CN1201062C - 连接两管子的整体接头 - Google Patents
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- CN1201062C CN1201062C CNB00102261XA CN00102261A CN1201062C CN 1201062 C CN1201062 C CN 1201062C CN B00102261X A CNB00102261X A CN B00102261XA CN 00102261 A CN00102261 A CN 00102261A CN 1201062 C CN1201062 C CN 1201062C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/002—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with more then one threaded section
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
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Abstract
两根管子的整体接头,包括:一个第一母元件,在第一管子的一端设置了两级内螺纹;还有一个第二公元件,在第二管子的一端设置了两级外螺纹;以及在两端的金属对金属密封,至少分别在接头的一端和中心设置了两个台肩。
Description
技术领域
本发明涉及一种两个管子的整体接头。
具体地说,本发明涉及一种用作钻孔套管的管子的整体式接头***。
在说明书和权利要求书中使用的术语“套管”,指一种管状结构,由通过一个机械接头装配在一起的管子的各部分组成,其安装在用于生产油气的钻井内,作为钻井自身的壁的加固和支撑件。
背景技术
众所周知,石油工业趋向于减小生产钻井的直径,从而降低钻孔的成本。然而为达到这种效果,连接管子各部分获得套管的连接必须具有基本上与管子本身完全相同的几何形状,即,具有相同的内径和外径。
整体式连接或接头,例如,外平接头和接近外平的接头(near-flushjoint),已用于所述目的,其外径与将要装配的管子的外径相等(外平接头)或直径比将要装配的管子的外径稍微大点(2-3.5%)(接近外平的接头)。
然而,这些接头的缺点是其机械连接性能,例如,伸长,压缩,扭转,和弯曲强度比管子自身的对应性能低得多。特别地,外平接头或接近外平的接头的拉伸强度相对于管子主体,根据管子直径和厚度,在65%到75%的范围内变化。通常作为管子参数的压缩、弯曲和抗扭强度甚至更低。
这些机械性能的降低限制了这些连接/接头应用于一定深度的钻井,这种钻井具有不同的压力,并且当管子***钻孔内时,不要求旋转(例如在尾套管表面硬化(Liner cementation)的情况下要求这样)。
上述类型的整体式的接近外平接头包含适合提高机械性能的改进,并且在以克服这些缺点为目的的文献中已提到过。例如,已公开的国际专利申请WO.93/18329描述了一种整体接头,在装配的管子的每一端上机加工,其由两个元件,公元件和母元件构成。每个元件至少包含两个螺纹段,所述螺纹段通过一个当装配管子时适合于彼此配合的连接台肩彼此分开。
已公开的欧洲专利申请767,335描述了一个用于管子的整体接头,在要装配的管子的每一端机加工;所述接头由两个螺纹元件,公元件和母元件构成;并有一个圆锥形纵向部分。螺纹在中间位置通过与管子轴线正交的台肩中断。
为提高接头的密封效果,通过机械加工去除了公元件的螺纹的初始部分和母元件的螺纹的末端部分,当连接时,两个表面彼此接触,结果所述表面弹性变形。
上述的连接,尽管提高了外平类型接头的机械性能,但是,仍不能完全保证适合于深井。
发明内容
因此本申请人发明了一种接近外平的整体接头,其特征在于在压缩和抗扭强度方面有显著改进。这种改进通过接头的公元件和母元件的端部的独特设计得以实现,如下文所述,可以对至少两台肩(外边和中间的)机加工,从而将压缩强度增加到接近拉伸和抗扭强度的水平,它的最大值大约是接头设计扭矩的2.5倍。
另外,两金属密封(内部的和外部的)及台肩和特定的两级螺纹轮廓的存在,允许连接/接头对综合载荷有良好的抗力,使它在钻井里可以承受极端的加压,拉伸,压缩,弯曲和扭转应力,使连接本身非常适合于倾斜的或水平的、高压和高温钻井。
本发明的目的涉及一种用于连接两管子的整体接头,包括:
a)一个有圆锥形纵向部分的第一母元件,该部分在第一管子的一端加工出了两级内螺纹;
b)一个第二公元件,在第二管子的一端加工了两级外螺纹,并有一个圆锥形纵向部分适合于配合在母元件内;
c)一个台肩,与管子轴线正交,其位于公元件上沿着螺纹的一半距离处;
d)一个台肩,与管子轴线正交,位于沿着母元件螺纹的一半距离处,用于连接时与公元件的台肩相配合;
e)分别在母元件的起始部分和末端部分加工出的两个***部,用于与在公元件的起始部分和末端部分加工出的扩张部过盈配合;
其特征在于:
