drilling mud

Drilling mud is acycle of fluid in the drilling process has a very important role. The earliest human use of the cycle when rotary drilling fluid is water, drilling mud due to formation of the components continue to become dispersed in the water turbidity of muddy water, when it called the "mud." Later, with the practice and development drilling, drilling mud can be used in oil and gas, to form different types of drilling fluid, called drilling fluid Guer. Drilling mud is a very important part of the merits and demerits of the drilling fluid performance speed, drilling safety and well put into operation the level of production has a crucial role. If the loss of drilling fluid during the cycle, can not carry out drilling work, so people often use "is the drilling mud blood" to liken the importance of drilling fluid in drilling position. There are six functional fluid. Carry and debris suspended in the wellbore. Drilling fluid is a colloidal fluid, when the drilling fluid circulation can drill cuttings out of the ground broken, the drilling under the pump can not work or play in the process of drilling, drilling fluid may also be debris suspended in the well bore and make it not sink to the bottom. Downhole formation pressure equilibrium. Strata Oil, gas and water pressure level is different, and therefore requires a certain density of drilling fluid, formation fluid pressure balanced to prevent blowout. Cooling, lubricating drill bits and drilling tools. Drill and drill work in the underground and ground friction heat, the process of drilling fluid in a circle can be absorbed and taken away by the heat, fluid flow from the wells back to the ground, it can emit their own heat absorption in the drilling fluid, Meanwhile, the drilling fluid on the drill bit and drill also has a lubricating effect. Protection wall. As the underground rock formation in pores, cracks under pressure drilling fluid to the formation of free water within the penetration of fluid particles adhere to the solid phase to form a thin wall cake tough, can not protect the wall collapse does not collapse. Reservoir protection. Drilling process can reduce the use of high-quality drilling and downhole drilling fluid pressure differential pressure producing layer, formed in the shaft of the wall quality of the cake, to prevent the drilling fluid into the formation water and fine particles, these methods and measures can effectively protect the reservoir. Improve drilling speed. In the jet drilling process, drilling fluid pressure jet can help break rocks, and clear the bottom cushion office bit broken formation, greatly accelerate the speed of the drilling bit. With oil and gas exploration and development work in progress and develop, increasing the depth of drilling, formation is also more complex, more and more diverse type drilling wells, therefore, proposed the drilling of new higher requirements, so development of drilling fluid technology more and more attention.