WO1991004826A1 - Method and apparatus for making an underwater weld seam between endwise positioned tubular elements, like pipes - Google Patents
Method and apparatus for making an underwater weld seam between endwise positioned tubular elements, like pipes Download PDFInfo
- Publication number
- WO1991004826A1 WO1991004826A1 PCT/FI1989/000217 FI8900217W WO9104826A1 WO 1991004826 A1 WO1991004826 A1 WO 1991004826A1 FI 8900217 W FI8900217 W FI 8900217W WO 9104826 A1 WO9104826 A1 WO 9104826A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- welding
- casing
- tubular elements
- pipes
- yarn
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000004880 explosion Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000001307 helium Substances 0.000 claims description 10
- 229910052734 helium Inorganic materials 0.000 claims description 10
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- -1 acryl Chemical group 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- 229910052729 chemical element Inorganic materials 0.000 claims 1
- 239000002360 explosive Substances 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- 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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/26—Repairing or joining pipes on or under water
Definitions
- the present invention relates to underwater welding, more presicely to a method according to the preamble of the accompanying claim 1 and to an apparatus according to the pre ⁇ amble of the accompanying claim 2 for making an underwater weld seam between endwise positioned tubular elements, like pipes, to joint them endwise together.
- the invention Is descriped in the following by one advantage ⁇ ous embodiment thereof with reference to the accompanying drawing in which the figure shows a longitudinal cross section of the underwater welding apparatus according to the advanta ⁇ geous embodiment of the present invention as placed around two ; endwise positioned pipe ends .
- the apparatus according to this advantageous embodiment pre ⁇ sented in the figure include a casing 1,3 for capsuling water ⁇ tightly the joint zone including an open welding groove 22 de ⁇ fined by the the opposite beveled edges of the ends of the pipes 13 to be joined; an inner plug body 16,17,18 for plugg ⁇ ing watertightly both of the pipes 13 to be joined with a dis ⁇ tance from their open ends on both sides of the welding groove 22; ejector means 20 for removing water both from the interior of the casing 1,3 and from the interiors of the plugged ends of the pipes 13 before starting the welding process: and a welding unit 2 arranged along the welding groove 22 moveably inside the casing 1,3 for accoplishing a weld seam into the welding groove 22. Further the appartus is provided with a grinding unit 15 for removing continiously during the welding process the slag and porosity from surface of the weld seam.
- the casing in this embodiment is composed of a stationary outer frame 1 and a rotating inner frame 3.
- the stationary outer frame part is preferably transparent and made most pre ⁇ ferably of acryl.
- the outer frame 1 is placed outside the pipes 13 to be joined and radially apart thereof to surround the joint zone.
- the outer frame 1 is provided with pressure gaskets 7 at its both ends. Gaskets 7 are pressurized by a suitable medium to an essentiallly higher pressure than the pressure of the sur ⁇ rounding water.
- the apparatus include also a welding unit 2 fastened to a rotating, preferably also transparent, inner frame 3.
- a rotating, preferably also transparent, inner frame 3 For rotating the inner frame 3 and for moving the tip of the weld ⁇ ing unit 2 along the welding groove 22 the inner frame 3 is provided with a tooth ring 31 and inside the outer frame 1 is fastened a hydraulic motor 10 which is provided with a tooth gear 32 which transmits the motive power to the tooth ring 31.
- the optionlly adapted grinding unit 14 is fastened to the in ⁇ ner rotating frame part 3, preferably to an opposite orienta ⁇ tion in respect to the welding unit 2, and is preferably com ⁇ posed of grinding disc rotated by an electric motor.
- the inner plug body 16,17,18 to be placed inside the pipes 13 past the joint zone for plugging the pipes 13 watertightly is composed of
- the diameter of the fragile discs 17 are preferably dimensioned a li ' ttle smaller than the inner dia ⁇ meter of the pipe 13.
- the welding unit 2 is acombined MIG- and TIG welding unit hereinafter referred as welding unit and comprises as can be seen from the figure - a welding tip 23 including a central channel for the welding yarn 24 and a ringlike nozzle for the shield gas, - means, preferably pair of electrically operated rollers 25 arranged inside a first protective casing 26 for continious drawing the welding yarn 24 from a reel 8 into the first protective casing 26 and for continious feeding the welding yarn 24 from the first protective casing 26 through the tip 23 into the welding groove 22,
- the shield gas is used helium and as the welding yarn a wolfram containing weld ⁇ ing yarn.