f)在公元件的扩张部和螺纹的起始端之间,有一个环形狭槽,其深度(允许螺纹加工)由相应的台肩复原,所述台肩的厚度与在螺纹末端的上述狭槽的深度基本相等;
g)在母元件的初始***部和相应螺纹的起始端之间,有另外一个环形狭槽,与第一个类似,其深度(允许加工螺纹)由可能的对应台肩复原,或者隐没在螺纹末端的***部中。
根据本发明,能获得一个整体接头,其具有至少两台肩,所述台肩的外径比与接头本身的外径稍微增加一点(2-3%),所述接头的几何形状与相连接管子的几何形状相同。事实上,狭槽的长度范围为1到2cm和高度范围为2-4mm,由于两个狭槽的存在,根据管子的直径和厚度,螺纹从低厚度的管子部分开始;这样,在螺纹末端,狭槽自身的深度可通过台肩复原。以此种方式,在接头的末端至少可以获得一个额外的台肩,不需要增加要连接的管子的末端部分的厚度。
附图说明
本发明两管子的整体接头的目的可通过标着数字的附图更容易理解,所述附图表示本发明不受限制的实施例,其中:
图1和2分别表示在未连接/连接位置,带三个台肩的接头的公元件和母元件沿着X-X轴的半个纵向截面;
图5和6分别表示在未连接/连接位置,一个带两个台肩的接头的公元件和母元件沿着X-X轴的半个纵向截面;
图4和7分别表示一个带公元件和母元件的接头的整个截面。特别地,该图表示了有台肩/金属密封的三个细节4A,4B,4C和7A,7B,7C的接头的纵向截面。图4表示带三个台肩设计(一个里面,一个中间,一个外面)的接头;图7表示只带两个台肩(一个外面和一个里面)的接头。
图3表示沿着X-X轴,螺纹轮廓的部分视图,从中可以看出优选的设计包括一个负的装载角和一个正的入口角。
具体实施方式
参照附图,标号1表示母管子3的中空末端部,在该端部设有内螺纹2,而标号4表示公管子5的相应中空末端部,在该端部设有外螺纹6。
管子的公元件和母元件有一个圆锥形的纵向部分,根据管的直径和厚度,圆锥区域在8%到16%的范围内变化。
对应于螺纹2和6的一半,有一个与管子的轴线正交的台肩7,如图4B所示。本发明整体式接头的端部分别在图4A/7A和4C/7C中表示。
在本发明接头的公元件的端部具有外扩张部8和9,与在母元件端部机加工的内***部10和11过盈配合,形成两个金属对金属的内、外密封,这样保证在任何操作状态下,接头的完全密封。在公元件的初始扩张部8和螺纹6的开始端之间,有一个狭槽12,其深度通过与外扩张部9正交的台肩13在螺纹的末端复原。在母元件初始***部11和螺纹2的开始端之间有一个狭槽14,其深度通过与***部10基本正交的台肩15在螺纹的末端复原(见图4C)。在可选择的解决办法中,不存在这种台肩(图7),其已经消失在了***部10中。
为了单纯的描述目的,根据本发明的接头的机械特性,如以前在图1,2,和图4中所述,将在下文描述;相应管子的直径为195.58mm,厚度为15.11mm。里面和外面的台肩的高度大约为2mm,中间台肩的高度大约为1.5mm。
三个台肩的总面积大约3500mm2,管子主体的横截面积大约为8600mm2,接头的横截面积大约为6900mm2。这样接头的拉伸率大约等于管子主体屈服强度的80%(拉伸率%=6900/8600×100=80%)。
考虑到三个台肩的面积,压缩率是拉伸率的50%(压缩率%=3500/6900×100=50%)。考虑到螺纹的作用(估计大约30%),因此可以说,接头的压缩率与拉伸率相等(大约80%)。
Claims (1)
1.用于连接两根管子的一整体接头,包括:
a)一个带有圆锥形纵向部分的第一母元件,它在第一管子的一端加工有两级内螺纹;
b)一个带有圆锥形纵向部分的第二公元件,它在第二管子的一端加工有两级外螺纹,用于配合在母元件内;
c)一个台肩,与管子轴线正交,并且在沿着螺纹的一半距离处位于公元件上面;
d)一个台肩,与管子轴线正交,位于沿着母元件的螺纹的一半距离处,用于连接时与公元件的台肩相配合;
e)分别在母元件的起始部分和末端部分加工出的两个***部,用于与在公元件的起始部分和末端部分加工出的相应扩张部过盈配合;
其特征在于:
f)在公元件的扩张部和螺纹的开始端之间,有一个环形狭槽,其深度由在螺纹末端、厚度与所述狭槽的深度相等的相应台肩复原;
g)在母元件的初始***部和相应螺纹的开始端之间,有另一环形狭槽,其深度由螺纹末端的相应台肩复原或隐没在螺纹末端的***部内。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000336A/1999 | 1999-02-19 | ||
IT1999MI000336A IT1309704B1 (it) | 1999-02-19 | 1999-02-19 | Giunzione integrale di due tubazioni |
IT000336A/99 | 1999-02-19 |
Publications (2)
Publication Number | Publication Date |
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CN1265445A CN1265445A (zh) | 2000-09-06 |
