GB2358449A - Improvements in and relating to pipe removal/replacement - Google Patents
Improvements in and relating to pipe removal/replacement Download PDFInfo
- Publication number
- GB2358449A GB2358449A GB0025204A GB0025204A GB2358449A GB 2358449 A GB2358449 A GB 2358449A GB 0025204 A GB0025204 A GB 0025204A GB 0025204 A GB0025204 A GB 0025204A GB 2358449 A GB2358449 A GB 2358449A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- resin
- composite
- elongate member
- expansion device
- 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- Withdrawn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
- 229920005989 resin Polymers 0.000 claims abstract description 70
- 239000011347 resin Substances 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 38
- 239000004033 plastic Substances 0.000 claims abstract description 34
- 229920003023 plastic Polymers 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 238000009412 basement excavation Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000805 composite resin Substances 0.000 claims description 2
- 230000002250 progressing effect Effects 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- XDXHAEQXIBQUEZ-UHFFFAOYSA-N Ropinirole hydrochloride Chemical compound Cl.CCCN(CCC)CCC1=CC=CC2=C1CC(=O)N2 XDXHAEQXIBQUEZ-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
- E21B7/30—Enlarging drilled holes, e.g. by counterboring without earth removal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/007—Fishing for or freeing objects in boreholes or wells fishing tools with means for attaching comprising fusing or sticking
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A method and apparatus for removal and replacement of pipes such as underground pipes is disclosed. In particular, the method and apparatus is used for the removal of lead water supply pipe and, if required, its replacement with a plastics water supply pipe. According to the present invention a method of removing a buried pipe 5 from the ground 10 comprises: <SL> <LI>(i) injecting a curable resin 15 into the pipe 5 so as to at least partly fill the pipe 5 with resin; <LI>(ii) allowing or causing the resin 15 to cure; and <LI>(iii) applying a tensile load to one end of the resin 15 pipe 5 composite whereby the resin 15 pipe 5 composite is pulled from the ground 10 in a generally axial direction. </SL>
Description
2358449 IMPROVEMENTS IN AND RELATING TO PIPE REMOVAL/R PLACEMENT
Field of Invention
This invention relates to a method and apparatus for removal and/or replacement of pipes such as underground pipes, and particularly, though not exclusively a method and apparatus for removal of a lead water supply pipe and, if required, its replacement with a plastics water supply pipe.
Backaround of Invention
Large numbers of older properties, particularly domestic residences, in the UK have potable water supplied via lead pipe extending from a water main, usually extending along a footpath or roadway to a property via an external stop tap, which pipe is regarded as a potential health hazard and which is currently countered by phosphatising the water supply.
- However, with an increasing need driven by legislation to cease the use of lead pipe, plastics pipe of suitable grade is being used as an alternative, and whilst from the installation viewpoint, running a plastic pipe from a water main to a property and leaving the lead pipe in situ is the simplest procedure, lead has a not unsubstantial scrap value if only it could be retrieved economically.
Trying to recover lead pipe by open cut is not 2S economical, as the direction and depth of the pipe is largely unknown and is variable.
2 Pulling lead pipe from the ground is not feasiblEI:' U( to the minimal tensile strength of lead, and one prop,b a to recover buried lead pipe by pulling was to pass a s e' wire along the pipe having spaced-apart cones to engagEt! hE pipe interior. However, this system has not found w IdE acceptance.
Furthermore, a standard feature in domestic wi4 eT supplies is the provision of an outside stop tap, e.g, at im depth. Not only is there a cost factor in the provi:plor.
and installation of a stop tap, but such external Stop tZL S are a source of many leakage losses, apart from their i Lpe being highly infrequent, e.g. every decade or so.
Yet another proposal is to leave the lead pipe in I;-- litu and to line it with a thin tube of polyethylene. Thi. s is not a straightforward technique as beads, defects, joil stop taps etc all interrupt the process, whilst punct4i -_s I or tears in the polyethylene, which re-introduce the hea- tb hazard, are undetected.
Object of Invention An object of at least one aspect of the preSE t invention is the provision of a method of economicaly removing buried lead pipe from the ground and, if requi E4, for subsequent installation of a plastics pipe.
Summary of Invention
According to a first aspect of the present inventAn there is provided a method of removing a buried pipe flom 3 the ground comprising:
(i) injecting a curable resin into the pipe so as to at least partly fill the pipe with resin; (ii) allowing or causing the resin to cure; and (iii) applying a tensile load to one end of the resin pipe composite whereby the resin/pipe composite is pulled from the ground in a generally axial direction.
