Cold fixed polycrystalline diamond compact drill bit
A polycrystalline diamond and composite drill bit technology is applied in drill bits, drilling equipment, earth-moving drilling, etc. to reduce drilling costs, improve overall work indicators, and overcome wear and tear.
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Embodiment 1
[0015] Embodiment 1: The upper body of the drill bit (1) and the lower body of the drill bit (2) are fixed together by the electric welding layer (18), and the center of the drill bit is longitudinally opened with a main water hole (3), and the lower part of the main water hole (3) is connected to 8 water diversions hole (6), each water diversion hole (6) is equipped with a water nozzle (4) and a nozzle sealing ring (5), and three long blades (10) and three A short blade (11), a cylindrical polycrystalline diamond (7) and a diameter-gauge PDC sheet (8) fixed by interference cold pressing are fixed at the gages of the long blade (10) and the short blade (11), the long The cutter wing (10) and the cutting teeth (9) on the short cutter wing (11) use the retaining ring (14) to fix the PDC piece (8) with the PDC piece groove (17) to the drill bit column (12) inside the hole.
Embodiment 2
[0016] Embodiment 2: The upper body of the drill bit (1) and the lower body of the drill bit (2) are fixed together by the electric welding layer (18), and the center of the drill bit is longitudinally opened with a main water hole (3), and the lower part of the main water hole (3) is connected to 10 water diversions hole (6), each water diversion hole (6) is equipped with a water nozzle (4) and a nozzle sealing ring (5), and four long blades (10) and The four short blades (11), the long blades (10) and the short blades (11) are fixed with a rectangular polycrystalline diamond (7) and a gauge PDC sheet (8) fixed by interference cold pressing. The cutting teeth (9) on the blade (10) and the short blade (11) use the stopper pin (15) to fix the PDC sheet (13) with the PDC sheet groove (17) in the hole of the tooth post (12) Inside.
Embodiment 3
[0017] Embodiment 3: The upper body of the drill bit (1) and the lower body of the drill bit (2) are fixed together by an electric welding layer (18), and the center of the drill bit is longitudinally opened with a main water hole (3), and the lower part of the main water hole (3) is connected to 6 water diversions hole (6), each water diversion hole (6) is equipped with a nozzle (4) and a nozzle sealing ring (5), and three long blades (10) and two short blades are distributed on the lower end surface of the lower body of the drill bit (2). Wing (11), long blade (10) and short blade (11) have polycrystalline diamond (7) and a gauge PDC sheet (8) fixed by interference cold pressure, long blade (10) With the cutting teeth (9) on the short knife wing (11), the PDC sheet (13) is placed in the hole of the tooth post (12) in clearance fit, and the baffle plate (16) is spot welded and fixed on the end face of the tooth post (12).
[0018] The foregoing embodiments are applicable to a...
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