WO1997016669A1 - Raccord de tuyaux - Google Patents

Raccord de tuyaux Download PDF

Info

Publication number
WO1997016669A1
WO1997016669A1 PCT/EP1996/004702 EP9604702W WO9716669A1 WO 1997016669 A1 WO1997016669 A1 WO 1997016669A1 EP 9604702 W EP9604702 W EP 9604702W WO 9716669 A1 WO9716669 A1 WO 9716669A1
Authority
WO
WIPO (PCT)
Prior art keywords
pin member
projections
connector
pin
box member
Prior art date
Application number
PCT/EP1996/004702
Other languages
English (en)
Inventor
Wilhelmus Christianus Maria Lohbeck
Original Assignee
Shell Internationale Research Maatschappij B.V.
Shell Canada Limited
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 Shell Internationale Research Maatschappij B.V., Shell Canada Limited filed Critical Shell Internationale Research Maatschappij B.V.
Priority to AU75614/96A priority Critical patent/AU7561496A/en
Priority to GB9808324A priority patent/GB2322424B/en
Publication of WO1997016669A1 publication Critical patent/WO1997016669A1/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
    • F16L37/00—Couplings of the quick-acting type

Definitions

  • the present invention relates to a pipe connector for connecting a first pipe section to a second pipe section. More specifically, the invention relates to a connector which allows a pipe connection to be made by stabbing a pin member into a box member.
  • British patent application No. 2 099 529 discloses a pipe coimecLox having a pm memoer ana a JDOX member, which members are telescopingly arranged relative to each other, the pin member having an outer surface provided with a plurality of axially spaced outward annular projections and the box member having an inner surface provided with a plurality of axially spaced inward annular projections, said outward projections and inward projections being arranged so as to intermesh when the connector is assembled.
  • the intermeshing projections are arranged on frustoconical surfaces in order to achieve fluid sealing during make-up when pressurised fluid is injected between the members via a longitudinal recess extending between the pin member and the box member.
  • frustoconical surfaces increase the production costs of the connector as they have to be machined to close tolerances .
  • a pipe connector for connecting a first pipe section to a second pipe section
  • the connector comprising a pin member and a box member, said members being telescopingly arranged relative to each other, the pin member having a cylindrical outer surface provided with a plurality of axially spaced outward annular projections and the box member having a cylindrical inner surface provided with a plurality of axially spaced inward annular projections, 5 said outward projections and inward projections being arranged so as to intermesh when the connector is assembled.
  • the cylindrical surfaces of the pin and box member obviate the need for machining of frustoconical surfaces, i ⁇ ct ⁇ La ielo e r_he manufacturing costs ot tne connector according to the invention are significantly reduced. Furthermore, there is no need to create a longitudinal recess between the pin and box member for inserting pressurised fluid during make-up since the size of the 15 projections of the pin member and the box member can be dimensioned so that the connector is made-up by applying a suitable axial compressive force to the members.
  • the connector according to the invention can be made in sizes smaller than those of conventional connectors, 20 for example the connector can have a diameter as small as 0.01 m.
  • Suitable materials for the connector are, for example, steel, plastic or composite material.
  • a radial pressure between the pin member and the box member is created by radial elastic deformation of at least one of the pin member and the box member during make up of the connector.
  • 30 outward and inward projections has a substantially radial load shoulder, whereby the radial load shoulder of each outward projection of the pin member engages a radial load shoulder of a corresponding inward projection of the box member so as to transmit an axial load between the 35 pin member and the box member.
  • the spacing between the projections can be selected such that most or all of the radial load shoulders transmit substantially equal parts of the axial load. This can be achieved for example by varying the spacing between the projections along the length of the connector.
  • each of said outward projections of the pin member has a tapered stabbing shoulder which slides along the inner surface of the box member during telescoping movement of the two members wnen tine pm memoer is connected to the box member.
  • each of said inward projections of the box member has a tapered stabbing shoulder which slides along the outer surface of the pin member during telescoping movement of the two members to connect the pin member to the box member.
  • each of said inward and outward projections is selected such that the radial deformation of the members during make-up does not exceed the elastic limit of the connector material, said height being for example between 0.2-0.4% of the average diameter of the connector.
  • a suitable height of the projections of a steel connector is for example 0.3% of the average diameter of the connector.
  • the bundle comprises a plurality of said connectors, each connector connecting one of said first pipe sections to a corresponding one of the second pipe sections.
  • Fig. 1 schematically shows a longitudinal cross- section of an embodiment of the pipe connector according to the invention
  • Fig. 2 schematically shows a longitudinal cross- section of an alternative embodiment of the pipe connector according to the invention.
