WO2008042105A2 - Ensemble de tuyaux à raccord par pression - Google Patents

Ensemble de tuyaux à raccord par pression Download PDF

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Publication number
WO2008042105A2
WO2008042105A2 PCT/US2007/020097 US2007020097W WO2008042105A2 WO 2008042105 A2 WO2008042105 A2 WO 2008042105A2 US 2007020097 W US2007020097 W US 2007020097W WO 2008042105 A2 WO2008042105 A2 WO 2008042105A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
assembly
engagement surface
extent
pipes
Prior art date
Application number
PCT/US2007/020097
Other languages
English (en)
Other versions
WO2008042105A3 (fr
Inventor
Kris L. Church
Original Assignee
Gandy Technologies Corporation
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 Gandy Technologies Corporation filed Critical Gandy Technologies Corporation
Publication of WO2008042105A2 publication Critical patent/WO2008042105A2/fr
Publication of WO2008042105A3 publication Critical patent/WO2008042105A3/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
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/10—Sleeveless joints between two pipes, one being introduced into the other

Definitions

  • This invention relates in general to methods and apparatus for joining pipe ends and in particular to a push-together assembly method for joining pipe ends.
  • a suitable push-together connection which did not require rotation of the respective pipe ends being joined would have advantages in off shore applications, for example, by providing the ability of being able to make-up and disconnect underwater connections remotely. Also, a push-together connection of this type would be simple to implement and would eliminate costly welding operations which have become almost prohibitive in some situations due to the high hourly cost of offshore operations.
  • connection system could have application for drive pipe, riser pipe, conduit and casing liners for oil and gas operations, for example.
  • a threadless connector for large diameter casings has also been used in the past which was based upon a snap-ring linkage type mechanism.
  • These "snap-ring" type connectors offer fast make-up but offer neither the low weight-to-capacity ratio, nor the integrity or price competitiveness of the threaded connector for a given capacity.
  • Adhesion joint Another technique which has been proposed for joining pipe ends, where the pipes themselves cannot be rotated, is the use of the so-called "adhesion joint.”
  • This method injects, for example, an acrylic adhesive into the clearance of the joint interval, after which a post-line tube is inserted. It is possible to carry out the construction in a shorter time than the welding method, but the adhesive may not be applied uniformly, resulting in compromised connections. The adhesives may be messy to apply and may not furnish the required strength for some connection applications.
  • U.S. Patent No. 4,846,508, issued July 11, 1989, to Pallini, Jr. Et al. shows a tubular connector system for joining two pipe ends without the necessity of rotating the pipe ends.
  • One pipe end is provided with an external thread and a second pipe end includes multiple thread lead entries.
  • a special tubular connector is also provided which includes an internal thread at one end and internal multiple thread lead entries at the other end.
  • the tubular connector is first threaded onto the first pipe.
  • the second pipe is stabbed into the second end of the tubular connector and the tubular connector is then rotated less than a single turn with respect to the second pipe to fully mate the tubular connector and the second pipe. It appears that the connector is screwed all the way in on a first pipe end and is then "backed-off" a slight amount as the second pipe end is screwed in (rotated less than a single turn).
  • the push-together pipe assembly of the invention allows two pipe sections to be joined with only a partial rotation of one of the sections.
  • the pipe assembly includes a first pipe having a first tapered end with an inner extent and an outer extent.
  • the tapered end slopes inwardly from the inner extent to the outer extent thereof to thereby form a respective mouth opening of the first pipe.
  • the first pipe tapered end has a specially contoured engagement surface, the engagement surface being comprised of a plurality of helical spline wedges, each of which is oppositely tapered from an inner extent to an outer extent thereof in width, whereby the helical spline wedges form an alternating series of lands and grooves as viewed from the respective mouth openings.
  • the second pipe to be connected also has a specially contoured engagement surface on an outer extent thereof, the second pipe engagement surface being sized to be matingly engaged with the first pipe engagement surface, whereby the respective pipe ends may be joined by axial movement of one pipe relative to another.
