US20110100498A1 - Liner assembly for pipeline repair and methods of installing same - Google Patents
Liner assembly for pipeline repair and methods of installing same Download PDFInfo
- Publication number
- US20110100498A1 US20110100498A1 US12/966,412 US96641210A US2011100498A1 US 20110100498 A1 US20110100498 A1 US 20110100498A1 US 96641210 A US96641210 A US 96641210A US 2011100498 A1 US2011100498 A1 US 2011100498A1
- Authority
- US
- United States
- Prior art keywords
- liner
- assembly
- liner assembly
- inflation
- pipeline
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008439 repair process Effects 0.000 title abstract description 14
- 238000009434 installation Methods 0.000 claims description 49
- 239000011347 resin Substances 0.000 claims description 22
- 229920005989 resin Polymers 0.000 claims description 22
- 239000004033 plastic Substances 0.000 claims description 18
- 229920003023 plastic Polymers 0.000 claims description 18
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 7
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 238000002716 delivery method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
- F16L55/1654—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 and being inflated
-
- 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
- F16L55/1653—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 and being pressed into contact with the pipe by a tool which moves inside along the pipe
-
- 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
- F16L55/1656—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 materials for flexible liners
-
- 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
- F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
Definitions
- the present invention generally relates to pipeline repair and/or reinforcement and in particular to a liner assembly for pipeline repair and methods of installing the same.
- Liners are commonly used to repair and/or reinforce ruptured or weak areas in pipeline networks such as sewer systems and the like. Lateral pipes i.e. those extending from a main pipe, are especially susceptible to damage and have traditionally been repaired by conventional excavation methods. As will be appreciated, excavation methods are expensive, time consuming and disruptive.
- cure-in-place pipeline repair technology has been developed to allow pipelines to be repaired without requiring disruptive excavation.
- a resin impregnated liner is delivered to the pipeline section to be repaired and is maintained in place at that location until the curing process is complete.
- the liner may be pushed along the pipeline to its desired location by means of a series of push-rods.
- transitional areas along the pipeline such as bends and/or fittings create significant delivery problems as the push-rods are unable to effectively move beyond these transitional areas.
- the liner may be pulled along the pipeline to its desired location using a winch and cable.
- U.S. Pat. No. 6,691,741 to Manners shows a pull-in liner delivery method wherein an inflatable bladder/resin impregnated felt liner assembly is pulled into the pipeline to repair a damaged area pipeline section.
- Pipelines containing bends (i.e. 22°, 45°, 90°) and/or other fittings (i.e. Y- and T-junctions) present additional challenges.
- liners delivered by prior art installation systems are generally prone to creasing in these areas of transition. Creases disrupt fluid flow and may initiate an obstruction in the pipeline.
- Proper installation of the liners requires the liners to be smoothly and evenly urged into contact against the inner surface of the pipeline to be repaired.
- Conventional PVC/vinyl inflatable bladders used in prior art installation systems to urge liners into contact with the inner surface of the pipeline in transitional areas have been found to be deficient due to the nonmalleable nature of these inflatable bladders. As a result, these inflatable bladders often introduce folds and/or creases into the liners in these transitional areas. There is clearly a need for an improved liner assembly that can accommodate a wide variety of pipeline configurations.
- a liner assembly for pipeline repair comprising:
- a liner kit for installing a liner in a pipeline comprising:
- a method of installing a prepared liner assembly in a pipeline comprising the steps of:
- a liner assembly for installing a liner at a junction between a main pipe and a lateral pipe, said liner assembly comprising:
- a liner having main and lateral portions at a junction between main and lateral pipes comprising the steps of:
- FIG. 1 is a side view of a liner assembly for pipeline repair
- FIG. 2 is an exploded perspective view of a portion of the liner assembly
- FIG. 3 is a sectional view of another portion of the liner assembly of FIG. 1 ;
- FIGS. 4 a and 4 b are perspective views showing installation of a pull block during assembly of the liner assembly
- FIGS. 5 a to 5 c are perspective views showing installation of a retaining sleeve during assembly of the liner assembly
- FIGS. 6 a to 6 c are side views, partly in section, showing installation of the liner assembly into a pipeline to be repaired;
- FIGS. 7 a to 7 f are side views showing preparation of a liner assembly for installation into a T-junction within a pipeline;
- FIG. 8 is a side view, partly in section, showing installation of the liner assembly of FIGS. 7 a to 7 f into a T-junction within a pipeline;
- FIG. 9 is an enlarged side view of a portion of FIG. 8 during liner assembly position inspection.
