Pulse drill pressure generator

Abstract

The invention relates to a pulse drill pressure generator. The pulse drill pressure generator is composed of a pulse hydraulic pressure generation system and an impact type drill pressure transmissionsystem; the pulse hydraulic pressure generation system comprises an upper connector, an upper shell, an alignment bearing, a spiral turbine and a shaft valve system, and the shaft valve system comprises a turbine shaft, a bearing, a bearing end cover, a valve element, a valve seat and a balance sleeve; and the impact type drill pressure transmission system comprises a lower connector, a lower shell, a disc spring group and a pressure bearing head, the generator generates periodic pulse hydraulic pressure and transmits the hydraulic pressure to a drill bit to form periodic fluctuation drill pressure, the drill pressure transmission system is simple in design and structure, the disc spring group generates periodic compression and elastic recovery under the periodic changing liquid pressureaction, the pulse hydraulic pressure acting force can be directly transmitted to the shaft bottom drill bit, and the pressure transmission speed and efficiency are high.

Description

technical field [0001] The invention relates to a pulse pressure-on-bit generator capable of generating periodic pulse hydraulic pressure and transmitting the hydraulic pressure to a drill bit to form periodically fluctuating pressure-on-bit, belonging to the technical field of downhole impact speed-increasing tools in the oil and gas development process. Background technique [0002] After years of exploration and development, the reserves of shallow oil and gas resources in my country have continued to decrease, and drilling and development projects have gradually shifted to deep formations, unconventional oil and gas resources, and offshore oil and gas fields, which are dominated by hard rock oil layers such as carbonate rocks. The pressure loss of the drilling circulation medium is large, the pressure on bit cannot be effectively applied, and the mechanical speed of penetration is low. In conventional drilling operations, the drilling pressure is usually applied by the we...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor impact load resistance, low working efficiency and slow pressure transmission speed of the current percussive drilling pressure-on-bit generator, the present invention provides a pulse pressure-on-bit generator, which can generate periodic liquid pulse pressure and transmit it through the pressure on drill The system forms a pulsed WOB acting on the drill bit at the bottom of the well, and with the rotary torque provided by the drilling rig or the downhole power drilling tool, the operation mode of rotary percussion drilling can be realized at the bottom of the well, so as to increase the mechanical penetration rate and improve the drilling work efficiency

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