High-pressure fiberglass pipe products have entered the domestic oil field market for nearly 18 years, and have been widely used in fields such as oilfield water injection, oil gathering, crude oil long-distance transportation, sewage reinjection pipeline system and downhole oil pipes

And the dosage is still increasing year by year. The popularization and application of high pressure fiberglass pipes has indeed brought obvious economic benefits to oilfield users in terms of corrosion prevention and energy consumption reduction. However, in the process of application, a variety of problems are increasingly emerging. These problems bring many troubles to users, and even affect the application of glass pipes in oil fields. The author hopes to analyze the common problems in the application of high-pressure FRP pipes one by one, provide the reference basis for the end users of high-pressure FRP pipes when selecting materials, and promote the standardized production of products and the construction of standardized projects.

2 Relevant problems in the production of high-pressure glass pipes

According to the statistics of the National Composite Materials Association at the end of 2012, there are now more than 20 domestic enterprises engaged in the production of high-pressure FRP pipes, with a total number of more than 120 production lines. In the industry, although

However, all manufacturers are carrying out product production and quality control according to sYfr6267 specification or API15-HR specification, but the quality of high-pressure fiberglass pipes entering the market is mixed

Qi. The main reasons can be summarized as follows:

(1) Enterprises lack the ability of product design and performance evaluation

At present, there are only a few domestic enterprises that have passed the API15-HR monogram design certification. This shows that most enterprises do not have independent product design and

The ability to evaluate and test the long-term performance of products. Therefore, when issuing product data and chemical corrosion resistance data, we can only follow the path of others. Different from the mechanical processing industry

During the production of material products, any change in process parameters and subtle differences in raw material quality will lead to different performance of final products.

(2) The fierce competition in the market has led some enterprises to use low-end raw materials

With the increasing number of high-pressure FRP pipe manufacturers year by year, the market price competition is becoming increasingly fierce. Individual manufacturers have started to write about low-end cheap raw materials. For example, domestic E-glass fiber

The minimum price of the imported fiber is 6000 yuan per ton (even lower). High-pressure fiberglass pipe made of low-end cheap fiber has price competitive advantage, but

The hidden danger of product quality is left to users.

(3) Lack of strong quality supervision in procurement

At present, only a few domestic oilfield users or a few key construction projects use authoritative third-party inspection and supervision methods in the procurement stage of high-pressure FRP pipes. Pipes in most oil fields

The planning institute is responsible for the project design and the property management center is responsible for the bidding and procurement of the road project. Therefore, the problem products cannot be effectively shielded from the construction project.

To sum up, the oil field or other end users should first carry out the factory audit of the winning enterprise according to the industry or international specifications according to the international practice before purchasing the high-pressure fiberglass pipes

The products shall be randomly sampled and sent to an authoritative third party for inspection, and the whole process of manufacturing supervision shall be carried out during the production process to eliminate the delivery of unqualified products.