  • a pipe connector i navmg a longitudinal axis 2, the connector 1 connecting a first pipe section 3 to a second pipe section 5.
  • the connector has a pin member 7 which is integrally formed with the first pipe section 3 and a box member 9 which is integrally formed with the second pipe section 5, the pin and box member being arranged in a telescoping relationship.
  • the pin member 7 has a cylindrical outer surface 11 provided with a plurality of axially spaced outward annular projections 13 and the box member 9 has a cylindrical inner surface 14 provided with a plurality of axially spaced inward annular projections 15, which outward projections 13 and inward projections 15 are arranged in an intermeshing relationship.
  • the outward projections 13 of the pin member 7 are formed by cutting a plurality of axially spaced annular grooves 17 in the outer surface 11 of the pin member 7, each outward projection 13 being located between two adjacent grooves 17 of the pin member.
  • the inward projections 15 of the box member 9 are formed by cutting a plurality of axially spaced annular grooves 19 in the inner surface 14 of the box member 9, each inward projection 15 being located between two adjacent grooves 19 of the box member 9.
  • Each of said outward and inward projections 13, 15 has a radial load shoulder 20a, 20b whereby the radial load shoulder 20a of each outward projection 13 of the pin member 7 engages the radial load shoulder 20b of a corresponding inward projection 15 of the box member 9 so as to transmit an axial load between the pin member 7 and the box member 9.
  • each outward projection 13 of the pin member 7 has a tapered stabbing shoulder 21a which slides along the inner surface 14 of the box member y during uelescopmg movement ot tne two members 7, 9 when the pin member 7 is connected to the box member 9.
  • each inward projection 15 of the box member 9 has a tapered stabbing shoulder 21b which slides along the outer surface 11 of the pin member 7 during telescoping movement of the two members 7, 9 when the pin member 7 is connected to the box member 9.
  • the cylindrical outer surface 11 of the pin member 7 has been machined to a reduced outer diameter, and the cylindrical inner surface 14 of the box member 9 has been machined to an enlarged inner diameter.
  • the pipe connector 1 is internally and externally flush with the pipe sections 3, 5.
  • the inward annular projection 15' closest to the end of box member 9 opposite the pipe section 5 does not intermesh with an outward projection of the pin member 7. Instead, this final inward projection 15' is in abutment with the plain cylindrical outer surface 11 of the pin member 7.
  • This arrangement causes the final inward projection 15' of the box member 9 to be pushed firmly against the plain cylindrical outer surface 11 of the pin member 7 thereby ensuring a reliable metal-to-metal seal.
  • the wall thickness of the pin member 7 and the box member 9 has not been reduced. Instead the grooves 17 of the pin member are directly formed on the outer surface of the first pipe section 3, and the grooves 19 of the box member are directly formed on the inner surface of the box member.
  • the box member 9 has been formed by expanding the end part of the second pipe section 5 so as to have an inner diameter which is slightly smaller (for example 0.3% smaller) than the outer diameter of the pin member 7.
  • This embodiment has the advantage of ease of lu manufacturing ana proviaes a nign pun-out rorce comparable to that of the flush connector shown in Fig. 1.
  • the outward annular projection 13' closest to the end of pin member 7 opposite the pipe section 3 does not intermesh with an outward projection of the box member 9.
  • the pin and box member are so dimensioned that during make-up of the connector 1 the radial deformation of the members 7, 9 is substantially elastic, although some plastic deformation is allowable.
  • the connector 1 is able to withstand high axial tensile forces and internal fluid pressures whereby the intermeshing inward and outward projections ensure adequate metal-to-metal sealing which is enhanced by the abutment of the final inward projection 15' against the
  • the load shoulders can be formed at an angle relative to the radial direction. If, for example, a high pull out force is required the load shoulders can be formed at a sharp angle so as to create a sharp edge. If on the other hand repeated connecting and disconnecting is required the load shoulders can be formed at an obtuse angle.
  • pin and box members having ⁇ j. ⁇ ⁇ ux ⁇ V- J- O - oc ⁇ -L un , HUWC V Ci L-ilC UieilUJtil to ( dll ndV ⁇ any cross-sectional shape which suits the specific application, for example a rectangular or hexagonal cross-section.
  • the pin member instead of the box member having a final projection which does not intermesh with a corresponding projection of the pin member, the pin member can have such final projection, or both members can be provided with such final projections.
  • the box member instead of the pin member having a final projection which does not intermesh with a corresponding projection of the box member, the box member can have such final projection, or both members can be provided with such final projections.
  • a distinctive advantage of the connector according to the invention is the absence of a longitudinal groove between the pin member or the box member. Such longitudinal groove is present in most of the prior art pipe connectors to allow pressurised fluid to be inserted between the pin and box member during make-up.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