In one embodiment the pipe is a lead pipe.
Preferably, in step (i) the resin is progressively injected into the pipe so as to substantially fill the pipe with resin.
Preferably, two terminal ends of the pipe may be created, typically by a first excavation at a location, e.g. where the pipe enters a property, so that the pipe may be cut off adjacent the property to expose a first pipe end, with a second excavation, eg. at the water main end, and the pipe cut of f to expose a second pipe end, thereby defining a length of pipe to be extracted.
Before injection, an elongate member such as a wire rope may be fed along the lead pipe to provide enhanced tensile strength to the composite, now of resin/lead pipe/wire rope to be formed, and in some circumstances to straighten the lead pipe.
A nylon rope may be first blown through the lead pipe and the leading end of the wire rope attached to a trailing end of the nylon rope, so that the nylon rope can be used to draw the wire rope through the lead pipe.
4 The resin may be provided from a two pack system w! th rapid curing eg, within three minutes.
Resin supply tubes may be introduced into the 1E id pipe from one exposed end, eg at the water main, until t;lC-Y emerge at the other exposed end, eg at the property, ih resin discharge from the supply tubes commenced, and idith simultaneous and progressive withdrawal of the supply Catos from the one end.
A hydraulic jack with a gripping device adapted t(-,) 10e attached to the exposed resin/lead pipe/wire rope s located in the water main excavation and is reciprocate, 0 pull the resin/lead pipe/wire composite in steps, according to the stroke of the jack.
According to a second aspect of the present inveni,',,ion there is provided a pipe at least partly filled with a curable or cured resin.
According to a third aspect of the present inveni.7,in there is provided a method of removing one underground lpipe and installing another pipe comprising:
inserting an elongate member along the one p-,t,p; injecting a curable resin into the one pip e s LS to at least partly fill the one pipe with re,,.,id; (iii) allowing or causing the resin to cure to foi,,m'a resin/pipe/elongate member composite; (iv) applying tensile loading to the resin/p:i,llp/ elongate member composite whereby the compo,,Dli e is pulled, in a generally axial direction,:xm the ground at one location; (v) releasing the elongate member from the composite and attaching it to an expansion device; (vi) retracting the elongate member and progressing the expansion device along a hole previously occupied by the pipe to expand the hole diameter; (vii) when the expansion device reaches another ground location releasing the elongate member from the expansion device and attaching a leading end of the another pipe to the expansion device; (viii) reversing a direction of movement of the expansion device, so that the expansion device progressively draws the another pipe along the hole, until the said one location of the hole is reached.
In a preferred embodiment the one underground pipe may be a lead pipe.
In said preferred embodiment the another pipe is a plastics pipe.
Preferably, the elongate member is a wire rope.
Preferably, in step(ii) the resin is injected so as to substantially fill the one pipe.
Preferably, the expansion device is an impact mole hammer.
Preferably, the expansion device expands the hole diameter to around 45mm in diameter.
Preferably, the plastics pipe is around 25mm in diameter.
The second aspect of the present invention may aim to 6 use the hole previously occupied by the lead pipe as i a pilot hole for the impact mole hammer, with expansior Of the original hole to say 4Smm diameter, ensuring relatiVE 1, easy insertion of say a 25mm diameter plastics pipe.
When the impact mole hammer emerges, e.g. at a majs excavation, a leading end of the plastics pipe may be detached from the impact mole hammer and attached to a water main.
At the other end of the plastics pipe, a spare leri 5'h of plastics piping, e.g. im, may be left for entry into ttie r property and connection to eg a stop tap.
There only remains the step of removal of a s#ct length of lead pipe that typically passes through 4n external wall of the property. This may be removeci, y passing a wire rope through the short length and using tll' 4 as a splitter to collapse the lead piping so that it catj e drawn out by pulling from inside the property and/or m outside the property. Upon completion, the spare lengt'4 Of the plastic pipe, which is still at the outside of te property is attached to this wire rope, and the wire:v,'+e is pulled, from inside the property, to draw the s],,ae length of plastics pipe into the property, again along the : I i I hole(s) previously occupied by the lead pipe, fr connection to an internal stop tap, possibly with the u0e of a bending spring to retain the hole position.
Thus there is provided a jointless plastics sery I ie pipe from water mains to property stop tap,:a4d consequently the external stop tap, with its atten(I a it 7 leakage losses, is eliminated.
