Shut-In Procedure while Tripping with a Subsea BOP Stack

After we publish this article “Hard Shut-In Procedure while Drilling with a Subsea BOP Stack”, there are some people asking us about what about the shut-in procedure while tripping with a subsea stack. So today we will focus on this topic.

 shut-In-Procedure-while-Tripping-with-a-Subsea-BOP-Stack

For the shutting in procedure with subsea stack, there are 3 steps which are stab valve, space out, and shut in and the details for the procedure are below.

 1st step: stab valve

  • Stab the full opening safety valve into the string and then make it up to the drillstring. Close the valve.

2nd step: space out

  • Space out to ensure that the tool joint will not be located across the BOP. Personnel need to pre calculate where to space out because the position on the rig floor will affect where the tool joint down hole.

3rd step: Shut-in the well

  • Shut the well in on the top most BOP as annular preventer first and then open the upper choke valve against a fully closed choke manifold valve.
  • Confirm well is properly shut in and double check line up.  Check the accumulator unit to ensure that there is no leakage after closure of the BOP.
  • Inform rig supervisors.
  • Prepare to strip back to the bottom.

Reference books: Well Control Books

Related Post

Understand shoe pressure – Top of Gas Kick B... I would like to address about the shoe pressure concept while while circulating gas influx out of wellbore. This is the fist scenario - Top of the gas...
Well Control and Blow Out !!! Many people ask us every time about well control but many of them understand that well control is when the rigs are burn. This is not the right concep...
What is Flow Check? I got question from my friend about What is flow check? How is it executed? This blog post will demonstrate you about flow check. Wha...
Well ballooning (wellbore breathing or micro fract... This topic describes about well ballooning. You may hear several terms besides well ballooning as wellbore breathing or micro fracturing phenomenon. ...
Share the joy
  • 144
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
    144
    Shares
Tagged , , , . Bookmark the permalink.

About DrillingFormulas.Com

Working in the oil field and loving to share knowledge.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.