WO2016186514A1 - Seal and pipe carrier unit for a subsea pipe connection - Google Patents
Seal and pipe carrier unit for a subsea pipe connection Download PDFInfo
- Publication number
- WO2016186514A1 WO2016186514A1 PCT/NO2016/050094 NO2016050094W WO2016186514A1 WO 2016186514 A1 WO2016186514 A1 WO 2016186514A1 NO 2016050094 W NO2016050094 W NO 2016050094W WO 2016186514 A1 WO2016186514 A1 WO 2016186514A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- seal
- face
- nut
- pipes
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/005—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts comprising locking means for the threaded member
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
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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
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe
- F16L41/14—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe by screwing an intermediate part against the inside or outside of the wall
Definitions
- the invention relates to a pipe connection for sealingly connecting a first pipe and a second pipe which are provided, at their opposite end portions, with removable rings arranged in grooves provided in the peripheries of the pipes, the pipe connection being provided with a first nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the first pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and a second nut which is provided with an externally threaded portion, is arranged to encircle the end portion of the second pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, the nuts being in threaded engagement with each other and being arranged to press radial pipe-end faces of the pipes against an axially supporting portion of a seal and pipe carrier unit which is enclosed by the nuts.
- the invention also relates to a pipe connection for sealingly connecting a machined block and a pipe which is provided, at its end portion, with a removable ring arranged in a groove provided in the periphery of the pipe, the pipe connection being provided with a nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and a connecting socket which is fixed to said block and projects from a seal face encircling a port, is provided with an externally threaded portion and is arranged to encircle the end portion of the pipe, the nut and the connecting socket being in threaded engagement with each other and surrounding a seal and pipe carrier unit and being arranged to press a radial pipe-end face of the pipe against an axially supporting portion of the seal and pipe carrier unit and an end face of the seal and pipe carrier unit against said seal face.
- the invention relates to a method of sealingly connecting a first pipe and a second pipe or a machined block and a pipe by means of a pipe connection.
- a pipe connection For underwater use, there are requirements for double sealing and sealing against both external and internal pressures.
- a high standard of straightness is required in the assembly of flanges and pipes in such situations.
- welding high-pressure pipes in materials such as super duplex steel is demanding and, in many applications, weld-free connections are to be preferred for thick-walled pipes with high working pressure, in which the pipe connection is under load and may be subjected to pressure pulses and vibration.
- flange joints in which a rotatable flange has been fitted to a pipe end and mounts a pipe to an opposite flange or to a machined block is prior art.
- An advantage in relation to all-welded struc- tures is that the components can be disassembled. The flange rests against a locking ring, which lies in a machined groove on the pipe end, and when the flanges are made up, the pipe end is pressed against a seal element. Connecting flanges with bolts requires a high standard of correct assembly in order to get a straight connection and, normally, only certified personnel are allowed to make up the connection.
- WO 2009/144359 A1 discloses a high-pressure flange solution.
- US 4927192 A shows a pipe connector with internally and externally threaded nuts that are in engagement with each other, each nut abutting against a ring which is placed in a groove on the end of each one of two pipes that are to be connected to each other.
- the pipe ends When being tightened, the pipe ends are brought towards each other and pressed against a seal element between the pipe ends.
- US 4364517 A discloses a connector between a pipe and a block with an outer locking nut.
- WO0017548 A1 shows a connector with a locking nut and a seal- and pipe-holder.
- EP0231076 A1 discloses the use of a setscrew to lock the nut and sleeve in a pipe connector.
- the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art or at least provide a useful alternative to the prior art.
- a pipe connection provided with a seal and pipe carrier unit often referred to as a "seal carrier”, is provided, which, by means of primary and secondary seals, ensures double sealing of the pipe connection, that is to say prevents leakage at both internal and external positive pressures, and ensures the axial orientation and precise guidance of the pipe ends during make-up.
- the seals are arranged between pipe-end faces and an axially supporting portion of the seal and pipe carrier unit, and between the pipe periphery and a surrounding sleeve-shaped portion of the seal and pipe carrier unit, alternatively between a pipe-end face and an axially supporting portion of the seal and pipe carrier unit, between the pipe periphery and a surrounding sleeve-shaped portion of the seal and pipe carrier unit and between an end face of the seal and pipe carrier unit and a seal face en- circling a port on a machined block, for example a valve housing.
