Leaf motor drive -type under well pressure voltage devices and methods

Abstract

The invention provides a vane motor-driven downhole pressurization device capable of generating ultra-high pressure jets, which is suitable for increasing the drilling speed of deep wells and ultra-deep wells. The supercharging device consists of five parts, including the housing, the splitter unit, the power assembly, the transmission assembly, and the supercharging assembly. It is an underground supercharging tool specially used for ultra-high pressure jet drilling. The upper end of the device is connected to a drill collar or power drilling tool, and the lower end is directly connected to the drill bit. During normal drilling, the drilling fluid flows symmetrically into the vane motor assembly through the sub-fluid, and the vanes generate torque under the action of the drilling hydraulic pressure difference and drive the crankshaft to rotate, causing the connecting rod and the plunger of the plunger pump to reciprocate up and down, and part of the high-pressure drilling The fluid rises to ultra-high pressure, and the ultra-high-pressure fluid passes through the ultra-high-pressure nozzle on the drill bit to form an ultra-high-pressure jet, which is transmitted to the bottom of the well to break rocks, so as to improve the efficiency of drilling and breaking rocks. The invention designs a pair of symmetrical vane motors to provide continuous power for the plunger pump, so that the ultra-high pressure jet can continuously act on the bottom of the well.

Description

technical field [0001] The patent of the present invention relates to a deep-well ultra-high pressure jet drilling downhole supercharging device used in the field of petroleum and natural gas engineering drilling, especially a downhole supercharging device that drives the crankshaft connecting rod mechanism through a vane motor to provide continuous reciprocating power for the plunger pump. device, and the present invention is particularly applicable to the field of deep well and ultra-deep well drilling. Background technique [0002] With the exploration and development of oil and gas resources in deep formations, complex geological conditions, low ROP and high drilling costs have become the salient features of deep and ultra-deep wells. Ultra-high pressure jet drilling is one of the most effective methods to use hydraulic energy to assist mechanical drilling. Ultra-high pressure jet drilling is to increase the pressure of the drilling fluid to ultra-high pressure through ...

AI Technical Summary

Problems solved by technology

The downhole booster devices that have been designed include static booster devices, separated downhole booster devices, jet booster devices, centrifugal downhole booster devices, shock-absorbing booster devices, and screw downhole booster devices. Most of them cannot guarantee a continuous power source to provide power for the continuous pressurization of drilling fluid, and the vibration, shock and wear of internal components are relatively large, thus affecting the working life of the tool in the downhole

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