Single-upright-column mooring type wellhead production operation platform

A single-upright-column type wellhead production operation platform, the platform comprising:

• an upright column body of a hollow structure;
• a positioning and mounting assembly arranged at a bottom of the upright column body, the positioning and mounting assembly comprises several pile foundations and a conduit that connects the pile foundations with the upright column body;
• or the positioning and mounting assembly comprises a pile foundation column body that extends downwards along a bottom of the upright column body;
• an oil extraction operation platform arranged on the top of the upright column body, the oil extraction operation platform being provided with an oil extraction operation assembly, the oil extraction operation platform comprises a wellhead deck, and the oil extraction operation assembly comprises at least one of an oil extraction tree, a manifold terminal and a production auxiliary system;
• and
• at least one inner well slot arranged in the upright column body, the inner well slot being capable of being connected to the oil extraction operation platform;
• the oil extraction operation platform further includes a well repair deck arranged above the wellhead deck and is used to bear a well repair device.

A rotary mooring conveying system, the system comprising several rotary conveying joints,

• each of the rotary conveying joints comprising:
• an inner conveying ring;
• an outer conveying ring capable of rotating relative to the inner conveying ring,
• wherein a conveying structure capable of keeping conveying in a rotating process is arranged between the inner conveying ring and the outer conveying ring;
• and
• an inner conveying unit, the inner conveying unit being connected with the inner conveying ring;
• and
• an outer conveying unit, the outer conveying unit being connected with the outer conveying ring,
• wherein the inner conveying rings of the rotary conveying joints are fixedly connected;
• at least one rotary conveying joint is a fluid conveying joint;
• the conveying structure is an annular fluid groove formed between the inner conveying ring and the outer conveying ring, the inner conveying unit comprises a fluid pipeline, and the fluid pipeline is communicated with the annular fluid groove.