[go: up one dir, main page]

WO1996005462A1 - Raccord de tuyaux - Google Patents

Raccord de tuyaux Download PDF

Info

Publication number
WO1996005462A1
WO1996005462A1 PCT/DE1995/001040 DE9501040W WO9605462A1 WO 1996005462 A1 WO1996005462 A1 WO 1996005462A1 DE 9501040 W DE9501040 W DE 9501040W WO 9605462 A1 WO9605462 A1 WO 9605462A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
pipe connector
flank
line
pin
Prior art date
Application number
PCT/DE1995/001040
Other languages
German (de)
English (en)
Inventor
Erich Quadflieg
Christoph Bunsen
Thomas Gigowski
Friedrich Lenze
Martin SCHLÜTER
Original Assignee
Mannesmann Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann Ag filed Critical Mannesmann Ag
Publication of WO1996005462A1 publication Critical patent/WO1996005462A1/fr

Links

Classifications

    • 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
    • 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 than one threaded section

Definitions

  • the invention relates to a pipe connector according to the preamble of the main claim.
  • Pipe connectors are used to connect tubular elements, for example pipelines, which in particular convey fluids under pressure, such as gas or oil. When searching for oil or gas, these pipes are used as casing or production pipes.
  • the pipe connections considered here are usually made with threads, an external thread on a pin element and a
  • Pin element and the inside of the sleeve element are arranged and are firmly pressed together by screwing them together.
  • the pin element In the case of an inner shoulder, the pin element is pressed together between the shoulder and the thread and the sleeve element is stretched between the shoulder and the thread.
  • the pin element In the case of an outer shoulder, the pin element is stretched between the shoulder and the thread and the socket end is pressed together between the shoulder and the thread.
  • the stresses in the socket and spigot caused by the surface pressure in the shoulder are predominantly absorbed only by the last few thread teeth of the thread, which are adjacent to the shoulder surfaces. The other thread lengths are only extremely lightly loaded.
  • Total stress can reach a value that is greater than the permissible yield strength.
  • Axial tension can cancel the preload in the joint and thus its effect of positioning and sealing, axial pressure can lead to plastic deformation in the shoulder area and, with subsequent tensile loading, render the sealing function ineffective by lifting off the joint.
  • Pipe connector disclosed.
  • the pipe connector has an intermediate portion of the thread between the ends of the male and female threads in which both elements have the same pitch.
  • the end sections are the slopes between tenon and
  • Socket thread different, depending on the position of the joint: If the annular sealing surfaces (butt) are on the inside of the pipe, then the thread of the pin element has a greater pitch than the thread of the sleeve element; if the sealing surface is on the outside of the pipe, it is the other way round.
  • the proposed arrangement is intended to transmit the reaction force resulting from the impact evenly to the thread teeth. However, loads such as axial compression and bending continue to a large extent in the impact that is already significantly pre-stressed by the screw connection
  • the object of the invention is to provide a pipe connector that is easy to manufacture and with which a load bearing for all external
  • Loads on the connection are mainly achieved via the thread. Loads that particularly endanger known pipe connectors with a butt shoulder, such as axial compression, bending and excessive screwing moments, should no longer be caused solely by the butt to
  • the pipe connector according to the invention is characterized in that an element, preferably the pin element, as is known
  • Thread flank line with a constant taper pitch in the usual range of 1: 6 to 1:16.
  • the sleeve element has one with regard to
  • Screw position at least in a certain area, be it the Thread center area or more the edge areas an oversize of
  • Thread flank diameter In addition to the radial bracing, this thread overlap essentially creates an axial bracing in the thread due to the Poisson effect.
  • bracing occurs due to local expansion due to overlap and due to the axial contraction of the sleeve as well as correspondingly due to the local constriction and the associated transverse expansion of the pin element.
  • thread forms cause the axial bracing to be negative due to their profile design
  • Thread flank line also possible in the pin element.
  • the idea of the invention can also be applied to integral connectors.
  • the structural design of the sleeve element can be in different
  • Screwing position an axial bracing is generated in the thread.
  • the main variants are; the convex contour of the
  • Thread flank line and in combination with a clearly pronounced negative load flank a steeper or flatter socket cone in the
  • a flank inclination in the range from -7 ° to -12 ° is selected.
  • a special feature is the freely designed socket thread flank line, for example in the form of a flat sinus curve. This contour has a diameter for the socket thread flank line, which is partly larger and partly smaller and at certain locations the same as the locations of the journal flank line corresponding to the screwing position. As a result, different tensions can be achieved at several locations, distributed over the entire thread length.
  • the construction does not rule out an impact as a positioning element or as an additional support element for absorbing extreme axial pressure loads or bending. However, axial compression and the pressure component of the bend are also taken over by the thread in this case, thus preventing the shoulder from being overloaded.