- FIG. 10 is an enlarged side view of a portion of FIG. 8 during liner assembly retrieval.
- the liner assembly is generally provided in stock manufactured lengths, preferably provided on a roll, with required lengths being cut from stock.
- the liner assembly is generally dimensioned to suit lateral pipelines ranging from 11 ⁇ 2 inches up to 6′′, but smaller or larger diameters (i.e. for use in mainlines) can be used.
- the liner assembly provides a convenient pre-assembled unit wherein a malleable inflation bladder is pre-positioned within a liner during manufacture. In use, the liner assembly is cut to size with the ends of the liner assembly being trimmed and sealed with the appropriate installation gear. The liner assembly is then impregnated with a resin, and subsequently positioned and inflated to repair a damaged section of pipeline.
- the liner assembly also provides a pre-positioned generally non-stretchable strap extending the length of the liner assembly, the strap being fixed at each sealed end, thus serving to prevent longitudinal stretching of the malleable inflatable bladder and liner during positioning within a pipeline.
- the liner assembly 10 includes a liner segment 12 , an installation end 14 at one end of the liner segment 12 , and an inflation end 16 at the opposite end of the liner segment 12 .
- the installation end 14 is fitted with a pull block 36 that enables attachment of a suitable pull mechanism (i.e. a winch).
- the liner assembly is further fitted with an inflation block 38 at the inflation end 16 , so as to allow the interior area of the liner assembly 10 to be inflated.
- the liner segment 12 is longitudinally folded over itself and bound at twelve (12) to eighteen (18) inch intervals using tape 18 .
- Tapered sections 44 are also formed on the liner assembly 10 . This arrangement of the longitudinal folds and the tapered sections allows the liner assembly to be manipulated and moved to the correct location in the pipeline.
- FIG. 2 better illustrates the liner segment 12 .
- liner segment 12 is multi-layered, comprising an outer felt liner tube 22 , an elongate malleable inflatable bladder 24 positioned therethrough, and a non-stretchable strap 26 positioned within and along the length of the inflatable bladder 24 .
- the liner assembly as better represented in partial cross-section in FIG. 3 , further comprises a plastic sheathing 23 over the outer surface of the outer felt liner tube 22 , and generally also comprises a release plastic 40 positioned between the outer felt liner tube 22 and the elongate malleable inflatable bladder 24 .
- the plastic sheathing 23 may be fitted to the outside circumference of the outer felt liner tube 22 , in this embodiment it is adapted to have a second longitudinal edge overlap a first longitudinal edge by approximately 1 . 5 inches. To maintain the plastic sheathing in place, the overlap may be temporarily tack welded.
- the malleable inflatable bladder 24 is generally formed of rubber or silicone
- the non-stretchable strap 26 is generally formed from woven nylon or vinyl. It will be appreciated, however, that a skilled person in the art may choose to use a suitable substitute material for the above noted inflatable bladder 24 and/or strap 26 .
- the liner tube 22 is generally referred to in this description as being constructed of felt, one skilled in the art may choose to use an alternate substitute material.
- FIG. 2 Also shown in FIG. 2 is a pair of non-stretchable retaining sleeves 32 , 34 as well as the pull block 36 and the inflation block 38 .
- the retaining sleeves 32 , 34 are generally made of woven nylon or vinyl, but suitable alternatives may be readily implemented as determinable by one skilled in the art.
- the length of liner required is first determined. To ensure the liner assembly 10 covers the areas of the pipeline to be repaired, and so that into the liner assembly incorporates a sufficient length of liner that permits trimming and fitting of the appropriate installation gear, generally an extra length (i.e. 10′′ (250 mm)) is added to each end. A segment of liner assembly of appropriate length is then cut and prepared as shown in FIG. 2 .
- a portion of the outer felt liner tube 22 and plastic sheathing 23 of the liner segment 12 is cut back to expose a length of inflatable bladder 24 , and where applicable, release plastic 40 .
- release plastic 40 surrounds the inflatable bladder 24 along its entire length, and serves to facilitate easy removal of the inflatable bladder 24 following installation.
- the liner assembly is then further trimmed to expose a length (i.e. 4′′) of strap 26 at each end 14 , 16 .