- the wolfram yarn reel 8 is closed inside a second protective casing 27 and the helium tube 9 connects on one hand the helium container 11 to the second protective casing 27 and on the other hand the second protective casing 27 to the first protective casing 26, whereby wolfram yarn reel 8 and wolfram yarn 24 are continiously surrounded by the helium gas and feed bath of the wolfram yarn 24 up to the tip 23 is defined by the helium tube 9.
- the plugs 16,17,18 are get broken after the welding process when the weld seam is ready.
- the disc-like parts 17 of the plug body are made of fragile material, preferably of class and/or plastics, and provided each with remote controlled explosives 14 arranged in each disc-like part 17 circumferentially with constant distan ⁇ ce apart from each other.
- the remnants of the plug bodies can easily be removed from the interior of jointed pipes 13, for instance by pumping water through the jointed pipes 13.
- a pipe joint using the apparatus according to the invention happens in the following way: a) The casing 1,3 is pulled onto the end of the first pipe 13 and one half of the plug 16,17,18 is pushed inside the end of the first pipe 13, b) the end of the second pipe 13 is pushed onto the plug half extending from the end of the first pipe 13, whereby the pipes are aligned endwise and the their end edges define the welding groove there between, ⁇ ) the casing is pulled backwards past the joint zone and the pressure gaskets are pressurized so that the joint zone is to ⁇ tally capsuled, d) the casing is emptyed from the water and also the inner pressure is reduced by means of the ejector 21 whereafter the joint zone is sealed both outwards and inwards, e) the hydraulic motor rotating the inner frame 3 and welding unit 2 is operated and at the same the welding current is con ⁇ nected to the welding unit, f) after the welding is carried .out the over pressures of gas ⁇ kets 7 are released and the casing is pulled along
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to a method and an apparatus for making an underwater weld seam between endwise positioned pipes, the apparatus including: a casing (1, 3) for capsuling watertightly the welding groove (22) between the opposite end edges of the pipes (13); an inner plug body (16, 17, 18) for plugging both of the pipes (13); means (20) for removing water from the casing (1, 3); and a welding unit (2) arranged inside the casing (1, 3). According to the invention the casing to be placed outside the pipes (13) is composed of a stationary outer frame (1) and of a rotating inner frame (3) provided with the welding unit (2), the outer frame (1) being provided with gasket means (7) for sealing the same onto the pipes (13) and with means (20) for removing water form the casing and for reducing the inner pressure of the casing (1, 3). Further according to the invention the plug body (16, 17, 18) to be placed inside the pipes (13) is composed of an intermediate body (16) and of end bodies (17, 18) to be pressed watertightly against the inner surfaces of the pipes (13), the end bodies being made at least partially of fragile material, which will get broken by means of explosion.
Description
Method and apparatus for making an underwater weld seam between endwise positioned tubular elements, like pipes.
The present invention relates to underwater welding, more presicely to a method according to the preamble of the accompanying claim 1 and to an apparatus according to the pre¬ amble of the accompanying claim 2 for making an underwater weld seam between endwise positioned tubular elements, like pipes, to joint them endwise together.
In this kind of a previously known apparatus is used as plug means metal discs supported with an intermediate bar apart from each other and dimensioned to fit with a push adaptation inside the tubular elements. The disadvantage is the difficul¬ ty to remove the fast stuck plug after welding process. For removing the plug is used so called "pig" which is shot through the pipe against the plug - often happens that the plug can not be removed at all and the weld seam must then be opened and pipes rejoined. Because underwater welding is very expensive all kinds of re-operations are by no means desired. In the previously known apparatus is also used as welding unit a MIG-welding unit which is very sensitive for humidity whereby the weld seam becomes porous and slaggy and welding results do not fullfill the quality demands raised by the classification institutes.
The main object of the present invention is to achieve an im¬ proved apparatus for making underwater weld seams to joint tu¬ bular elements like pipes together to form a pipe line. An¬ other object of the present invention is to improve welding quality and to eliminate disadvantages relating to the previ¬ ously known welding apparatus for accomplishing underwater pipe lines. A third object of the present invention is to speed up and facilitate underwater pipe joints both to elimi¬ nate the previously necessary use of shootable "big" .
