Device and method for monitoring underwater bolt fastening state

Abstract

The invention relates to a device and a method for monitoring underwater bolt fastening state. The device is characterized by comprising an air source device and a compressed air delivery device connected with an underwater pressure sensor. The device and the method are used for monitoring fastening state of bolts by monitoring change of air pressure in cavity formed between two rings of two discs penetrated with a bolt and fastened by the bolt. The device and the method for monitoring underwater bolt fastening state has the advantages that underwater bolt fastening state is monitored automatically, warning can be sent in advance, affection caused by human factors and dependence to personal quality and the like during judgment in monitoring are reduced, and labor cost is saved; the device is simple in structure has no special requirements for auxiliary instruments and equipment, fewer test devices are required, manufacturing cost is low, and the device can be mounted and used and maintained in daily life conveniently.

Description

technical field [0001] The invention belongs to the field of monitoring devices, in particular to an underwater bolt fastening state monitoring device and a monitoring method. Background technique [0002] With the rapid development of my country's offshore oil industry, more and more offshore oil and gas fields have been proven and developed. The FPSO full-sea development model with wellhead platform and single point is also increasingly used. The role of the single point mooring system in this development mode is extremely important; the single point mooring system is composed of main components such as YOKE, mooring towers, jumper hoses, and column foundations. It moors the FPSO at a designated location, allowing it to rotate around a single point under the action of wind, waves, and currents. And the bridges for well fluid, water injection and power transmission between FPSO and wellhead platform are established by hoses, submarine pipelines and cables. [0003] Takin...

AI Technical Summary

Problems solved by technology

[0005] At present, there are two possible monitoring methods: the most common is regular inspection by divers underwater, its disadvantage is high cost, and it is greatly restricted by weather and environmental conditions, and it is difficult to avoid the occurrence of unexpected events The other is to install a monitoring camera at the installation position of the bolt, and introduce the video signal into the central control room for monitoring. The disadvantage is that the clarity of the monitoring video is greatly restricted by the water quality. too dependent on personnel

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