  • the tooth height of the thread can be reduced compared to conventional connectors.
  • the pipe connector is smaller in its height, which leads to an enlargement of the annular space cross-sections in bores and permits slimmer piping.
  • the axial pressure or bending strength of the connection can be increased, as can the screwing torque. Increased bending strength and increased screwing torque are of particular advantage e.g. at
  • Frictional resistance of the borehole wall or of the cement can be overcome without overloading or damaging the connection.
  • Fig. 1 shows a longitudinal section through a pipe connector with a sleeve
  • Figure 2 is a longitudinal section through a pipe connector as
  • FIG. 3 shows a longitudinal section through a threaded area with a
  • FIG. 5 shows a longitudinal section through a threaded area with a freely shaped sleeve thread flank line in the screwing position.
  • FIG. 5a shows the thread of the sleeve element
  • Figure 6 shows a two-stage thread with different taper inclinations in
  • Load flank the surface of the thread, the axial
  • Leading flank The flank of the same thread tooth opposite the load flank.
  • the guide flank is usually not loaded with screwed threads under tension.
  • Flank angle The angle that the flank forms with a normal to the thread axis in the thread profile
  • flank angle is said to be positive if the angle in the thread gap between the flank and the thread root adjoining the flank is greater than the angle in the thread gap between the normal to the thread axis and the same thread root, this angle is smaller than the angle between the normal to the thread axis and the thread root, the flank angle is called negative.
  • Flank diameter line jacket line of an imaginary, coaxial to the
  • Threaded body usually a cylinder or a truncated cone, which cuts the flanks such that the sections formed for the sewing head and thread base are the same size.
  • Threaded body usually a cylinder or a truncated cone, the jacket of which touches the thread heads of the external thread or the thread root of the internal thread.
  • Core diameter line surface line of an imaginary, coaxial to the
  • Thread lying body usually a cylinder or a truncated cone
  • the jacket line touches the thread root of the external thread or the thread tips of the internal thread.
  • Coverage Coverages are assigned to oversizes
  • pipe connectors are shown in a longitudinal section, namely in Figure 1 with a sleeve and in Figure 2 as an integral connection.
  • the first-mentioned pipe connector consists of a sleeve 1, which is provided with two conical threaded sections 2, 3 and has a sealing seat and a joint on both sides in the central area. The details of the sealing seat and joint are not shown here since these are not essential to the invention.
  • the two pipes 4, 5 to be connected are designed in the end region as pin elements 6, 7 and, in addition to the thread of the sleeve 1, also have conical thread sections 8, 9.
  • the one shown in FIG. 2 does not apply
  • the two pipes 10, 11 to be connected are designed in their end regions on the one hand as a pin element 12 and on the other hand as a sleeve element 13.
  • the two elements 12, 13 each have a complementary conical design
  • Threaded section 14.15 The depiction of the joint and sealing seat has been omitted.
  • FIG. 3 shows the longitudinal section of a threaded area in the screwed position with a convex socket-thread fill line 16
  • the overlap can be seen here as a penetration in the central region 18 of the thread. Because of the convex shape of the socket thread flank line 16, there is no edge regions 19, 20 Overlap and thus no axial bracing.
  • FIG. 4 shows a longitudinal section of a threaded area with a pin 21 and a socket thread 22 in the screwed position.
  • the thread flank lines 23, 24 have different taper inclinations. Both threads have a negative load flank 25.
  • FIGS. 4a, 4b, 4c show enlarged sections of FIG. 4. Overlaps are again shown as penetrations. The principle of the tensioning of the load flank 26 against the guide flank 27 in FIG. 4b of the thread can be seen in FIG. 4c.
  • Figure 5a shows the thread of the sleeve element 1 in an individual representation
  • 5b the thread of the
  • Pin element 6 The exemplary representation shows areas 34 with radial overlap, areas 35 with radial play, which necessitate axial bracing (analogous to FIG. 4), and areas 35 free of play and tension.
  • FIG. 6 An example shows in FIG. 6 how the idea according to the invention in various forms is divided into two thread stages 37, 38. Both stages have this thread
  • FIGS. 6a, 6b and 6c show enlargements of the cutout analogous to the cutout enlargements of FIG. 4, with overlaps leading to tension being shown again as penetrations.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne un raccord de tuyaux comportant un manchon à filet intérieur conique, ainsi qu'une pièce intérieure à filet extérieur conique permettant ainsi le vissage de ces deux éléments. Les parties filetées sont reliées à une partie non filetée conçue éventuellement sous forme de siège métallique étanche. Un élément (6, 21, 43) de ce raccord présente une ligne de flanc de filets (17, 24, 31, 39, 40) connue, d'inclinaison constante et l'autre élément (1, 22, 44) présente une ligne de flanc de filets (16, 23, 30, 41, 42) qui s'écarte au niveau du contour et/ou du cône.
PCT/DE1995/001040 1994-08-08 1995-07-27 Raccord de tuyaux WO1996005462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4428871.9 1994-08-08
DE19944428871 DE4428871C2 (de) 1994-08-08 1994-08-08 Rohrverbinder

Publications (1)

Publication Number Publication Date
WO1996005462A1 true WO1996005462A1 (fr) 1996-02-22

Family

ID=6525714

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001040 WO1996005462A1 (fr) 1994-08-08 1995-07-27 Raccord de tuyaux

