Horizontal wells are one of the effective means for the development of low-permeability oil and gas reservoirs, as well as unconventional oil and gas reservoirs such as shale gas and coal gas layers. From 2021 to 2022, one drilling rig of PetroReland Petroleum participated in the development of low porosity and low-permeability oil and gas fields in the Ordos Basin, China; From 2016 to 2022, two 4000 meter drilling rigs and fracturing equipment were organized to participate in the exploration and development of low-permeability oil fields in the JR oilfield in Congo.