- the invention relates more specifically to a pipe connection for sealingly connecting a first pipe and a second pipe which are provided, at their opposite end portions, with removable rings arranged in grooves provided in the peripheries of the pipes, the pipe connection being provided with
- a first nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the first pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and
- a second nut which is provided with an externally threaded portion, is arranged to encircle the end portion of the second pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring,
- the nuts being in threaded engagement with each other and being arranged to press radial pipe-end faces of the pipes against an axially supporting portion of a seal and pipe carrier unit enclosed by the nuts, characterized by
- the axially supporting portion being provided with parallel abutment faces projecting radially inwards, which are each provided with a primary-seal groove provided with a primary seal arranged to sealingly abut against said pipe-end faces, and
- the invention relates more specifically to a pipe connection for sealingly con- necting a machined block and a pipe which is provided, in its end portion, with a removable ring arranged in a groove provided in the periphery of the pipe, the pipe connection being provided with a nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and
- a connecting socket which is fixed to said block and projects from a seal face encircling a port, is provided with an externally threaded portion and is arranged to encircle the end portion of the pipe,
- the nut and the connecting socket being in threaded engagement with each other and surrounding a seal and pipe carrier unit and being arranged to press a radial pipe-end face of the pipe against an axially supporting portion of the seal and pipe carrier unit and an end face of the seal and pipe carrier unit against said seal face, characterized by
- the axially supporting portion being provided with an abutment face projecting radially inwards, which is parallel to said end face and which is provided with a primary-seal groove provided with a primary seal arranged to abut sealingly against said pipe-end face or against said seal face, and
- a sleeve-shaped radially supporting portion which is provided, internally, with a first secondary-seal groove provided with a secondary seal arranged to abut sealingly against the periphery of the pipe, and
- said end face being provided with a second secondary-seal groove encircling the primary- seal groove of the end face and being provided with a secondary seal arranged to sealingly abut against said seal face.
- the primary seal may be a metal seal.
- the secondary seal may be an elastomeric seal.
- the secondary seal may be an elas- tomeric seal provided with at least one removable supporting ring.
- the nut that is provided with an internally threaded portion may be provided with at least one threaded radial bore arranged to receive a setscrew for locking the nut relative to the corresponding threaded portion.
- the invention relates more specifically to a method of sealingly connecting a first pipe and a second pipe or a machined block and a pipe by means of a pipe connection as described above, characterized by the method including the steps:
- the method may include the further step:
- Figure 1 shows a perspective sketch of a connection between two pipes formed of a pipe connection comprising a seal and pipe carrier unit according to the invention
- Figure 2 shows an axial section of the pipe connection according to figure 1 ;
- Figure 3 shows a perspective sketch of a nut with threaded holes for radially positioned setscrews
- Figure 4 shows a perspective sketch of a connection between a pipe and a machined block formed of a pipe connection comprising a seal and pipe carrier unit according to the invention.
- Figure 5 shows an axial section of the pipe connection according to figure 4.
- the reference numeral 1 indicates a pipe connection for sealingly connecting first and second pipes 2, 3.
- the pipe connection 1 is provided with a first nut 12 with an internally threaded portion 122, and a second nut 13 with an externally threaded portion 132.
- Said nuts 12, 13 have been passed over respective pipes 2 and 3, and are abutting with their shoulder portions 121 and 131 , respectively, against respective removable rings 4 which are fitted in machined grooves 22 and 32, respectively, in end portions 21 and 32, respectively, on the pipes 2, 3.
- the nuts 12, 13 are in threaded engagement with each other.
- a seal and pipe carrier unit 1 1 is positioned, encircled by the nuts 12, 13.
- a middle portion forms an axially supporting portion 1 1 1 with parallel abutment faces 1 1 a projecting radially inwards, each provided with a primary-seal groove 1 1 1 b.
- the primary-seal groove 1 1 1 b of the seal and pipe carrier unit 1 1 is arranged to receive a primary seal 14, typically in the form of a metal seal, arranged to abut against a pipe-end face 23, 33 of the adjacent pipe 2, 3.
- the secondary-seal groove 1 12b of the seal and pipe carrier unit 1 1 is arranged to receive a secondary seal 15, typically in the form of an elastomeric seal, shown here with associated supporting rings 151 , arranged to abut against the periphery of the surrounded pipe 2, 3.
