Underwater-wellhead feeding tool assembly and use method thereof

An underwater-wellhead feeding tool assembly, comprising a fix component, a drive system, and a transmission system;

• wherein the fix component comprises a pressure-bearing cylinder, and a drive cylinder and an underwater-wellhead feeding tool that are disposed within the pressure-bearing cylinder;
• wherein a transmission mechanism is connected between the drive cylinder and the underwater-wellhead feeding tool;
• a side wall of the pressure-bearing cylinder is provided with a first port and a second port, and a bottom of the pressure-bearing cylinder is provided with a third port;
• the drive system comprises a controller, a drive device, a first pipeline, and a second pipeline;
• the drive device is connected to the underwater-wellhead feeding tool, one end of the first pipeline and one end of the second pipeline are in signal connection with the controller, respectively;
• the other end of the first pipeline is connected to the first port, the other end of the second pipeline comprises a first branch line, a second branch line, and a third branch line;
• the first branch line is connected to the second port, the second branch line is connected to the underwater-wellhead feeding tool, and the third branch line is connected to the drive device;
• the transmission system comprises a sensing component, a test lead, and a data acquisition device;
• the sensing component is provided inside the drive cylinder;
• one end of the test lead is connected to the sensing component, and the other end of the test lead passes through the third port and is connected to the data acquisition device;
• the controller adds pressure to an inside of the drive cylinder through the first pipeline via the first port, and adds pressure to a cavity space between the pressure-bearing cylinder and the drive cylinder through the first branch line, so as to simulate an underwater pressure environment for the underwater-wellhead feeding tool;
• the controller controls, through the third branch line, the drive device to transmit a torque to the underwater-wellhead feeding tool, and transmits, through the second branch line, an axial force to the underwater-wellhead tool, so as to simulate a force bearing situation of a process of connecting the underwater-wellhead feeding tool to an underwater wellhead, and locking the underwater-wellhead feeding tool to the underwater wellhead by a linear movement of the underwater-wellhead feeding tool relative to the drive cylinder by means of the transmission mechanism, and then the sensing component transmits a detected stress signal and/or strain signal to the data acquisition device through the test lead.