Downhole pressurizer and downhole pressurization method

Abstract

The invention provides a downhole pressurizer and a downhole pressurization method. The downhole pressurizer at least comprises a check valve, an upper connector, an outer barrel, a core shaft and a lower connector, wherein the check valve is used for being connected with pressure fluid, the upper connector is connected to the lower end of the check valve, the outer barrel is fixedly connected to the lower end of the upper connector, the core shaft is arranged in the outer barrel in a penetrating mode, the upper end of the core shaft is connected with the inner wall of the outer barrel in a sliding mode through a hollow piston, and the lower connector is used for being connected with the lower end of the core shaft and a nozzle. The downhole pressurization method includes the steps that the weight of a drill stem is pressurized to the piston, a drilling tool is pressurized to the upper connector, the outer barrel is driven to move downwards relative to the core shaft, the distance between the piston and the upper connector is shortened accordingly, slurry inside the core shaft is compressed, and therefore the slurry is sprayed at a nozzle at a higher flow rate. According to the downhole pressurizer and the downhole pressurization method, the weight of the drill stem can be converted into bit pressure, pressure of original circulating fluid before flowing out of a bit nozzle is multiplied, damage to the stratum is accelerated, and the speed of a drilling machine is improved.

Description

technical field [0001] The invention relates to a drill string used in oil and gas drilling engineering. Background technique [0002] In oil and gas drilling engineering, increasing the injection pressure at the bottom of the well is an effective way to speed up the drilling machinery. Many tests have been carried out at home and abroad, but due to unreasonable structure, unqualified materials, short service life and high cost, there is no can be promoted. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a bottom hole booster and a bottom hole booster method, which can convert drilling pressure in drilling engineering into pump pressure to increase injection pressure. [0004] In order to achieve the above object, the technical scheme adopted in the present invention comprises: [0005] A bottom hole booster, characterized in that it at least includes: [0006] Check valve for connecting w...

AI Technical Summary

Problems solved by technology

[0002] In oil and gas drilling engineering, increasing the injection pressure at the bottom of the well is an effective way to speed up the drilling machinery. Many tests have been carried out at home and abroad, but due to unreasonable structure, unqualified materials, short service life and high cost, there is no able to promote the use of

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