Well hole cleaning method, device and equipment and storage medium

By analyzing the stress on the wellbore and optimizing its parameters, the minimum annular return velocity and target annular flow rate were determined, and the pump pressure and drilling fluid displacement were optimized, thus solving the problem of low wellbore cleaning efficiency, achieving downhole safety, and increasing drilling speed.

CN120626092APending Publication Date: 2025-09-12SINOPEC OILFIELD SERVICE CORPORATION +2
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Patent Information

Application Number
CN202510792194.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-13
Publication Date
2025-09-12

AI Technical Summary

Technical Problem

Existing technologies are unable to efficiently and specifically clean the wellbore to be cleaned, and are unable to effectively return the rock cuttings formed by the drill bit breaking the rock, resulting in increased downhole friction and the occurrence of complex situations such as drill sticking.

Method used

By obtaining the engineering data, cuttings parameters and drilling fluid performance data of the target wellbore for stress analysis, the minimum annular return velocity and target annular flow rate are determined, the pump pressure and drilling fluid displacement are optimized, and the wellbore is cleaned in combination with the drilling fluid performance and wellbore conditions.

Benefits of technology

It achieves efficient cleaning of the wellbore, reduces downhole friction, prevents drill sticking, and improves drilling efficiency.

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Abstract

The invention discloses a borehole cleaning method, device and equipment and a storage medium, and relates to the field of oil and gas drilling and completion engineering.The borehole cleaning method comprises the steps that target engineering data, to-be-cleaned rock debris parameters, drilling fluid performance data and wellbore condition data of a target borehole are obtained, and stress analysis is conducted on the to-be-cleaned rock debris to obtain a stress analysis result; based on the stress analysis result, the minimum annulus return speed is determined so as to determine the target annulus flow speed corresponding to the target borehole cleanliness; determining a target drilling fluid displacement based on the target annulus flow rate, and determining a to-be-optimized pump pressure based on the target drilling fluid displacement, the drilling fluid performance data and the wellbore condition data; if the to-be-optimized pump pressure is not larger than the rated pump pressure, the to-be-optimized pump pressure is determined as target pump pressure, and target parameters are determined based on the target pump pressure so that the target borehole can be cleaned based on the target parameters; wherein the target parameters comprise drilling fluid performance data, top drive rotating speed and target drilling fluid displacement. According to the invention, efficient cleaning of the to-be-cleaned borehole is realized.
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