- a variant 1 a of the pipe connection may be used to fix a pipe 2 to a machined block 5, for example a valve housing or a pump housing, by a nut 12, which abuts in an axially supporting manner against the removable ring 4 of the pipe 2, having been screwed in over a connecting socket 53 with an externally threaded portion 531 projecting from a seal face 52 surrounding a port 51 which communicates with a fluid passage in the block 5.
- the connect- ing socket 53 is shown attached to the block 5 by means of several fixing screws 532.
- a seal and pipe carrier unit 1 1 a is positioned, encircled by the nut 12 and the connecting socket 53.
- a sleeve-shaped radially supporting portion 1 12 extends axially, provided, internally, with a secondary-seal groove 1 12b.
- An end portion forms an axially supporting portion 1 1 1 with an abutment face 1 1 1 a projecting radially inwards and being parallel to an end face 1 1 1 c.
- Each of the abutment face 1 1 1 a and the end face 1 1 1 c is provided with a primary-seal groove 1 1 1 b.
- a second secondary-seal groove 1 12c has been arranged as well, encircling the primary-seal groove 1 1 1 b of the end face 1 1 1 c.
- the primary-seal grooves 1 1 1 b of the seal and pipe carrier unit 1 1 a are arranged to receive prima- ry seals 14, typically in the form of metal seals, arranged to abut against the pipe-end face 23 of the adjacent pipe 2 and against the seal face 52 of the machined block 5, respectively.
- the secondary-seal grooves 1 12b of the seal and pipe carrier unit 1 1 are arranged to receive secondary seals 15, typically in the form of elastomeric seals, shown here with associated supporting rings 151 , arranged to abut against the periphery of the surrounded pipe 2 and against the seal face 52 of the machined block 5.
- the pipe connection 1 is pulled together by the first nut 12 and the second nut 13 being screwed together and tightened to a moment, such that the primary seals 14 are sealing against internal positive pressure in the pipes 2, 3.
- the nut 12 is screwed in over the externally threaded connecting socket 53 when the pipe 2 is being fitted to the machined block 5, as is shown in figure 5.
- setscrews 16 may be screwed into threaded radial bores 124 in the (first) nut 12, as shown in figures 1 , 2, 4 and 5, so that the set screws 16 are pressing against the second nut 13 or the connecting socket 53, securing the (first) nut 12.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
A pipe connection (1) and a method for sealingly connecting pipes (2, 3) which, in their opposite end portions (21, 31), are provided with removable rings (4) arranged in grooves (22, 32) provided in the peripheries of the pipes (2, 3), the pipe connection (1) being provided with a first nut (12), which is provided with an internally threaded portion (122) and is arranged to encircle the end portion (21) of the first pipe (2) and has a shoulder portion (121) which may abut in an axially supporting manner against said ring (4), and a second nut (13), which is provided with an externally threaded portion (132) and is arranged to encircle the end portion (31) of the second pipe (3) and abut with a shoulder portion (131) in an axially supporting manner against said ring (4), and the nuts (12, 13) are in threaded engagement with each other and are arranged to press radial pipe-end faces (23, 33) of the pipes (2, 3) against an axially supporting portion (111) of a seal and pipe carrier unit (11) enclosed by the nuts (2, 3).
Description
SEAL AND PIPE CARRIER UNIT FOR A SUBSEA PIPE CONNECTION
The invention relates to a pipe connection for sealingly connecting a first pipe and a second pipe which are provided, at their opposite end portions, with removable rings arranged in grooves provided in the peripheries of the pipes, the pipe connection being provided with a first nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the first pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and a second nut which is provided with an externally threaded portion, is arranged to encircle the end portion of the second pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, the nuts being in threaded engagement with each other and being arranged to press radial pipe-end faces of the pipes against an axially supporting portion of a seal and pipe carrier unit which is enclosed by the nuts.
The invention also relates to a pipe connection for sealingly connecting a machined block and a pipe which is provided, at its end portion, with a removable ring arranged in a groove provided in the periphery of the pipe, the pipe connection being provided with a nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and a connecting socket which is fixed to said block and projects from a seal face encircling a port, is provided with an externally threaded portion and is arranged to encircle the end portion of the pipe, the nut and the connecting socket being in threaded engagement with each other and surrounding a seal and pipe carrier unit and being arranged to press a radial pipe-end face of the pipe against an axially supporting portion of the seal and pipe carrier unit and an end face of the seal and pipe carrier unit against said seal face.
