1. 制定標準的意義(yi)
本標(biao)準(zhun)為首次制定，主編單位為寶雞石(shi)油(you)鋼(gang)管(guan)有(you)限(xian)責(ze)任公(gong)司。
連(lian)續(xu)油(you)管(guan)(guan)(guan)（Coiled Tubing，CT）也稱撓性(xing)管(guan)(guan)(guan)、蛇形管(guan)(guan)(guan)或(huo)盤(pan)管(guan)(guan)(guan)，是(shi)一種強度(du)高、塑性(xing)好的高附加值綠色產(chan)(chan)(chan)品(pin)，單根長(chang)度(du)已(yi)超過7000m，在生(sheng)產(chan)(chan)(chan)線連(lian)續(xu)生(sheng)產(chan)(chan)(chan)并按一定長(chang)度(du)纏繞在卷(juan)筒(tong)上交付使用(yong)，作業(ye)時卷(juan)筒(tong)上的管(guan)(guan)(guan)子可反復收放、使用(yong)。由于連(lian)續(xu)油(you)管(guan)(guan)(guan)作業(ye)具(ju)有占地面積小(xiao)、效率高、拆裝方便、保護油(you)層、增加產(chan)(chan)(chan)量(liang)、安全(quan)環保和(he)使用(yong)范圍廣(guang)等諸多普(pu)通油(you)管(guan)(guan)(guan)不(bu)可比擬(ni)的優點，已(yi)廣(guang)泛應用(yong)于油(you)氣井修井、完井、測井、增注、老井重鉆、加深、側鉆、小(xiao)井眼、欠(qian)平衡(heng)、過平衡(heng)、水平井鉆井以及(ji)常規(gui)管(guan)(guan)(guan)道集輸和(he)生(sheng)產(chan)(chan)(chan)油(you)管(guan)(guan)(guan)等多種作業(ye)。因此連(lian)續(xu)油(you)管(guan)(guan)(guan)及(ji)其作業(ye)技術在國際上得到了(le)快速發展。
長(chang)期以來，連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)材(cai)料和(he)產(chan)(chan)(chan)品制(zhi)造技術(shu)(shu)一(yi)直被美國(guo)壟(long)斷，進口周(zhou)期長(chang)、價格高(gao)，嚴重阻礙了(le)我國(guo)連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)作業(ye)技術(shu)(shu)應(ying)用(yong)和(he)發(fa)展。為(wei)滿足石油(you)(you)工(gong)業(ye)發(fa)展的需要(yao)，2006年寶雞鋼管(guan)(guan)(guan)牽頭承擔的連(lian)(lian)續(xu)管(guan)(guan)(guan)項(xiang)目列入國(guo)家(jia)“863”計劃和(he)中國(guo)石油(you)(you)天然(ran)氣集團公司(si)重大科技專項(xiang)，2009年打(da)破國(guo)外封鎖(suo)壟(long)斷，成(cheng)功使我國(guo)成(cheng)為(wei)全世(shi)界(jie)第(di)二個掌握連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)生產(chan)(chan)(chan)技術(shu)(shu)的國(guo)家(jia)，全面(mian)實(shi)現(xian)連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)國(guo)產(chan)(chan)(chan)化。本標(biao)(biao)準(zhun)(zhun)制(zhi)定前，我國(guo)沒有(you)連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)國(guo)家(jia)標(biao)(biao)準(zhun)(zhun)，而標(biao)(biao)準(zhun)(zhun)對高(gao)新(xin)技術(shu)(shu)產(chan)(chan)(chan)品的研發(fa)和(he)推廣(guang)應(ying)用(yong)具(ju)有(you)重要(yao)作用(yong)。本標(biao)(biao)準(zhun)(zhun)有(you)利(li)于推廣(guang)應(ying)用(yong)連(lian)(lian)續(xu)油(you)(you)管(guan)(guan)(guan)產(chan)(chan)(chan)品及(ji)相關(guan)作業(ye)技術(shu)(shu)。
2. 主要技術(shu)內容(rong)
連(lian)續(xu)(xu)油管(guan)(guan)(guan)(guan)外徑(jing)(jing)尺寸(cun)范(fan)圍為19.1～88.9mm；連(lian)續(xu)(xu)油管(guan)(guan)(guan)(guan)盡可(ke)能少的(de)鋼(gang)管(guan)(guan)(guan)(guan)對(dui)接環焊(han)(han)縫，單個對(dui)接鋼(gang)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)段(duan)(duan)(duan)的(de)長度(du)(du)(du)應(ying)(ying)不(bu)(bu)小(xiao)小(xiao)于61m。