Chapter 7 Critical Sour Wells Flashcards
1
Q
Define a Critical Sour Well?
A
A designation that reflects the proposed well’s proximity to an urban centre and its maximum potential hydrogen sulphide (H2S) release rate during the drilling stage.
2
Q
At what concentration is H2S gas considered to be immediately dangerous to life and health or IDLH?
A
100ppm
3
Q
The use of Shear Blind Rams is at the operator’s distraction and/or AER’s request. What are some of the risks of not using Shear Rams?
A
Shear rams provide an ultimate well barrier to both the drill string and the annulus in the event of a catastrophic surface equipment failure or a drill string failure during the well kill operation.