The wire rope may be wound on a drum that is f ree running in one direction during extraction of the lead pipe/resin composite in one direction, but is power drivable, e.g. by an air winch, in a reverse direction to apply tension to the wire rope for both haulage and guidance of the impact mole hammer.
The plastics piping may be coiled onto a free running drum.
A nylon rope or the like may be f irst blown through the lead pipe and the leading end of the wire rope attached to a trailing end of the nylon rope, so that the nylon rope can be used to draw the wire rope through the lead pipe.
According to a fourth aspect of the present invention there is provided a pipe installed by the aforementione d third aspect.
According to a fifth aspect of the present invention there is provided a property having a pipe according to the fourth aspect.
Brief Description of the Drawings
Embodiments of the present invention will now be described by way of example only, with reference to the accompanying drawings which are:
Fig. 1 a schematic sectional view of a step involved in removal of a length of lead pipe between a water main and a property according to one aspect of the present 8 invention; Fig. 2 a schematic sectional view of a further,t'--p involved in removal of the length of].Eptd 5 pipe of Fig. 1; Fig. 3 a schematic sectional view of a yet furU,l r step involved in removal of the length of lead pipe of Fig. 1; Fig. 4 a schematic sectional view of a St OP involved in installation of a length. of replacement plastics pipe according o another aspect of the present invention; Fig. 5 a schematic sectional view of a further Otep involved in installation of the lengtb, of replacement plastics pipe; Fig. 6 a partial schematic sectional view of a further step involved in installation of t e length of replacement plastics pipe; Fig. 7 a partial schematic sectional view of a still further step involved in installati n of the length of replacement plastics pile.
9 Detailed DescriT)tion of Embodiments Referring initially to Figs 1 to there is illustrated a method of removing a buried pipe 5 from the ground 10 according to a first embodiment of the present invention, and comprising the steps of:
(i) injecting a curable resin 15 from an injector 20 into the pipe 5 so as to at least partly fill the pipe with resin; (ii) allowing or causing the resin 15 to cure; and (iii) applying a tensile load to one end of the resin 15/pipe 5 composite whereby the resin 15/pipe 5 composite is pulled from the ground in a generally axial direction by a hydraulic pipe puller or the like 25.
In this embodiment the pipe 5 is a lead pipe.
Beneficially in step (i) the resin 15 is progressively injected into the pipe 5 so as to substantially fill the pipe 5 with resin 15.
The resin 15 may be a polyurethane resin system having the following physical properties:
BASE COMPONENT Appearance: Off White Liquid viscosity: 20 - 35 poises Specific Gravity: 1.30 - 1.33 gm/CM3 ACTIVATOR COMPONENT Appearance: Brown Liquid 2 5 poises viscosity:
gM/CM3 Specific Gravity: 1.21 1.23 MIXTURE Mix ratio Base: Activator: 2.3: 1 arts by weicht 1 p Gelation time 100 gm bulk@250C 6 - 9 minutes Two terminal ends 30,35 of the pipe 5 are creatl typically by a first excavation 40 at a location, where the pipe 5 enters a property 45, so that the pi, 5 may be cut off adjacent the property 45 to expose a fj,.iot pipe end 30, with a similar excavation 50, e.g. at tie water main 55 end, and the pipe 5 cut off to expo.i.e a second pipe end 35, thereby defining a length of pipe 5 to be extracted.
Before injection of the resin 15, an elongate meilftor such as a wire rope 60 is fed along the lead pipe o provide enhanced tensile strength to the composite, no, Of resin 15/lead pipe 5/wire rope 60 to be formed, and in t.icMe circumstances to straighten the lead pipe 5. P A nylon rope (not shown) is first blown through t i le lead pipe 5 and the leading end of the wire rope 60 s attached to a trailing end of the nylon rope, so that t he nylon rope can be used to draw the wire rope 60 through t6e lead pipe 5.
The resin 15 is provided from a two pack system W rapid curing eg within three minutes.
Resin supply tubes are introduced into the lead],,j i pe 11 from one exposed end, eg. at the water main 55,until they emerge at the other exposed end eg at the property 45, with resin discharge from the supply tubes commenced, and with simultaneous and progressive withdrawal of the supply tubes from one end.
A hydraulic pipe puller or jack 25 with a gripping device adapted to be attached to the exposed resin 15/ lead pipe 5/wire rope 60 is located in the water main 55 excavation and is reciprocated to pull the resin 15/lead pipe 5/ wire 60 composite in steps, according to the stroke of the jack 25.
