By May 9,2022, the future price of light crude oil from New York Mercantile Exchange closed at 109.59 a barrel, increased by Approx. 10.24% from April 25. The future price of crude oil from London Brent closed at $112.32 a barrel, increased by approx. 8.75% from April 25.2022.

1. Introduction of Float collar and float shoeFloat collar and float shoe are conventional necessary accessories of casing string substructure, usually connected in the bottom of casing string, used to guide the casing string smoothly into the well, to prevent cement back flow and create pressure th