ZJ90 Drilling Rig Supporting Equipment Rig Drilling Machine ZJ90 Land Drilling Rig is a heavy‑duty modular skid‑mounted drilling unit purpose‑built for ultra‑deep on‑shore oil‑gas exploration, with nominal drilling depth reaching up to 9000 meters and maximum hook load of 6750 kN. Manufactured complying with relevant API specifications, this 3000‑HP rig supports AC‑VFD electric drive, delivering powerful torque output and precise speed regulation for high‑temperature‑high