Referring now to Figs. 1 to 7 there is illustrated a method of removing one underground pipe 5 and installing another pipe 65 according to a second embodiment of the is present invention and comprising the steps of:
(i) inserting an elongate member such as on wire rope 60 along the one pipe 5; (ii) injecting a curable resin 15 into the one pipe 5 so as to at least partly fill the one pipe 5 with 20 resin 15; (iii) allowing or causing the resin 15 to cure to form a resin 15/pipe 5/wire rope 60 composite; (iv) applying tensile loading to the resin 15/pipe 5/ wire rope 60 composite whereby the composite is 25 pulled, in a generally axial direction, from the ground at one 45 location; (v) releasing the wire rope 60 from the composite and attaching it to an expansion device 66; 12 retracting the elongate member 60 and progresP (vi) the expansion device 66 along a hole 17 C previously occupied by the pipe 5 to expand E hole 5 diameter; (vii) when the expansion device 66 reaches ano.1,i ground location 40 releasing the elongate meffilber from the expansion device 66 and attachinc,,i a leading end of the another pipe 65 to le expansion device 66.
(viii) reversing a direction of movement of the expansion device 66 so that the expansion dev e 66 progressively draws the another pipe 65 ac the hole 70, until the said one location 4-, of the hole 5 is reached.
In this embodiment the one underground pipe 5 may e a lead pipe, and the another pipe 65 may be a plast:is pipe.
In step (ii) the resin 15 is injected so as, t:o substantially fill the one pipe 5. The resin 15 may be the same as that used in the first embodiment.
Also the expansion device 66 is an impact mole hamffiE, which may be art driven and supplied with air via air pape 67, which expands the hole 70 diameter to around 45miTi tn diameter.
The plastics pipe 65 is typically around 25mrri n diameter.
The second embodiment of the invention may aim to:Loe the hole 70 previously occupied by the lead pipe 5, as,a 1 13 pilot hole for the impact mole hammer 66, with expansion of the original hole 70 to say 45mm diameter, ensuring relatively easy insertion of say a 25mm diameter plastics pipe 65.
When the impact mole hammer emerges, e.g. at the water main 55 excavation 45, a leading end of the plastics pipe may be detached from the impact mole hammer 66 and attached to water main 55.
At the other end of the plastics pipe 65, a length of plastics pip ing e.g. im, is left for entry into the property 40 and connection to eg a stop tap 75.
There only remains the step of removal of a short length of lead pipe 80 that typically passes through an external wall of the property. This may be removed by passing a wire rope 85 through the short length and using this as a splitter to collapse the lead pipe 80 so that it can be drawn out by pulling from inside the property 40 and/or from outside the property 40. Upon completion, the spare length of the plastic pipe 65, which is still at the outside of the property 40 is attached to this wire rope 85, and the wire rope 85 is pulled, from inside the property 40, to draw the spare length of plastics pipe 65 into the property, again along the hole(s) 90 previously occupied by the lead pipe 5, for connection to internal stop tap 75, possibly with the use of a bending spring to retain the hole position.
Thus, there is provided a jointless plastics service pipe 65 from water mains S5 to property stop tap 7S, and 14 consequently the external stop tap 85, with its attendp-nt leakage losses, is eliminated.
The wire rope 60 may be wound on a drum 95 that is free running in one direction during extraction of the 1+d pipe 5/ resin 15 composite in one direction but is p(,jTA r drivable, e.g. by an air winch 96, in a reverse direci:,dn to apply tension to the wire rope 60 for both haulage ad guidance of the impact mole hammer 66.
The plastics piping 65 may be coiled onto a J-'rie running drum 100.
A nylon rope or the like (not shown) may be f Lir It blown through the lead pipe 5 and the leading end of t, le wire rope 60 attached to a trailing end of the nylon rop so that the nylon rope can be used to draw the wire rOPEI O is through the lead pipe 5.
It will be appreciated that the embodiments of t 'e present invention hereinbefore described are given by W; 'y of example only, and are not meant to limit the sco le thereof in any way.
It will particularly be appreciated that in. a i modification of the first aspect removal of the pipe may%p by a mixture of pulling from one end of the pipe alo pushing from another end of the pipe.
Claims (30)
1 A method of removing a buried pipe f rom the ground comprising:
(i) injecting a curable resin into the pipe so as to at least partly fill the pipe with resin; (ii) allowing or causing the resin to cure; and (iii) applying a tensile load to one end of the resin/pipe composite whereby the resin pipe composite is pulled from the ground in a generally axial direction.
