award you no points, and may god have mercy on your sould
Billy Madison