Cabot ocean explorer rotating drilling, workover and service rig for offshore work Comprising Model 2042 Drum winch with 102 ft, 250,000-pound capacity telescoping derrick. Mounted on unitized machinery basis and master structure specially designed for operation on Petrobras fixed offshore oil production platforms. Drawworks powered by two Detroit Diesel Engines model 8V-71N-65 with Allison CDT750 Transmission each engine, compounded with Cabot Model 650. Rotary table 17.1/2″ driven by Drawworks. The rig is furnished with specially designed structural components to accommodate the geometry and load bearing eccentricities of the several Petrobras fixed platforms and further designed to work on 20 and 45 ft skid beam spacing. including well control circulating and fluid systems; hydraulic power sub and lifting equipment; installations to accommodate technicians and operators; special system of light capacity hydraulic jacks to slide on both directions the rig in order to cover three longitudinal and to transverse rows of wells.