Search Results for: shut in procedure

Well Control Procedure for Non-Shearable String

There are many cases when non-shearable string is across the BOP therefore blind shear rams will not be able to shear the string to secure the well if needed. The special procedure must be in place to deal with this situation. This is an example of well control procedure for non-shearable string. If you want to use it for your rig, it must be modified to match with your rig operation.

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Hole Monitoring Procedures While Drilling or Milling Operation

This is the example of hole monitoring procedure while drilling or milling and this will give you some ideas only. You need to adjust it to suit with your operation


  • Perform pre-job safety meeting with personnel involved in operation.
  • The Driller or the toolpusher on the break is responsible for monitoring a well condition and identifying when a well must be shut-in with safe and correct practices.
  • If the driller sees a hole problem, the drilling operation must be stopped and inform the following people: Toolpusher, Senior Toolpusher and Company Representative.
  • Shut In Procedure While Drilling or Milling for Well Control Situation must be posted in the driller cabin where the driller can see it easily at all time.
    • Note: shut in procedure depends on requirement on each company.

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Importance of Choke Drill and Its Procedure

Choke drill is one of well control drills that will improve crew competency in driller’s method. The advantages from the choke drill are as follows:

• Get more familiar to practice controlling the pressure via a choke on the rig

• Get more understanding about lag time

• Practice the procedure to obtain the shut-in drill pipe pressure

• Ensure the surface well control equipment as pressure gauges, choke, BOP is ready for work

• Get more practices when attempting to bring the pump up to kill speed, slow the pump down and change the pump rate

Choke Drill Steps are listed below:

1. Trip in hole above top of cement

2. Fill the pipe and circulate seawater or mud around for few minutes

3. Close annular preventer or upper rams preventer

4. Pressure up annulus to 200 psi (the pressure may be different depending on the company policy.)

5. Line up the pump

6. Pump slowly to bump the float and obtain shut in drill pipe pressure

7. Bring the pump to kill rate by holding casing pressure constant – personnel need to adjust the choke

8. Measure lag time for the drill pipe gage after the adjustment of choke is made.

9. Change circulation rate by holding casing pressure constant. Crew needs to adjust choke to achieve this.

10. Shut the pump down by holding casing pressure constant.

11. Bleed off pressure and line up for drilling operation

Reference book: Well Control Books