Country Status (2)

Country Link
DE (1) DE4428871C2 (fr)
WO (1) WO1996005462A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2168102C1 (ru) * 2000-08-08 2001-05-27 Андреев Владимир Кириллович Соединение насосно-компрессорных или бурильных труб
RU179148U1 (ru) * 2018-02-02 2018-04-28 Общество с ограниченной ответственностью "Пермская компания нефтяного машиностроения" Ниппель двухупорного резьбового соединения

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373754A (en) * 1978-08-09 1983-02-15 Hydril Company Threaded connector
WO1986003570A1 (fr) * 1984-12-06 1986-06-19 Thread Technology International Connexion filetee amelioree pour tubes
GB2234308A (en) * 1989-07-28 1991-01-30 Advanced Thread Systems Inc Threaded tubular connection
WO1993006404A1 (fr) * 1991-09-18 1993-04-01 Johnson Fred W Raccordement tubulaire optimise
WO1993018329A1 (fr) * 1992-03-09 1993-09-16 Marubeni Tubulars, Inc. Raccord tubulaire a joint hermetique stabilise centre-epaulement

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL271091A (fr) * 1961-11-07 1964-07-27
FR2190237A5 (fr) * 1972-06-16 1974-01-25 Vallourec
US5348350A (en) * 1980-01-19 1994-09-20 Ipsco Enterprises Inc. Pipe coupling
GB8323348D0 (en) * 1983-08-31 1983-10-05 Hunting Oilfield Services Ltd Pipe connectors
US5330239A (en) * 1990-01-19 1994-07-19 Ipsco Enterprises Inc. Pipe coupling
DE4111463A1 (de) * 1991-04-09 1992-10-15 Festo Kg Aussengewinde und innengewinde, vorzugsweise zur herstellung fluidischer verbindungen in der pneumatik
CA2059622C (fr) * 1991-10-03 1996-06-25 Thomas Layton Blose Raccord de tuyauterie
IL111941A (en) * 1994-12-09 1997-08-14 Ofer Haifa Haifa And Eliahu Do Letter opener

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373754A (en) * 1978-08-09 1983-02-15 Hydril Company Threaded connector
WO1986003570A1 (fr) * 1984-12-06 1986-06-19 Thread Technology International Connexion filetee amelioree pour tubes
GB2234308A (en) * 1989-07-28 1991-01-30 Advanced Thread Systems Inc Threaded tubular connection
WO1993006404A1 (fr) * 1991-09-18 1993-04-01 Johnson Fred W Raccordement tubulaire optimise
WO1993018329A1 (fr) * 1992-03-09 1993-09-16 Marubeni Tubulars, Inc. Raccord tubulaire a joint hermetique stabilise centre-epaulement

Also Published As

Publication number Publication date
DE4428871C2 (de) 1996-10-02
DE4428871A1 (de) 1996-02-15

Similar Documents

Publication Publication Date Title
EP0778928B1 (fr) Raccord de tuyaux
EP1232322B1 (fr) Raccord pour tuyaux
EP1009946B1 (fr) Raccord pour canalisations
DE60318070T2 (de) Rohranschlussstück mit gewinde
DE3431808C2 (fr)
DE4446806C1 (de) Gasdichte Rohrverbindung
DE69207042T2 (de) Verbindung für Hochdruckleitungen
EP0087557B1 (fr) Raccord de tuyaux pour tuyaux métalliques
DE69922661T2 (de) Schraubverbindung für verbesserte ermüdungsfestigkeit
DE3431635C2 (fr)
DE3434763A1 (de) Schraubkupplung fuer oelrohre
EP0141276A2 (fr) Raccord à douille verrouillée pour tuyaux, notamment pour tuyaux à manchon
DE102019207681A1 (de) Verbindungselement
EP2816169B1 (fr) Procédé de liaison de deux barres disposées de manière excentrique l'une par rapport à l'autre et dispositif de liaison de deux composants dotés respectivement d'une barre
DE3852109T2 (de) Rohrförmige verbindung mit variabler metall-auf-metall-dichtungsbreite.
DE10152261A1 (de) Hochdruckspeicher wie Kraftstoffhochdruckspeicher
DE102022112895A1 (de) Verbindungsanordnung zur Übertragung eines Drehmoments
WO1999066170A1 (fr) Raccord de tige de forage
DE4428871C2 (de) Rohrverbinder
DE102006036862B4 (de) Rohrverbindung und Zwischenelement zu deren Herstellung
EP2592260A1 (fr) Injecteur de carburant, procédé de montage d'un injecteur de carburant et dispositif de serrage pour le montage d'un injecteur de carburant
EP1099071A2 (fr) Raccord de tuyaux
DE102005041907A1 (de) Verlaufende Bolzenbohrungsgeometrie für einen Kolben einer Brennkraftmaschine
DE2645361A1 (de) Rohrfoermiger koerper aus faserverstaerkten kunststoffen
DE2054560C3 (de) Rohrkupplung, die einseitig für den Anschluß eines Kunststoffrohres ausgebildet ist

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA JP MX NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase