Potassium formate drilling fluid density can meet the need of balancing formation pressure

In drilling engineering, drilling fluid density and mud specific gravity are two equivalent terms. Potassium formate drilling fluid can ensure a very important substance for safe and rapid drilling and protection of oil and gas layers in drilling engineering construction. Let me talk about what the potassium formate drilling fluid does. The popular saying is that when drilling, the drilling pump is pumped into the well from the drill string through the drill bit, and then the fluid that returns to the surface through the annulus. Therefore, the density of potassium formate drilling fluid can meet the need of balancing formation pressure.

The specific functions are:

1. Carry the drilled cuttings to the ground.

2. Cooling drill

3. Maintain the well wall 

4. Establish a pressure balance downhole to prevent formation fluids (oil, gas and water) from entering the well uncontrollably (because formation fluids are under pressure, blowouts occur if the control is not good). The drilling fluid density is mainly used to control the latter two.

The effect of potassium formate drilling fluid density on the hydrostatic column pressure. Simply put, the pressure of a hydrostatic column with high density is naturally high, and the pressure on the well wall and bottom is naturally high. A glass of water with a density of 1.0, and a glass of solution/colloid with a density of 1.2, of course, the weight is different. Increase the density, increase the input of high-quality clay, and gradually increase the density of the drilling fluid; reduce the density of the drilling fluid, inject clear water into the borehole, increase the mud discharge, and thereby dilute the drilling fluid.

Normally, the designed density of potassium formate drilling fluid can meet the need of balancing formation pressure, and safety factors including suction pressure have been taken into account. Don't blindly increase the density in order to prevent blowouts and collapse of the wall. This is also not a good thing for the well crew and mud crews, which affects the drilling speed of the machine and the formation pressure.

Drilling fluid is the circulating flushing medium used in the hole during drilling. The performance requirements of the drilling fluid are to meet the design. Now that everyone is speeding up and reducing costs, potassium formate solid-free drilling fluid is more popular.