High-temperature resistant oil well rubber sealing ring material and preparation method thereof

Abstract

The invention provides a high-temperature resistant oil well rubber sealing ring material and a preparation method thereof. The rubber sealing ring material is composed of three parts: the inner layer and the outer layer are both composed of high-strength knitted cloth added with inorganic materials such as carbon black, nano zirconia, and the like; the middle layer is prepared through following steps: compounding rubber powder, which has been desulfurated through thermal mechanical shearing, with fluoro-rubber, adding a compatilizer to increase the compatibility between the rubber powder and the fluoro-rubber; then adopting high-strength knitted cloth, which has been subjected to a surface treatment, as the support body, adding inorganic filling materials such as carbon black, nano zirconia, and the like, and subjecting the knitted cloth added with inorganic filling materials to a high-temperature sulfide cross-linked forming so as to obtain the middle layer. The sealing ring knitted cloth and the rubber base material are subjected to processes of multi-layer compounding and sulfide forming. The sealing ring prepared by the invention has a good high-temperature resistant performance, and is capable of being used in areas with a large temperature difference for a long period.

Description

technical field [0001] The invention belongs to the technical field of rubber materials, in particular to a rubber sealing ring material and a preparation method thereof. Background technique [0002] Petroleum is a basic energy closely related to people's lives. The rapid development of the petroleum industry plays a very important role in the development of the national economy. As the amount of recoverable crude oil decreases year by year, the importance of achieving sustainable development, crude oil extraction The efficiency of oil production and the improvement of ultimate recovery factor have gradually become the issues considered by oil workers. [0003] The study found that in the process of crude oil extraction, the rod pumping equipment plays a major decisive role, and the wellhead polished rod sealing device is the most important in the rod pumping equipment, and the sealing device in the wellhead sealing device of the pumping unit The packing produces sliding f...

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Problems solved by technology

[0003] The study found that in the process of crude oil extraction, the rod pumping equipment plays a major decisive role, and the wellhead polished rod sealing device is the most important in the rod pumping equipment, and the sealing device in the wellhead sealing device of the pumping unit The packing produces sliding friction with the sucker rod 24 hours a day, and the temperature difference across the country is very large, which will accelerate the aging of rubber sealing packing commonly used in oil fields, reduce its service life, and more seriously, cause Oil spill

At present, the sealing packing materials used in the market are mainly various kinds of packing, such as graphite packing, aramid packing, PTFE packing, carbon fiber packing, which have strong temperature resistance and solvent resistance. The research found that , the biggest problem facing the packing during use is frequent failure. The service life of oil wells with relatively harsh environments is less than 24 hours, and the best is only 1 to 2 months. If in the actual production process, the packing fails and there is no If it is discovered in time and appropriate remedial measures are taken, oil and gas will leak and cause environmental pollution and other problems, and more seriously, large-scale fires will occur, causing certain harm and loss to the country's energy and people's health

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