Surplus Aker MH MDDM 1250 Top Drive

High-capacity surplus MDDM 1250 modular top drive (Aker / Aker Kvaerner MH / Maritime Hydraulics lineage). Developed with Transocean for 6th-generation ultra-deepwater drillships. First unit went on Discoverer Clear Leader; designed for high-spec offshore drilling, long-reach wells, and low downtime. Rated performance (OEM class) Hoisting / hook load: 1,250 short tons (1,134 metric tons) Dual AC motors: ~2,400 hp combined Continuous drilling torque: >100,000 ft-lb (later HMH TD-1250 class published up to ~110,662 lbf·ft) Single-motor fallback: ~80% of full drilling performance if one motor is offline Typical max speed class: ~250 rpm Mud / washpipe class: 7,500 psi; IBOP class typically 15,000 psi Water course: 4 in class on later 1250-ton MH/HMH units Remote-controlled multifunctional pipe handler with 360° continuous rotation Why this unit is listed Modular Derrick Drilling Machine (MDDM) layout: major assemblies (motors, main shaft/bearing package, pipe handler) change out in hours instead of days. Workshop-type change-out claims from the original program: AC motor under ~70 minutes; main shaft on the order of ~8 hours versus multi-day jobs on older non-modular drives. Built for high annual uptime and fewer planned overhauls on deep / ultra-deep strings. Typical application Offshore and high-spec land/jack-up conversions needing 1,250-ton hook load, high continuous torque, dual-motor redundancy, and fast field maintenance. Suitable as a complete package, spare, or donor for another 1250-ton MH/HMH/Aker-family top drive. Listing notes Surplus unit offered as-is, where-is. Condition, hours, serials, remaining documentation, service loops, dolly, IBOP, cooling skid, and control cabinets to be confirmed on inspection. Photos, nameplate data, and available manuals provided on request. Buyer responsible for inspection, shipping, and any recertification to API / class / rig-specific requirements. Serious inquiries only. Specify required configuration (complete drive vs. modules), destination, and inspection window.