A sealed center through universal shaft assembly

By incorporating wire guide holes and an elastic conductive mechanism into the carbon steel universal joint assembly, the problems of high cost of titanium alloy universal joints and mechanical motion interference of carbon steel universal joints have been solved, enabling continuous transmission of electrical energy and signals, reducing production costs, and improving the reliability of drilling operations.

CN122129199APending Publication Date: 2026-06-02CHINA PETROCHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROCHEMICAL CORP
Filing Date
2026-01-08
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The titanium alloy universal joint of the existing center guide screw drill bit is expensive and easily deformed, while the carbon steel universal joint has mechanical motion interference in the guide structure, which affects its service life and reliability.

Method used

It adopts a carbon steel universal joint assembly, and sets up an elastic conductive mechanism by opening a wire passage hole in the middle of the hinge and the connecting rod. It uses conductive wire to realize the continuous transmission of electrical energy and signals, and sets a lubrication cavity at the contact point between the hinge and the connecting rod to ensure flexibility.

Benefits of technology

It reduced production costs, improved the reliability and lifespan of drilling operations, and ensured the reliable transmission of electrical energy and signals.

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Abstract

This invention discloses a sealed center-guided universal joint assembly, which is a carbon steel universal joint assembly including a connecting rod, an upper hinge, and a lower hinge. An elastic conductive mechanism is provided at the contact point between the hinge and the connecting rod, and a connector is provided at the end of the hinge furthest from the connecting rod. A conductive wire is provided in the middle of the hinge and the connecting rod, used to transmit electrical energy and signals to the drive shaft assembly. This invention utilizes the structural and material characteristics of the carbon steel universal joint, setting a conductive wire in the middle of the hinge and the connecting rod to achieve continuous transmission of electrical energy and signals. This enables the carbon steel universal joint screw drill bit to have the function of transmitting electrical energy and signals, reducing the production cost of the center-guided screw drill bit compared to a titanium alloy flexible universal joint assembly. The elastic conductive mechanism at the contact point between the hinge and the connecting rod allows for reliable transmission of electrical energy and signals when the hinge and the connecting rod are in a relative swinging state, under the compensation effect of the elastic conductive mechanism, improving the reliability of drilling operations.
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