SUBSTITUTE SHEET
These objects have been achieved by the method and by the apparatus descriped above, the essential features of which have been descriped in the accompanying claims.
The invention Is descriped in the following by one advantage¬ ous embodiment thereof with reference to the accompanying drawing in which the figure shows a longitudinal cross section of the underwater welding apparatus according to the advanta¬ geous embodiment of the present invention as placed around two ; endwise positioned pipe ends .
The apparatus according to this advantageous embodiment pre¬ sented in the figure include a casing 1,3 for capsuling water¬ tightly the joint zone including an open welding groove 22 de¬ fined by the the opposite beveled edges of the ends of the pipes 13 to be joined; an inner plug body 16,17,18 for plugg¬ ing watertightly both of the pipes 13 to be joined with a dis¬ tance from their open ends on both sides of the welding groove 22; ejector means 20 for removing water both from the interior of the casing 1,3 and from the interiors of the plugged ends of the pipes 13 before starting the welding process: and a welding unit 2 arranged along the welding groove 22 moveably inside the casing 1,3 for accoplishing a weld seam into the welding groove 22. Further the appartus is provided with a grinding unit 15 for removing continiously during the welding process the slag and porosity from surface of the weld seam.
The casing in this embodiment is composed of a stationary outer frame 1 and a rotating inner frame 3. The stationary outer frame part is preferably transparent and made most pre¬ ferably of acryl. The outer frame 1 is placed outside the pipes 13 to be joined and radially apart thereof to surround the joint zone. For achieving a watertight contact between the outer frame part 1 and the outer peripheries of the pipes 13 the outer frame 1 is provided with pressure gaskets 7 at its
both ends. Gaskets 7 are pressurized by a suitable medium to an essentiallly higher pressure than the pressure of the sur¬ rounding water.
As can be seen from the figure the apparatus according to this advantageous embodiment include also a welding unit 2 fastened to a rotating, preferably also transparent, inner frame 3. For rotating the inner frame 3 and for moving the tip of the weld¬ ing unit 2 along the welding groove 22 the inner frame 3 is provided with a tooth ring 31 and inside the outer frame 1 is fastened a hydraulic motor 10 which is provided with a tooth gear 32 which transmits the motive power to the tooth ring 31. The optionlly adapted grinding unit 14 is fastened to the in¬ ner rotating frame part 3, preferably to an opposite orienta¬ tion in respect to the welding unit 2, and is preferably com¬ posed of grinding disc rotated by an electric motor.
The inner plug body 16,17,18 to be placed inside the pipes 13 past the joint zone for plugging the pipes 13 watertightly is composed of
- intermediate body 16 the outer diameter of which is essenti¬ ally smaller than the inner diameter of the pipes 13 to be joined and of
- end bodies 17,18 which are pressed watertightly against the inner surfaces of the pipes 13 to be joined, whereby is formed from surrounding water mass isolated ring¬ like hollow space inside the pipes 13 to joined between the end bodies 17,18 of the plug body and around the intermediate body 16, said space being through the welding groove 22 open into the casing 1,3.
According to the advantageous embodiment the intermediate body is composed preferably of a rubber billow 16 and each of the end bodies include two by means of explosion fragile disc ele¬ ments 17, preferably made of class of plastics. The fragile discs at each end body are connected to each other by means of
a bellow-tube gasket 18 preferably made of rubber. The bellow gas-kets will collapse and they will be pressed tightly against the inner peripheries of the pipes 13 to be joined when there exist a pressure difference over the end body 17,18 of the plug. The pressure difference is created most preferably according to the present invention by means of the above men-tioned ejector means 20 which are in connection through the wall of the outer frame of the casing 1,3 inside the casing 1,3 and via the open welding groove 22 into the ringlike hollow space between the end bodies 17,18 of the plug.
For facilitating the placing of the plug inside the pipes and fpr the creation of a pressure difference over the end body 17,18 of the plug the diameter of the fragile discs 17 are preferably dimensioned a li'ttle smaller than the inner dia¬ meter of the pipe 13.