Finally, the invention relates to a method of sealingly connecting a first pipe and a second pipe or a machined block and a pipe by means of a pipe connection. For underwater use, there are requirements for double sealing and sealing against both external and internal pressures. A high standard of straightness is required in the assembly of flanges and pipes in such situations.
Welding high-pressure pipes in materials such as super duplex steel is demanding and, in many applications, weld-free connections are to be preferred for thick-walled pipes with high working
pressure, in which the pipe connection is under load and may be subjected to pressure pulses and vibration.
Using flange joints in which a rotatable flange has been fitted to a pipe end and mounts a pipe to an opposite flange or to a machined block is prior art. An advantage in relation to all-welded struc- tures is that the components can be disassembled. The flange rests against a locking ring, which lies in a machined groove on the pipe end, and when the flanges are made up, the pipe end is pressed against a seal element. Connecting flanges with bolts requires a high standard of correct assembly in order to get a straight connection and, normally, only certified personnel are allowed to make up the connection. WO 2009/144359 A1 discloses a high-pressure flange solution. US 4927192 A shows a pipe connector with internally and externally threaded nuts that are in engagement with each other, each nut abutting against a ring which is placed in a groove on the end of each one of two pipes that are to be connected to each other. When being tightened, the pipe ends are brought towards each other and pressed against a seal element between the pipe ends.
US 4364517 A discloses a connector between a pipe and a block with an outer locking nut. WO0017548 A1 shows a connector with a locking nut and a seal- and pipe-holder.
EP0231076 A1 discloses the use of a setscrew to lock the nut and sleeve in a pipe connector.
The invention has for its object to remedy or reduce at least one of the drawbacks of the prior art or at least provide a useful alternative to the prior art.
The object is achieved according to the invention through the features that are specified in the de- scription below and in the claims that follow.
A pipe connection provided with a seal and pipe carrier unit, often referred to as a "seal carrier", is provided, which, by means of primary and secondary seals, ensures double sealing of the pipe connection, that is to say prevents leakage at both internal and external positive pressures, and ensures the axial orientation and precise guidance of the pipe ends during make-up. The seals are arranged between pipe-end faces and an axially supporting portion of the seal and pipe carrier unit, and between the pipe periphery and a surrounding sleeve-shaped portion of the seal and pipe carrier unit, alternatively between a pipe-end face and an axially supporting portion of the seal and pipe carrier unit, between the pipe periphery and a surrounding sleeve-shaped portion of the seal and pipe carrier unit and between an end face of the seal and pipe carrier unit and a seal face en- circling a port on a machined block, for example a valve housing.
The invention is defined by the independent claims. The dependent claims define advantageous embodiments of the invention.
In a first aspect, the invention relates more specifically to a pipe connection for sealingly connecting
a first pipe and a second pipe which are provided, at their opposite end portions, with removable rings arranged in grooves provided in the peripheries of the pipes, the pipe connection being provided with
a first nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the first pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and
a second nut which is provided with an externally threaded portion, is arranged to encircle the end portion of the second pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring,
the nuts being in threaded engagement with each other and being arranged to press radial pipe-end faces of the pipes against an axially supporting portion of a seal and pipe carrier unit enclosed by the nuts, characterized by
the axially supporting portion being provided with parallel abutment faces projecting radially inwards, which are each provided with a primary-seal groove provided with a primary seal arranged to sealingly abut against said pipe-end faces, and
there being, extending axially in both directions from the axially supporting portion, sleeve- shaped radially supporting portions which are provided, internally, with respective secondary-seal grooves with secondary seals arranged to abut sealingly against the peripheries of the pipes.
In a second aspect, the invention relates more specifically to a pipe connection for sealingly con- necting a machined block and a pipe which is provided, in its end portion, with a removable ring arranged in a groove provided in the periphery of the pipe, the pipe connection being provided with a nut which is provided with an internally threaded portion, is arranged to encircle the end portion of the pipe and is provided with a shoulder portion which may abut in an axially supporting manner against said ring, and
a connecting socket which is fixed to said block and projects from a seal face encircling a port, is provided with an externally threaded portion and is arranged to encircle the end portion of the pipe,
the nut and the connecting socket being in threaded engagement with each other and surrounding a seal and pipe carrier unit and being arranged to press a radial pipe-end face of the pipe against an axially supporting portion of the seal and pipe carrier unit and an end face of the seal and pipe carrier unit against said seal face, characterized by
the axially supporting portion being provided with an abutment face projecting radially inwards, which is parallel to said end face and which is provided with a primary-seal groove provided with a primary seal arranged to abut sealingly against said pipe-end face or against said seal face, and
there being, extending axially from the axially supporting portion, a sleeve-shaped radially supporting portion which is provided, internally, with a first secondary-seal groove provided with a secondary seal arranged to abut sealingly against the periphery of the pipe, and
said end face being provided with a second secondary-seal groove encircling the primary-
seal groove of the end face and being provided with a secondary seal arranged to sealingly abut against said seal face.
