EP1015805A1 - Method of rehabilitating an existing pipeline - Google Patents
Method of rehabilitating an existing pipelineInfo
- Publication number
- EP1015805A1 EP1015805A1 EP98922520A EP98922520A EP1015805A1 EP 1015805 A1 EP1015805 A1 EP 1015805A1 EP 98922520 A EP98922520 A EP 98922520A EP 98922520 A EP98922520 A EP 98922520A EP 1015805 A1 EP1015805 A1 EP 1015805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liner
- pipeline
- bladder
- rehabilitating
- feeding
- 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.)
- Withdrawn
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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
Definitions
- Figure 1 is a longitudinal sectional view of a pipeline being rehabilitated in
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pipe Accessories (AREA)
Abstract
The method is related to the rehabilitation of an existing pipeline in-situ, where the pipeline has a first end (1) and a second end (4), the method including the following steps: (a) forming a tubular liner (6) of a generally absorbent material; (b) feeding at least one expandable bladder (3) into the liner (6), the bladder having an open end (14) and a sealed end (5); (c) impregnating the liner (6) with a cold curable resin; (d) coating an external surface of the liner (6) and/or the internal surface of the pipeline to be rehabilitated with a water resistance adhesive coating; (e) feeding the liner into the first end (1) of the pipeline together with its associated bladder (3); (f) inserting a rod (2) into the bladder (3) to engage the sealed end (5); (g) forcing the liner (6) and the associated bladder (3) toward the second end (4) of the pipeline from the first end (1) such that the open end (14) and the sealed end (5) of the bladder (3) are adjacent the first and second ends (1, 4) respectively; (h) inflating the bladder (3) from the open end (14) with a gaseous fluid to force the liner (6) against the internal wall of the pipeline; and (i) maintaining the inflation until the resin impregnated liner has cured.
Description
TITLE: METHOD OF REHABILITATING AN EXISTING PIPELINE
Technical Field
The present invention relates to a method of rehabilitating an existing pipeline
in-situ.
Background Art
A method of rehabilitating an existing pipeline is disclosed in WO97/08487, the
contents of which are hereby incorporated in their entirety by way of cross reference.
Disclosure of the Invention
According to a first aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ, said pipeline having a first end and second
end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin;
d) feeding said liner into the first end of the pipeline together with its
associated bladder;
e) inserting a rod into the bladder to engage the sealed end;
f) forcing said liner and the associated bladder toward the second end of the
pipeline by pushing a rod into the pipeline from the first end such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to
the first and second end respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
According to a second aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ, said pipeline having a first end and second
end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin;
d) feeding said liner into the first end of the pipeline together with its
associated bladder;
e) inserting a rod between the liner and the internal surface of the pipeline so
as to engage a slit disposed adjacent an end of the liner;
f) forcing said liner and the associated bladder toward the second end of the
pipeline by pushing a rod into the pipeline from the first end such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to
the first and second end respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
According to a third aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ, said pipeline having a first end and a second
end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin;
d) threading a cord having a third end and a fourth end through said pipeline
such that the fourth end extends from the second end of the pipeline;
e) attaching the third end of said cord to said liner and/or bladder;
f) drawing said fourth end through said second end for progressing
said liner through the pipeline together with its associated bladder such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to the
first and second ends respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
According to a fourth aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ, said pipeline including a main line to be
rehabilitated and a secondary line branching from said main line, the method including
the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) determining a junction position along the main line at which said secondary
line branches from said main line;
d) cutting a hole in said liner at a position corresponding to the junction
position;
e) impregnating said liner with a cold curable resin;
f) feeding said liner into the pipeline together with its associated bladder such
that said hole is aligned with said secondary line;
g) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
According to a fifth aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) feeding at least one cable or conduit between said bladder and liner;
d) impregnating said liner with a cold curable resin;
e) feeding said liner into the pipeline together with its associated bladder;
f) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
g) maintaining said inflation until the resin impregnated liner has cured,
thereby encasing said cable or conduit within said resin.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
According to another aspect of the invention there is provided a method for
rehabilitating an existing pipeline in-situ including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) impregnating said liner with a cold curable resin;
d) coating an external surface of said liner and/or an internal surface of the
pipeline to be rehabilitated with a water resistant adhesive coating;
e) feeding said liner into the pipeline together with its associated bladder;
f) feeding at least one cable or conduit between said liner and said pipeline;
g) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
Preferably, the method also includes the step of coating an external surface of
said liner and/or an internal surface of the pipeline to be rehabilitated with a water
resistant adhesive coating.
