PDC bit, cone bit use precautions

According to the bit body material classification

1, carcass PDC drill bit

Carbide Diamond Composite (PDC) A drill bit is a type of cutting drill that welds a diamond composite sheet by brazing on the drill body. The carcass bit is sintered with tungsten carbide powder and brazed with tungsten carbide carcass on the polycrystalline diamond composite sheet with natural diamond.

2, steel type PDC drill bit

Steel body PDC bit, is nickel, chromium, molybdenum alloy machining forming. After the heat treatment in the drill body on the drilling, strong man-made polycrystalline diamond composite sheet into the (tight fit) drill body, with cylindrical tungsten carbide path.

According to applicable industry classification

1, Geological exploration with a composite drill bit is mainly used for geological exploration and exploration of composite chip bit, suitable for soft to medium hard rock, and now some manufacturers of new research and development of new composite film can be applied to ten hardness of the rock.

2, coal field drilling with composite chip bit is mainly used for coal mine drilling and excavation. Generally speaking, the rock formation is relatively soft, the composite bit is widely used, such as anchor bit, three-wing drill and so on.

3, oil exploration with a composite bit is mainly used in oil and gas drilling drill bit. At present, the oil field with a composite bit is all the composite drill bit inside the highest cost, the highest requirements. Can be said that the composite chip inside the arsenal bit.

Drill use precautions

  Do not hit the cone bit when replacing the drill bit.

  To keep the mud clean, to prevent blocking drill bit water, and affect the use of drill bit. C, drill down control speed, to prevent sudden resistance, so that the cone bit to play a better effect.

  Keep two pumps on the water well. E, keep the bottom of the net without falling objects, from the drill, drilling are equipped with scraper or steel plate to cover the wellhead, often check the jaw insurance pin and wellhead tools to prevent the wellhead fall.

  Pay attention to the drill, to prevent drilling, drilling.

  Encountered a bad drill, jump drilling time to adjust the drilling parameters.

  Cone bit drill in the end, the first cycle of about ten minutes, with 1-2 tons drilling about 0.5 meters, slowly pressurized to 6-8 tons drilling. Drill evenly, to prevent the sudden damage to the teeth, drilling pressure is generally not more than 10 tons. Encountered when drilling slow, to analyze, if it is because of the reasons for the sandwich should be patient, do not blindly add pressure.