國內外(wai)內蒙古特(te)殊(shu)扣(kou)螺(luo)紋(wen)(wen)接(jie)(jie)(jie)頭(tou)的發(fa)展現(xian)狀 1、V特(te)殊(shu)扣(kou)接(jie)(jie)(jie)頭(tou)使用以來，國內外(wai)已經開發(fa)了(le)120多(duo)種(zhong)套(tao)管、80多(duo)重有關特(te)殊(shu)螺(luo)紋(wen)(wen)接(jie)(jie)(jie)頭(tou)扣(kou)型(xing) 2、從連(lian)(lian)接(jie)(jie)(jie)方式分(fen)：接(jie)(jie)(jie)箍連(lian)(lian)接(jie)(jie)(jie)方式、無接(jie)(jie)(jie)箍（直連(lian)(lian)、整體式）連(lian)(lian)接(jie)(jie)(jie) 3、從密(mi)(mi)封(feng)(feng)(feng)結構上分(fen)：彈性密(mi)(mi)封(feng)(feng)(feng)、金(jin)屬(shu)-金(jin)屬(shu)密(mi)(mi)封(feng)(feng)(feng)、復合密(mi)(mi)封(feng)(feng)(feng)（彈性＋金(jin)屬(shu)、多(duo)級臺階密(mi)(mi)封(feng)(feng)(feng)等0） 4、從金(jin)屬(shu) 對(dui)(dui)(dui) 金(jin)屬(shu)密(mi)(mi)封(feng)(feng)(feng)接(jie)(jie)(jie)觸方式分(fen)：錐(zhui)(zhui)面(mian)(mian)(mian)(mian)-錐(zhui)(zhui)面(mian)(mian)(mian)(mian)、球(qiu)(qiu)面(mian)(mian)(mian)(mian)-錐(zhui)(zhui)面(mian)(mian)(mian)(mian)、球(qiu)(qiu)面(mian)(mian)(mian)(mian)-曲面(mian)(mian)(mian)(mian)、柱面(mian)(mian)(mian)(mian)-球(qiu)(qiu)面(mian)(mian)(mian)(mian) 5、密(mi)(mi)封(feng)(feng)(feng)級臺階結構形式密(mi)(mi)封(feng)(feng)(feng)：單點和多(duo)點：A錐(zhui)(zhui)面(mian)(mian)(mian)(mian)對(dui)(dui)(dui)錐(zhui)(zhui)面(mian)(mian)(mian)(mian)密(mi)(mi)封(feng)(feng)(feng)；B 球(qiu)(qiu)面(mian)(mian)(mian)(mian)對(dui)(dui)(dui)錐(zhui)(zhui)面(mian)(mian)(mian)(mian)密(mi)(mi)封(feng)(feng)(feng)；C球(qiu)(qiu)面(mian)(mian)(mian)(mian)對(dui)(dui)(dui)柱面(mian)(mian)(mian)(mian)密(mi)(mi)封(feng)(feng)(feng)；D球(qiu)(qiu)面(mian)(mian)(mian)(mian)對(dui)(dui)(dui)球(qiu)(qiu)面(mian)(mian)(mian)(mian)密(mi)(mi)封(feng)(feng)(feng)；E柱面(mian)(mian)(mian)(mian)對(dui)(dui)(dui)柱面(mian)(mian)(mian)(mian)密(mi)(mi)封(feng)(feng)(feng)、 Tenaris Hydril(泰(tai)納瑞斯海(hai)德爾）CS、 PH-6、511 Hunting（漢廷）TWO-STEP雙臺肩螺(luo)紋(wen)(wen)、EX直連(lian)(lian)型(xing)扣(kou)，氣密(mi)(mi)扣(kou)及各(ge)種(zhong)優質特(te)殊(shu)扣(kou)型(xing)。 天鋼扣(kou)型(xing)TP-EX、TP—CQ、TP-JC、TP—FJ（直連(lian)(lian)型(xing)）、TP-NF、TP-G2 寶鋼扣(kou)型(xing)：BGT2/3。等特(te)殊(shu)扣(kou)螺(luo)紋(wen)(wen)。