Drilling fluid is a circulating fluid that meets the needs of drilling operations

Drilling fluid is a circulating fluid that meets the needs of drilling operations has multiple functions during the drilling process. Drilling fluid is the blood of drilling fluid, also known as drilling fluid cleaning fluid. According to the composition of drilling fluid, drilling fluid can be divided into clean water, mud, clay free phase washing fluid, emulsion, foam compressed air. Clear water is an early drilling fluid that has been treated is easy to use. It is suitable for intact rock formations areas with sufficient water sources. Mud is a widely used drilling fluid, mainly suitable for unstable pore walls such as loose, fractured, prone to collapse, water expansion peeling.

Drilling mud additiveshave the following characteristics:

Clean the bottom of the well carry rock debris. Keep the bottom of the well clean, avoid repeated cutting, reduce wear, improve efficiency.

Cooling lubrication of drill bits drill strings. Reduce the temperature of the drill bit, reduce drilling tool wear, improve the service life of the drilling tool.

Prevent pollution wellbore collapse of oil gas reservoirs.

Balance (control) formation pressure, prevent blowout leakage, prevent contamination of drilling fluid by formation fluids.

Suspended rock debris weighing agent. Reduce the settling speed of rock debris avoid sand settling.

Sand rock debris can settle on the ground.

Effective transmission of hydraulic power. Transmit the power required for downhole power drilling tools the hydraulic power of the drill bit.

The weight of the drill pipe casing. The buoyancy effect of drilling fluid on drilling tools casing can reduce the load on the lifting system during the tripping process.

Provide a large amount of stratigraphic data, use drilling fluid, electrical logging, rock cuttings logging, other methods to obtain downhole data.

The hydraulic fracturing of rocks. The high-speed jet formed by the drilling fluid through the nozzle can directly break assist in breaking rocks.