The operation experience of horizontal segment well in the southern Sichuan area within hard brittle shale layer Longmaxi formation demonstrates that high-density oil-based drilling fluid (HDOF) induced down-hole working condition, which is typically high-temperature, high-pressure and solid-phase-dominant, will directly impact stability wellbore wall. Focusing on bottom-hole osmotic pressure s...

The application of intelligent materials in drilling fluids has greatly reduced the investment human resources and effectively made up for shortcomings traditional fluids, such as insufficient directivity, poor adaptive ability difficult monitoring. Therefore, research is a valuable direction future oil gas industry. In this study, temperature-sensitive modified bentonite NIPAM-B developed by P...

High-temperature geothermal well resource exploration faces high-temperature and high-pressure environments at the bottom of hole. The all-metal turbodrill has advantages resistance corrosion good application prospects. Multistage hydraulic components, consisting stators rotors, are key to turbodrill. purpose this paper is provide a basis for designing blades with high-density drilling fluid un...