12.4.32 WellKillingProcedureType

drillers method

Prescribes circulating the kick fluids out of the well and then circulating a higher density kill mud into the well through a kill line with an adjustable choke.

wait and weight

Prescribes circulating heavier kill mud while a constant downhole pressure is maintained by pressure relief through a choke.

bullheading

Prescribes pumping kill-weight fluid down the tubing and forcing the wellbore fluids back into the formation through the perforations.

lubricate and bleed

Prescribes this process:

1) Pump a volume of killing fluid corresponding to half the volume of the well tubing into the well.

2) Observe the well for 30 to 60 minutes and wait for the tubing head pressure to drop.

3) Pump additional killing fluid into the well.

4) When the wellhead pressure drops below 200 psi above observed tubing head pressure, bleed off gas from the tubing at high rate.

forward circulation

Prescribes circulating drilling fluid down the tubing, through a circulation device (or out the end of a workstring/coiled tubing) and up the annulus.

reverse circulation

Prescribes circulating a drilling fluid down the completion annulus, workstring annulus, or pipe annulus and taking returns up the tubing, workstring, or pipe.

unknown

The value is not known. Avoid using this value. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations.

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Generalization

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Dependency