2. A method as claimed in claim 1, wherein the pipe is a lead pipe. is
3. A method as claimed in either of claims 1 or 2, wherein in step (i) the resin is progressively injected into the pipe so as to substantially fill the pipe with resin. 20
4. A method as claimed in any preceding claim, wherein two terminal ends of the pipe are provided at a first excavation at a location where the pipe enters a property end at a second excavation at a water main 25 end respectively.
t 16
5. A method as claimed in any preceding claim, whe.(,ir, i before injection of the resin an elongate member/ i:.re rope is fed along the pipe to provide enhanced strength to the composite, now of resin/l ad pipe/elongate member (wire rope) to be formed.
6. A method as claimed in claim 5, wherein a nylon r Oe i or the like is f irst blown through the pipe and, he leading end of the elongate member/ wire rope liss attached to a trailing end of the nylon rope, SO t]Lt the nylon rope can be used to draw the wire rape through the pipe.
7. A method as claimed in any preceding claim, wher in is the resin is a polyurethane based resin.
8. A method as claimed in any preceding claim, whei' resin supply tubes are introduced into the pipe ili-b,w one exposed end, until they emerge at the otplier exposed end with resin discharge from the supply til)gs commenced, and with simultaneous and progresgAve withdrawal of the supply tubes from the one end.
9. A method as claimed in any preceding claim, where.tiL!' a hydraulic jack with a gripping device adapted to hE attached to the exposed resin pipe/wire rope 1 EC located in the water main excavation and:i E reciprocated to pull the resin pipe/wire composite ir steps, according to the stroke of the jack.
10. A pipe at least partly filled with a curable or cured resin.
11. A method of removing one underground pipe and installing another pipe comprising the steps of:
(i) inserting an elongate member along the one pipe; (ii) injecting a curable resin into the one pipe so as to at least partly fill the one pipe with resin; (iii) allowing or causing the resin to cure to form a resin/pipe/elongate member composite; (iv) applying tensile loading to the resin/pipe/ elongate member composite whereby the composite is pulled, in a generally axial direction, from the ground at one location; (v) releasing the elongate member from the composite and attaching it to an expansion device; (vi) retracting the hole elongate member and progressing the expansion device along a hole previously occupied by the pipe to expand the hole diameter; (vii) when the expansion device reaches another ground location releasing the elongate member from the expansion device and attaching a leading end of the another pipe to the expansion device; (viii) reversing a direction of movement of the expansion device, so that the expansion device progessively draws the another pipe along the hole, until the said one location of the hole is reached.
18
12. A method as claimed in claim 11, wherein the c ne underground pipe is a lead pipe.
13. A method as claimed in either of claims 11 or 12, wherein the another pipe is a plastics pipe.
14. A method as claimed in any of claims 11 to 13, wherEin the elongate member is a wire rope.
15. A method as claimed in any of claims 11 to 14, whei,En in step (ii) the resin is injected so as to substantially fill the one pipe.
is
16. A method as claimed in any of claims 11 to 15, whet'Ein the expansion device is an impact mole hammer.
whe..ie in
17. A method as claimed in any of claims 11 to 16, the expansion device expands the hole diameter to 20 around 45mm in diameter.
18. A method as claimed in any of claims 11 to 17, whercin the plastics pipe is around 25mm in diameter.
19. A method as claimed in claim 16, wherein when te impact mole hammer emerges at the water ma in excavation, a leading end of the plastics]pie detached from the impact mole hammer and attache( to the water main.
19
20. A _method as claimed in claim 19, wherein at the other end of the plastics pipe a spare length of plastics piping is left for entry into the property.
21. A method as claimed in claim 16 when dependant upon claim 14, wherein the wire rope is wound on a drum that is free running in one direction during extraction of the lead pipe/resin composite in one direction, but is power drivable in a reverse direction to apply a tension to the wire rope for both haulage and guidance of the impact mole hammer.
22. A method as claimed in claim 13, wherein the plastics piping is coiled onto a free running drum.
23. A method as claimed in claim 14, wherein a rope is first blown through the pipe and the leading end of the wire rope attached to a trailing end of the rope, so that the rope can be used to draw the wire rope through the pipe.
