Private Forums
20 June 2019
A simple question, 

During a workover would you ever under displace when bull heading to kill a well?
1 answer(s)
Workover Engineer
SPREAD Associates
Total Posts: 17
Join Date: 01/08/18
Hi Allan,

Bullheading has its reasons when applied to bring back the well under control and one of them is circulation is not possible to be achieved.
If kill fluid is under displace first, I cannot see where is the benefit. The goal is to have the well killed ASAP, safely and efficient. 
Maybe I am missing something from your question.
I never under displaced just make sure I am pumping at a sufficient rate to avoid gas migration to surface (Rate of gas migration = Change in SICP in 1 hour multiplied with Fluid gradient - ft/h, psi and psi/ft; Pumping pressure is not increasing)

Hope this helps you.

Posted by

Allan Hamer

Night Drilling Supervisor / M/LWD Engineer

SPREAD Associates

Total Posts: 2
Jump to top of the page