The primary seal may be a metal seal.
The secondary seal may be an elastomeric seal. Alternatively, the secondary seal may be an elas- tomeric seal provided with at least one removable supporting ring.
The nut that is provided with an internally threaded portion may be provided with at least one threaded radial bore arranged to receive a setscrew for locking the nut relative to the corresponding threaded portion.
In a third aspect, the invention relates more specifically to a method of sealingly connecting a first pipe and a second pipe or a machined block and a pipe by means of a pipe connection as described above, characterized by the method including the steps:
placing a seal and pipe carrier unit with associated primary and secondary seals between pipe-end faces of adjacent pipes, possibly between the pipe-end face of a pipe and a seal face encircling a port on an adjacent block;
- connecting a nut to a corresponding threaded portion in the pipe connection;
pulling the pipe connection together by means of the nut in order thereby to bring said seals into sealing abutment against the pipe-end faces of the pipes, or against the pipe-end face of the pipe and the seal face.
The method may include the further step:
- locking the nut to the corresponding threaded portion with at least one setscrew which is arranged in a threaded radial bore in the nut.
In what follows, an example of a preferred embodiment and method is described, which is visualized in the accompanying drawings, in which:
Figure 1 shows a perspective sketch of a connection between two pipes formed of a pipe connection comprising a seal and pipe carrier unit according to the invention;
Figure 2 shows an axial section of the pipe connection according to figure 1 ;
Figure 3 shows a perspective sketch of a nut with threaded holes for radially positioned setscrews;
Figure 4 shows a perspective sketch of a connection between a pipe and a machined block formed of a pipe connection comprising a seal and pipe carrier unit according to the invention; and
Figure 5 shows an axial section of the pipe connection according to figure 4.
Reference is first made to figures 1 and 2, in which the reference numeral 1 indicates a pipe connection for sealingly connecting first and second pipes 2, 3. The pipe connection 1 is provided with a first nut 12 with an internally threaded portion 122, and a second nut 13 with an externally threaded portion 132. Said nuts 12, 13 have been passed over respective pipes 2 and 3, and are abutting with their shoulder portions 121 and 131 , respectively, against respective removable rings 4 which are fitted in machined grooves 22 and 32, respectively, in end portions 21 and 32, respectively, on the pipes 2, 3. The nuts 12, 13 are in threaded engagement with each other.
In the pipe connection 1 for connecting two pipes 2, 3, a seal and pipe carrier unit 1 1 is positioned, encircled by the nuts 12, 13. A middle portion forms an axially supporting portion 1 1 1 with parallel abutment faces 1 1 a projecting radially inwards, each provided with a primary-seal groove 1 1 1 b. Extending axially in both directions from the middle portion, there are sleeve-shaped radially supporting portions 1 12, 1 12a, which are each provided, internally, with a secondary-seal groove 1 12b.
The primary-seal groove 1 1 1 b of the seal and pipe carrier unit 1 1 is arranged to receive a primary seal 14, typically in the form of a metal seal, arranged to abut against a pipe-end face 23, 33 of the adjacent pipe 2, 3.
The secondary-seal groove 1 12b of the seal and pipe carrier unit 1 1 is arranged to receive a secondary seal 15, typically in the form of an elastomeric seal, shown here with associated supporting rings 151 , arranged to abut against the periphery of the surrounded pipe 2, 3. As appears from figures 4 and 5, a variant 1 a of the pipe connection may be used to fix a pipe 2 to a machined block 5, for example a valve housing or a pump housing, by a nut 12, which abuts in an axially supporting manner against the removable ring 4 of the pipe 2, having been screwed in over a connecting socket 53 with an externally threaded portion 531 projecting from a seal face 52 surrounding a port 51 which communicates with a fluid passage in the block 5. Here, the connect- ing socket 53 is shown attached to the block 5 by means of several fixing screws 532.
