Drilling plugging and fracturing integrated device self-adaptive to well wall stability

The integrated drilling, plugging, and fracturing device with adaptive wellbore stabilization enables integrated drilling, plugging, and staged fracturing operations. This solves the problems of long construction period, high cost, and poor wellbore stability in existing technologies, improves construction efficiency and wellbore stability, and ensures fracturing effect.

CN122447035APending Publication Date: 2026-07-24GUIZHOU SHALE GAS EXPLORATION & DEV CO LTD
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Patent Information

Application Number
CN202610807895.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-05
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing technology involves drilling, plugging and fracturing in stages, which results in long construction periods, high costs, poor wellbore stability, and unsatisfactory fracturing effects. In addition, repeated tripping of the tubing string can easily cause secondary damage to the wellbore.

Method used

An integrated device for adaptive wellbore stabilization, including drilling plugging and fracturing, is designed. It comprises a drill bit, drill pipe, drilling section, sensors, plugging material bin, jet orifice, and controller. The device monitors the wellbore status in real time through sensors, automatically identifies the leaking layer, and sprays plugging particles to achieve integrated operation.

Benefits of technology

It integrates drilling, plugging, and staged fracturing, shortens the construction period, improves wellbore stability and fracturing effect, reduces construction costs, and avoids secondary damage and blockage of the wellbore.

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Abstract

The invention discloses a self-adaptive well wall stable while-drilling plugging and fracturing integrated device. Belongs to the technical field of oil and gas drilling engineering equipment. The drill comprises a drill bit and a drill rod, a while-drilling section pipe is arranged between the drill bit and the drill rod; an inner cavity of the while-drilling section pipe is communicated with the drill rod; a sensor for identifying whether a leakage layer appears or not is mounted on the while-drilling section pipe; a leaking stoppage bin is further arranged in the while-drilling section pipe; degradable leaking stoppage particles are filled in the leaking stoppage bin, and an electric control valve is arranged at the discharging end of the leaking stoppage bin; a plurality of jet flow holes are formed in the side wall of the while-drilling section pipe; a controller is also packaged on the while-drilling section pipe; the sensor and the electric control valve are both electrically connected with the controller, and the controller can control the electric control valve to be opened, so that the degradable leaking stoppage particles in the leaking stoppage bin are sprayed to the well wall through the jet hole; the problems of long construction period, high cost, poor well wall stability and poor fracturing effect of staged operation of well drilling, leaking stoppage and fracturing in the prior art are solved.
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