Ce raccord (1) destiné à relier une première section (3) de tuyau à une seconde de section (5) de tuyau comprend un élément broche (7) ainsi qu'un élément emboîtant (9), lesquels sont disposés de manière télescopique l'un par rapport à l'autre. L'élément broche (7) présente une surface extérieure cylindrique (11) pourvue d'une pluralité d'épaulements (13) annulaires, dirigés vers l'extérieur et espacés axialement, et l'élément emboîtant (9) présente une surface intérieure cylindrique (14) pourvue d'une pluralité d'épaulements (15) annulaires, dirigés vers l'intérieur et espacés axialement, ces épaulements extérieurs (13) et intérieurs (15) étant conçus de manière à s'emboîter les uns dans les autres lors de l'assemblage du raccord.
PCT/EP1996/004702 1995-10-30 1996-10-29 Raccord de tuyaux WO1997016669A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU75614/96A AU7561496A (en) 1995-10-30 1996-10-29 Pipe connector
GB9808324A GB2322424B (en) 1995-10-30 1996-10-29 Pipe connector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP95202932 1995-10-30
EP95202932.0 1995-10-30

Publications (1)

Publication Number Publication Date
WO1997016669A1 true WO1997016669A1 (fr) 1997-05-09

Family

ID=8220781

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/004702 WO1997016669A1 (fr) 1995-10-30 1996-10-29 Raccord de tuyaux

Country Status (3)

Country Link
AU (1) AU7561496A (fr)
GB (1) GB2322424B (fr)
WO (1) WO1997016669A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2094491A (en) * 1934-07-20 1937-09-28 Janata Rudolph Screw thread joint
US4779902A (en) * 1987-07-06 1988-10-25 Mid-Continent Pipe & Supply Co., Inc. Plastic pipe with integral end connection
DE9320169U1 (de) * 1993-12-30 1994-04-07 Langenhan, Claus, 24113 Kiel Kurzrohr-Inliner
WO1994008168A1 (fr) * 1992-10-07 1994-04-14 Permalok Corporation Ensemble raccord de tuyau et procede de raccordement de deux longueurs de tuyaux d'acier par un ajustement serre

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099529B (en) * 1981-06-02 1984-07-04 Hunting Oilfield Services Ltd Improvements in and relating to pipe connectors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2094491A (en) * 1934-07-20 1937-09-28 Janata Rudolph Screw thread joint
US4779902A (en) * 1987-07-06 1988-10-25 Mid-Continent Pipe & Supply Co., Inc. Plastic pipe with integral end connection
WO1994008168A1 (fr) * 1992-10-07 1994-04-14 Permalok Corporation Ensemble raccord de tuyau et procede de raccordement de deux longueurs de tuyaux d'acier par un ajustement serre
DE9320169U1 (de) * 1993-12-30 1994-04-07 Langenhan, Claus, 24113 Kiel Kurzrohr-Inliner

Also Published As

Publication number Publication date
GB2322424A (en) 1998-08-26
AU7561496A (en) 1997-05-22
GB2322424B (en) 1999-08-18
GB9808324D0 (en) 1998-06-17

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