• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A box member and a pin member each have a tapered thread, an abutment end face and a shoulder for engagement respectively with shoulder and end face of the other member, one coacting surface pair being conical, the other one being planar. Shoulder and end face are spaced differently in the two members such that upon engagement of a conical shoulder and end face, planar end face and shoulder have a gap of about 0.5 to 2.5 per cent of the spacing. Taper/bulge seals are provided adjacent the abutment surfaces to be effective before the planar surfaces abut as the joint is made up. The effective pitch diameter of the pin member remains consistently smaller than the pitch diameter of the box member, at least up to an insertion of the pin member so that the planar surfaces abut.
    公开号:SU993829A3
    申请号:SU772470310
    申请日:1977-04-18
    公开日:1983-01-30
    发明作者:Хелльмунд Вольфганг；Круг Герхард；Миссайре Герхард；Ретер Курт；Шаттон Пауль
    申请人:Маннесманн А.Г. (Фирма)；
    IPC主号:
    专利说明:

    () OIL PIPE THREADED CONNECTION
    one
    This invention relates to threaded joints oil. technological pipes used in the exploitation of oil and gas fields .5
    The known threaded connection of oil pipes includes a coupling element with a threaded section and thrust ends located behind the threaded section, a nipple element with a threaded section and stop ends located beyond the threaded section, and the average diameter of the threaded section of the coupling is greater than the average diameter of the threaded the nipple section, and in the 5 screwed-up state the distance between the stop ends of the coupling is larger than the distance between the stop ends of the nipple C1 3.
    However, this connection is characterized by insufficient tightness due to contact between the coupling and the nipple in one stop.
    Closest to the present invention is a threaded connection comprising a bell-shaped connecting element with an internal conical threaded section and a nipple connecting element with an external conical threaded section, having sealing contact edges and resistant conical surfaces at the ends of the threaded sections, and the average thread diameter of the bell-shaped connecting element is larger average thread diameter nipple coupling element C2 J.
    权利要求:
    Claims (2)
    [1]
    When screwing a known compound, there is a danger that when an increased fastening torque is applied, the joint will have tightness, but the possibility of repeated fastening will be excluded due to thread damage, i.e. the connection does not provide a sufficient possibility of uniform loading of the turns of the threaded section of the connection and of adjusting the torque when screwing. 3 The purpose of the invention is to increase the operational reliability and durability of the joint by preventing overloads in the threads. This goal is achieved by the fact that the distance between the stop surfaces of the connecting element with the conical stop surface at the free end is 0.5-2.5 more than the corresponding distance of the other connection element. Let us accept the second abutment surface of the connecting elements located in the plane perpendicular to the axis of the joint. In FIG. Figure 1 shows a threaded joint of oil pipes in a screwed-up state when the conical thrust surface is located on the free end of the socket-shaped coupling element; in fig. 2 - the same, on the free end of the nipple coupling element; in fig. 3-5, views I, It, and III in FIG. 2. A threaded joint of an oil pipe consists of a nipple element 1 and a socket element 2, which are screwed together with each other using a conical thread 3. Both elements 1 and 2 have stop surfaces adjacent to the ends of the thread. FIG. 1, the outer connections of the abutment surfaces 5 and 6 have a conical shape, and the abutment surfaces 7 and 8 lying within the joint are located in the plane perpendicular to the joint axis. In FIG. 2 conical thrust surfaces 5 and 6 are located inside the joint, and thrust surfaces 7 and 8 are outside. The conical abutment surface in the joint is located on the inside of the pipe, if internal pressure prevails, and on the outside of the pipe, if it is sealed predominantly against the apparent pressure. The radial extent of the contact surface 9 (Fig. 3) of the stop surfaces 5 and 6, located in the plane I perpendicular to the axis of the joint, is greater than the radial strength of the contact surface 10 (Fig. K) of the axial stop surfaces 7 and B In the joint, the seal creates not only resistant surfaces, but also sealing conical 11 and 12 and barrel-shaped 13 and 1 contact surfaces. 