Brief Description of the Drawings
A preferred embodiment of the invention will now be described, by way of
example only, with reference to the accompanying drawings in which:
Figure 1 is a longitudinal sectional view of a pipeline being rehabilitated in
according with the first aspect of the invention;
Figure 2 is a longitudinal sectional view of a pipeline being rehabilitated in
accordance with the second aspect of the invention;
Figure 3 is a longitudinal sectional view of a pipeline being rehabilitated in
accordance with a third aspect of the invention;
Figure 4 is a longitudinal section view of a pipeline being rehabilitated in
accordance with the fourth aspect of the invention;
Figure 5 is a transverse sectional view taken through line 5-5 of figure 4;
Figure 6 is a longitudinal sectional view of a pipeline being rehabilitated in
accordance with the fifth aspect of the invention;
Figure 7 is a transverse sectional view taken through line 7-7 of figure 6;
Figures 8a and 8b are transverse cross sectional views of a pipeline being
rehabilitated in accordance with another aspect of the invention.
Modes for Carrying out the Invention
A method according to a preferred embodiment of the invention will now be
described with reference to figure 1. More particularly, the method is related to the
rehabilitation of an existing pipeline in-situ, said pipeline having a first end 1 and a
second end 4, said method including the following steps:
a) forming a tubular liner 6 of a generally absorbent material;
b) feeding at least one expandable bladder 3 into said liner 6, the bladder
having an open end 14 and a sealed end 5;
c) impregnating said liner 6 with a cold curable resin;
d) coating an external surface of said liner 6 and/or the internal surface of the
pipeline to be rehabilitated with a water resistance adhesive coating;
e) feeding said liner into the first end 1 of the pipeline together with its
associated bladder 3;
f) inserting a rod 2 into the bladder 3 to engage the sealed end 5;
g) forcing the liner 6 and the associated bladder 3 toward the second end 4 of
the pipeline from the first end 1 such that the open end 14 and the sealed end 5 of the
bladder 3 are adjacent the first and second ends 1 and 4 respectively;
h) inflating said bladder 3 from said open end 14 with a gaseous fluid to force
the liner 6 against the internal wall of the pipeline; and
i) maintaining said inflation until the resin impregnated liner has cured.
In an alternative embodiment, rod 2 is engaged with the slit 9 before the liner 6
is fed into the pipeline. Optionally, the liner 6 may be folded longitudinally into
halves, as shown in figure 8 and the rod 2 may be affixed to the liner 6 by means of
adhesive tape 20 positioned so as to span the gap between the two halves of the liner.
The liner 6 is then fed into the pipeline by means of pushing the rod 2. Once the
bladder 3 is subsequently inflated, the folded liner 6 will expand, thereby breaking or
dislodging the tape and allowing the rod 2 to be removed from the pipeline before the
resin cures.
The above described aspects of the invention advantageously allow for
rehabilitation of a pipeline having a first end 1 which is generally accessible and a
second end 4 which is generally inaccessible.
Figure 2 depicts a method for rehabilitating an existing pipeline in-situ, said
pipeline having a first end 1 which is generally inaccessible and a second end 4 to
which only limited access is available, for example via a secondary pipeline 16 of
smaller diameter than that of the pipeline to be rehabilitated. The method is similar to
that described above except a rope 7 (or alternatively a cable or the like) is utilised to
force the liner 6 and bladder 3 toward the second end 4 rather than the rod 2.
According to this method, the rope 7 is threaded through the pipeline and attached to
the distal end of the liner 6 and/or the bladder 3. The liner 6 is then fed into the first
end 1 of the pipeline together with its associated bladder 3 such that the sealed end 5
of the bladder faces the second end 4 of the pipeline. The liner 6 and associated
bladder 3 is then fed through the pipeline by means of pulling on the rope 7 from the
second end 4.
