Compound pendulum straightening and speed-up tool for drilling

By designing a pendulum-driven speed-up tool, which utilizes drilling fluid to drive the impeller mechanism and impact mechanism to generate vibration, the problems of drill bit stick-slip vibration and wellbore irregularities in deep well drilling are solved, thereby improving drilling speed and drill bit life, and reducing costs and risks.

CN119686630BActive Publication Date: 2025-11-18CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202510154881.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-02-12
Publication Date
2025-11-18
Estimated Expiration
2045-02-12

AI Technical Summary

Technical Problem

During the drilling of deep and ultra-deep wells, the formation is highly undulating and the lithology is varied, which leads to severe stick-slip vibration of the drill bit, rapid drill bit wear, and increased wellbore size. This affects the mechanical drilling rate and drilling fluid return. In addition, the irregular wellbore increases drilling costs and difficulty.

Method used

Design a drilling tool with a double-swing mechanism for deviation correction and speed enhancement. The tool uses drilling fluid to drive the impeller mechanism to rotate, which in turn drives the impact mechanism to generate periodic and axial vibrations. This releases the energy accumulated in the drill string when the drill bit cuts the formation, reduces stick-slip vibration, increases the service life of the drill bit, and maintains vertical drilling by stabilizing the central shaft and the double-swing mechanism, thereby reducing wellbore irregularities.

Benefits of technology

It effectively reduces stick-slip vibration, extends drill bit life, increases mechanical drilling speed, reduces wellbore irregularities, lowers drilling costs, reduces tripping time and well cleaning frequency, and ensures the stability and efficiency of the drilling process.

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Abstract

The present application relates to the technical fields of drilling tools, and discloses a complex pendulum straightening and speed increasing tool for drilling, which comprises a drill bit connector, a supporting short circuit and an impact mechanism. The drill bit connector comprises a connecting section and an eccentric section. The impact mechanism is rotatably arranged in the supporting short circuit and is eccentrically arranged with the eccentric section. The impeller mechanism is rotatably arranged in the supporting short circuit and is connected with the impact mechanism. The impeller mechanism is provided with a flow channel for the flow of drilling fluid. When the drilling fluid flows along the flow channel, the impeller mechanism is driven to rotate. The present application can greatly reduce the irregular problems of the borehole caused by the jumping of the drill and the vortex of the drill bit during the vertical drilling process, increase the service life of the drill bit, greatly reduce the risks caused by the irregular borehole during the later casing and other operation processes, reduce the number of well passes, reduce the operation cost and reduce the construction period.
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