CN1201062C true CN1201062C (zh) | 2005-05-11 |
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Application Number | Title | Priority Date | Filing Date |
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CNB00102261XA Expired - Fee Related CN1201062C (zh) | 1999-02-19 | 2000-02-18 | 连接两管子的整体接头 |
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Country | Link |
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US (1) | US6347814B1 (zh) |
EP (1) | EP1030029B1 (zh) |
JP (1) | JP4498519B2 (zh) |
CN (1) | CN1201062C (zh) |
AR (1) | AR022617A1 (zh) |
AT (1) | ATE252680T1 (zh) |
BR (1) | BR0000555A (zh) |
CA (1) | CA2298901C (zh) |
DE (1) | DE60006013D1 (zh) |
IT (1) | IT1309704B1 (zh) |
RU (1) | RU2187735C2 (zh) |
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JP6831018B2 (ja) * | 2017-11-09 | 2021-02-17 | 日本製鉄株式会社 | 鋼管用ねじ継手 |
WO2019210021A1 (en) | 2018-04-25 | 2019-10-31 | Hydril Company | Wedge thread connection for tubular goods |
PL3572613T3 (pl) * | 2018-05-25 | 2021-05-04 | Vallourec Oil And Gas France | Rurowe połączenie gwintowane do okładzin |
EP3572612B1 (en) * | 2018-05-25 | 2020-10-07 | Vallourec Oil And Gas France | Tubular threaded connection |
PL3572611T3 (pl) * | 2018-05-25 | 2021-07-05 | Vallourec Oil And Gas France | Gwintowane połączenie rurowe |
WO2020039875A1 (ja) * | 2018-08-24 | 2020-02-27 | 日本製鉄株式会社 | 鋼管用ねじ継手 |
RU2768626C1 (ru) * | 2018-12-25 | 2022-03-24 | Ниппон Стил Корпорейшн | Резьбовое соединение для стальных труб |
US20200208760A1 (en) * | 2018-12-27 | 2020-07-02 | Ultra Premium Services, L.L.C. | Connection having balanced pin and box face thickness |
GB201906288D0 (en) * | 2019-05-03 | 2019-06-19 | Oil States Ind Uk Ltd | Pipe coupling |
EP3798409B1 (en) * | 2019-09-24 | 2023-07-12 | Vallourec Oil And Gas France | Threaded connection including an intermediate shoulder |
US10774959B1 (en) * | 2019-11-18 | 2020-09-15 | LFS Technologies, Inc. | Flush joint high torque thread |
AU2020423748B2 (en) * | 2020-01-17 | 2023-09-07 | Nippon Steel Corporation | Threaded connection for pipe |
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US4610467A (en) * | 1981-07-06 | 1986-09-09 | Dril-Quip, Inc. | Connector |