Although rope 7 is shown attached to bladder 3, in other embodiments it is
attached, and preferably removably, to liner 6.
Figure 3 shows a method for rehabilitating existing pipelines in-situ which is
suited to pipelines having junctions. The prior art method for dealing with this
situation was to firstly allow a continuous resin impregnated liner to cure inside the
pipeline. A remote control lateral or a branch cutter was then driven up the pipeline to
the junction and a hole was cut out to allow fluid to flow through the branch line into
the main line. Alternatively, the junction was excavated and cut by hand.
The method shown in figure 3 significantly improves upon the prior art
procedure. The pipeline includes a mainline 8 to be rehabilitated and a secondary line
10 branching from the main line 8. The method includes the following steps:
a) forming a tubular liner 6 of a generally absorbent material;
b) feeding at least one expandable bladder 3 into said liner 6;
c) determining a position 9 along the main line 8 at which said secondary line
10 branches from said main line 8;
d) cutting a hole 17 in the liner 6 at a position corresponding the position at
which said secondary branches from said main line;
e) impregnating said liner 6 with a cold curable resin;
f) coating an external surface of said liner 6 and/or the internal surface of the
main pipeline to be rehabilitated 8 with a water resistant adhesive coating;
g) feeding said liner 6 into the pipeline together with its associated bladder 3
such that said hole 17 is aligned with said secondary pipeline 10;
h) inflating said bladder 3 with a gaseous fluid to force the liner 6 against the
internal wall of said main pipeline 8; and
i) maintaining said inflation until the resin impregnated liner has cured.
This method advantageously avoids the need to take further steps after curing of
the resin to cut a hole at the junction position.
Figures 4 to 7 show methods that may be employed if it is desired to install a
cable, conduit or the like along the rehabilitated pipeline. This may be particularly
advantageous, for example, in regions where it is desired to connect additional
telecommunications lines, such as optical cables, without causing additional overhead
wiring.
Figures 4 and 5 show a method for rehabilitating an existing pipeline in-situ
wherein a cable or conduit 11 is fed between the bladder 3 and the liner 6. The
pipeline is then rehabilitated in the standard manner and inflation of the bladder 3
causes the cable or conduit to "sink" into the resin impregnated liner. Once the resin
impregnated liner 6 has cured, the cable or conduit 11 is encased within the resin.
This ensures that the cable or conduit 11 does not obstruct flow along the pipeliner
and therefore does not contribute to blockages. The cable or conduit 11 is preferably
positioned along the length of the pipe-line so as not to obstruct any junctions that
may branch from the main line.
Figures 6 and 7 depict a method for rehabilitating an existing pipeline in-situ
wherein at a cable or conduit 11 is fed between the liner 6 and the internal surface 12
of the pipeline. Once the liner 6 has cured, the cable or conduit 11 is at least partially
encased within resin which exudes from the liner 6 and within the water resistant
adhesive which is coated onto the external surface of the liner 6.
Although the invention has been described with reference to specific examples,
it would be appreciated by those skilled in the art that the invention may be embodied
in many other forms. For example, it will be appreciated that some of the steps of the
methods disclosed in this specification may be taken in a different offer to that in
which they have been listed.
Claims
1. A method for rehabilitating an existing pipeline in-situ, said pipeline having a
first end and second end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin;
d) feeding said liner into the first end of the pipeline together with its
associated bladder;
e) inserting a rod into the bladder to engage the sealed end;
f) forcing said liner and the associated bladder toward the second end of the
pipeline by pushing a rod into the pipeline from the first end such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to
the first and second end respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
2. A method for rehabilitating an existing pipeline in-situ, said pipeline having a
first end and second end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin; d) feeding said liner into the first end of the pipeline together with its
associated bladder;
e) inserting a rod between the liner and the internal surface of the pipeline so
as to engage a slit disposed adjacent an end of the liner;
f) forcing said liner and the associated bladder toward the second end of the
pipeline by pushing a rod into the pipeline from the first end such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to
the first and second end respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
3. A method for rehabilitating an existing pipeline in-situ according to claim 2
wherein the rod is engaged with the slit before the liner is fed into the pipeline.
