Pressure Profile of Drillpipe and Casing Pressure while killing a well with wait and weight method

This topic will cover about pressure profile both drill pipe and casing pressure while kill a well with wait and weight method.

 

Drill Pipe Pressure

Firstly, we will take a look at the drillpipe pressure. When kill weight mud is displaced in the well, drill pipe pressure drops as per the drill pipe schedule. Once kill weight mud is to the bit, drill pipe pressure is maintained until the well is killed. A pressure profile will look like the following chart.

Casing Pressure

Secondly, we will take a look at the casing pressure. The casing pressure will increase because gas expansion while it is being circulated. The maximum casing pressure occurs when gas reaches at surface. Then casing pressure will drop rapidly because gas is coming out on surface. Once gas is totally removed from the surface, there is still some casing pressure due to original mud weight. The casing pressure will gradually decrease and drop to 0 psi which means the well is killed with the kill weight mud. A pressure profile demonstrates how casing pressure acts while circulating.

 

 

I wish these two charts would help you understand about wait and weight method.

Reference books: Well Control Books

Related Post

Choke Line Friction – How Does It Affect Deepwater... Choke line friction (CLF) is the frictional pressure which is generated while circulating mud through choke or kill line. For surface stack, the choke...
Underbalanced Drilling – Watch This VDO To G... Underbalanced drilling is a drilling technique that hydrostatic pressure from drilling mud is less than reservoir pressure. The underbalanced drilling...
Suction Anchor Calculation Suction anchor or suction caisson is an offshore foundation which is quite popular for offshore installation. It utilizes a negative pressure concept ...
Maximum influx height to equal the maximum allowab... You know how the maximum allowable shut in casing pressure (MASICP) from the leak off test data and your current mud weight in the well. Moreover, you...
Share the joy
  • 1
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
    1
    Share
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Your email address will not be published.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.