  • the axial movement of one pipe relative to another causes a slight rotation of one pipe relative to another.
  • the rotation of one pipe relative to another is less than one complete turn.
  • the specially contoured surfaces on the first pipe end are on the exterior of the first pipe end, and wherein the second pipe end is a box end.
  • the specially contoured surfaces on the first pipe end are on the interior of the first pipe end, and wherein the second pipe end is a pin end.
  • the helical spline wedges are arranged on the specially contoured surface of the pipe along a dominant axis, the dominant axis being longitudinal rather than helical.
  • the first and second pipes are provided with the specially contoured engagement surfaces, as previously described.
  • the first pipe end is brought into engagement with the second pipe end.
  • a selected one of the first and second pipes is then pushed axially with respect to the other respective pipe, thereby securing the pipe ends together.
  • An assembly force is thus applied to a selected one of the pipes in order to form a connection between the two pipes, and wherein the assembly force causes one of the pipes to rotate less than 360° before the pipes are fully connected.
  • the pipes being joined are tubular goods of the type used in construction, oil and gas and mining.
  • the tubular goods can be used to join drive pipe, riser pipe, conduit and casing liners for oil and gas production.
  • Figure 1 is a perspective view of a coupling used in one version of the tubular connector system of the invention.
  • Figure 2 is a partly schematic view of the coupling of Figure 1 being used to join two opposing box pipe ends, the pipe ends being shown in partly transparent fashion for ease of illustration.
  • Figure 3 is an exploded view of another version of the coupling of the invention in which the coupling has the specially contoured surfaces on the interior of the tapered ends thereof for mating with specially contoured exterior surfaces on the pin ends of the two pipes to be joined.
  • Figure 4 is a simplified schematic illustration of a thread on a tubular body illustrating the definition of a thread versus a spline.
  • Figure 5 is a view of another versions of the pipe connection system of the invention in which a flush push joint is utilized.
  • FIG. 1 there is shown one version of a push together coupling of the invention, designated generally as 11.
  • the coupling is used to join two sections of pipe such as the sections represented by the opposing box pipe ends 13, 15 in Figure 2.
  • the coupling body has a first tapered end 17 and a second tapered end 19 which are joined together a respective inner extent 21 thereof.
  • Each of the tapered ends 17, 19 slopes inwardly from the inner extent 21 to an outer extent 23, 25 thereof to thereby form a respective mouth opening of the body, such as mouth opening
  • each of the first and second tapered end 17, 19 has a specially contoured exterior surface.
  • the exterior surface is made up of a plurality of of "helical spline wedges” such as wedges 29, 31 , 33 illustrated in Figure 1. These specially designed “wedges” are partly in the form of a thread and partly in the form of a spline.
  • Each of the wedges is oppositely tapered from an inner extent 35 to an outer extent 37 thereof, whereby the helical spline wedges form an alternating series of lands 39 and grooves 41 on the exterior surface of the body as viewed from the respective mouth openings 27.
  • the specially contoured exterior surfaces of the coupling 11 resemble a "spline" in that they form alternating lands and grooves 39, 41. They also resemble a spline in that the respective wedges 29, 31, 33 are arranged on the exterior surface of the coupling 11 along a dominant axis 43, the dominant axis being longitudinal or axial rather than helical, as in the case of a typical thread. Conversely, however, even though the wedges are aligned predominately along a longitudinal axis 43, as will be explained in greater detail, there is a radial component of movement during makeup of the pipe connection.
  • the first and second tapered ends 17, 19 of the coupling 11 are sized or shaped appropriately to be received on mating internal surfaces 45, 47 provided on the respective box ends of the two pipe sections 13, 15 to be joined.
  • an assembly force must be applied to the coupling 11 in order to form a connection between the two pipe sections 13, 15.
  • the assembly force causes the coupling 11 to rotate less than 360° before the ends 13, 15 are fully connected.
  • the assembly force causes the coupling to rotate less than 90°, and most preferably less than about 45° before the pipe ends are fully connected.
  • Figure 4 is a simplified representation which further illustrates the combined spline/thread nature of the helical spline wedges of the invention.
