Small righting platform for marine riser

Abstract

The invention provides a small righting platform for a marine riser. The small righting platform for the marine riser comprises a small platform body, the small platform body is fixed to a drilling platform tail plate through a bearing mechanism, and a righting device is fixedly arranged on the small platform body. According to the small righting platform for the marine riser, the small platform is collapsibly and fixedly arranged at the drilling platform tail plate, precious drilling platform space is completely prevented from being occupied, the working area of the small platform is offshore, stress borne by the righting device is effectively reduced, the righting device of a complex mechanical structure is prevented from being used, enough working space is provided by the small platform, position of the marine riser can be corrected in real time, and righting effect is better.

Description

technical field [0001] The invention belongs to the technical field of offshore drilling equipment, and in particular relates to a riser straightening small platform. Background technique [0002] In offshore drilling operations, the riser is a steel pipe connecting the subsea blowout preventer group and the floating offshore drilling device. It is mainly used to isolate seawater, guide drilling tools and casings, and form a channel for mud circulation. After the drill pipe enters the formation through the riser, if the riser is affected by the ocean load and shifts its position, thereby contacting the drill pipe, causing extrusion and friction, both the drill pipe and the riser will be greatly damaged; if the riser is worn If it is broken, serious accidents will occur, resulting in economic property losses and even casualties. [0003] In order to solve the above problems, the technicians designed the centralizing device, but most of the existing devices are concentrated o...

AI Technical Summary

Problems solved by technology

After the drill pipe enters the formation through the riser, if the riser is affected by the ocean load and shifts its position, thereby contacting the drill pipe, causing extrusion and friction, both the drill pipe and the riser will be greatly damaged; if the riser is worn If it is broken, serious accidents will occur, resulting in economic property losses and even casualties.

[0003] In order to solve the above problems, the technicians designed the centralizing device, but most of the existing devices are concentrated on the drill floor, and because they are far away from the sea surface, they need to bear greater stress, but if the volume of the centralizing device is too small, the structural bearing capacity will be low , easily damaged; if the volume of the righting device is too large, it will occupy the space of the drilling platform, and it is very inconvenient to install and disassemble

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