Circulate Out The Influx Holding Drill Pipe Pressure Constant

After the pumps are brought up to desired kill rate and drill pipe pressure stabilize, personnel must observe and record the drillpipe pressure. For the first circulation, you must hold drill pipe pressure constant in order to maintain constant bottom hole pressure. To achieve maintain drill pipe pressure constant, personnel must manipulate the choke while circulating.


When gas in drilling fluid is circulated to the surface, the gas will naturally begin to expand because of decrease in pressure. The expansion of gas in mud will result in increasing both pit volume and casing pressure. This time is the most critical period of the well control operation. If personnel panic about it, the operation could be turned out from a good operation to a disaster.

Sometimes, you may have difficulty to bleed the gas off fast enough to keep the drill pipe pressure within required limits. As you know, excessive drill pipe pressure can result in formation breakdown. If you cannot release gas fast enough from the annulus to prevent an increase in drill pipe pressure, you must show down pump rate to compensate the pressure.

Ref book: Drilling Formula Book Formulas and Calculations for Drilling, Production and Workover, Second Edition

Well Control Books

Related Post

Driller’s Method in Well Control Driller’s method is one of several methods to kill the well. The main idea of driller method is to kill the well with constant bottom hole pressure. T...
Float Bumping Procedures To Get Shut In Drill Pipe... Float Bumping Procedures To Get Shut In Drill Pipe Pressure VDO If you cannot see, please follow http://www.youtube.com/watch?v=KYXnyInpXkU ...
What is Secondary Well Control? Referring to the previous section, primary well control is hydrostatic pressure bore that prevents reservoir influx while performing drilling operatio...
Hole Monitoring Procedures While Drilling or Milli... 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 ...
Share the joy
  • 4
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
    4
    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Your email address will not be published.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.