4. A method for rehabilitating an existing pipeline in-situ according to claim 2
wherein, prior to being fed into the pipeline, the liner is folded longitudinally into
halves and the rod is affixed to the liner by means of adhesive tape positioned so as to
span the gap between the two halves of the liner.
5. A method for rehabilitating an existing pipeline in-situ according to claim 4
wherein, once the liner is fed into the pipeline by means of pushing the rod, the
bladder is inflated causing the folded liner to expand, thereby breaking or dislodging
the adhesive tape so as to allow for withdrawal of the rod.
6. A method for rehabilitating an existing pipeline in-situ according to any one of
the proceeding claims wherein said first end of the pipeline is generally accessible and
said second end of the pipeline is generally inaccessible.
7. A method for rehabilitating an existing pipeline in-situ, said pipeline having a
first end and a second end, said method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner, said bladder having
an open end and a sealed end;
c) impregnating said liner with a cold curable resin;
d) threading a cord having a third end and a fourth end through said pipeline
such that the fourth end extends from the second end of the pipeline;
e) attaching the third end of said cord to said liner and/or bladder;
f) drawing said fourth end through said second end for progressing
said liner through the pipeline together with its associated bladder such that the open
end and the sealed end of the bladder are respectively disposed at or adjacent to the
first and second ends respectively;
g) inflating said bladder from said open end with a gaseous fluid to force the
liner against the internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
8. A method for rehabilitating an existing pipeline in-situ according to claim 7,
wherein said cord is a rope or a cable.
9. A method for rehabilitating an existing pipeline in-situ, said pipeline including a
main line to be rehabilitated and a secondary line branching from said main line, the
method including the following steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) determining a junction position along the main line at which said secondary
line branches from said main line;
d) cutting a hole in said liner at a position corresponding to the junction
position;
e) impregnating said liner with a cold curable resin;
f) feeding said liner into the pipeline together with its associated bladder such
that said hole is aligned with said secondary line;
g) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
10. A method for rehabilitating an existing pipeline in-situ including the following
steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) feeding at least one cable or conduit between said bladder and liner;
d) impregnating said liner with a cold curable resin;
e) feeding said liner into the pipeline together with its associated bladder; f) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
g) maintaining said inflation until the resin impregnated liner has cured,
thereby encasing said cable or conduit within said resin.
11. A method for rehabilitating an existing pipeline in-situ including the following
steps:
a) forming a tubular liner of a generally absorbent material;
b) feeding at least one expandable bladder into said liner;
c) impregnating said liner with a cold curable resin;
d) coating an external surface of said liner and/or an internal surface of the
pipeline to be rehabilitated with a water resistant adhesive coating;
e) feeding said liner into the pipeline together with its associated bladder;
f) feeding at least one cable or conduit between said liner and said pipeline;
g) inflating said bladder with a gaseous fluid to force the liner against the
internal wall of said pipeline; and
h) maintaining said inflation until the resin impregnated liner has cured.
12. A method for rehabilitating an existing pipeline in-situ according to claim 10
or 11 wherein said cable is an optical fibre telecommunications cable.
13. A method for rehabilitating an existing pipeline in-situ according to any one of
claim 10 to 12 and 15 wherein said cable or conduit is positioned along the length of
the pipeline so as not to obstruct junctions branching from the mainline.
14. A method according to any one of claims 1, 2, 7, 9 or 11 including the step of
coating an external surface of said liner and/or an internal surface of the pipeline to be
rehabilitated with a water resistant adhesive coating.