  • the wedge surfaces are acted upon by an assembly force causing the coupling to move primarily along a longitudinal or axial path of travel.
  • the dominate axis is normally helical.
  • the special helical spline wedges of the invention as compared to a normal thread form.
  • Figure 4 is intended to be a simplified representation of a thread form of a tubular connection.
  • the angle ⁇ is approximately 45°. For an angle generally less than almost 45°, more of a push connection is achieved. Where the angle ⁇ is greater than about 45°, more of a torque force connection results. In the case of ⁇ is equal to 0°, a pure spline connection results.
  • a selected coupling end 19 is first inserted approximately halfway into the mating pipe end 15.
  • the coupling is generally free stabbing until about the halfway point, at which resistance is encountered from the wedge lands and grooves making contact.
  • the lands and grooves contact first before the respective 49, 51 make contact.
  • the second pipe end 13 is then pushed in the direction of the first pipe end as with a hydraulic tool.
  • the coupling rotates approximately 36° radially during makeup before the pipe outer extents 53, 55 make contact. Contact between the pipe ends 53, 55 and engagement with the coupling 11 is achieved without any rotation or torque of the respective pipe ends 13, 15.
  • Figure 3 shows another version of the connection system of the invention in which the specially contoured surfaces on the coupling 12 and opposing pipe ends 14, 16 are essentially reversed. That is, the helical spline wedge surfaces 18, 20 on the coupling 12 are one the interior of the first and second tapered ends. Similarly, the respective opposing pipe ends to be joined 14, 16 are "pin" ends having specially contoured exterior helical spline wedge surfaces 22, 24.
  • the makeup of the connection is in other respects identical to that previously described.
  • Figure 5 illustrates another version of a push-together pipe assembly of the invention which is used for joining two pipe sections with only a partial rotation of one of the sections.
  • the pipe assembly shown in Figure 5 is made up of a first pipe 57 having a first tapered end 59 with an inner extent 61 and an outer extent (shown in phantom lines as 63).
  • the tapered end 59 slopes inwardly from the inner extent 61 to the outer extent 63 thereof to thereby form a respective mouth opening of the first pipe.
  • the first pipe tapered end 59 has a specially contoured engagement surface, the engagement surface being comprised of a plurality of helical spline wedges, each of which is oppositely tapered from an inner extent to an outer extent thereof in width, whereby the helical spline wedges form an alternating series of lands and grooves as viewed from the respective mouth openings.
  • the push-together pipe assembly of Figure 5 also includes a second pipe 65 having a specially contoured engagement surface on an outer extent thereof, the second pipe engagement surface being sized to be matingly engaged with the first pipe engagement surface, whereby the respective pipe ends may be joined by axial movement of one pipe relative to another.
  • the second pipe 65 has a "box" end with the specially contoured surfaces being on the interior of the pipe end adjacent the mouth opening.
  • the specially contoured surfaces on the first pipe end are on the exterior thereof so that it constitutes a "pin" end.
  • the helical spline wedges are arranged on the specially contoured surface of the selected pipe end along a dominant axis, the dominant axis being longitudinal rather than helical.
  • connection system allows two pipe sections to be joined with only a slight rotation of one pipe relative to the other. This can be particularly advantageous in applications such as construction, oil and gas and mining, where a slight rotation of one or both pipes being joined may be acceptable.
  • Such a connection system can be used advantageously for drive pipe, riser pipe, conduit and casing liners for oil and gas production, for example.
  • the connection system is relatively simple in design and economical to manufacture. Previous connections systems requiring welding of the pipe ends required on the order of five hours per connection where as the connection system of the invention can be made up in about five minutes or less.
  • the multiple wedge segments forming the specially contoured surfaces of the coupling assist in holding the opposing pipe ends together to keep them from inadvertently separating. That is, multiple wedge surfaces are present at the connection unlike a regular threaded connection in which the thread runs out at the outer extent of the pipe ends.
  • the additional contact area provides a more secure connection overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

