After you complete shut in procedure while tripping, there is following information that must be recorded before making any decision on how to kill the well.
Shut-In Casing Pressure (SICP): Read and record the shut-in casing pressure (casing gauge).
In order to get the proper pressure reading, the casing gauge should be installed upstream of the closed choke.
Tripping out of the hole is a critical operation, which drilling team must keep close eye on well control situation that can occur anytime. Wellbore monitoring and hole filling equipment and must be working properly so that the kick can be quickly detected. You must be aware of and prepared for the well control situation every tripping operation.
While tripping, it can cause swabbing effect that may allow formation fluid entering into wellbore. The well may not start to flow since the swabbing effect is just started. The swabbing effect will result in reducing the overall hydrostatic pressure. If the well is continually swabbed-in until the hydrostatic pressure in the wellbore less than formation pressure, the well will start flowing. Any time that you see short fill while tripping out, you need to go back to bottom and circulate bottom up to confirm wellbore condition.
When the well control situation is happened during tripping operation, the drilling crew must shut the well in right away using the following “3 S” shut-in procedures.
Stab Valve: Install Full-Open Safety Valve (FOSV) that must be in an open position in drill string. Make up to drilling string and close the safety valve.
Space Out: Space out to ensure that tool joint must no locate in BOP element.
Shut-in well: Close the annular preventer or uppermost pipe rams. Open the upper choke line valve against a fully closed manifold valve at a choke manifold. Line up to trip tank to confirm that the well is shut-in and flow has been stopped.
References
Cormack, D. (2007). An introduction to well control calculations for drilling operations. 1st ed. Texas: Springer.
Crumpton, H. (2010). Well Control for Completions and Interventions. 1st ed. Texas: Gulf Publishing.
Grace, R. (2003). Blowout and well control handbook [recurso electrónico]. 1st ed. Paises Bajos: Gulf Professional Pub.
Grace, R. and Cudd, B. (1994). Advanced blowout & well control. 1st ed. Houston: Gulf Publishing Company.
Watson, D., Brittenham, T. and Moore, P. (2003). Advanced well control. 1st ed. Richardson, Tex.: Society of Petroleum Engineers.
There are several figures that must be recorded after the well has been properly shut in in case of a well control situation.
Shut-In Casing Pressure (SICP): Read and record the shut-in casing pressure (casing gauge).
In order to get the proper pressure reading, the casing gauge should be installed upstream of the closed choke.
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Amount of cuttings produced per foot of hole drilled
Annular Pressure Loss
Annular-Capacity
Annular-velocity
Bulk Density Calculation
Buoyancy Factor Oilfield
Convert Pressure to Equivalent Mud Weight
Convert-Specific-Gravity
Cost Per Foot Calculation
Critical RPM
D Exponent Calculation
D Exponent Corrected Calculation
Decrease Oil Water Ratio
Density of Oil Water Mixture
Depth of Washout
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While drilling, a drilling team must be carefully check for well control indicators and if the positive kick indicator(s) indicated, crew must instantly know how to shut in the well in correct manner. The steps below, called “3S” shut-in procedures, demonstrate how to properly shut the well in while drilling.
