A high-power DC stabilized power supply for oil drilling tools

Abstract

The invention relates to a high-power DC voltage-stabilized power supply for an intelligent petroleum drilling tool. The voltage-stabilized power supply comprises a rectification module, a main powersupply module, an auxiliary power supply module, a regulation and control module, a high-frequency inversion module and a voltage stabilization output module, wherein the rectification module is connected with the main power supply module and the auxiliary power supply module, and the auxiliary power supply module is connected with the main power supply module and the regulation and control module; the main power supply module is connected with the high-frequency inversion module, and the high-frequency inversion module is connected with the voltage stabilization output module. Wireless transmission of electric energy between short circuits of the intelligent petroleum drilling tool is achieved through the modes of series-parallel connection of the switch modules, design of a load balancing circuit and a protection circuit, arrangement of an overvoltage protection circuit, an undervoltage protection circuit, a load protection circuit and the like, and the safety and stability of the intelligent petroleum drilling tool during underground work are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas drilling, and in particular relates to a high-power direct current stabilized power supply for intelligent oil drilling tools. Background technique [0002] Petroleum is one of the important energy sources and plays an important role in economic and social development. Drilling technology is a strong support for oil exploration, especially automated intelligent drilling technology has become the focus of development of oil drilling technology. What follows is the development and use of various intelligent drilling tools in the ascendant, and intelligent drilling tools such as rotary steering and vertical drilling have been widely used and promoted. This type of tool establishes two-way data communication between the surface and the bottom of the well through remote wireless communication technology, and uploads information such as the azimuth, attitude, pressure, and temperature of th...

AI Technical Summary

Problems solved by technology

[0003] The current downhole power supply can be roughly divided into two types. One is to use mud pulses for AC-DC-DC conversion. This power supply method can provide stable and continuous DC power to meet the power consumption of core components of intelligent drilling tools. demand, but this kind of power supply implementation method is difficult for a single power supply module to meet the high-power power supply requirements, and it is difficult to solve the load balancing problem between modules by using a combination of multiple power supply modules; another way is to use battery power supply, high-temperature lithium battery pack It has been widely used in measurement downhole tools with low power consumption such as MWD and electronic pressure gauge. However, for intelligent drilling tools with drive execution modules such as rotary steerable and vertical drilling, the battery power supply method is limited by capacity and volume. Gaining practical application in smart drilling tools

[0004] In addition, smart drilling tools are usually composed of multiple functional shorts. The power supply and communication between different shorts are usually wired. There are many problems in the assembly connection of shorts, safety and stability during use. Defects and hidden dangers

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