Experimental apparatus for acid fracturing

CN224338965UActive Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2025-06-18
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing indoor hydraulic fracturing simulation experimental devices cannot perform multi-stage alternating injection fracturing processes, and the equipment is susceptible to acid corrosion, is complex to operate, affects the environment, and cannot flexibly switch injection modes.

Method used

An experimental device was designed, comprising a liquid storage chamber, a sealed top cover, a sealed bottom cover, and a base. Through the combination of infusion pipelines and multiple valves, multi-stage alternating injection of acid can be achieved, and the injection mode can be switched at any time. Acid-resistant alloy materials and a sealing structure are used to prevent acid leakage.

Benefits of technology

It enables convenient operation of acid fracturing experiments, prevents the environmental impact of acid, and is economical, flexible, and easy to operate. It meets the needs of multi-stage alternating injection and provides strong research support.

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Abstract

This invention provides an experimental apparatus for acid fracturing, comprising a liquid storage chamber, a sealing top cover disposed above the liquid storage chamber, a sealing bottom cover disposed below the liquid storage chamber, and a base disposed below the sealing bottom cover. The apparatus further includes infusion lines connected to the sealing top cover and the sealing bottom cover respectively. The liquid storage chamber is divided into an upper chamber and a lower chamber for containing acid by a piston top plate. The infusion lines communicate with the sealing bottom cover and the upper and lower chambers respectively through the sealing top cover.
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