Slurry turbine alternating current generator

Abstract

The invention relates to a mud turbo alternator, which is used for providing power supply for the drilling instruments in the mine and comprises a turbine, a turboshaft, a sliding bearing, a magnetic coupling outer magnet rotor, a shielding case, a magnetic coupling inner magnet rotor, a generator and a case; A guide pulley for guiding the mud is arranged above the turbine; the inner magnet rotor is arranged in the upper part of the magnetic coupling outer magnet rotor and is coaxially connected with the generator; the shielding case is arranged between the outer magnet rotor and the inner magnet rotor; A standby high-temperature battery which is used when the generator is in failure or the pump is stopped is arranged in the upper air cavity inside the case. The invention has the advantages that the device is the complete non-contact power transference, the complete static seal, the seal is safe and reliable, the hydraulic vibration is small, the pressure is even, the hydraulic performance of the worm wheel is good; additionally, the mud turbo alternator is provided with a standby battery, therefore,, the operation is stable and reliable, the service life of the generator is long and the technology capability is good and the cost is low.

Description

technical field [0001] The invention relates to a downhole mud turbine alternator, which belongs to the technical field of generators and is an auxiliary device for underground drilling equipment in petroleum drilling engineering, and is used to provide power for downhole drilling instruments. Background technique [0002] With the widespread application of geosteering technology, logging-while-drilling technology and closed-loop drilling technology in the oilfield development process, the downhole measurement and control instrument system requires sufficient energy supply as a guarantee. At present, the technical solutions for the power supply of wireless measuring instruments while drilling in the drilling industry include: 1) Using lithium batteries for power supply, but relying entirely on lithium batteries has many disadvantages, such as limited energy and temperature ranges, poor safety, and pollution to the environment. High cost of use. 2) The downhole mud generator...

AI Technical Summary

Problems solved by technology

[0003] 1. The existence of the gearbox makes the manufacturing process complicated. For example, in order to prevent the mud from entering the gearbox, the sealing process is difficult. Under the washing of high-speed mud, any dynamic seal will involve a problem of durability. If the magnetic coupling cannot be used If the device realizes real non-contact power transmission, it loses the meaning of using magnetic coupling

Some original downhole generators always use rotating dynamic seals in the transmission or other mechanical coupling parts. Even if the dynamic sealing parts are soaked in oil and hydraulic balance technology is used, the life of the sealing parts will still be greatly affected: Under the scouring of high-speed sandy mud, the sealing parts of the dynamic seal may be damaged after dozens of hours of continuous work, or in a shorter period of time, which will adversely affect the use of the entire generator

[0004] In short, the existing patent publication number is CN1865693A, and the name is: downhole mud generator. Since the dynamic seal is not completely removed, the failure rate is increased, the life of the equipment is affected, the reliability and stability of the equipment are reduced, and at the same time, the Equipment manufacturing and operating costs:

[0005] 2. Due to cavitation and hydraulic vibration caused by poor inlet flow state, the worm gear has uneven pressure and large vibration, and the cavitation and hydraulic performance of the worm gear are poor:

[0006] 3. When any fault occurs in the generator system or the pump stops, it will cause a power outage, which will change the communication status of the instrument, and will also cause the loss of information and data stored during operation

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