For creating proper circumstances for the welding the water inside the casing 1,3 and the pipes 13 to be joined is removed at least to a level under the pipes 13 at the same time pres¬ sure inside the casing 1,3 is reduced in respect to the pres¬ sure of water outside the casing, whereby is formed a pressure difference over the end bodies 17,18 of the plug. These steps are carried out by means of the above mentioned ejector means 20 preferably so that water is pumped inside a water pipe 21 past an ejector out flow nozzle extending into the water pipe 21. Hence is created inside the casing 1,3 suction influence which will remove water from the casing 1,3 and will reduce pressure inside the casing 1,3.
According to the preferred embodiment the welding unit 2 is acombined MIG- and TIG welding unit hereinafter referred as welding unit and comprises as can be seen from the figure - a welding tip 23 including a central channel for the welding yarn 24 and a ringlike nozzle for the shield gas,
- means, preferably pair of electrically operated rollers 25 arranged inside a first protective casing 26 for continious drawing the welding yarn 24 from a reel 8 into the first protective casing 26 and for continious feeding the welding yarn 24 from the first protective casing 26 through the tip 23 into the welding groove 22,
- shield gas container 11 and a shield gas tube 9 for feeding the shield gas through the nozzle in the tip 23 into the welding groove 22. ;
According to the advantageous embodibent as the shield gas is used helium and as the welding yarn a wolfram containing weld¬ ing yarn. The wolfram yarn reel 8 is closed inside a second protective casing 27 and the helium tube 9 connects on one hand the helium container 11 to the second protective casing 27 and on the other hand the second protective casing 27 to the first protective casing 26, whereby wolfram yarn reel 8 and wolfram yarn 24 are continiously surrounded by the helium gas and feed bath of the wolfram yarn 24 up to the tip 23 is defined by the helium tube 9.
For conducting welding current there is fastened a current conducting rail 4 to the inner wall of the outer frame 1 and tip part 23 of the welding unit 2 is provided with a contact element 29 which slides along the rail 4 in connection there¬ with while the inner frame 3 rotates the welding unit 2 around the joint zone. For conducting the welding current further to the welding yarn 24 it is advantageous to use either a pair of conducting rollers or a pair of spring loaded conducting strips one of which is in electrically connected by a current cable to the contact element 29 and between which the welding yarn 24 is led into the welding groove 22.
According to the invention the plugs 16,17,18 are get broken after the welding process when the weld seam is ready. For this purpose the disc-like parts 17 of the plug body are made
of fragile material, preferably of class and/or plastics, and provided each with remote controlled explosives 14 arranged in each disc-like part 17 circumferentially with constant distan¬ ce apart from each other. When broken the remnants of the plug bodies can easily be removed from the interior of jointed pipes 13, for instance by pumping water through the jointed pipes 13.
A pipe joint using the apparatus according to the invention happens in the following way: a) The casing 1,3 is pulled onto the end of the first pipe 13 and one half of the plug 16,17,18 is pushed inside the end of the first pipe 13, b) the end of the second pipe 13 is pushed onto the plug half extending from the end of the first pipe 13, whereby the pipes are aligned endwise and the their end edges define the welding groove there between, σ) the casing is pulled backwards past the joint zone and the pressure gaskets are pressurized so that the joint zone is to¬ tally capsuled, d) the casing is emptyed from the water and also the inner pressure is reduced by means of the ejector 21 whereafter the joint zone is sealed both outwards and inwards, e) the hydraulic motor rotating the inner frame 3 and welding unit 2 is operated and at the same the welding current is con¬ nected to the welding unit, f) after the welding is carried .out the over pressures of gas¬ kets 7 are released and the casing is pulled along the pipe line forwards," and the remote controlled explosives 14 exist¬ ing in the plugs are exploded and the remnants of the plugs are removed from the pipe line preferably by neans of water flow.
The invetiqn was descriped above by one advantageous embodi¬ ment. This do not restrict the invention but the invention can be modified widely within the accompanying claims.
Claims
1. Method for making an underwater weld seam between endwise positioned tubular elements, like pipes, to joint them endwise together, in which method a joint zone including an open weld¬ ing groove (22) between the opposite end edges of tubular elements (13) is capsuled watertightly from outside by means of a casing (1,3) and plugged from inside by means of an inner plug body (16,17,18) on both sides of the joint zone, and in which method water is removed atleast from the interiors of the casing (1,3) and the plugged ends of tubular elements
(13); whereafter by means of a welding unit (2) arranged in¬ side the casing (1,3) is made the weld seam between said end edges of the tubular elements (13), characterized in that the inner plug body (16,17,18) to be placed inside the tubular elements (13) past the joint zone is composed of intermediate body (16) and of end bodies (17,18) atleast said end bodies (17,18) being made atleast partially of fragile material, which are get broken by means of explosion for removing said plug body from the interior of the tubular elements (13) after the weld seam is made therebetween.