15. A method of rehabilitating an existing pipeline in-situ substantially as here
described with reference to any one of the accompanying drawings.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPO6954A AUPO695497A0 (en) | 1997-05-26 | 1997-05-26 | End of line pipeliner |
| AUPO695497 | 1997-05-26 | ||
| PCT/AU1998/000388 WO1998054509A1 (en) | 1997-05-26 | 1998-05-26 | Method of rehabilitating an existing pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1015805A1 true EP1015805A1 (en) | 2000-07-05 |
| EP1015805A4 EP1015805A4 (en) | 2003-04-02 |
Family
ID=3801245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98922520A Withdrawn EP1015805A4 (en) | 1997-05-26 | 1998-05-26 | Method of rehabilitating an existing pipeline |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1015805A4 (en) |
| JP (1) | JP2002507157A (en) |
| AU (1) | AUPO695497A0 (en) |
| NZ (1) | NZ501983A (en) |
| WO (1) | WO1998054509A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9908602D0 (en) * | 1999-04-15 | 1999-06-09 | Northumbria Lyonnaise Technolo | Rehabilitation of water supply pipes |
| FR2807137B1 (en) * | 2000-03-28 | 2002-06-07 | Setha Soc D Etudes De Travaux | PROCESS FOR IN SITU REHABILITATION OF LEAD CONNECTIONS WHICH DOESN'T REQUIRE AN EXCAVATION AT THE SIDE OF THE TAP OF THE SAME |
| AU2002951189A0 (en) * | 2002-09-04 | 2002-09-19 | Terence Dominic Gillam | An inflatable pipe test probe |
| JP4560370B2 (en) * | 2004-10-26 | 2010-10-13 | 株式会社 シーシーエス | Branch pipe lining material and branch pipe lining method |
| US7270150B2 (en) | 2005-06-14 | 2007-09-18 | Warren Environmental, Inc. | Method of lining a pipeline |
| WO2015161212A1 (en) | 2014-04-17 | 2015-10-22 | Daniel Warren | Large diameter pipe lining and repair |
| CN111396630B (en) * | 2020-03-18 | 2021-12-17 | 北京通成达水务建设有限公司 | Anti-floating structure of pipeline and construction method of pipeline |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006300A1 (en) * | 1994-08-19 | 1996-02-29 | Lmk Enterprises | Method and apparatus for repairing a pipeline |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273605A (en) * | 1974-01-21 | 1981-06-16 | Ross Louis A R | Internal lining and sealing of hollow ducts |
| AU4541179A (en) * | 1978-04-05 | 1979-10-18 | Daniel Cahuzac | Sheath for forming and internal lining for a conduit |
| US5034180A (en) * | 1988-04-13 | 1991-07-23 | Nupipe, Inc. | Method for installing a substantially rigid thermoplastic pipe in an existing pipeline |
| EP0635112A4 (en) * | 1992-03-20 | 1995-04-12 | Barry Bros Spec Services | Apparatus for use in repairing a pipeline and method for carrying out such repairs. |
| DE4302266A1 (en) * | 1993-01-28 | 1994-08-04 | Bayer Ag | Two-component polyurethane coating compositions and their use |
| JP2528429B2 (en) * | 1993-08-31 | 1996-08-28 | 株式会社湘南合成樹脂製作所 | Branch pipe lining method |
| GB9319832D0 (en) * | 1993-09-25 | 1993-11-10 | Insituform Technologies Inc | Improvements relating to the lining of pipelines and passageways |
| US5490744A (en) * | 1993-12-08 | 1996-02-13 | Mcneil; Ronald A. | Method and apparatus for inflating and curing a resin impregnated manhole liner |
| AU694172B2 (en) * | 1994-04-11 | 1998-07-16 | Cant, Richard Samuel | Lining material |
-
1997
- 1997-05-26 AU AUPO6954A patent/AUPO695497A0/en not_active Abandoned
-
1998
- 1998-05-26 JP JP50001099A patent/JP2002507157A/en active Pending
- 1998-05-26 WO PCT/AU1998/000388 patent/WO1998054509A1/en not_active Application Discontinuation
- 1998-05-26 EP EP98922520A patent/EP1015805A4/en not_active Withdrawn
- 1998-05-26 NZ NZ501983A patent/NZ501983A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006300A1 (en) * | 1994-08-19 | 1996-02-29 | Lmk Enterprises | Method and apparatus for repairing a pipeline |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO9854509A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| NZ501983A (en) | 2001-03-30 |
| WO1998054509A1 (en) | 1998-12-03 |
| EP1015805A4 (en) | 2003-04-02 |
| AUPO695497A0 (en) | 1997-06-12 |
| JP2002507157A (en) | 2002-03-05 |
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