Shut in is the process of closing the well in a controlled manner,in case of positive kick signs are observed.shut in well can be carried out in two ways in case of self flow.They are:-
- Soft shut-in
- Hard shut – in
Shut in well can be done while drilling and also at the time of tripping, when a positive kick sign is found.shut in is carried until pressure of shut-in drill pipe pressure (siidpp),shut-in casing pressure(sicp) get stabilise.
Soft shut-in
During the time of drilling
- As the first step rotary table should be stop.
- Clear the tool joint by picking up kelly above rotary table.
- As the next step mud pump should be stopped.check if there is any self flow to the shale shaker,if there is self flow.close the well by following steps:-
- Open hcr (hydraulic control) valve or manual valve on chock line.
- As the next step close blow out preventer(mostly annular preventer)
- Monitor casing pressure ,by gradually closing adjustable choke valve
- Make pressure to stabilse and note sidpp,sicp record and pit gain
During the time of tripping
- As the first step tool joint should be lifted above rotary table and set drill pipe or bha on slips.
- Full opening safety valve (fosv) should install in open position and close the valve of fosv.after that close the well by following steps:-
- Open hcr (hydraulic control) valve or manual valve on chock line.
- As the next step close blow out preventer(mostly annular preventer)
- Adjustable choke should be closed gradually, and note down the casing pressure.
- Kelly should make up with pipe joint and fosv should be open.
- Make pressure to stabilse and note sidpp,sicp record and pit gain
Hard shut-in
During the time of drilling
- As the first step rotary table should be stop.
- Clear the tool joint by picking up kelly above rotary table.
- As the next step mud pump should be stopped.check if there is any self flow to the shale shaker,if there is self flow.close the well by following steps:-
- In this blow out preventer is closed first(mostly annular preventer)
- Open hcr (hydraulic control) valve or manual valve on chock line when the choke is in fully closed condition.
- Make pressure to satbilse and note sidpp,sicp record and pit gain
During the time of tripping
- As the first step tool joint should be lifted above rotary table and set drill pipe or bha on slips.
- Full opening safety valve (fosv) should install in open position and close the valve of fosv.after that close the well by following steps:-
- Open hcr (hydraulic control) valve or manual valve on chock line.
- As the next step close blow out preventer(mostly annular preventer)
- Adjustable choke should be closed gradually, and note down the casing pressure.
- Kelly should make up with pipe joint and fosv should be open.
- Make pressure to satbilse and note sidpp,sicp record and pit gain
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