非滑道區(qū)域建造導(dǎo)管架的精度控制方法分析

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中圖分類號:TE54 文獻(xiàn)標(biāo)志碼:A
AnalysisofPrecision Control Methods forJacket Construction in Non-Slipway Area
ZHAO Pengzhi, SHEN Chao, DING Shixing,LIU Dongzhao, HUANG Litao(COOEC-Fluor Heavy Industries CO.,Ltd., Zhuhai , China)
Abstract: Jacket construction in non-slipway areas ofers advantages such as reduced costs and improved site utilization.This paper elaborates on key dimensional control techniques and practical experience.Pre-deformation allowances are determined throughballasting testdata analysis;adjustment measures for horizontal out-of-tolerance conditions caused bydifferential settement are summarized; welding sequences for wellhead support pipe interfaces are defined; and an optimal centerline establishment method for wellhead modules is proposed.These approaches provide references for precision control in non-slipway jacket construction.
Key Words: non-slipway area; ballasting test; differential settlement;welding sequence; piece centerline
1 引言
隨著國家加大對海洋油氣資源開發(fā)的力度,海洋油氣導(dǎo)管架建造需求日漸增加,眾所周知的是此類海洋油氣導(dǎo)管架尺寸小則百米大則數(shù)百米[1,該結(jié)構(gòu)尺寸長重量大是其顯著的特點(diǎn),因此通常是在滑道上建造,然而由于滑道資源的飽和和導(dǎo)管架訂單的增加,為拓展發(fā)展渠道并加之經(jīng)濟(jì)性的考慮,當(dāng)下行業(yè)內(nèi)正在打破固有觀念,采用非滑道場地進(jìn)行建造,由此使得非滑道導(dǎo)管架建造的尺寸控制技術(shù)顯得尤為重要,在此過程中不僅面臨著導(dǎo)管架整體不均勻沉降所帶來的水平度問題,更要考慮不均勻沉降對包括井口同心度、頭部、尾部裙裝等尺寸的嚴(yán)重干涉和影響,且在建造吊裝定位過程中,更是要考慮其現(xiàn)有的尺寸狀態(tài)和將來的變化趨勢,才能成功的將其精度把控在合理的公差范圍之內(nèi)。(剩余4274字)