Current-shaping circuit for use with magnetic couplers downhole

A system comprising:

• an electronic tool;
• and
• a power delivery device configured to provide power to the electronic tool, the power delivery device comprising:
• a magnetic coupling device associated with a maximum torque output based on a size of the magnetic coupling device,
• an alternator coupled to the magnetic coupling device to convert kinetic energy received from the magnetic coupling device into a current, the kinetic energy being generated by the magnetic coupling device using a rotational force transferred across the magnetic coupling device, and
• a power converter device coupled to the alternator to shape the current from the alternator such that the maximum torque output of the magnetic coupling device is sufficient to cause the power delivery device to output a threshold current sufficient for operating the electronic tool.

A method comprising:

• determining a maximum size of a magnetic coupling device based on a size of a wellbore;
• determining a maximum amount of torque that can be transferred across the magnetic coupling device for powering a well tool, based on the maximum size of the magnetic coupling device;
• determining an amount of torque needed for providing power to the well tool;
• and
• configuring a system for using the magnetic coupling device to transfer the amount of torque needed for providing the power to the well tool, wherein the system includes a power converter device configured to shape a current such that the maximum amount of torque associated with the magnetic coupling component is sufficient to cause the power converter device to output an amount of current that is sufficient for operating the well tool.

A method comprising:

• determining an amount of torque needed for providing power to a well tool;
• determining a maximum size of a magnetic coupling device based on a size of a wellbore, wherein determining the maximum size of the magnetic coupling device involves determining dimensions of the magnetic coupling device based on a value of a constant component of the amount of torque needed for providing power to the well tool;
• and
• configuring a system for using the magnetic coupling device to transfer the amount of torque needed for providing the power to the well tool.