PDC rotary-cut composite drill bit and construction method thereof

Abstract

The invention provides a PDC (Polycrystalline Diamond Compact) rotary-cut composite drill bit and a construction method thereof. The invention discloses a PDC rotary-cut composite drill bit and a construction method thereof. A feeding mechanism; a fixing mechanism; the second nozzles are symmetrically and obliquely mounted in the rigid body; the first spray heads which are annularly distributed are arranged in the rigid body, and a plurality of limiting plates are obliquely mounted at one end of each first spray head at equal intervals; a compression mechanism; the multiple sliding grooves are formed in the side wall of the rigid body, and the suction rods are installed in the sliding grooves; the header pipe is mounted on the side wall of the rigid body, and the suction rod is connected to the side wall of the header pipe; the connecting rods are symmetrically mounted at the top end of the header pipe, and the two ends of the connector are in threaded connection with the connecting rods and the sliding rods respectively; and a limiting mechanism. The PDC rotary-cut composite drill bit and the construction method thereof have the advantages that repeated cutting of rock debris is avoided, the drill bit and the well bottom are effectively cleaned, and the mud wrapping rate of the drill bit is reduced.

Description

technical field [0001] The invention relates to the technical field of PDC drill bits, in particular to a PDC rotary cutting compound drill bit and a construction method thereof. Background technique [0002] PDC bit is the abbreviation of polycrystalline diamond compact bit, which is a commonly used drilling tool in the geological drilling industry. PDC bits have the characteristics of high drilling speed, long footage, few downhole accidents, etc., and have excellent comprehensive performance, and have been used more and more widely. [0003] However, when the PDC bit is drilling or drilling, the water hole is easy to be blocked, the chip removal groove and the blade are wrapped by the bottom hole, the well wall and the cuttings that have not been returned in time, resulting in the phenomenon of bit mud bag, causing pumping and pumping. The phenomenon of increasing pressure and decreasing ROP seriously affects the efficiency of PDC bit. [0004] Therefore, it is necessar...

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Problems solved by technology

[0003] However, when the PDC bit is in the process of running in or drilling, the water hole is likely to be blocked, the chip flute and the blade are wrapped by the bottom of the well, the wall of the well, and cuttings that have not been returned in time, resulting in mud bagging of the bit, resulting in pump failure. The phenomenon that the pressure rises and the drilling speed decreases seriously affects the efficiency of the PDC bit

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