Relief Well Operations & Planning In Oil & Gas
https://youtu.be/PXXCWSKCgEE
From Drilling Manual Channel

A relief well is a directionally drilled (Directional Drilling) offset wellbore whose purpose is to intersect a well that has well control blowing out, thus enabling the control of the blowout.

Relief Well Plan

The relief well plan shall contain, as a minimum:

- The killing requirements limit rate and killing rate simulation study describes the primary kill method, including the number of relief wells required.
https://www.drillingmanual.com/relief-well/