In the pipe connection 1 a for the connection of the pipe 2 and the machined block 5, a seal and pipe carrier unit 1 1 a is positioned, encircled by the nut 12 and the connecting socket 53. From an end portion forming an axially supporting portion 1 1 1 , a sleeve-shaped radially supporting portion 1 12 extends axially, provided, internally, with a secondary-seal groove 1 12b. An end portion forms an axially supporting portion 1 1 1 with an abutment face 1 1 1 a projecting radially inwards and being parallel to an end face 1 1 1 c. Each of the abutment face 1 1 1 a and the end face 1 1 1 c is provided with a primary-seal groove 1 1 1 b. On the end face 1 1 1 c, a second secondary-seal groove 1 12c has been arranged as well, encircling the primary-seal groove 1 1 1 b of the end face 1 1 1 c.
The primary-seal grooves 1 1 1 b of the seal and pipe carrier unit 1 1 a are arranged to receive prima- ry seals 14, typically in the form of metal seals, arranged to abut against the pipe-end face 23 of
the adjacent pipe 2 and against the seal face 52 of the machined block 5, respectively.
The secondary-seal grooves 1 12b of the seal and pipe carrier unit 1 1 are arranged to receive secondary seals 15, typically in the form of elastomeric seals, shown here with associated supporting rings 151 , arranged to abut against the periphery of the surrounded pipe 2 and against the seal face 52 of the machined block 5.
The pipe connection 1 is pulled together by the first nut 12 and the second nut 13 being screwed together and tightened to a moment, such that the primary seals 14 are sealing against internal positive pressure in the pipes 2, 3. Correspondingly, the nut 12 is screwed in over the externally threaded connecting socket 53 when the pipe 2 is being fitted to the machined block 5, as is shown in figure 5.
After the pipe connection 1 , 1 a has been made up to the desired moment, setscrews 16 may be screwed into threaded radial bores 124 in the (first) nut 12, as shown in figures 1 , 2, 4 and 5, so that the set screws 16 are pressing against the second nut 13 or the connecting socket 53, securing the (first) nut 12. It should be noted that all the above-mentioned embodiments illustrate the invention, but do not limit it, and persons skilled in the art will be able to construct many alternative embodiments without departing from the scope of the attached claims. In the claims, reference numbers in parentheses are not to be regarded as restrictive.
The use of the verb "to comprise" and its different forms does not exclude the presence of ele- ments or steps that are not mentioned in the claims. The indefinite article "a" or "an" before an element does not exclude the presence of several such elements.
The fact that some features are indicated in mutually different dependent claims does not indicate that a combination of these features cannot be used with advantage.
Claims
C l a i m s
A pipe connection (1 ) for sealingly connecting first and second pipes (2, 3) which, at their opposite end portions (21 , 31), are provided with removable rings (4) arranged in grooves (22, 32) provided in the peripheries of the pipes (2, 3), the pipe connection (1) being provided with
a first nut (12) which is provided with an internally threaded portion (122), is arranged to encircle the end portion (21) of the first pipe (2) and is provided with a shoulder portion (121) which may abut in an axially supporting manner against said ring (4), and
a second nut (13) which is provided with an externally threaded portion (132), is arranged to encircle the end portion (31) of the second pipe (3) and is provided with a shoulder portion (131) which may abut in an axially supporting manner against said ring (4),
the nuts (12, 13) being in threaded engagement with each other and being arranged to press radial pipe-end faces (23, 33) of the pipes (2, 3) against an axially supporting portion (1 1 1) of a seal and pipe carrier unit (1 1 ) enclosed by the nuts (12, 13), c h a r a c t e r i z e d i n that
the axially supporting portion (1 1 1) is provided with parallel abutment faces (1 1 1 a) projecting radially inwards, which are each provided with a primary-seal groove (1 1 1 b) provided with a primary seal (14) arranged to sealingly abut against said pipe- end faces (23, 33), and,
extending axially in both directions from the axially supporting portion (1 1 1), there are sleeve-shaped, radially supporting portions (1 12, 1 12a) which are provided, internally, with respective secondary-seal grooves (1 12b) provided with secondary seals (15) arranged to sealingly abut against the peripheries of the pipes (2, 3).
