Should an influx be detected while on bottom, the following procedure shall used:
1. RECOGNISE the kick and ALERT the crew.
2. STOP rotary table.
3. PULL BACK kelly until kelly cock is above rotary table.
4. STOP pump.
5. CLOSE ram type preventer.
6. Inform Toolpusher and Company Man.
7. OPEN hydraulic operated valve in line to choke manifold
8. MONITOR drillpipe and annulus pressure and ALLOW pressures to stabilise.
Note : If non return valves or floats are used then the drillpipe pressure should be determined by pumping very slowly to open the valve.
The closed-in drillpipe pressure is always a reliable measure of the bottom hole pressure. If both drillpipe pressure and closed-in annular pressure rise simultaneously before starting the actual well control job, gas migration is indicated and bleeding off is necessary until the shut in standpipe pressure, and thus the bottom hole pressure, has been restored. Again, when an NRV is installed care has to be taken to determine this pressure rise accurately.
9. MEASURE the increase in pit level.
10. Using the well control worksheet, CALCULATE the mud weight required to kill the well with a safety factor or overbalance. The recommended safety factor and overbalance should be 100 psi.
11. WEIGHT UP the mud to the value determined above.
12. KILL the well using the “wait and weight method” or “drillers method”.