1. 制(zhi)定(ding)標準的意義
本標(biao)準為首次(ci)制定，主編(bian)單位為寶雞石油鋼管有限責(ze)任公司。
連(lian)續(xu)油(you)管(guan)(guan)(guan)(guan)（Coiled Tubing，CT）也稱撓性管(guan)(guan)(guan)(guan)、蛇形管(guan)(guan)(guan)(guan)或盤(pan)管(guan)(guan)(guan)(guan)，是一種強度高(gao)(gao)、塑(su)性好的高(gao)(gao)附加值綠色產品，單根(gen)長(chang)度已(yi)超過7000m，在生(sheng)產線連(lian)續(xu)生(sheng)產并按一定長(chang)度纏繞在卷筒上交付使(shi)用(yong)，作業(ye)時卷筒上的管(guan)(guan)(guan)(guan)子可反復收放、使(shi)用(yong)。由(you)于連(lian)續(xu)油(you)管(guan)(guan)(guan)(guan)作業(ye)具有占地面積(ji)小、效率(lv)高(gao)(gao)、拆裝方(fang)便(bian)、保護(hu)油(you)層、增(zeng)加產量、安全環保和使(shi)用(yong)范圍廣等諸多(duo)普通油(you)管(guan)(guan)(guan)(guan)不可比擬的優(you)點，已(yi)廣泛應用(yong)于油(you)氣井(jing)修井(jing)、完井(jing)、測(ce)井(jing)、增(zeng)注、老井(jing)重鉆(zhan)、加深(shen)、側鉆(zhan)、小井(jing)眼(yan)、欠(qian)平(ping)衡(heng)(heng)、過平(ping)衡(heng)(heng)、水平(ping)井(jing)鉆(zhan)井(jing)以及(ji)常規管(guan)(guan)(guan)(guan)道集輸和生(sheng)產油(you)管(guan)(guan)(guan)(guan)等多(duo)種作業(ye)。因(yin)此連(lian)續(xu)油(you)管(guan)(guan)(guan)(guan)及(ji)其(qi)作業(ye)技術(shu)在國際(ji)上得到了快(kuai)速發展。
長(chang)期(qi)以(yi)來，連(lian)(lian)(lian)續油(you)(you)管材料(liao)和產(chan)(chan)(chan)品(pin)(pin)制造技(ji)(ji)術一直被美國(guo)(guo)(guo)壟(long)斷(duan)，進口周期(qi)長(chang)、價格高，嚴(yan)重(zhong)阻礙了我(wo)國(guo)(guo)(guo)連(lian)(lian)(lian)續油(you)(you)管作(zuo)業技(ji)(ji)術應(ying)用(yong)和發(fa)展(zhan)。為滿足石(shi)油(you)(you)工業發(fa)展(zhan)的需(xu)要，2006年寶雞鋼(gang)管牽頭(tou)承擔的連(lian)(lian)(lian)續管項目列入國(guo)(guo)(guo)家“863”計劃和中國(guo)(guo)(guo)石(shi)油(you)(you)天然氣(qi)集團(tuan)公司重(zhong)大科(ke)技(ji)(ji)專項，2009年打破(po)國(guo)(guo)(guo)外封(feng)鎖(suo)壟(long)斷(duan)，成(cheng)功(gong)使我(wo)國(guo)(guo)(guo)成(cheng)為全世界第二(er)個掌握(wo)連(lian)(lian)(lian)續油(you)(you)管生產(chan)(chan)(chan)技(ji)(ji)術的國(guo)(guo)(guo)家，全面實現連(lian)(lian)(lian)續油(you)(you)管國(guo)(guo)(guo)產(chan)(chan)(chan)化。本標(biao)(biao)準制定前，我(wo)國(guo)(guo)(guo)沒有(you)連(lian)(lian)(lian)續油(you)(you)管國(guo)(guo)(guo)家標(biao)(biao)準，而(er)標(biao)(biao)準對高新技(ji)(ji)術產(chan)(chan)(chan)品(pin)(pin)的研發(fa)和推(tui)廣(guang)應(ying)用(yong)具有(you)重(zhong)要作(zuo)用(yong)。本標(biao)(biao)準有(you)利于推(tui)廣(guang)應(ying)用(yong)連(lian)(lian)(lian)續油(you)(you)管產(chan)(chan)(chan)品(pin)(pin)及相關作(zuo)業技(ji)(ji)術。
2. 主要技術內(nei)容
連(lian)(lian)(lian)(lian)續(xu)(xu)油(you)(you)管(guan)(guan)(guan)(guan)外徑尺寸范圍為(wei)19.1～88.9mm；連(lian)(lian)(lian)(lian)續(xu)(xu)油(you)(you)管(guan)(guan)(guan)(guan)盡可能少的(de)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)對(dui)(dui)接環焊(han)(han)(han)(han)縫(feng)，單個(ge)對(dui)(dui)接鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)段(duan)(duan)的(de)長度(du)(du)應(ying)不小(xiao)小(xiao)于61m。