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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Deepwater Horizon Investigation Reports

Deepwater Horizon is one of the worst well control incidents in oil and gas industry and this situation results in losing of life and damaging environment. Therefore, it is worth to learn from this accident. In this article, we would like to share a couple of investigation reports from reliable sources for you to read and learn from this incident.

Deepwater Horizon Accident Investigation Report

Figure 1 Deepwater Horizon Accident Investigation Report from BP

Figure 1 – Deepwater Horizon Accident Investigation Report from BP

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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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