- installation end 14 and inflation end 16 are sealed with suitable installation gear.
- the pull block 36 is inserted into the inflatable bladder 24 .
- the inflatable bladder 24 in the region surrounding the inserted pull block 36 is subsequently folded in or cinched (as shown in FIG. 4 b ), onto the pull block 36 , ensuring a generally tight fit, sufficient to allow inflation of the inflatable bladder later in the procedure.
- strap 26 is tightly incorporated into the folds of the inflatable bladder, or into the taping used to securely maintain this arrangement at installation end 14 , as shown in FIG. 4 b .
- strap 26 may be firmly attached to pull block 36 , with the inflatable bladder 24 being folded in or cinched as described above.
- Inflation end 16 is similarly prepared (not shown), substituting inflation block 38 for the pull block 36 .
- strap 26 is tightly incorporated into the folds or taping at inflation end 16 , or alternatively attached directly to inflation block 38 .
- each end 14 , 16 is further prepared by inserting between the inflatable bladder 24 and the outer felt liner tube 22 a retaining sleeve 32 , 34 (see FIG. 5 a ; only end 14 and retaining sleeve 32 represented).
- the retaining sleeve 32 , 34 is cut to a length that starts at the front edge of the installation gear (pull block 36 or inflation block 38 ) and reaches up into the liner at least 6′′ (See FIG. 5 b ).
- the retaining sleeve 32 , 34 is positioned between the release plastic 40 and the inflatable bladder 24 . As shown in FIG.
- each end 14 , 16 the retaining sleeve 32 , 34 and release plastic 40 is folded in, over the taped ends previously prepared, and securely taped.
- Each end 14 , 16 is then further secured using suitable clamps 41 (i.e. gear clamps) to ensure a tight fit around the blocks positioned therein.
- ends 14 , 16 being sealed in two stages (i.e. first taped and secondly clamped), the process is merely exemplary and a person skilled in the art may choose to seal each end about the respective gear in an alternate suitable manner so as to achieve substantially sealed ends.
- the outer felt liner tube 22 is impregnated with an appropriate resin (i.e. epoxy).
- an appropriate resin i.e. epoxy
- the process of impregnating the outer felt liner tube 22 is commonly referred to as “wetting”.
- a portion of the resin is delivered to the space between the outer felt liner tube 22 and the inflatable bladder 24 . If a release plastic 40 is provided, the resin is delivered to the space immediately adjacent the outer felt liner tube 22 .
- rollers are used in a manner known in the art. To ensure a complete wet out procedure, it is helpful to apply excess resin to both ends of the outer felt liner tube 22 .
- the plastic sheathing 23 on the outside surface of the outer felt liner tube 22 is scored to facilitate migration of the resin out of the outer felt liner tube 22 .
- Contact of the resin with the pipeline being repaired ensures that the liner being installed is fixed in place.
- the outside surface of plastic sheathing 23 is then wiped to ensure a clean dry surface.
- the liner assembly is then longitudinally folded and taped at approximately 12 to 18 ′′ intervals 42 to retain this folded arrangement.
- the leading edge of the outer felt liner tube 22 is taped to form a tapered configuration 44 .
- a silicone release gel may be added to each end 14 , 16 of the liner assembly.
- a winch cable 46 is attached to pulling block 36 , with the optional use of devises 48 .
- an air line 50 is attached to inflation block 38 .
- FIGS. 6 a through 6 c show the liner assembly 10 in a linear section of pipeline.
- a winch (not shown) is used to pull the liner assembly into a pipeline P to be repaired and/or reinforced via winch cable 46 , as shown in FIG. 6 a .
- an air pump (not shown) is operated to supply air through air line 50 , connected to inflation block 38 . Air fed through the air line 50 passes through inflation block 38 and into the internal reservoir 51 of the inflatable bladder 24 . The inflatable bladder 24 is inflated until the liner assembly 10 expands to the point where the outer felt liner tube 22 is urged against and firmly contacts the interior surface 52 of the pipeline as shown in FIG. 6 b .
- the taped portions of the liner assembly release, allowing the liner assembly, and surrounding plastic sheathing 23 to expand and contact the interior surface 52 .
- the liner assembly is then maintained in this condition for a time period sufficient to enable the wetted outer felt liner tube to cure.
- the air within the internal reservoir 51 is released through the inflation block 38 and air line 50 (see FIG. 6 c ).