2. Apparatus for making an underwater weld seam between end¬ wise positioned tubular elements, like pipes, to joint them endwise together, the apparatus including a casing (1,3) for capsuling watertightly the joint zone including an open weld¬ ing groove (22) between the opposite ends edges of tubular elements (13); an inner plug body (16,17,18) for plugging watertightly both of the tubular elements (13) on both sides of the joint zone; means (20) for atleast removing water from the interiors of the casing (1,3) and the plugged ends of tu¬ bular ele-ments (13); and a welding unit (2) arranged inside the casing (1,3) for making the weld seam, characterized in that the casing to be placed outside the tubular elements ( 13) is composed of a stationary outer frame (1) and of a rotating inner rame (3) provided with the welding unit (2), the outer frame (1) being provided with gasket means (7) to be pressed watertightly against the outer peripheries of the tubular ele¬ ments (13) and with means (20) for removing water from the in¬ terior of the casing and for reducing the inner pressure of the casing (1,3), and that the inner plug body (16,17,18) to be placed inside the tubular elements (13) past the joint zone is composed of intermediate body (16) the outer diameter of which is essentially smaller tha the inner diameter of the tubular elements (13), and of end bodies (17,18) to be pressed watertightly against the inner surfaces of the tubular ele¬ ments (13), the end bodies being made atleast partially of fragile material, which will get broken by means of explosion.
3. An apparatus according to the claim 2, characterized in that the stationary outer frame (1) is transparent and made of class, acryl or the like material.
4. An apparatus according to the claim 2, characterized in that the gaskets (7) are pressure gasket which for accomplish¬ ing the watertight sealing are pressurized by a suitable medi¬ um to an essentiallly higher pressure than the pressure of the surrounding water.
5. An apparatus according to claim 2 or 3, characterized in that for rotating the inner frame (3) and for moving the tip
(23) of the welding unit (2) along the welding groove (22) the inner frame (3) is provided with a tooth ring (31) and inside the outer frame (1) is fastened a hydraulic motor (10) which is provided with a tooth gear (32) to transmit the motive power to the tooth ring (31).
6. An apparatus according to anyone of the claims 2...5, cha¬ racterized in that the intermediate body of the plug (16,17, 18) is composed of a rubber billow 16 and that the end bodies include each two by means of explosion fragile disc elements (17), preferably made of class and/or plastics connected to each other by means of a bellow gasket (18), preferably made of rubber.
7. An apparatus according to the claim 6, characterized in that the bellow gasket (18) is by collapsing pressed tightly against the inner periphery of the tubular element (13) when a pressure difference exists over the end body 17,18 of the plug.
8. An apparatus according to anyone of the claims 2...7, cha¬ racterized in that welding unit (2) is a combined MIG- and TIG welding unit and comprises: a welding tip (23) including a central channel for the welding yarn (24) and a ringlike nozzle for the shield gas; means, preferably pair of electri¬ cally operated rollers (25) arranged inside a first protective casing (26) for continious drawing the welding yarn (24) from a reel (8) and for continious feeding the welding yarn (24) from the first protective casing (26) through the tip (23) in¬ to the welding groove (22); and shield gas container (11) and a shield gas tube (9) for feeding the shield gas through the nozzle in the tip (23) into the welding groove (22).
9. An apparatus according to the claim 8, characterized in that the shield gas is helium, that the welding yarn is a wolfram containing welding yarn, that the welding yarn reel
(8) is closed into a second protective casing (27), and that the helium tube (9 ) connects on one hand the helium container (11) to the second protective casing (27) and on the other hand the second protective casing (27) to the first protective casing (26), whereby wolfram yarn reel (8) and wolfram yarn (24) are continiously surrounded by the helium gas and feed bath of the wolfram yarn (24) up to the tip (23) is defined by the helium tube (9) .
10. An apparatus according to anyone of the claims 2...9, characterized in that for conducting welding current there is fastened a current conducting rail (4) to the inner wall of the outer frame (1) and tip (23) of the welding unit (2) is provided with a contact element (28) which slides along the rail (4) while the inner frame (3) rotates the welding unit (2) around the joint zone along the welding groove (22).
