A hybrid excitation mud generator

Abstract

The invention relates to a mixed excitation-type mud generator. A set of generator winding and a set of exciting winding are installed inside the generator. An impeller is impacted by mud to rotate, and accordingly the generator is driven to work. When the mud flow is increased, the output voltage of the generator can rise. When the output voltage is increased beyond the range of application, the exciting winding operates, the output voltage is decreased under the condition that the rotating speed is unchanged, and accordingly the operating requirements can be met. According to the mixed excitation-type mud generator, the internal structure of the generator is innovatively designed, and the reliable work requirement under the condition of wide-range mud discharge can be met without replacing the impeller by controlling the work of the generator winding and the exciting winding; and meanwhile, cost is effectively reduced, and the mounting and dismounting difficulty of products is greatly lowered.

Description

technical field [0001] The invention relates to the field of petroleum industry, in particular to a hybrid excitation mud generator. Background technique [0002] As oil drilling equipment enters the era of intelligence, downhole tools have an increasing demand for electrical energy. The use of mud generators for power supply can provide high-power electric energy safely and reliably, and has become the mainstream development trend of underground power supplies. The mud generator relies on the flowing mud to impact the turbine to rotate, thereby driving the generator to work, and the output power increases with the increase of the mud displacement. Due to the complex downhole environment, the mud displacement at the well site usually fluctuates within a wide range. In order to ensure normal power supply, the output voltage of the generator is required to meet the working requirements when the displacement is small, and the output voltage of the generator is required not to...

AI Technical Summary

Problems solved by technology

This increases a lot of work and greatly increases the cost. At the same time, due to the poor working conditions at the well site, the difficulty and risk of actual operation are also increased by lifting the drill and disassembling the mud generator many times.

At the same time, since the replacement of the impeller is carried out based on the expected flow rate, and the actual flow rate downhole usually has a certain deviation from the expected flow rate, this also leads to the impeller replacement not being able to fully achieve the expected effect

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