Multi-layer cement consolidated casing recovery process includes lifting, drilling, cutting and hoisting. Construction equipment includes casing lifting device, pipeline cutting tool and drilling equipment.

Casing lifting device consists of body, hydraulic power station, cable storage drum etc., with modular design structure that can achieve wireless remote control. Adopting upper and lower hydraulic clamps and hydraulic cylinder lifting, casing lifting drive is achieved and pipe segment hoist is equipped.

Pipeline cutting tool and drilling equipment are used for cutting and drilling vertical multi-layer cement casing. The equipment clamps and fixes casing at first, then performs cutting and drilling operations.