Rotary impact shock jet PDC (polycrystalline diamond compact) bit
A jet-type and drill bit technology, which is applied in the direction of drill bit, liquid/gas jet drilling, and rotary combined drilling driving device, etc., can solve the problems of cuttings starting and suspension under the drill bit, etc., so as to improve drilling efficiency and improve drilling efficiency. Flow field distribution, the effect of avoiding mud bag
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] Such as figure 1 , figure 2 As shown, the rotary percussion oscillating jet type PDC drill bit described in this embodiment has a main body including three parts: the indenter I, the single control channel monostable jet element II and the bit body III. Two blind holes are respectively opened in the drill body III, wherein the left blind hole 9 is located under the large outlet 8 of the jet element, and communicates with two large nozzles 11, while the right blind hole 10 is located under the small outlet 7 of the jet element, It is connected with two small nozzles 12; there is a central channel 1 connected to the nozzle 2 of the single-control channel monostable jet element inside the pressure head I; the single-control channel monostable jet element II is a complete rectangular block, passing through the block The required flow channel is pr...
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