We have provided this service since 1976 and have done it in almost all drilling locations in Indonesia. Mud Logging Services is a solution for industrialists in the oil and gas sector. The scope of the services includes monitoring and recording drilling parameter data, where it will be done in real-time. The data generated will be used to analyze pressure formation prediction, rocks formation evaluation during drilling, alerting a loss or gain danger from mud drilling, maintaining the well-drilling problem, and detecting oil or gas. This service uses 3 mudlogging software that is applicable according to clients’ needs, which is: CMS (China Mudlogging System) Shinkai, Advantage SLS (Baker), GN 4 & GN 5 (Geoservices Schlumberger). One of our portfolios is the first Mud Logging done to the consortium for technological experts, Schlumberger’s project in Pertamina Hulu Mahakam. Some major companies that have used this service are Pertamina EP, Pertamina Hulu Energy, Pertamina Hulu Mahakam, Mont'dor Oil,Tately, Talisman Energy, Energy Mineral Langgeng. We have also succeeded in making the RTO system independent and used to monitor the well drilling operation in Pertamina EP. Elnusa’s RTO system can be accessed by Android and seen through real-time CCTV.