9 A connecting element with a conical thrust surface on a free end (element 1 in Fig. 2 or element 2 in Fig. 1) has a distance between the thrust end faces 5 and 7 more than the distance between the thrust end faces 6 and 8 by size 15 (Fig. 3 ) equal to 0,, 5 distances between the thrust ends 6 and 8. The average diameter 16 of the thread of the socket, connecting element 2 is larger than the average diameter of 1 thread of the nipple coupling element 1. The screwed connection of oil pipes during screwing works by increasing the distance between resistant surfaces with edinitelnogo element with a conical abutment surface on the free end of the corresponding distance of another connecting element for the size 15 (Fig. 3). In this case, at the initial moment of screwing up, conical thrust surfaces 5 and 6 meet each other first. With further screwing, the bell-shaped connecting element through the power base in the thread is subjected to axial tension and consequently elastic elongation; and thread-free trunnions are subjected to radial elastic compression. Due to the elastic deformation, the gaps between the abutment surfaces on both tubular elements 1 and 2 and the abutment surfaces 7 and 8 meet with each other when the minimum torque is reached. Choosing a size 15 of 0.52, 5, the distance between the abutment surfaces 6 and 8 turned out to be the most advantageous, since, when screwing the elements, the latter are not loaded above the respective stretch limits of the material, i.e. damage to the connecting elements does not occur and reuse of the connection is ensured. With a further increase in the fastening moment, increased contact stresses also appear on the abutment surfaces 7 and 8, which prevents the axial expansion in the socket connecting element 2 from further increasing. In addition, the penetration of the coupling element 1 into the socket coupling element 2 decreases. preventing the occurrence of tangential stretching of the races of the pipe connecting element 2 by means of the teeth of the thread 3, (FIG. 5). The prevention of the occurrence of tangential stress in the socket connecting element is also provided due to the overlapping of the teeth of the thread 3, for which the average diameter of the thread of the socket connecting element is made larger than the average diameter of the thread of the nipple coupling element. Technical and economic efficiency is to increase the life of the joint by preventing its destruction while increasing the fastening torque of the joint. Claims of the invention: A threaded joint of oil pipes comprising a bell-shaped and nipple joint with unique elements with a threaded conical section, sealing contact joints and abutting surfaces at the ends of the threaded section; threaded nipple connecting element, characterized in that, in order to increase the operational reliability and durability of the connection due to of overloading in turns of thread, the distance between the stop surfaces of the connecting element with a conical stop surface at the free end is more than the corresponding distance of the other connecting element by 0.5-2.5, with the second stop surface of the connecting elements located in a plane perpendicular to coupling axis. Sources of information taken into account during the examination 1. If U.S. patent, cl. 285-33, pub. 1936.
    [2]
    2. US patent number 3359013, cl. 285-33, pub. 1968.
    2 / J
    F
    f2
    类似技术:
    公开号 | 公开日 | 专利标题
    SU993829A3|1983-01-30|Threaded joint for oil pipes
    KR880001667B1|1988-09-05|Improvements in and relating to pipe connectors
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    US3224799A|1965-12-21|Threaded tube joint having a metal-to-metal seal
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    同族专利:
    公开号 | 公开日
    FR2364322A1|1978-04-07|
    MX143577A|1981-06-03|
    CS214654B2|1982-05-28|
    JPS6030877B2|1985-07-18|
    FR2364322B1|1983-10-07|
    CA1084553A|1980-08-26|
    RO74789A|1980-10-30|
    NO772078L|1978-03-15|
    US4153283A|1979-05-08|
    JPS5336024A|1978-04-04|
    AR222779A1|1981-06-30|
    DE2641767B2|1979-05-31|
    BR7704270A|1978-04-25|
    NO160025C|1989-03-01|
    IT1115293B|1986-02-03|
    NO160025B|1988-11-21|
    DE2641767A1|1978-03-16|
    GB1589069A|1981-05-07|
    引用文献:
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    DE2438387C3|1974-08-07|1978-03-09|Mannesmannroehren-Werke Ag, 4000 Duesseldorf|Threaded connection for oilfield pipes|US4384737A|1980-04-25|1983-05-24|Republic Steel Corporation|Threaded joint for well casing and tubing|
    DE3117696C2|1981-04-28|1983-08-18|Mannesmann AG, 4000 Düsseldorf|Casing for the petroleum-natural gas extraction industry|
    CA1182490A|1981-12-17|1985-02-12|Hughes Tool Company|Tool joint with internal/external make-up shoulder|
    DZ508A1|1982-02-18|2004-09-13|Vallourec|New seal for high pressure tight steel tubes and not very sensitive to seizure.|
    JPS6144068Y2|1982-04-16|1986-12-12|
    US4471965A|1982-05-05|1984-09-18|Fmc Corporation|High-pressure fire-resistant metal seal|
    DE3368963D1|1982-11-15|1987-02-12|Quanex Corp|Tubular connection|
    FR2561747B1|1984-03-22|1986-08-14|Vallourec|NEW JOINT FOR STEEL TUBES, ITS MANUFACTURING PROCESS AND TOOLS FOR IMPLEMENTING THE PROCESS|
    JPH0231271B2|1984-06-20|1990-07-12|Nippon Kokan Kk|
    US4688832A|1984-08-13|1987-08-25|Hydril Company|Well pipe joint|
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    AT392974B|1989-07-13|1991-07-25|Chemiefaser Lenzing Ag|MIXED POLYIMIDES AND METHOD FOR THE PRODUCTION THEREOF|
    US5092635A|1990-04-27|1992-03-03|Baker Hughes Incorporated|Buttress thread form|
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    US5810401A|1996-05-07|1998-09-22|Frank's Casing Crew And Rental Tools, Inc.|Threaded tool joint with dual mating shoulders|
    US6056324A|1998-05-12|2000-05-02|Dril-Quip, Inc.|Threaded connector|
    FR2784446B1|1998-10-13|2000-12-08|Vallourec Mannesmann Oil & Gas|INTEGRAL THREADED ASSEMBLY OF TWO METAL TUBES|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2641767A|DE2641767B2|1976-09-14|1976-09-14|Threaded connection for oil field pipes|
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