
Surface subsidence caused by hydrate decomposition during drilling
Figures of the Article
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Schematic diagram of distribution of gas hydrate formations
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Schematic diagram of capacity loss during jetting through hydrate formations
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Surface subsidence caused by hydrate decomposition during drilling
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Test device for drilling and production of hydrate
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Hydrate drilling simulation system
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Decrease of ultimate bearing capacity of hydrate formation during drilling
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Bearing capacities of 914.4 mm-conductor in South China Sea
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Bearing capacities of wellhead of suction piles with different diameters
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Design results of standing up time of surface conductor
Tables of the Article
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顶部深度/m 底部深度/m 土体性质 重度
/(kN·m-3)抗剪强度/kPa 顶部 底部 0.00 3.20 黏土 17.0 10 10 3.30 5.90 黏土 17.0 10 25 5.90 13.00 黏土 17.5 30 40 13.00 23.00 黏土 17.5 40 50 23.00 31.80 黏土 17.5 50 80 31.80 58.00 水合物 18.4 — — 58.00 69.60 黏土 18.5 125 130 69.60 75.80 黏土 19.0 125 130 75.80 82.40 黏土 19.0 140 210 82.40 128.00 黏土 19.5 260 350 -
低压井口头 重量/kN 浮重/kN 防沉板 38.50 33.50 CADA 23.13 20.12 36in表层导管 5.46L~131.04 4.74L~114.00 注:表层导管重量中的L为表层导管入泥深度(m)。