Your current location : Home >> News >> Industry News

ContactContact Us

Panjin Xinyilong Heat Shrinkable Products Co., Ltd

General manager: Wang Tianling

Mobile phone: +86-18642753155

Sales Manager: Wang Yuanlong

Mobile phone: +86-13942735666

(wechat: 332768233)

Tel: +86-0427-5845077

Fax: 0427-5845077

Email: 332768233@qq.com

Address: bawaizi Town, Panshan County, Panjin City, Liaoning Province

Website: www pjxylrs.com

Post code: 124115


Pipeline anti-corrosion heat shrinkable sleeve to protect oil and gas exploitation

2020-09-28 09:00:58
Times

The heat shrinkable sleeve is mainly responsible for the R & D and application of oil and gas field drilling, oil production, testing, surface, anti-corrosion, etc. In order to solve the outstanding corrosion problems of gathering and transportation pipelines in Tahe Oilfield under harsh corrosive environment, the corrosion prevention and control research team led by Zhao Haiyang has solved a series of key technical difficulties such as corrosion mechanism, corrosion law, corrosion monitoring and detection, corrosion prevention and control, and formed a corrosion prevention and control technology system for gathering and transportation pipelines suitable for oilfield medium environment, and industrial application ensured the oilfield High quality, high efficiency, safety and environmental protection development.




In terms of principle, "five high and one low" strong corrosivity in Tahe Oilfield refers to the electrochemical corrosion mechanism of gathering pipeline under high H2S content and low H2S partial pressure dominated by H2S. The corrosion product film of fexsy is damaged by Cl - and O2 to form pitting corrosion channel. Under such environment, the oil and gas gathering pipeline shows the corrosion law of "point corrosion as the main part and uniform corrosion as the auxiliary". The results show that the pitting corrosion rate of 20 steel in the presence of sediment is 8-20 times higher than that in the non sediment environment. The dissolved oxygen promotes the H2S / CO2 corrosion process, and the corrosion rate in the aerobic environment is 12.3 times higher than that in the anaerobic environment. There are four kinds of corrosion morphology in metal pipeline, such as isolated corrosion pit, connection pit group, groove and ulcer, while three corrosion patterns of non-metallic pipeline are resin fiber cutting, material degradation and hot melt adhesive aging, and most of them are concentrated at the bottom of the pipeline, downstream of the pipeline, change of flow state, change of elevation difference, branch line entrance, butt welding of pipe, spiral pipe weld and PVC lining.

缠绕带厂家

The anticorrosion of pipeline should start from monitoring. If there is no corresponding monitoring technology, there is no need to talk about the follow-up treatment. In Tahe oilfield, the traditional hanging coupon weight loss method can not accurately reflect the corrosion rate caused by the actual medium change, nor can it accurately capture the point corrosion information, and the traditional coupon weight loss detection and evaluation method can not accurately and quantitatively evaluate the point corrosion. Zhao Haiyang team has developed a corrosion monitoring device with hanging piece method in the pipeline to capture the real information of the corrosion status in the pipeline, and has established a quantitative evaluation method for point corrosion, which improves the accuracy rate of the monitoring data of the internal point corrosion of the pipeline by 65%, and the corrosion status in the pipeline can be truly reflected. The quantitative evaluation method of pitting corrosion realizes the detailed description of pitting depth, opening size and pitting density. The evaluation accuracy is increased by 10 times, the probability of pitting corrosion is increased by 10%, and the work efficiency is increased by 1 times.




How to treat the corroded pipeline? On the one hand, in view of the crack defects in the heat affected zone of the metal pipeline weld, the anti-corrosion heat shrinkable sleeve of Shandong Jinbo adopts carbon fiber reinforced "five rings and four axes" wet winding layer technology, so as to make the bearing capacity of the weak part of the weld crack defect reach the strength of the defect free part, and ensure the safe and reliable operation of the pipeline within the service life. On the other hand, for the metal pipelines with serious corrosion and steel skeleton, which are valuable for repair and utilization, the trenchless repair technology for low-cost buried pipelines is integrated and innovated. In order to solve the problems of temperature resistance and gas permeability resistance of intercalated pipes, hTPO repair material with corrosion resistance and temperature resistance of 75 ℃ is developed to realize the lining repair of super heavy oil gathering and transmission pipeline, and four numbers of improving gas permeability coefficient are developed The high barrier HBPE pipe material of the order of magnitude can realize the inner lining repair of natural gas gathering and transportation pipeline, the coating air supply extrusion coating repair technology, and the three-layer anti-corrosion structure of polymer mortar strengthening layer + solvent-free epoxy transition layer + solvent-free epoxy anti-corrosion coating is applied in the pipeline, so as to realize the repair of single well pipeline with multiple elbows and small caliber.




How to protect the new pipeline? Through the improvement of steel grades, Shandong Jinbo anti-corrosion developed a new kind of steel pipe bx245-1cr with high cost performance, which is suitable for the coexistence of h2o-h2s-co2-cl -. The spot corrosion rate of bx245-1cr is reduced by 37.8% and the uniform corrosion rate is reduced by 11.0% compared with 20%. Through the structural design of non-metallic pipe, the aromatic amine curing + 0.5mm thick epoxy resin rich inner lining + socket connection is developed The joint thermosetting non-metallic pipes solved the erosion and corrosion problems of high CO2 and high velocity in YAKELA gas field, participated in the compilation of a number of national and industrial standards for non-metallic pipes, and promoted the industry progress; formulated the enterprise standard, realized the standardized material selection and standardized application of non-metallic pipes in Tahe oilfield; innovated the construction technology of positive and reverse bidirectional pneumatic extrusion coating for 99.5% solid content solvent-free epoxy resin coating The problem of uneven coating thickness in one-way extrusion coating was solved, and joint coating of dn80-dn 100 pipe was realized; the chemical protection technology of corrosion inhibitor "pre film continuous injection batch treatment" was innovatively applied to achieve the target value of 0.1 mm pre film thickness of corrosion inhibitor and 0.016 mm / a of pipeline point corrosion rate, which ensured the safe transportation of natural gas


Tags

0

Recently Viewed:

Panjin Xinyilong Heat Shrinkable Products Co., Ltd

General manager: Wang Tianling

Mobile + 86-18642753155

Sales Manager: Wang Yuanlong

Mobile phone + 86-13942735666 wechat: 332768233

Tel.: + 86-0427-5845077

Fax: 0427-5845077

Email: 332768233@qq.com

Address: bawaizi Town, Panshan County, Panjin City, Liaoning Province

Website: www pjxylrs.com

Post code: 124115


下载.png

Mobile phone station

Liao ICP No. 19014764  All rights reserved: Panjin Xinyilong Heat Shrinkable Products Co., Ltd