They are composed of a pressure-bearing metal outer shell and high wear resistant ceramic inner liner. After precision machining and assembly, it is integrated into one body, and the overall mechanical performance is superior.Compared with bi-metal liner, the service life of ceramic liner is 5-10 times higher.Its maximum can reach 4000 hours and minimum at least 2000 hours.
The ceramic liners are not only workable for drilling and development environments of deep oil reservoirs and harsh geological structures, but also can be used for offshore oil and natural gas exploitation.