12.4.32 WellKillingProcedureType

Topic Version1Published11/11/2016
For StandardWITSML v2.0

Specifies the type of procedure used to stop (kill) the flow of formation fluids into a well. A well-killing procedure may be planned or unplanned. The particular situation determines what type of procedure is used.

Table 12.4.32-1 Attributes




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.



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.



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.

Table 12.4.32-2 Associations



From: WellKillingProcedureType.

To: TypeEnum



From: DrillReportControlIncidentInfo.

To: WellKillingProcedureType