Filter cake and drilling mud

Filter cake is formed by a layer of solid particles in the drilling mud against the porous because of the pressure differential between the hydrostatic pressure and formation pressure and is still occurring during the drilling of wells.

For our drilling operation, we would like the filter cake which is waterproof and thin .Practically, the filter cake must be less than or equal to 1 / 16 inch. If you have bad drilling fluid, which results in a thick filter cake into the well, you may be facing a situation of stuck pipe and high torque and drag.

What will the impact on the operation of the filter cake drilling?

differential sticking - If you have the thick filter cake, a contact area between the drill string or other type of tube will be increased. When drilling into permeable zones that are seriously overbalance, your chain of drilling are likely to get stuck in a differential manner.Furthermore, not only the drill string become stuck, the logging tool may be trapped in different areas through permeable.

Torque and drag - Under dynamic conditions such as drilling, pipe work, etc. If your land is not in good shape, and it causes the filter cake through the thick wall of the wellbore, you can see increase the torque. See more detail on a topic slide, with a thick wall filter cake, you will face the significant drag during the maneuver or hole logging.