▎ 摘　　要

NOVELTY - Anti-collapse drilling fluid comprises 1000 pts. wt. water, 15-40 pts. wt. bentonite for drilling fluid, preferably 15-30 pts. wt., 5-35 pts. wt. micro-nano plugging agent, preferably 10-20 pts. wt., 20-70 pts. wt. temperature-sensitive blocking and anti-collapse agent, preferably 30-50 pts. wt., 15-30 pts. wt. graphene hydrogel, preferably 20-30 pts. wt., 0-1600 pts. wt. inert weighting agent. USE - The anti-collapse drilling fluid is useful in drilling fractured carbonate formations (claimed). ADVANTAGE - The collapse-proof drilling fluid has better anti-collapse performance, rheological performance, temperature resistance and lubricating performance, which can effectively reduce the well wall instability risk of the carbonate rock stratum, reduces the drilling and blocking, ensures the safety construction. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for drilling fluid prepared by the method