Polyglycolic acid-based bridging agent, method for preparing the same, and use thereof

A modified polyglycolic acid (PGA) rope-type temporary plugging agent, prepared by modifying nanocellulose with glycolide, methyl silicone oil and stannous octoate, solves the problem of insufficient tensile properties and toughness of PGA rope-type materials, improves processing formability and yield, and ensures efficient temporary plugging effect in oil and gas well fracturing.

CN122302853APending Publication Date: 2026-06-30CHINA PETROCHEMICAL KUNSHAN CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROCHEMICAL KUNSHAN CO LTD
Filing Date
2024-12-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing PGA knotted temporary plugging materials have poor tensile properties and toughness, resulting in difficult processing and low yield.

Method used

Modified polyglycolic acid was prepared by using modified nanocellulose with glycolide, methyl silicone oil and stannous octoate, and the tensile properties and toughness of the material were improved by the knot-like structure.

Benefits of technology

It improves the tensile properties and toughness of materials, reduces fracture and deformation during processing, increases yield, reduces production costs, and achieves efficient temporary plugging in oil and gas extraction.

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Abstract

This invention provides a temporary plugging agent based on polyglycolic acid (PGA), its preparation method, and its application. The PGA-based temporary plugging agent includes modified PGA, and this material is specifically designed for knot-type temporary plugging agents. The modified PGA is prepared from the following raw materials: glycolide, methyl silicone oil, stannous octoate, and modified nanocellulose. The modified nanocellulose is prepared from an etherifying agent, sodium hydroxide, and nanocellulose. This temporary plugging agent exhibits better tensile strength and toughness, is easier to mold during processing, reduces breakage and deformation during processing, improves yield, and lowers production costs.
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