- the air pump may be used to evacuate air from the internal reservoir, allowing the inflatable bladder 24 to resume its natural flat state. Once evacuated, the inflatable bladder is then withdrawn from the pipeline via winch cable 46 , leaving the cured outer felt liner tube 22 in position within the pipeline.
- the appropriate air pressure for inflating the inflatable bladder 24 depends on the diameter of the liner assembly.
- liner assemblies having a diameter ranging from 3′′ to 6′′ are inflated to approximately 12 to 15 pounds per square inch (psi).
- Liner assemblies of smaller diameter i.e. 11 ⁇ 2 ′′ and 2′′ liners
- the air pressure should be sufficient to break the tape 42 spaced along the longitudinally folded liner assembly, allowing the liner assembly to fill the pipeline being repaired.
- the liner assembly may also be used to install a liner in a bent section of pipeline.
- the ability of the liner assembly to adapt to bends is provided by the malleable nature of the inflatable bladder used in the liner assembly.
- the bladder As the liner assembly is inflated in a transitional area, the bladder not only stretches to accommodate the air pressure contained therein, but conforms to the bend so as to ensure the resin-impregnated liner is urged into contact with all surfaces of the transitional area.
- the inflatable bladder achieves this by allowing variable stretching, i.e. stretching less at the inside edge while stretching more at the outside edge of the bend.
- the liner assembly 100 includes a T-shaped malleable bladder assembly 102 having a main portion 104 and a lateral portion 106 connected by a fused T-joint 108 .
- the lateral portion 106 further comprises a release plastic 110 and a non-stretchable strap 112 .
- the main portion 104 further comprises a flow-through carrier 114 extending therethrough. Strap 112 is fused to the flow-through carrier 114 in the region of the fused T-joint 108 .
- FIGS. 7 a through 7 f show the T-shaped bladder assembly 102 being prepared for installation.
- FIG. 7 a shows the insertion of a retaining sleeve 116 on end portion 118 of the lateral portion 106 .
- the end portion 118 is further fitted with a pull block 120 (see FIG. 7 b ) adapted to be coupled to an installation cable 122 and winch (not shown).
- the lateral portion 106 of the inflatable bladder and the surrounding release plastic 110 is subsequently folded in or cinched (as shown in FIG. 7 c ), onto the pull block 120 , ensuring a generally tight fit, sufficient to allow inflation of the T-shaped bladder assembly 102 later in the procedure.
- preparation of the lateral portion 106 further comprises the placement of suitable clamps 124 (i.e. gear clamps) to ensure a tight fit around the pull block positioned therein.
- each end of the main portion 104 receives a non-stretchable retaining sleeve 126 , 128 so as to prevent radial overexpansion of the bladder assembly upon inflation.
- This arrangement is then sealed to the respective ends of the flow-through carrier 114 extending therethrough using tape 130 and suitable clamps 132 .
- the liner segments can be placed into position on the T-shaped bladder assembly. Note that all liner segments are wetted (i.e. impregnated with resin) prior to installation. As shown in FIG. 7 d , the lateral liner segment 140 is placed over the lateral portion 106 . To ensure a complete transition to the main portion of the pipeline, the lateral liner segment 140 is provided with a flange 142 . To complete the liner assembly, a mainline segment 144 is then placed into position. The mainline segment 144 is configured to cover the flange 142 of the lateral liner segment 140 and envelop the main portion 104 . As such, a complete lateral to mainline transition is achieved.
- an installation cable 134 is attached to the leading end 114 a of the flow-through carrier 114 and extends to a winch (not shown).
- a retrieval cable 136 is attached to the training end 114 b of the flow-through carrier 114 and extends to a winch (not shown).
- a hose 138 having one end coupled to a fluid source such as an air pump (not shown) extends through the flow-through carrier 114 and is in fluid communication with the internal area of the bladder assembly via a valve (not shown).
- FIGS. 8 to 10 installation of the T-shaped bladder assembly 102 into a pipeline having a T-junction will be described.
- the liner assembly 100 is launched through a manhole 146 and into a main pipe 148 .
- a remote controlled camera 150 may also be placed in the main pipe 148 .
- the installation cable 122 which has been previously fed through a lateral pipe 152 that is connected to the main pipe 148 to define the T-junction to be repaired and/or reinforced, is then used to pull the lateral portion 106 of the bladder assembly 102 into the main pipe 148 .
