COUPLING FRAME FOR LONGITUDINAL MOVEMENT OF THE REPLACEABLE TOOL TO THE TERMINAL BUSHINGS OF PIPELINES WHEN CONNECTING PIPELINES Russian patent published in 2022 - IPC E21B43/13 F16L1/26 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, namely to methods for underwater connection of pipelines, and can be used during operations to clean the terminal bushings of the equipment connection system and install a metal seal using replaceable products. The coupling frame for the longitudinal movement of the replaceable tool to the terminal bushings of pipelines when connecting pipelines consists of a receiving frame, a structure with guides. A hydraulic connector for connection to a remote-controlled uninhabited underwater vehicle and a hydraulic system are fixed on the structure. The hydraulic system contains two parallel connected hydraulic cylinders mounted on guides. Each of the hydraulic cylinders contains two main hydraulic connectors in the end positions and two additional hydraulic connectors: one in the middle and one in the end position. Each of the hydraulic cylinders is connected in series through the main and additional hydraulic connectors with two hydraulic locks, each of which, in turn, is connected by hydraulic lines with two flow dividers installed in series behind them.

EFFECT: partial automation of the working cycle of the device is provided and the work of the operator of remote-controlled uninhabited underwater vehicles for the replacement of replaceable tools is facilitated.

1 cl, 12 dwg