Plugging agent and preparation method thereof
By encapsulating a composite membrane around a modified resin as a sealing agent, the problem of poor sealing performance of existing sealing materials in complex formations has been solved, achieving precise sealing of cracks and enhanced sealing effect.
CN121950263APending Publication Date: 2026-05-01SINOPEC OILFIELD SERVICE CORPORATION +3
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Patent Information
- Application Number
- CN202411528106.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2026-05-01
AI Technical Summary
Technical Problem
Existing plugging materials are difficult to adaptively seal fractures in complex formations, and have poor thermal conductivity and weak compressive strength in drilling fluid environments, resulting in poor plugging effects.
Method used
A sealing agent using a modified resin-coated composite membrane forms a sealing layer by deformation at the glass transition temperature. The composite membrane material enhances thermal conductivity and mechanical properties, thereby improving the sealing effect.
Benefits of technology
It achieves precise sealing of cracks, improves the thermal conductivity, compressive strength and wear resistance of the sealing agent, and enhances the plugging effect in complex formations.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a plugging agent and a preparation method thereof. The invention provides a plugging agent. The plugging agent comprises modified resin and a composite film wrapping the modified resin, the composite membrane is prepared from poly (diallyldimethylammonium chloride), polyacrylic acid and graphene oxide. The invention provides a preparation method of a blocking agent. The preparation method comprises the following steps: (1) sequentially immersing modified resin into a PDDA solution and a PAA solution; and (2) taking out, sequentially immersing into a PDDA solution, a GO particle dispersion liquid, a PAA solution and a GO particle dispersion liquid, repeating for 30-200 times to obtain modified resin coated with a composite membrane material, and curing, drying and crushing the modified resin coated with the composite membrane material to obtain the plugging agent. The plugging agent prepared by wrapping the modified resin with the composite film material deforms in a temperature window, so that the interior of the crack is plugged, and the plugging effect is improved.
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