- the installation cables 122 and 134 are pulled simultaneously. Pulling of the installation cable 134 advances the flow-through carrier 114 and hence bladder assembly 102 towards the T-junction defined by the main and lateral pipes 148 and 152 respectively. Pulling of the installation cable 122 advances the lateral portion 106 of the bladder assembly 102 up into the lateral pipe 152 .
- the remote controlled camera 150 is used by the technicians to assist in the proper positioning of the liner at the T-junction as shown in FIG. 9 .
- the air pump is operated to feed air into the hose 138 .
- Air fed into the hose 138 enters the bladder assembly 102 until both the lateral portion 106 and main portion 104 are inflated so as to force the lateral liner segment 140 and mainline liner segment 144 into contact with the interior surfaces of the main and lateral pipes 148 and 152 as shown in FIG. 9 .
- the bladder assembly 102 is maintained in this condition until the liner cures.
- the air pump is operated to evacuate air from the bladder assembly 102 , allowing the lateral portion 106 and main portion 104 to deflate (See FIG. 10 ).
- the retrieval cable 136 is pulled to remove the flow-through carrier 114 and attached bladder assembly 102 from the cured-in-place liner. With the bladder assembly 102 and flow-through carrier 114 separated from the liner, the retrieval cable 136 is pulled until the assembly is removed from the pipeline via the manhole 146 .
- the liner assembly 100 is shown for use in installing a liner at a T-junction between a lateral pipe and a main pipe, those of skill in the art will appreciate that the installation system can be used to install liners in other types of pipe junctions.
- non-stretchable strap and non-stretchable retaining sleeves serve to control the expansion of the malleable inflatable bladder.
- the strap is used to prevent longitudinal over-expansion of the inflatable bladder during both installation and inflation, while the retaining sleeves serve to prevent radial over-expansion (i.e. ballooning) at respective ends of the liner assembly.
- the strap and retaining sleeves are generally manufactured from woven nylon or vinyl, suitable non-stretchable alternatives may also be used to achieve the desired expansion control.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A liner assembly for pipeline repair and methods of installing same. The liner assembly generally comprises an outer tubular liner, an inner malleable inflatable bladder positioned longitudinally within said liner, and a generally non-stretchable strap positioned longitudinally within the malleable inflatable bladder. The generally non-stretchable strap restricts longitudinal over-expansion during positioning and inflation of the liner assembly within a pipeline.
Description
- This application is a division of U.S. patent application Ser. No. 11/120,040, entitled LINEAR ASSEMBLY FOR PIPELINE REPAIR AND METHODS OF INSTALLING SAME, filed on May 2, 2005, assigned to the assignee of the present application, the disclosure of which is expressly incorporated herein by reference.
- The present invention generally relates to pipeline repair and/or reinforcement and in particular to a liner assembly for pipeline repair and methods of installing the same.
- Liners are commonly used to repair and/or reinforce ruptured or weak areas in pipeline networks such as sewer systems and the like. Lateral pipes i.e. those extending from a main pipe, are especially susceptible to damage and have traditionally been repaired by conventional excavation methods. As will be appreciated, excavation methods are expensive, time consuming and disruptive.
- To avoid the problems associated with excavation methods, “cure-in-place” pipeline repair technology has been developed to allow pipelines to be repaired without requiring disruptive excavation. During “cure-in-place” pipeline repair, a resin impregnated liner is delivered to the pipeline section to be repaired and is maintained in place at that location until the curing process is complete.
- A variety of installation systems for delivering “cure-in-place” liners to pipeline sections to be repaired are used in the industry. For example, the liner may be pushed along the pipeline to its desired location by means of a series of push-rods. As will be appreciated, transitional areas along the pipeline such as bends and/or fittings create significant delivery problems as the push-rods are unable to effectively move beyond these transitional areas. Alternatively, and more commonly used in the industry, the liner may be pulled along the pipeline to its desired location using a winch and cable. U.S. Pat. No. 6,691,741 to Manners shows a pull-in liner delivery method wherein an inflatable bladder/resin impregnated felt liner assembly is pulled into the pipeline to repair a damaged area pipeline section. Inversion delivery where a liner is unrolled through itself by applied pressure as it projects forwardly into a pipeline has also been considered. U.S. Pat. No. 4,366,012 to Wood shows an inversion delivery process wherein a felt liner, impregnated with uncured resin is inverted into a pipeline in need of repair.
