Energy-saving borehole expanding device for mine construction

By coordinating the design of the enlarged ring frame and the adjustable gear disc, the borehole diameter is dynamically adjusted, solving the problem of uneven borehole enlargement, ensuring a regular borehole shape, improving construction efficiency and borehole stability, and adapting to complex formations.

CN120968442APending Publication Date: 2025-11-18ZHEJIANG MCC CONSTR GRP CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202511387629.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-26
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

The existing wellbore enlargement gasbag rings expand unevenly, resulting in an irregular wellbore shape, which affects the subsequent equipment running-in and cementing quality, and requires additional expansion work.

Method used

The system employs an enlarged ring frame, an adjustable gear plate, and a stabilizing expansion assembly. A servo motor drives the gears and adjusting arms to ensure the synchronous opening and closing of the enlarged frame. This, along with the side plates and expansion plates, forms an irregular ring structure, dynamically adjusting the wellbore diameter, enhancing the wellbore's bearing capacity, and enabling it to cope with complex formations.

Benefits of technology

To achieve uniform wellbore diameter and regular shape, reduce the need for secondary enlargement, improve construction efficiency and wellbore stability, adapt to complex formations, reduce local stress concentration, and simplify the construction process.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses an energy-saving well hole expanding device for mine construction, and particularly relates to the technical field of well hole expanding, the energy-saving well hole expanding device comprises an expanding ring frame, a well descending groove communicated with the interior of the expanding ring frame is formed in the top of the expanding ring frame, the well descending groove is communicated with a well hole, and a well hole expanding assembly is arranged between the expanding ring frame and the well descending groove; the borehole expanding assembly comprises a plurality of expanding frames movably connected between the expanding ring frame and the lower well groove and an adjusting fluted disc rotationally connected in the expanding ring frame, and the expanding frames are used for ensuring that the diameter of a borehole is uniform; through the arrangement of the expanding frames, the adjusting fluted disc and the gear, synchronous opening and closing of the expanding frames can be achieved, the expansion amount of the expanding frames is strictly consistent, it can be ensured that the diameter of a borehole is uniform, the shape is regular and is close to a perfect circle, standard borehole conditions are provided for follow-up supporting, equipment tripping-in and the like, and therefore the borehole expanding precision is higher, and the borehole shape is more regular.
Need to check novelty before this filing date? Find Prior Art