La présente invention concerne un ensemble de tuyaux à raccord par pression permettant de raccorder deux extrémités de tuyaux. Une extrémité de tuyau comporte une surface extérieure spécialement profilée. L'autre extrémité de tuyau comporte une surface intérieure spécialement profilée correspondante. Chacune des surfaces profilées se compose d'une alternance de coins cannelés hélicoïdaux. Les coins se rétrécissent en sens contraire de leur extrémité intérieure à leur extrémité extérieure de façon que les coins cannelés hélicoïdaux forment une alternance de cloisons et de rainures lorsqu'on les regarde depuis les extrémités ouvertes correspondantes. Les deux extrémités de tuyaux opposées correspondent et s'emboîtent lorsqu'une extrémité de tuyau est poussée contre l'autre pendant l'assemblage, ce qui provoque une légère rotation d'un tuyau par rapport à l'autre.
PCT/US2007/020097 2006-09-28 2007-09-17 Ensemble de tuyaux à raccord par pression WO2008042105A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84777506P 2006-09-28 2006-09-28
US60/847,775 2006-09-28

Publications (2)

Publication Number Publication Date
WO2008042105A2 true WO2008042105A2 (fr) 2008-04-10
WO2008042105A3 WO2008042105A3 (fr) 2008-08-14

Family

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PCT/US2007/020097 WO2008042105A2 (fr) 2006-09-28 2007-09-17 Ensemble de tuyaux à raccord par pression

Country Status (1)

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WO (1) WO2008042105A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010031973A1 (de) * 2010-07-22 2012-01-26 Eads Deutschland Gmbh Luftleitungsrohr für Passagierversorgungseinheiten
US9370898B2 (en) 2010-11-11 2016-06-21 Joinlock Pty Ltd. Connecting method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469304A (en) * 1921-06-16 1923-10-02 New Departure Mfg Co Schaft coupling
US3032870A (en) * 1959-06-18 1962-05-08 North American Aviation Inc Brazed joint and fabrication method
US3476413A (en) * 1966-02-01 1969-11-04 Kobe Inc Friction-type joint with uniform wall thickness
US4697947A (en) * 1985-06-03 1987-10-06 Karl Bauer Spezialtiefbau Gmbh & Co. Kg Plug connection for boring tubes
US5474334A (en) * 1994-08-02 1995-12-12 Halliburton Company Coupling assembly
US5533825A (en) * 1994-11-14 1996-07-09 General Electric Company Parabolically helical spline shaft coupling
US6913293B1 (en) * 2002-12-05 2005-07-05 Pipelife Jet Stream Inc. Spiral spline pipe joint apparatus and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469304A (en) * 1921-06-16 1923-10-02 New Departure Mfg Co Schaft coupling
US3032870A (en) * 1959-06-18 1962-05-08 North American Aviation Inc Brazed joint and fabrication method
US3476413A (en) * 1966-02-01 1969-11-04 Kobe Inc Friction-type joint with uniform wall thickness
US4697947A (en) * 1985-06-03 1987-10-06 Karl Bauer Spezialtiefbau Gmbh & Co. Kg Plug connection for boring tubes
US5474334A (en) * 1994-08-02 1995-12-12 Halliburton Company Coupling assembly
US5533825A (en) * 1994-11-14 1996-07-09 General Electric Company Parabolically helical spline shaft coupling
US6913293B1 (en) * 2002-12-05 2005-07-05 Pipelife Jet Stream Inc. Spiral spline pipe joint apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010031973A1 (de) * 2010-07-22 2012-01-26 Eads Deutschland Gmbh Luftleitungsrohr für Passagierversorgungseinheiten
DE102010031973B4 (de) * 2010-07-22 2012-03-08 Eads Deutschland Gmbh Luftleitungsrohr für Passagierversorgungseinheiten
US9370898B2 (en) 2010-11-11 2016-06-21 Joinlock Pty Ltd. Connecting method

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