Methods for drilling a drill hole in an underground formation using a drill bit, and the removal of resu00ecduos drilling a borehole of a well

摘要

"Methods to drill a drill hole in an underground formation using a drill bit, and the removal of resu00ecduos of drilling of a well bore.It is disclosed a method for drilling of a drill hole using a drilling fluid that provides the advantages of ease of pumping a fluid of low viscosity with capacityAde of the suspension of waste drilling fluid is highly viscous.The viscosity of the fluid is also easily and quickly adjustable, so that the rheology of the fluid can be adapted during drilling, underground as conditions change.These advantages are obtained including the fluid a polymer reversibly reticulu00e1vel and a crosslinking activator encapsulated.The activator of cross-linking causes crosslinking after the fluid is located in the drill hole.The crosslinking is reversed on the surface of the shaft to reduce the viscosity of the fluid allowing the waste drilling are easily removed.The activator of reticulation is added back to the fluid and the fluid is returned to the boring hole.The amount of activator of crosslinking and / or polymer reticulu00e1vel can be adjusted in the fluid to change the rheology of the fluid to the adaptation of the fluid to changes in conditions of drill hole.Monitored in real time.