鋼(gang)(gang)(gang)應(ying)采用細(xi)化(hua)晶(jing)(jing)粒工藝制造(zao)，可適(shi)當加入(ru)合金(jin)(jin)或微合金(jin)(jin)元素，采用全流程(cheng)潔凈化(hua)、均(jun)質化(hua)煉鋼(gang)(gang)(gang)；鋼(gang)(gang)(gang)級(ji)為(wei)CT55、CT60、CT70、CT80、CT90、CT100、CT110等(deng)7個(ge)鋼(gang)(gang)(gang)級(ji)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)采用高(gao)頻(pin)感應(ying)焊(han)(han)(han)(han)（HFI）或激光焊(han)(han)(han)(han)工藝進行連(lian)(lian)(lian)(lian)續(xu)(xu)縱向焊(han)(han)(han)(han)縫(feng)焊(han)(han)(han)(han)接，不接受沒(mei)有進行適(shi)當熱處理(li)的(de)冷拔(ba)管(guan)(guan)(guan)(guan)。變(bian)徑管(guan)(guan)(guan)(guan)柱(zhu)可采用對(dui)(dui)焊(han)(han)(han)(han)工藝將(jiang)(jiang)兩(liang)(liang)種(zhong)(zhong)(zhong)或兩(liang)(liang)種(zhong)(zhong)(zhong)以上(shang)壁(bi)厚(hou)(hou)(hou)(hou)的(de)鋼(gang)(gang)(gang)帶(dai)對(dui)(dui)接后生(sheng)(sheng)產(chan)，或采用對(dui)(dui)焊(han)(han)(han)(han)工藝將(jiang)(jiang)兩(liang)(liang)種(zhong)(zhong)(zhong)或兩(liang)(liang)種(zhong)(zhong)(zhong)以上(shang)壁(bi)厚(hou)(hou)(hou)(hou)的(de)鋼(gang)(gang)(gang)帶(dai)與一(yi)條或多條壁(bi)厚(hou)(hou)(hou)(hou)連(lian)(lian)(lian)(lian)續(xu)(xu)變(bian)化(hua)的(de)鋼(gang)(gang)(gang)帶(dai)對(dui)(dui)接后生(sheng)(sheng)產(chan)；或采用管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)對(dui)(dui)焊(han)(han)(han)(han)工藝將(jiang)(jiang)連(lian)(lian)(lian)(lian)續(xu)(xu)生(sheng)(sheng)產(chan)的(de)單一(yi)壁(bi)厚(hou)(hou)(hou)(hou)管(guan)(guan)(guan)(guan)段(duan)(duan)連(lian)(lian)(lian)(lian)接到壁(bi)厚(hou)(hou)(hou)(hou)漸增／漸減的(de)其(qi)他管(guan)(guan)(guan)(guan)段(duan)(duan)上(shang)。拉伸(shen)(shen)力學(xue)性(xing)能要(yao)(yao)求(qiu)包(bao)括：規(gui)(gui)定總延伸(shen)(shen)強(qiang)度(du)(du)或規(gui)(gui)定殘余延伸(shen)(shen)強(qiang)度(du)(du)R10.5或R,0.2（要(yao)(yao)求(qiu)最小(xiao)值和(he)最大值），抗拉強(qiang)度(du)(du)（要(yao)(yao)求(qiu)最小(xiao)值），原始標距為(wei)50mm試(shi)樣(yang)的(de)最小(xiao)斷后伸(shen)(shen)長率。硬度(du)(du)要(yao)(yao)求(qiu)包(bao)括管(guan)(guan)(guan)(guan)體和(he)焊(han)(han)(han)(han)縫(feng)洛氏硬度(du)(du)（HRC）。晶(jing)(jing)粒度(du)(du)應(ying)為(wei)8級(ji)或更細(xi)。工藝性(xing)能包(bao)括壓扁和(he)擴(kuo)口。每個(ge)單根鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)兩(liang)(liang)端焊(han)(han)(han)(han)縫(feng)橫截面金(jin)(jin)相(xiang)檢(jian)驗(yan)(yan)，觀察母(mu)材金(jin)(jin)屬和(he)焊(han)(han)(han)(han)縫(feng)區域的(de)微觀組織(zhi)。其(qi)他檢(jian)驗(yan)(yan)要(yao)(yao)求(qiu)包(bao)括靜水壓試(shi)驗(yan)(yan)、通徑（球規(gui)(gui)）試(shi)驗(yan)(yan)、無損檢(jian)測等(deng)。連(lian)(lian)(lian)(lian)續(xu)(xu)油(you)(you)管(guan)(guan)(guan)(guan)柱(zhu)包(bao)裝前應(ying)涂敷外保護膜。經購方和(he)制造(zao)商協商，應(ying)在(zai)連(lian)(lian)(lian)(lian)續(xu)(xu)油(you)(you)管(guan)(guan)(guan)(guan)內充滿干燥的(de)不反應(ying)氣體，并密封端口。
3. 國內外標準對比(bi)及標準水平
和美(mei)國石油(you)學會《油(you)氣井用連(lian)續(xu)管作業推薦作法》（API RP5C7）、《連(lian)續(xu)油(you)管規范》（API Spec 5ST）相比，本(ben)標(biao)(biao)準(zhun)(zhun)涉及全(quan)部指(zhi)標(biao)(biao)與國外先進標(biao)(biao)準(zhun)(zhun)水平(ping)相當，部分指(zhi)標(biao)(biao)水平(ping)高(gao)于國外同類標(biao)(biao)準(zhun)(zhun)要求，本(ben)標(biao)(biao)準(zhun)(zhun)水平(ping)為國際先進水平(ping)。
