The results exhibit that once the stress stabilization time is 2 min, the coincidence degree on the indoor and subject drilling fluid lost control efficiency is the best as well as analysis result of the drilling fluid lost control effectiveness is “excellent. Height of fracture: width of fracture entrance https://medium.com/@vertechs/the-critical-role-of-fluid-rheology-in-modern-oilfield-operations-a-look-through-the-lens-of-202bf6aa8de3