Electric underground pushing device

By using electroactive combination blocks to provide pushing force in the downhole pushing device, the problem of pushing force attenuation of hydraulic system at high temperatures is solved, and the pushing force output is achieved that is stable and unaffected by temperature and vibration is met, and the drilling needs of deep well ultra-deep well drilling is met.

CN119641237AActive Publication Date: 2025-03-18CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202311202835.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-18
Publication Date
2025-03-18
Estimated Expiration
2043-09-18

AI Technical Summary

Technical Problem

The existing hydraulic push-relief system has attenuated under high temperature downhole environments, and the mechanical structure has insufficient compressive and wear resistance, which cannot meet the needs of deep well ultra-deep well drilling.

Method used

An electric downhole push-back device is adopted to provide push-back force through the electroactive combination block. The electroactive combination block is stacked longitudinally by the entire piece of electroactive material, and it is retracted or expanded by power on and off to achieve push-back force output.

Benefits of technology

The problem of hydraulic system attenuation at high temperatures is solved, and the stable output of pushing force is not affected by temperature and vibration is achieved, the number of components is reduced, the installation space is saved, and the compression resistance of the mechanical structure is improved.

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Abstract

The invention relates to the technical field of underground pushing devices, in particular to an electric underground pushing device which comprises an outer cylinder, a rotating shaft and an electroactive combination block, the outer cylinder is sleeved on the outer side of the rotating shaft, and at least two mounting holes which are through inside and outside are evenly distributed in the middle of the outer cylinder along the circumference. And each mounting hole is internally provided with an electroactive combination block which can retract or expand when powered on or powered off. The electro-active combined block pushing force device is reasonable and compact in structure and convenient to use, solves the problem that a hydraulic pushing device adapts to working conditions such as ultrahigh temperature and high vibration by arranging a pure electric electro-active combined block pushing force device which does not need hydraulic pressure, can be applied to static pushing type vertical drilling tools, rotary guiding tools and the like, and has wide application prospects. The deep well and ultra-deep well deviation preventing and guiding drilling device has the advantages of being not limited by temperature and not affected by vibration, stable in output force, small in number of components and capable of releasing the mechanical structure pressure-resistant design size.
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