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

Abstract

The invention relates to a high-power DC stabilized power supply for an intelligent drilling tool, comprising a rectification module, a main power module, an auxiliary power module, a control module,a high-frequency inversion module and a voltage-stabilized output module. By adopting a mode of series and parallel connection of switch modules, the problem of insufficient output power of the singleswitching power supply module is solved, and the design of a 300W high-power power supply is realized; by designing a load equalization circuit and a protection circuit, four 36V / 2.5A parallel powersupplies are adjusted through the load equalization circuit, so that each power supply is evenly loaded, by setting an overvoltage circuit, an undervoltage circuit and a load protection circuit, the safety and stability of the intelligent drilling tool when working underground are realized; by designing the high-frequency inversion module and the voltage-stabilized output module, wireless transmission of electrical energy between shorting of the intelligent drilling tool is realized, the short-circuit installation steps are simplified, and the working efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of oil and natural gas drilling, and particularly relates to a high-power DC stabilized power supply for intelligent drilling tools. Background technique [0002] With the application of computer technology, precision measurement and control technology, and large-scale integrated circuits in the field of petroleum drilling, 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 ground and the bottom of the well through remote wireless communication technology, uploads the position, attitude, pressure, temperature and other information of the bottom of the well to the ground, and the ground operator adjusts the work of the tool in real time according to the drilling design and bottom conditions. State, the command is transmitted from the ground down to the bottom hole intelligent drilling tool...

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

Images