- The installation of resin-impregnated liners in pipelines presents certain challenges. For both push-in and pull-in delivery methods, excessive friction during positioning of the liner imparts longitudinal stresses on the liner, often resulting in stretching of the liner. This stretching is undesirable as it may result in weak regions of lined pipeline, and increase the likelihood of future failure of the repaired pipeline section. With respect to inversion delivery methods, due to the considerable pressures used to unroll the liner, liner rupture is not uncommon. This rupture problem is more prevalent when installing longer liners as greater pressures are required during liner installation.
- Pipelines containing bends (i.e. 22°, 45°, 90°) and/or other fittings (i.e. Y- and T-junctions) present additional challenges. As practitioners in the industry are aware, liners delivered by prior art installation systems are generally prone to creasing in these areas of transition. Creases disrupt fluid flow and may initiate an obstruction in the pipeline. Proper installation of the liners requires the liners to be smoothly and evenly urged into contact against the inner surface of the pipeline to be repaired. Conventional PVC/vinyl inflatable bladders used in prior art installation systems to urge liners into contact with the inner surface of the pipeline in transitional areas have been found to be deficient due to the nonmalleable nature of these inflatable bladders. As a result, these inflatable bladders often introduce folds and/or creases into the liners in these transitional areas. There is clearly a need for an improved liner assembly that can accommodate a wide variety of pipeline configurations.
- It is therefore an object of the present invention to obviate or mitigate at least one of the above described disadvantages.
- Accordingly, in one aspect there is provided a liner assembly for pipeline repair comprising:
-
- an outer tubular liner;
- an inner malleable inflatable bladder positioned longitudinally within said liner; and
- a generally non-stretchable strap positioned longitudinally within the malleable inflatable bladder, said strap restricting longitudinal over-expansion during positioning and inflation of the liner assembly within a pipeline.
- According to another aspect of the present invention, provided is a liner kit for installing a liner in a pipeline, the kit comprising:
-
- the liner assembly as defined above;
- a pair of non-stretchable retaining sleeves for insertion into each end of a liner assembly for preventing radial over-expansion during inflation of the liner assembly;
- a pull block for insertion into one end of the liner assembly, allowing for a pulling device to be attached to the liner assembly;
- an inflation block for insertion into a second end of the liner assembly, allowing for inflation of the malleable inflatable bladder; and
- a resin kit comprising components for preparing a resin for wetting said felt liner prior to installation.
- According to a further aspect of the present invention, provided is a method of installing a prepared liner assembly in a pipeline, comprising the steps of:
-
- pulling a prepared liner assembly carrying a wetted liner into position in said pipeline, said liner assembly including an outer felt liner tube, an inner malleable inflatable bladder positioned longitudinally within said felt liner tube, and a non-stretchable strap positioned longitudinally within the inflatable bladder, said non-stretchable strap being fixed to each end of said liner assembly to restrict longitudinal over-expansion during positioning and inflation of the liner assembly within said pipeline;
- introducing fluid into said malleable inflatable bladder so that said malleable inflatable bladder expands to bring said outer felt liner tube into firm contact with interior surfaces of the pipeline;
- maintaining said liner assembly in an inflated condition for a time period sufficient for the outer felt liner tube to cure;
- deflating said malleable inflatable bladder and retrieving said malleable inflatable bladder from the liner assembly.
- According to yet another aspect of the present invention, provided is a liner assembly for installing a liner at a junction between a main pipe and a lateral pipe, said liner assembly comprising:
-
- a malleable inflatable bladder assembly for carrying a liner, said malleable inflatable bladder assembly including a main portion and a lateral portion;
- a flow through carrier contained within said main portion; and
- a non-stretchable strap within said lateral portion,
- wherein said non-stretchable strap is fixed at one end to said flow through carrier contained in said main portion, and adapted on an opposing end to be fixed to the end of said lateral portion of said liner assembly during preparation for installation, said non-stretchable strap serving to restrict longitudinal over-expansion of the lateral portion during positioning and inflation of the liner assembly within a pipeline.
