Downhole high frequency pressure pulse generator

Abstract

The invention discloses an underground high-frequency pressure pulse generator. The underground high-frequency pressure pulse generator comprises a generator housing (1) and a bit short section (2); a connecting shaft (6) and a transmission shaft (13) are arranged inside the generator housing (1) in turn; a power drilling tool rotor (10) and a power drilling tool stator (11) which are matched with each other are arranged between the transmission shaft (13) and the generator housing (1); one end of the transmission shaft (13) is provided with a flange plate (131); a throttle plate (14) is arranged to be closely connected with the flange plate (131); the flange plate (131) is provided with a water hole (132); the throttle plate (14) is provided with a water channel (141). Compared with the existing drilling device, high-frequency pressure pulses are applied to a bit and accordingly the underground environment can be improved, the cuttings carrying capacity of the drilling fluid can be improved, the hold-down effect of the drilling fluid can be effectively reduced, and the drilling speed can be improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to an underground high-frequency pressure pulse generating device. Background technique [0002] With the development of geological exploration and drilling technology and the higher and higher requirements for drilling technology, the requirements for drilling equipment are also getting higher and higher. In recent years, my country has intensified its efforts to explore deep strata, and the number of deep wells drilled in the west, Sichuan Basin and surrounding areas has increased year by year. Under normal drilling conditions, PDC bits can drill through formations at extremely high speed and efficiency. However, PDC bits reduce depth of cut in hard, consolidated rock formations. This also means that the PDC cutter must drill by grinding the formation rather than shearing it, which reduces the rate of penetration (ROP) and greatly increases blade wear. At the same ...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: By applying high-frequency pressure pulses at the drill bit, the bottom hole environment can be improved, the drilling fluid’s rock-carrying ability can be improved, and the compression of the drilling fluid can be effectively reduced. effect, increase the drilling speed, and the existing drilling equipment can not achieve these effects

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