鋼(gang)應(ying)(ying)采用(yong)(yong)(yong)(yong)細化(hua)晶粒(li)(li)工藝(yi)制(zhi)造(zao)，可(ke)適當加(jia)入合金(jin)(jin)或(huo)微合金(jin)(jin)元素，采用(yong)(yong)(yong)(yong)全流(liu)程潔(jie)凈(jing)化(hua)、均質化(hua)煉鋼(gang)；鋼(gang)級為CT55、CT60、CT70、CT80、CT90、CT100、CT110等7個鋼(gang)級。鋼(gang)管(guan)(guan)(guan)(guan)采用(yong)(yong)(yong)(yong)高頻(pin)感應(ying)(ying)焊(han)(han)（HFI）或(huo)激光焊(han)(han)工藝(yi)進行(xing)(xing)連(lian)續(xu)(xu)縱向(xiang)焊(han)(han)縫焊(han)(han)接，不(bu)(bu)接受沒(mei)有進行(xing)(xing)適當熱處理的(de)冷(leng)拔管(guan)(guan)(guan)(guan)。變徑(jing)(jing)管(guan)(guan)(guan)(guan)柱可(ke)采用(yong)(yong)(yong)(yong)對(dui)焊(han)(han)工藝(yi)將(jiang)兩(liang)(liang)種或(huo)兩(liang)(liang)種以(yi)上壁(bi)厚(hou)的(de)鋼(gang)帶(dai)對(dui)接后生(sheng)產(chan)，或(huo)采用(yong)(yong)(yong)(yong)對(dui)焊(han)(han)工藝(yi)將(jiang)兩(liang)(liang)種或(huo)兩(liang)(liang)種以(yi)上壁(bi)厚(hou)的(de)鋼(gang)帶(dai)與一條(tiao)或(huo)多(duo)條(tiao)壁(bi)厚(hou)連(lian)續(xu)(xu)變化(hua)的(de)鋼(gang)帶(dai)對(dui)接后生(sheng)產(chan)；或(huo)采用(yong)(yong)(yong)(yong)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)對(dui)焊(han)(han)工藝(yi)將(jiang)連(lian)續(xu)(xu)生(sheng)產(chan)的(de)單一壁(bi)厚(hou)管(guan)(guan)(guan)(guan)段(duan)(duan)(duan)連(lian)接到(dao)壁(bi)厚(hou)漸(jian)增／漸(jian)減(jian)的(de)其他管(guan)(guan)(guan)(guan)段(duan)(duan)(duan)上。拉伸(shen)(shen)力(li)學(xue)性能要求(qiu)(qiu)(qiu)包(bao)括：規(gui)定(ding)總延伸(shen)(shen)強(qiang)度(du)(du)(du)或(huo)規(gui)定(ding)殘(can)余延伸(shen)(shen)強(qiang)度(du)(du)(du)R10.5或(huo)R,0.2（要求(qiu)(qiu)(qiu)最(zui)(zui)小(xiao)值和(he)最(zui)(zui)大值），抗拉強(qiang)度(du)(du)(du)（要求(qiu)(qiu)(qiu)最(zui)(zui)小(xiao)值），原始標(biao)距(ju)為50mm試樣的(de)最(zui)(zui)小(xiao)斷后伸(shen)(shen)長率。硬(ying)度(du)(du)(du)要求(qiu)(qiu)(qiu)包(bao)括管(guan)(guan)(guan)(guan)體(ti)(ti)和(he)焊(han)(han)縫洛(luo)氏硬(ying)度(du)(du)(du)（HRC）。晶粒(li)(li)度(du)(du)(du)應(ying)(ying)為8級或(huo)更(geng)細。工藝(yi)性能包(bao)括壓扁和(he)擴口。每個單根鋼(gang)管(guan)(guan)(guan)(guan)的(de)兩(liang)(liang)端焊(han)(han)縫橫(heng)截面金(jin)(jin)相檢驗，觀(guan)察母材金(jin)(jin)屬和(he)焊(han)(han)縫區域的(de)微觀(guan)組(zu)織。其他檢驗要求(qiu)(qiu)(qiu)包(bao)括靜水壓試驗、通徑(jing)(jing)（球(qiu)規(gui)）試驗、無損(sun)檢測等。連(lian)續(xu)(xu)油管(guan)(guan)(guan)(guan)柱包(bao)裝前(qian)應(ying)(ying)涂敷外保護(hu)膜。經購方和(he)制(zhi)造(zao)商協商，應(ying)(ying)在連(lian)續(xu)(xu)油管(guan)(guan)(guan)(guan)內(nei)充滿干燥的(de)不(bu)(bu)反應(ying)(ying)氣(qi)體(ti)(ti)，并密封端口。
3. 國內外(wai)標準(zhun)對比及(ji)標準(zhun)水平
和美國(guo)石油(you)學會《油(you)氣井用(yong)連(lian)續(xu)管(guan)作業推薦作法》（API RP5C7）、《連(lian)續(xu)油(you)管(guan)規范》（API Spec 5ST）相比(bi)，本(ben)標(biao)準涉及全部指標(biao)與國(guo)外(wai)先(xian)(xian)進(jin)標(biao)準水(shui)平相當，部分指標(biao)水(shui)平高于國(guo)外(wai)同類標(biao)準要求，本(ben)標(biao)準水(shui)平為國(guo)際(ji)先(xian)(xian)進(jin)水(shui)平。