- According to further aspect of the present invention, provided is a method of installing a liner having main and lateral portions at a junction between main and lateral pipes, said method comprising the steps of:
-
- pulling a prepared liner assembly into said pipeline, said liner assembly comprising a malleable inflatable bladder assembly for carrying a wetted liner, said malleable inflatable bladder assembly including a main portion and a lateral portion, said main portion containing a flow through carrier, said lateral portion containing a non-stretchable strap extending from said flow through carrier to a sealed end of the lateral portion,
- said non-stretchable strap serving to restrict longitudinal over-expansion of the lateral portion during positioning and inflation of the liner assembly within a pipeline,
- introducing fluid into said malleable inflatable bladder assembly to inflate said assembly so that said assembly expands to bring said wetted liner into firm contact with interior surfaces of the main and lateral pipes and conform said wetted liner to the shape of said junction;
- maintaining said malleable inflatable bladder assembly in an inflated condition for a time period sufficient for said wetted liner to cure;
- deflating said malleable inflatable bladder assembly; and
- retrieving said bladder assembly from said pipeline by pulling said bladder assembly from said liner.
- Embodiments will now be described more fully with reference to the accompanying drawings in which:
-
FIG. 1 is a side view of a liner assembly for pipeline repair; -
FIG. 2 is an exploded perspective view of a portion of the liner assembly; -
FIG. 3 is a sectional view of another portion of the liner assembly ofFIG. 1 ; -
FIGS. 4 a and 4 b are perspective views showing installation of a pull block during assembly of the liner assembly; -
FIGS. 5 a to 5 c are perspective views showing installation of a retaining sleeve during assembly of the liner assembly; -
FIGS. 6 a to 6 c are side views, partly in section, showing installation of the liner assembly into a pipeline to be repaired; -
FIGS. 7 a to 7 f are side views showing preparation of a liner assembly for installation into a T-junction within a pipeline; -
FIG. 8 is a side view, partly in section, showing installation of the liner assembly ofFIGS. 7 a to 7 f into a T-junction within a pipeline; -
FIG. 9 is an enlarged side view of a portion ofFIG. 8 during liner assembly position inspection; and -
FIG. 10 is an enlarged side view of a portion ofFIG. 8 during liner assembly retrieval. - The liner assembly is generally provided in stock manufactured lengths, preferably provided on a roll, with required lengths being cut from stock. The liner assembly is generally dimensioned to suit lateral pipelines ranging from 1½ inches up to 6″, but smaller or larger diameters (i.e. for use in mainlines) can be used. The liner assembly provides a convenient pre-assembled unit wherein a malleable inflation bladder is pre-positioned within a liner during manufacture. In use, the liner assembly is cut to size with the ends of the liner assembly being trimmed and sealed with the appropriate installation gear. The liner assembly is then impregnated with a resin, and subsequently positioned and inflated to repair a damaged section of pipeline. The liner assembly also provides a pre-positioned generally non-stretchable strap extending the length of the liner assembly, the strap being fixed at each sealed end, thus serving to prevent longitudinal stretching of the malleable inflatable bladder and liner during positioning within a pipeline.
- Turning now to
FIG. 1 , a complete liner assembly is shown and is generally identified byreference numeral 10. As can be seen, theliner assembly 10 includes aliner segment 12, aninstallation end 14 at one end of theliner segment 12, and aninflation end 16 at the opposite end of theliner segment 12. To facilitate positioning of theliner assembly 10 in the pipeline, theinstallation end 14 is fitted with apull block 36 that enables attachment of a suitable pull mechanism (i.e. a winch). The liner assembly is further fitted with aninflation block 38 at theinflation end 16, so as to allow the interior area of theliner assembly 10 to be inflated. Theliner segment 12 is longitudinally folded over itself and bound at twelve (12) to eighteen (18) inchintervals using tape 18.Tapered sections 44 are also formed on theliner assembly 10. This arrangement of the longitudinal folds and the tapered sections allows the liner assembly to be manipulated and moved to the correct location in the pipeline. -
