文章來源：中(zhong)國煤炭地質(zhi)總局 發布時(shi)間：2010-03-02
近日，中國煤炭地質總局負責的“延煉——西安”成品油管輸工程渭河定向鉆穿越項目正式開工。該項目穿越管線為雙線設計，主線為直徑377毫米和114毫米的光纜管線，輔線為并行的355毫米輸油管線，設計穿越長度1626米，要穿越1300多米的中粗砂層，穿越深度達60余米，其中水下穿越工程達30米深，在國內同行業中屬于超長、超深、高難的穿越工程。
渭河定(ding)向(xiang)鉆穿越(yue)工(gong)(gong)(gong)(gong)程是延(yan)長集團由延(yan)安煉油(you)廠向(xiang)西安油(you)庫輸送(song)成品油(you)的(de)咽喉工(gong)(gong)(gong)(gong)程，要求在50天工(gong)(gong)(gong)(gong)期內高質量地完(wan)成。中國煤炭(tan)地質總局(ju)技術施(shi)工(gong)(gong)(gong)(gong)人員精心編(bian)制(zhi)了施(shi)工(gong)(gong)(gong)(gong)設計方案，制(zhi)定(ding)了水體(ti)下定(ding)向(xiang)鉆進和管線回拖等各(ge)關鍵階(jie)段(duan)的(de)特殊施(shi)工(gong)(gong)(gong)(gong)技術方案以及應急預案，選(xuan)用回拖力達2800噸的(de)GD—2800L水平定(ding)向(xiang)鉆機(ji)開始施(shi)工(gong)(gong)(gong)(gong)。