Epoxy glass fiber reinforced plastic and steel composite oil pipe and its preparation process

By applying epoxy resin in the middle of the inner lining of steel pipes and fiberglass pipelines, the structure of the fiberglass pipelines is strengthened, and the existing epoxy fiberglass and steel composite oil pipes are solved, and the wear resistance of threads is improved and reused.

CN115596895BActive Publication Date: 2025-03-18SHENGLI OILFIELD NORTH IND GRP
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Patent Information

Application Number
CN202211363007.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-02
Publication Date
2025-03-18
Estimated Expiration
2042-11-02

AI Technical Summary

Technical Problem

The existing epoxy fiberglass and steel composite oil pipes have problems such as insufficient pressure bearing, axial tensile strength and external impact resistance during use, and the thread wear resistance is insufficient, making it difficult to reuse.

Method used

A preparation process of epoxy fiberglass and steel composite oil pipes is adopted. By applying epoxy resin in the middle of the inner lining of the steel pipe and the fiberglass pipeline, the fiberglass pipeline is glued to reinforce the fiberglass pipeline to form a composite structure composed of the fiberglass layer, the epoxy fiberglass pipeline layer and the yellow jacket insulation layer.

Benefits of technology

The pressure bearing pressure, axial tensile strength and external impact resistance of fiberglass pipelines are improved, so that the thread wear resistance reaches the conditions of reusing use.

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Abstract

The present invention is applicable to the technical field of polymer composite materials, and provides an epoxy glass fiber reinforced plastic and steel composite oil pipe and a preparation process thereof, which is made of a steel pipeline and a glass fiber reinforced plastic pipeline. The epoxy glass fiber reinforced plastic and steel composite oil pipe includes a glass fiber reinforced plastic layer, an epoxy glass fiber reinforced plastic pipeline layer and a yellow jacket insulation layer arranged in sequence from the inside to the outside, and the glass fiber reinforced plastic layer and the epoxy glass fiber reinforced plastic pipeline layer are glued together with epoxy resin; a preparation process of an epoxy glass fiber reinforced plastic and steel composite oil pipe, comprising the following steps: epoxy glass fiber reinforced plastic pipeline layer production; pipe hoop production, preparation of glue solution, pipe hoop winding, curing and demoulding; pipe hoop connection with pipeline; cold drawing of glass fiber reinforced plastic pipeline to produce glass fiber reinforced plastic layer, compounding of the processed glass fiber reinforced plastic layer and epoxy glass fiber reinforced plastic pipeline layer; and yellow jacket insulation. Thereby, the present invention can improve the bearing pressure, axial tensile strength and external impact resistance of glass fiber reinforced plastic pipeline, so that the thread wear resistance reaches the condition of repeated use.
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