24. A pipe' installed by a method according to any of claims 11 to 23.
25. A property having a pipe according to claim 24.
26. A method of removing a buried pipe as hereinbefore described with reference to the accompanying drawings.
27. A pipe at least partly filled with a curable or cic resin as hereinbefore described with reference to t accompanying drawings.
28. A method of removing one underground pipe installing another underground pipe as hereinbe( i described with reference to the accompanying drawirIS
29. A pipe installed as hereinbefore described w reference to the accompanying drawings.
30. A property having a pipe installed as hereinbefc described with reference to the accompanying drawinc
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9924112.7A GB9924112D0 (en) | 1999-10-13 | 1999-10-13 | Lead pipe removal/replacement etc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0025204D0 GB0025204D0 (en) | 2000-11-29 |
| GB2358449A true GB2358449A (en) | 2001-07-25 |
Family
ID=10862583
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9924112.7A Ceased GB9924112D0 (en) | 1999-10-13 | 1999-10-13 | Lead pipe removal/replacement etc |
| GB0025204A Withdrawn GB2358449A (en) | 1999-10-13 | 2000-10-13 | Improvements in and relating to pipe removal/replacement |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9924112.7A Ceased GB9924112D0 (en) | 1999-10-13 | 1999-10-13 | Lead pipe removal/replacement etc |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1092901A3 (en) |
| GB (2) | GB9924112D0 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2100071B1 (en) * | 2006-12-15 | 2013-05-22 | Jacobus Hendrik Cilliers | Method for replacing pipes, and apparatus therefor |
| CN106885047A (en) * | 2017-02-23 | 2017-06-23 | 苏州建设监理有限公司 | Outdoor water supply pipe road is installed by detection construction method |
| CN107339111B (en) * | 2017-06-30 | 2019-01-15 | 中城投集团第六工程局有限公司 | The floating construction method of installation of more PE pipes in large-scale push pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1458592A (en) * | 1974-04-19 | 1976-12-15 | British Gas Corp | Pipe extraction apparauts |
| US4006521A (en) * | 1975-06-02 | 1977-02-08 | Pedone John A | Pipe remover |
| GB2270963A (en) * | 1992-09-25 | 1994-03-30 | Sade Compagnie Generale De Tra | Pipe removal and replacement |
| GB2285297A (en) * | 1993-11-13 | 1995-07-05 | North West Water Group Plc | Extracting pipes |
| US5984582A (en) * | 1995-02-10 | 1999-11-16 | Schwert; Siegfried | Method of extracting a hollow unit laid in the ground |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56115424A (en) * | 1980-02-15 | 1981-09-10 | Nippon Telegr & Teleph Corp <Ntt> | Replacing method for buried pipe |
| GB9026450D0 (en) * | 1990-12-05 | 1991-01-23 | Tate Pipe Lining Processes Lim | Water distribution systems |
| US5163520A (en) * | 1991-01-28 | 1992-11-17 | Lag Steering Systems | Apparatus and method for steering a pipe jacking head |
| US5482404A (en) * | 1993-07-27 | 1996-01-09 | Tenbusch, Ii; Albert A. | Underground pipe replacement technique |
| JP3630735B2 (en) * | 1994-10-28 | 2005-03-23 | 株式会社ハッコー | Burial pipe removal method |
| JP3761983B2 (en) * | 1996-08-09 | 2006-03-29 | 東京瓦斯株式会社 | Replacement method for buried pipes |
-
1999
- 1999-10-13 GB GBGB9924112.7A patent/GB9924112D0/en not_active Ceased
-
2000
- 2000-10-13 EP EP00309017A patent/EP1092901A3/en not_active Withdrawn
- 2000-10-13 GB GB0025204A patent/GB2358449A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1458592A (en) * | 1974-04-19 | 1976-12-15 | British Gas Corp | Pipe extraction apparauts |
| US4006521A (en) * | 1975-06-02 | 1977-02-08 | Pedone John A | Pipe remover |
| GB2270963A (en) * | 1992-09-25 | 1994-03-30 | Sade Compagnie Generale De Tra | Pipe removal and replacement |
| GB2285297A (en) * | 1993-11-13 | 1995-07-05 | North West Water Group Plc | Extracting pipes |
| US5984582A (en) * | 1995-02-10 | 1999-11-16 | Schwert; Siegfried | Method of extracting a hollow unit laid in the ground |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9924112D0 (en) | 1999-12-15 |
| EP1092901A3 (en) | 2003-04-02 |
| GB0025204D0 (en) | 2000-11-29 |
| EP1092901A2 (en) | 2001-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |