Inner sleeve of ceramic liner is made of Zirconia while the outer sleeve is forged 45# steel,making liners extraordinary performance of high hardness and strength,and wear and corrosion resistance.Compared with metal liner,ceramic Zirconia liner has the following advantages:

1. Long service life.Ceramic liner has a longer life, approximately 3000 to more than 4000 hours,6 to 10 times of the bi-metal liner,which improves drilling efficiency by reducing mud pump for liner changing.

2. Advantages,such as wear resistance, corrosion resistance ,heat resistance ,pressure resistance ,and high hardness and strength,prolong the service life of plunger.

3. Suitable for deeper oil reservoir, poor drilling geological environment, offshore oil and gas development.

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