Well Control: Hard Shut in Procedure

The audience is kindly addressed to read about the soft shut in procedure on this link: Soft Shut in Procedure

Circuit alignment during operations

During operations the circuit has to be aligned as follows:

- Manuel valve on choke line is opened

- Hydraulic valve on choke line has to be closed

- The choke on choke manifold has to be closed

- All the valves leading to the separator passing by the choke (downstream valves) have to be in open positions.

- Beside these valves, all the valves have to be in closed position. 

Fig 01- Circuit Alignment in Hard Shut in Procedure

Hard shut in procedure while drilling

- if there is any kick indication, stop rotary, pick up off bottom and space out ( Tool joint one meter above rotary table to avoid getting the next tool joint on the pipe rams)

- Stop pumps, perform flow check. If the well is flowing then:

- Close annular or pipe rams

- Open choke line HCR valve

- Start plotting the trend of pressures, drill pipe pressure and casing pressure, note also the gain.

Hard shut in procedure while tripping

If any kick indication is noticed, the tripping has to be ceased immediately and the next steps have to be performed. Two situations ca be faced:

a) The well is flowing:

- Set the drilling string on the slips

- Install the fully opening safety valve in opened position 

- Close the safety valve

- Close the annular BOP

- Open the HCR valve on the choke line

- Record the pressures with the time and the gain volume

b) If the well is not flowing

- Set the drilling string on the slips

- Install the IBOP ( grey valve or the non-return valve)

- Trip back in the hole with controlling the volumes, if any anomalies are detected shut the well in following the hard procedure then continue the running in the hole with stripping. Once on bottom, circulate a bottom up volume and evaluate the situation.

The audience is kindly addressed to read about the soft shut in procedure on this link: Soft Shut in Procedure

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