PDC bit is the abbreviation of Polycrystalline Diamond Compact Bit, also known as Polycrystalline Diamond Cutting Block Bit or Composite Chip Tooth Bit. The bit body of the matrix body pdc bits is
sintered by the same method and process as the sintered natural diamond bits and TSP bits with cast tungsten carbide powder, leaving a nest on the working surface of the bit when sintering, and
then welding the composite piece directly on the nest. PDC bit has been widely used in oil drilling for its advantages of fast drilling speed, long life and high feed rate.
Features Of Matrix PDC Bit
The upper part of the Matrix PDC Bit is made of steel and the lower part is made of tungsten carbide wear-resistant alloy. The PDC cutting teeth are welded to the pre-set grooves of the body with
low temperature welding material. The tungsten carbide body has high hardness and is resistant to erosion, so the Matrix PDC bit has long life and high feed rate, and is widely used.
The matrix body pdc drill bit is mainly used for difficult to drill formations with high gravel and compressive strength. Its own strength is higher than that of steel body bits.
Matrix PDC bit have high hardness and wear resistance of cutting teeth due to the use of polycrystalline diamond composite as cutting element.
Production And Use Of Matrix PDC Bits
Production method:
The Matrix PDC bits are made of various plastron powders and metal steel frames sintered in the mold at a temperature of 1000-15000 degrees, and then butt-welded to the joint. The shape of the
casing, i.e. the working profile, mainly refers to the geometry of the working surface and the size of the working area, which is designed according to the application of different lithologies. The
casing is the matrix of inlaid diamond particles, which is made of certain particle size of cemented carbide powder plus appropriate fusible metal as binder, and pressed sintered surface.
Method of use:
PDC bits work best in soft to medium-hard formations with large homogeneous sections. It is not suitable for drilling gravel layers and soft-hard interlaced formations.
Use low drilling pressure, high speed and large displacement drilling, the bit is used effectively.
Before the drill bit is lowered into the well, the bottom of the well should be cleaned to ensure that there is no metal fallout.
When the drill bit first comes down the well, run and use small drilling pressure and low rotational speed, and resume normal drilling after the bottom of the well is formed.
PDC bits are integral bits without any moving parts, which are suitable for high speed turbo drilling.
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