EP0108980B1 (en) * | 1982-11-15 | 1987-01-07 | Quanex Corporation | Tubular connection |
US5066052A (en) * | 1989-03-08 | 1991-11-19 | Baroid Technology, Inc. | Threaded pipe joint having improved seal ring entrapment |
US5462315A (en) | 1992-03-09 | 1995-10-31 | Marubeni Tubulars, Inc. | Stabilized center-shoulder-sealed tubular connection |
US5505502A (en) * | 1993-06-09 | 1996-04-09 | Shell Oil Company | Multiple-seal underwater pipe-riser connector |
US5687999A (en) * | 1995-10-03 | 1997-11-18 | Vallourec Oil & Gas | Threaded joint for tubes |
GB9608709D0 (en) * | 1996-04-26 | 1996-07-03 | Hunting Oilfield Services Ltd | Improvements in and relating to pipe connectors |
FR2761450B1 (fr) * | 1997-03-27 | 1999-05-07 | Vallourec Mannesmann Oil & Gas | Joint filete pour tubes |
-
1999
- 1999-02-19 IT IT1999MI000336A patent/IT1309704B1/it active
-
2000
- 2000-02-09 RU RU2000103498/06A patent/RU2187735C2/ru active
- 2000-02-10 DE DE60006013T patent/DE60006013D1/de not_active Expired - Lifetime
- 2000-02-10 EP EP00200437A patent/EP1030029B1/en not_active Expired - Lifetime
- 2000-02-10 AT AT00200437T patent/ATE252680T1/de not_active IP Right Cessation
- 2000-02-15 CA CA002298901A patent/CA2298901C/en not_active Expired - Fee Related
- 2000-02-16 BR BR0000555-0A patent/BR0000555A/pt not_active IP Right Cessation
- 2000-02-17 US US09/505,684 patent/US6347814B1/en not_active Expired - Lifetime
- 2000-02-17 AR ARP000100669A patent/AR022617A1/es active IP Right Grant
- 2000-02-18 JP JP2000041154A patent/JP4498519B2/ja not_active Expired - Fee Related
- 2000-02-18 CN CNB00102261XA patent/CN1201062C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ITMI990336A1 (it) | 2000-08-19 |
ATE252680T1 (de) | 2003-11-15 |
JP2000240862A (ja) | 2000-09-08 |
EP1030029B1 (en) | 2003-10-22 |
US6347814B1 (en) | 2002-02-19 |
RU2187735C2 (ru) | 2002-08-20 |
BR0000555A (pt) | 2000-10-17 |
EP1030029A1 (en) | 2000-08-23 |
CN1265445A (zh) | 2000-09-06 |
AR022617A1 (es) | 2002-09-04 |
DE60006013D1 (de) | 2003-11-27 |
IT1309704B1 (it) | 2002-01-30 |
CA2298901A1 (en) | 2000-08-19 |
CA2298901C (en) | 2008-04-22 |
JP4498519B2 (ja) | 2010-07-07 |
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