A shock absorbing connection device for a casing string

CN224432459UActive Publication Date: 2026-06-30CHENGDU FUSAILIN ENERGY TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU FUSAILIN ENERGY TECHNOLOGY CO LTD
Filing Date
2025-06-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing casing string connection method lacks effective vibration reduction design, which causes vibration to be transmitted at the joint, generating a large impact force, which may cause damage or fatigue failure of the joint components, especially in deep well drilling or unstable formations.

Method used

Design a sleeve column vibration damping connection device including a connecting component. It uses springs and damping strips to absorb and attenuate vibrations in stages. The stiffness of the connecting component is adjusted by adjusting the spacing of the movable sleeve to absorb and attenuate vibrations in stages.

Benefits of technology

It effectively counteracts and attenuates vibrations, prevents vibration propagation, protects the connection between the casing units, and improves the service life and stability of the casing.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224432459U_ABST
    Figure CN224432459U_ABST
Patent Text Reader

Abstract

This utility model relates to a casing string vibration damping connection device, belonging to the field of drilling technology. The casing string vibration damping connection device includes: two casing string bodies; by setting a connection assembly, it not only facilitates the connection of the ends of the two casing string bodies by operators, but also effectively cancels out vibrations generated during operation by utilizing the springs and damping strips in the connection assembly, preventing vibration propagation; when operators connect multiple casing string bodies, the distance between the two movable sleeves can be adjusted by using threaded sleeves, thereby adjusting the deformable length of the springs and damping strips; using the aforementioned adjustable-hardness connection assembly, when using multiple casing string bodies, the hardness of the multiple connection assemblies can be gradually reduced from bottom to top to withstand the strong pressure and impact from the drill bit, drilling rig, and formation, gradually transitioning vibrations upwards to the softer connection assembly, thus absorbing and attenuating vibrations step by step.
Need to check novelty before this filing date? Find Prior Art