Buoyant device used for blowout preventer in deepwater drilling water
A technology of deepwater drilling and buoyancy devices, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc. It can solve the problems of time-consuming installation of buoys, the ABS system cannot bear the flow rate, and water depth limitations, etc., to achieve improved stability Performance and adaptability, convenient underwater operation, and reduced installation requirements
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[0027] The present invention will be described in detail below with reference to the drawings and embodiments.
[0028] As shown in Figures 1 and 2, the present invention includes a blowout preventer 1 that is set 80-100 meters below the water surface, a buoyancy cabin 2 connected to the top of the blowout preventer 1 as an upper float, and the other is connected to the blowout preventer 1. The bottom of the ballast tank 3 is used as a lower pontoon, a high-pressure riser 4 connected to the bottom of the ballast tank 3 and a buoyancy block 5 arranged outside the high-pressure riser 4. The buoyancy tank 2 and ballast tank 3 as the upper and lower pontoons can effectively reduce the center of gravity of the blowout preventer 1 in the entire drilling device, thereby improving the stability and adaptability of the entire drilling device, and expanding the operating window of the drilling system At the same time, it can achieve the purpose of reducing the size of the entire buoyancy sy...
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