Outside casing window jetting tool and method

By combining the high-temperature molten products generated by the aluminothermic reaction with a pressure balancing mechanism, the problem of pressure imbalance in external window opening is solved, achieving a fast and low-cost window opening effect and simplifying the construction process.

CN122344992APending Publication Date: 2026-07-07CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2025-01-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In the external window opening operation, excessive or insufficient external pressure leads to pressure imbalance, which affects the spraying effect of molten products and makes it difficult to effectively melt through the target object.

Method used

The high-temperature molten product generated by the aluminothermic reaction is sprayed through the spraying assembly. Combined with the pressure balancing mechanism, the internal pressure and external pressure are balanced. The gas-generating material generates the spray gas to drive the molten product. The spraying direction and speed are controlled by the spraying pipe and check valve.

Benefits of technology

It enables rapid and low-cost window opening operations, ensures smooth spraying of molten products, simplifies the window opening process, and reduces construction difficulty and cost.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of drilling pipe external windowing, and provides a pipe external windowing jetting tool and method, the pipe external windowing jetting tool comprising: a main housing, a powder storage cavity is arranged in the main housing, and the main housing can be connected to a drill pipe; a thermite is arranged in the accommodating space; an igniter is arranged in the main housing and can ignite the thermite; a pressure balancing mechanism can balance the powder storage cavity and external pressure before the thermite is ignited; and a jetting assembly is communicated with the powder storage cavity and can jet reaction products of the thermite reaction to the outside of the main housing to melt through a target object. Through the above technical solution, a large amount of heat generated by the thermite reaction is used to heat the reaction products to a molten state, the jetting assembly jets the reaction products in the molten state to the target object, the target object is melted through, the windowing operation is quickly completed, and the pressure balancing mechanism can balance the internal and external pressures to avoid insufficient internal pressure, and the tool can be applied to cementing repair.
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