pdc bit is a kind of drilling equipment often used in cold nights of oil drilling, many many potential customers in the selection of it, more or less damaged, so what are the causes of PDC bit damage?
1. Rocks are common in geological structures: if rocks are common, they will be more or less damaged in the case of drilling.
2. The main hydraulic parameters are not suitable: when selecting pdc bit, if the specific water power is too large, the bit body will suffer serious abrasion. If the specific position of the sprinkler is not suitable, the injection fluid will reflect and directly abrasion the cutter after impacting the bottom hole. If the specific water power selection is too small, relative to the composite sheet clean cooling is particularly unfavorable, especially in the soft geological structure is easy to cause the bit mud bag. In hard geological structure, the thermal accelerated wear of composite sheet is easy to be caused.
3. There are many hard partitions in geological structure: During the whole process of drilling pdc bits from soft geological structure to hard partition, the PDC bit crown wheel channel structure features and morphology cause the cutters in the same position of the bit to touch, and the hardness standards of the geological structure are different. As a result, the cutting teeth in different positions of the bit bear uneven loads when cutting the geological structure, resulting in bit bit, skip and other specific situations. Most of the load on the bit is concentrated on the cutters cutting hard interlayers. The instantaneous load clipping caused by bit bit and bit skip will result in the rupture of the cutters due to their high bearing capacity. In particular, when cutting hard points in hard geological structures, the instantaneous load is sufficient to effectively fracture the cutters.
