Bullheading is one of the well control methods that involve pumping formation fluids back into formation into a shut-in well. You can read the basic details about bullheading from this link https://www.drillingformulas.com/bullheading-well-control-method/. For this time, this article will be focused on a calculation example for bullheading operation.
Bullheading is one of the well control methods which may be utilized in some occasions in order to control the well. Concept of bullheading is to pump kicks back into formations by using kill weight fluid. People usually use this method when normal circulation is impossible and volumetric method is not feasible to perform.
When May You Consider Using the Bullheading Well Control Method?
- When the kick size is very big so you may not be able to control the excessive volume coming to the surface.
- When you need to reduce surface pressure in order to start further well control operations.
- When there is a possibility to exceed surface pressure and volume gas on the surface if the conventional methods (drillers’ method, wait and weight and volumetric) are performed.
- When there is no pipe in the hole while taking influx.
- The influx contains high level of H2S which can cause safety of personnel on the rig.
- When there is no feasible way to strip back to the bottom in order to kill in the flux below.