The BYJ18-21/35-S water well pressurized operation device belongs to a lightweight hydraulic assisted pressurized operation device, which includes a power part and a wellhead operation part. The power part is a pry mounted structure, mainly including a diesel engine and a coupling pump device, a hydraulic oil tank, a hydraulic oil pump, a hydraulic control system, an accumulator system, etc; The wellhead operation includes three gate preventers (including coupling detectors), annular preventers, pipe clamps and universal slips, lifting hydraulic cylinders, work platforms and driller control consoles, as well as auxiliary components such as escalator oil pipe ramps; The power part is designed as a sled and box type structure, and the wellhead operation part includes a combination of a blowout preventer and an operation platform. The platform has a layered structure and is integrated with the blowout preventer.
