History of mud cleaner and King cobra screen originates from the oil drilling fluids flow inside the compatibility drilling devices that might involve the mixture of drilling fluids and reservoir debris under temperatures as high as one hundred and twenty degrees. To be more specific, in the history of mud cleaner and King cobra screen, the rock debris recovery rate can be rather high even though the shape and size of the debris can be changed a little, which shows that the drilling fluid has a relatively good compatibility with the reservoir rocks. It is a truth universally acknowledged that, with the help of history of mud cleaner and King cobra screen, drilling and completion fluid mixed with a certain proportion of simulation or formation water can be found in many operations as well as experiments and the method is mainly used to evaluate the compatibility of drilling fluid and formation water.
It can be seen from the history of mud cleaner and Mongoose PT screen that chemical reaction in the drilling sediment will not be generated in a random manner and they have good compatibility ith the reservoir fluid in the system. Lubricity evaluation in the history of mud cleaner and King cobra screen needs three main parameters including the drilling fluid lubrication coefficient, the pressure strength and the mud friction coefficient. Therefore, according to scientific research results, the evaluation data and the results can be used to indicate the lubrication performance of system in a clear manner since it not only provides a powerful guarantee of the history of mud cleaner and King cobra screen but also decreases the friction torque of drilling tool by as high as thirty percent so that the drilling fluid can fully meet the needs as long as the strengthening solid phase control is properly performed. Under the history of mud cleaner and King cobra screen, a number of drilling and completion fluid systems have been applied to the deep well and some new and good performance of the systems can be found out that are marked with great oil drilling capability and stability. In the conditions of low viscosity drilling fluid, as a matter of fact, it can meet the drilling requirements of no solid phase and helps to deal with the problems in time so as to protect reservoir. Inspired by the history of mud cleaner and King cobra screen, the drilling fluid system without any doubt has removed the damage caused by the solid particles that might block the oil reservoir and at the same time, the compatibility between the oil fluid treating agents has been improved.