11. An apparatus according to anyone of the claims 2...10, characterized in that the disc-like parts (17) of the plug body are made of fragile material, preferably class and/or plastics, and are provided each with remote controlled ex¬ plosives (14) arranged in each disc-like part (17), preferably circumferentially with constant distance apart from each other.
12. An apparatus as claimed in claim 2 and substantially as herein described with reference to the example referred to in the accompanying drawing.
13. A method as claimed in claim 1 and substantially as herein described with reference to the example referred to in the accompanying drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI8900187 | 1989-09-28 | ||
| FIPCT/FI89/00187 | 1989-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1991004826A1 true WO1991004826A1 (en) | 1991-04-18 |
Family
ID=8556471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FI1989/000217 WO1991004826A1 (en) | 1989-09-28 | 1989-11-30 | Method and apparatus for making an underwater weld seam between endwise positioned tubular elements, like pipes |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU4642489A (en) |
| WO (1) | WO1991004826A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355626C (en) * | 2003-04-25 | 2007-12-19 | 北京石油化工学院 | 'cabin inside cabin' type working space for welding subwater pipeline in dry mode and under normal pressure |
| US20080142569A1 (en) * | 2004-07-02 | 2008-06-19 | Jan Olav Berge | Remote-Controlled Joining System |
| WO2009130091A1 (en) * | 2008-04-22 | 2009-10-29 | Technip France Sa | Method of and apparatus for sealing underwater pipes using a plug and a sealer; welding unit for such apparatus |
| CN103507109A (en) * | 2013-10-11 | 2014-01-15 | 上海利策科技股份有限公司 | Underwater dry type cutting cabin and application method thereof |
| CN108994423A (en) * | 2018-09-21 | 2018-12-14 | 北京石油化工学院 | A kind of no submersible submarine pipeline remote operating welding maintenance of equipment and method |
| CN113319428A (en) * | 2021-08-04 | 2021-08-31 | 山东辛丁技术有限公司 | Submarine pipeline welding device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3578233A (en) * | 1968-07-11 | 1971-05-11 | Shell Oil Co | Apparatus for remotely joining underwater pipelines |
| US4302652A (en) * | 1975-07-28 | 1981-11-24 | Compagnie Francaise Des Petroles | Method of welding the ends of submerged pipes by sleeve abutment |
-
1989
- 1989-11-30 WO PCT/FI1989/000217 patent/WO1991004826A1/en unknown
- 1989-11-30 AU AU46424/89A patent/AU4642489A/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3578233A (en) * | 1968-07-11 | 1971-05-11 | Shell Oil Co | Apparatus for remotely joining underwater pipelines |
| US4302652A (en) * | 1975-07-28 | 1981-11-24 | Compagnie Francaise Des Petroles | Method of welding the ends of submerged pipes by sleeve abutment |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355626C (en) * | 2003-04-25 | 2007-12-19 | 北京石油化工学院 | 'cabin inside cabin' type working space for welding subwater pipeline in dry mode and under normal pressure |
| US20080142569A1 (en) * | 2004-07-02 | 2008-06-19 | Jan Olav Berge | Remote-Controlled Joining System |
| US8708216B2 (en) * | 2004-07-02 | 2014-04-29 | Statoil Petroleum As | Remote-controlled joining system |
| WO2009130091A1 (en) * | 2008-04-22 | 2009-10-29 | Technip France Sa | Method of and apparatus for sealing underwater pipes using a plug and a sealer; welding unit for such apparatus |
| CN103507109A (en) * | 2013-10-11 | 2014-01-15 | 上海利策科技股份有限公司 | Underwater dry type cutting cabin and application method thereof |
| CN108994423A (en) * | 2018-09-21 | 2018-12-14 | 北京石油化工学院 | A kind of no submersible submarine pipeline remote operating welding maintenance of equipment and method |
| CN113319428A (en) * | 2021-08-04 | 2021-08-31 | 山东辛丁技术有限公司 | Submarine pipeline welding device |
| CN113319428B (en) * | 2021-08-04 | 2021-10-29 | 山东辛丁技术有限公司 | Submarine pipeline welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU4642489A (en) | 1991-04-28 |
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