“A review of well completion equipment” Schlumberger February, 2023 Well completion is a preparing a drilled and cased well for production. Depending on the place where the completion is made, oil and gas well completions are divided into upper completion, and lower completion. The upper completion includes safety valve. The lower completion includes Liner Hanger System and RMC gauges. Compact design of TRMAXX safety valve is one of the best of the field-proven Schlumberger technologies. This safety valve works by opening and closing the flapper. The safety valve protects a well from breakdowns in emergency situations. RMC gauge is necessary for measuring pressure and temperature in the well. All gauge terminations should be carried out at the wellsite following gauge-specific RMC procedures. Gauge Selection Criteria for specific installations depends on the conditions of their use, such as the presence of a corrosive environment, economic efficiency, moderation of conditions. A liner system of Schlumberger usually consists of a liner and a liner hanger. The drilling liner hanger is a cost-effective way to lengthen the hole without having to run casing, and in a production capacity, the liner serves as a conduit for the hydrocarbons.