A pipe connection (1 a) for sealingly connecting a machined block (5) and a pipe (2) which is provided, in its end portion (21), with a removable ring (4) arranged in a groove (22) provided in the periphery of the pipe (2), the pipe connection (1 a) being provided with
a nut (12) which is provided with an internally threaded portion (122), is arranged to encircle the end portion (21) of the pipe (2) and is provided with a shoulder portion (121) which may abut in an axially supporting manner against said ring (4), and a connecting socket (53) which is fixed to said block (5) and projects from a seal face (52) encircling a port (51), is provided with an externally threaded portion (531) and is arranged to encircle the end portion (21) of the pipe (2),
the nut (2) and the connecting socket (53) being in threaded engagement with each other and enclosing a seal and pipe carrier unit (1 1 a) and being arranged to press a radial pipe-end face (23) of the pipe (2) against an axially supporting portion (1 1 1) of
the seal and pipe carrier unit (11 a) and an end face (111c) of the seal and pipe carrier unit (11a) against said seal face (52), c h a r a c t e r i z e d i n that the axially supporting portion (111) is provided with an abutment face (111a) projecting radially inwards and being parallel to said end face (111c), and each of the end face (111c) and the abutment face (111a) is provided with a primary-seal groove (111b) provided with a primary seal (14) arranged to abut sealingly against said pipe- end face (23) and against said seal face (52), respectively, and,
extending axially from the axially supporting portion (111), there is a sleeve- shaped radially supporting portion (112) which is provided, internally, with a first secondary-seal groove (112b) provided with a secondary seal (15) arranged to abut sealingly against the periphery of the pipe
(2), and
said end face (111c) is provided with a second secondary-seal groove (112c) encircling the primary-seal groove (111b) of the end face (111c) and being provided with a secondary seal (15) arranged to sealingly abut against said seal face (52).
3. The pipe connection (1 , 1a) according to claim 1 or 2, wherein the primary seal (14) is a metal seal.
4. The pipe connection (1 , 1a) according to claim 1 or 2, wherein the secondary seal (15) is an elastomeric seal.
5. The pipe connection (1 , 1a) according to claim 1 or 2, wherein the secondary seal (15) is an elastomeric seal provided with at least one supporting ring (151).
6. The pipe connection (1, 1a) according to claim 1 or 2, wherein the (first) nut (12) is provided with at least one threaded radial bore (124) arranged to receive a set screw (16) for locking the nut (12) relative to a corresponding threaded portion (132, 531).
7. A method of sealingly connecting first and second pipes (2, 3) or a machined block (5) and a pipe (2) by means of a pipe connection (1 1a) according to claim 1 or 2, c h a r a c t e r i z e d i n that the method comprises the steps:
placing a seal and pipe carrier unit (11, 11a) with associated primary and secondary seals (14, 15) between pipe-end faces (23, 33) of adjacent pipes (2, 3), possibly between the pipe-end face (23) of a pipe (2) and a seal face (52) encircling a port (51) of an adjacent block (5);
connecting a nut (12) to a corresponding threaded portion (132, 531) in the pipe connection (1 , 1a);
pulling the pipe connection (1, 1a) together by means of the nut (12) in order thereby to bring said seals (14, 15) into sealing abutment against the pipe-end faces (23, 33) of the pipes (2, 3), or against the pipe-end face (23) of the pipe (2) and the seal face (52).
8. The method according to claim 7, wherein the method includes the further step: locking the nut (12) to the corresponding threaded portion (132, 531) with at least one set screw (16) which is arranged in a threaded radial bore in the nut (12).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16796817.1A EP3298315B1 (en) | 2015-05-20 | 2016-05-19 | Seal and pipe carrier unit for a subsea pipe connection |
| US15/575,268 US20180142814A1 (en) | 2015-05-20 | 2016-05-19 | Seal and pipe carrier unit for a subsea pipe connection |
| AU2016264709A AU2016264709B2 (en) | 2015-05-20 | 2016-05-19 | Seal and pipe carrier unit for a subsea pipe connection |
| BR112017024670-8A BR112017024670B1 (en) | 2015-05-20 | 2016-05-19 | TUBE CONNECTION TO SEALLY CONNECT FIRST AND SECOND PIPES, TUBE CONNECTION TO SEALLY CONNECT A MACHINED BLOCK AND A TUBE, AND METHOD FOR SEALING CONNECTING FIRST AND SECOND PIPES OR A MACHINED BLOCK AND A TUBE TUBE CONNECTION |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20150628 | 2015-05-20 | ||
| NO20150628 | 2015-05-20 | ||
| NO20160834 | 2016-05-18 | ||
| NO20160834A NO340578B1 (en) | 2015-05-20 | 2016-05-18 | Seal and pipe control unit for underwater pipe connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016186514A1 true WO2016186514A1 (en) | 2016-11-24 |
Family
ID=57320795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NO2016/050094 Ceased WO2016186514A1 (en) | 2015-05-20 | 2016-05-19 | Seal and pipe carrier unit for a subsea pipe connection |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2016186514A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI910216B (en) * | 2020-09-18 | 2026-01-01 | 日商島野股份有限公司 | Hydraulic hose coupler |
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|---|---|---|---|---|
| GB588902A (en) * | 1945-03-09 | 1947-06-05 | Tube Patents Ltd | Improvements in or relating to a method of and means for coupling together pipes, tubular bodies and the like |
| GB836825A (en) * | 1955-10-28 | 1960-06-09 | Ciba Ltd | Improvements in or relating to pipe connections |
| GB2010428A (en) * | 1977-12-19 | 1979-06-27 | Sundholm G | Connection for transition from a cutting ring joint or similar to a flange joint |
| US4364517A (en) * | 1980-07-11 | 1982-12-21 | Etheridge Robert E | Hopper cleaner attachment |
| GB2172072A (en) * | 1985-03-04 | 1986-09-10 | Cajon Co | Coded pipe coupling |
| US5145219A (en) * | 1990-08-01 | 1992-09-08 | Cajon Company | Tube coupling with gasket retainer |
| JPH08100875A (en) * | 1994-09-30 | 1996-04-16 | Nec Corp | Pipe joint |
| US5782500A (en) * | 1995-05-26 | 1998-07-21 | Mate; Robert James | Passageway aligned coupling and process |
| DE10065654A1 (en) * | 2000-12-29 | 2002-07-18 | Ct Therm Abgassystemtechnik Gm | Exhaust pipe is made up of two pipe sections with outer collars, short connecting pipe with ends shaped to fit against collars mounted between them and locking sleeves with cooperating threads which fasten sections together |
| US20090026716A1 (en) * | 2007-07-27 | 2009-01-29 | Air Products And Chemicals, Inc. | Soft insert gasket |
| WO2009094245A2 (en) * | 2008-01-22 | 2009-07-30 | Cameron International Corporation | Connection methods and systems |
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2016
- 2016-05-19 WO PCT/NO2016/050094 patent/WO2016186514A1/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB588902A (en) * | 1945-03-09 | 1947-06-05 | Tube Patents Ltd | Improvements in or relating to a method of and means for coupling together pipes, tubular bodies and the like |
| GB836825A (en) * | 1955-10-28 | 1960-06-09 | Ciba Ltd | Improvements in or relating to pipe connections |
| GB2010428A (en) * | 1977-12-19 | 1979-06-27 | Sundholm G | Connection for transition from a cutting ring joint or similar to a flange joint |
| US4364517A (en) * | 1980-07-11 | 1982-12-21 | Etheridge Robert E | Hopper cleaner attachment |
| GB2172072A (en) * | 1985-03-04 | 1986-09-10 | Cajon Co | Coded pipe coupling |
| US5145219A (en) * | 1990-08-01 | 1992-09-08 | Cajon Company | Tube coupling with gasket retainer |
| JPH08100875A (en) * | 1994-09-30 | 1996-04-16 | Nec Corp | Pipe joint |
| US5782500A (en) * | 1995-05-26 | 1998-07-21 | Mate; Robert James | Passageway aligned coupling and process |
| DE10065654A1 (en) * | 2000-12-29 | 2002-07-18 | Ct Therm Abgassystemtechnik Gm | Exhaust pipe is made up of two pipe sections with outer collars, short connecting pipe with ends shaped to fit against collars mounted between them and locking sleeves with cooperating threads which fasten sections together |
| US20090026716A1 (en) * | 2007-07-27 | 2009-01-29 | Air Products And Chemicals, Inc. | Soft insert gasket |
| WO2009094245A2 (en) * | 2008-01-22 | 2009-07-30 | Cameron International Corporation | Connection methods and systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI910216B (en) * | 2020-09-18 | 2026-01-01 | 日商島野股份有限公司 | Hydraulic hose coupler |
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