FIG. 2 better illustrates theliner segment 12. As can be seen,liner segment 12 is multi-layered, comprising an outerfelt liner tube 22, an elongate malleableinflatable bladder 24 positioned therethrough, and anon-stretchable strap 26 positioned within and along the length of theinflatable bladder 24. The liner assembly, as better represented in partial cross-section inFIG. 3 , further comprises aplastic sheathing 23 over the outer surface of the outerfelt liner tube 22, and generally also comprises arelease plastic 40 positioned between the outerfelt liner tube 22 and the elongate malleableinflatable bladder 24. Note that while theplastic sheathing 23 may be fitted to the outside circumference of the outerfelt liner tube 22, in this embodiment it is adapted to have a second longitudinal edge overlap a first longitudinal edge by approximately 1.5 inches. To maintain the plastic sheathing in place, the overlap may be temporarily tack welded. The malleableinflatable bladder 24 is generally formed of rubber or silicone, while thenon-stretchable strap 26 is generally formed from woven nylon or vinyl. It will be appreciated, however, that a skilled person in the art may choose to use a suitable substitute material for the above notedinflatable bladder 24 and/orstrap 26. It will also be appreciated that while theliner tube 22 is generally referred to in this description as being constructed of felt, one skilled in the art may choose to use an alternate substitute material. Also shown inFIG. 2 is a pair ofnon-stretchable retaining sleeves pull block 36 and theinflation block 38. The retainingsleeves - To repair a damaged section of pipeline, using methods known in the art, the length of liner required is first determined. To ensure the
liner assembly 10 covers the areas of the pipeline to be repaired, and so that into the liner assembly incorporates a sufficient length of liner that permits trimming and fitting of the appropriate installation gear, generally an extra length (i.e. 10″ (250 mm)) is added to each end. A segment of liner assembly of appropriate length is then cut and prepared as shown inFIG. 2 . - As can be seen in
FIG. 2 , a portion of the outerfelt liner tube 22 andplastic sheathing 23 of theliner segment 12 is cut back to expose a length ofinflatable bladder 24, and where applicable,release plastic 40. Note that for liners up to 2″ in diameter, a release plastic may not be provided. As shown with respect toFIG. 3 , release plastic 40 surrounds theinflatable bladder 24 along its entire length, and serves to facilitate easy removal of theinflatable bladder 24 following installation. For smaller diameter liners (up to 4″), generally 6″ of exposed inflatable bladder is sufficient. For larger diameter liners, generally 9″ of exposed inflatable bladder is sufficient. The liner assembly is then further trimmed to expose a length (i.e. 4″) ofstrap 26 at eachend - To prepare the segment of trimmed liner assembly for installation,
installation end 14 andinflation end 16 are sealed with suitable installation gear. As shown inFIG. 4 a, atinstallation end 14, thepull block 36 is inserted into theinflatable bladder 24. Theinflatable bladder 24 in the region surrounding the insertedpull block 36 is subsequently folded in or cinched (as shown inFIG. 4 b), onto thepull block 36, ensuring a generally tight fit, sufficient to allow inflation of the inflatable bladder later in the procedure. While preparinginstallation end 14,strap 26 is tightly incorporated into the folds of the inflatable bladder, or into the taping used to securely maintain this arrangement atinstallation end 14, as shown inFIG. 4 b. Alternatively,strap 26 may be firmly attached to pullblock 36, with theinflatable bladder 24 being folded in or cinched as described above.Inflation end 16 is similarly prepared (not shown), substitutinginflation block 38 for thepull block 36 . As is the case for theinstallation end 14,strap 26 is tightly incorporated into the folds or taping atinflation end 16, or alternatively attached directly toinflation block 38. - With both ends 14, 16 sealed with the appropriate installation gear, each
end inflatable bladder 24 and the outer felt liner tube 22 a retainingsleeve 32, 34 (seeFIG. 5 a; only end 14 and retainingsleeve 32 represented). The retainingsleeve block 36 or inflation block 38) and reaches up into the liner at least 6″ (SeeFIG. 5 b). For liners havingrelease plastic 40, the retainingsleeve release plastic 40 and theinflatable bladder 24. As shown inFIG. 5 c, at eachend sleeve end - While the above description teaches ends 14, 16 being sealed in two stages (i.e. first taped and secondly clamped), the process is merely exemplary and a person skilled in the art may choose to seal each end about the respective gear in an alternate suitable manner so as to achieve substantially sealed ends.
- With the liner assembly sealed at both ends 14, 16 with the appropriate installation gear, the outer
felt liner tube 22 is impregnated with an appropriate resin (i.e. epoxy). The process of impregnating the outerfelt liner tube 22 is commonly referred to as “wetting”. To wet the outer felt liner tube, a portion of the resin is delivered to the space between the outerfelt liner tube 22 and theinflatable bladder 24. If arelease plastic 40 is provided, the resin is delivered to the space immediately adjacent the outerfelt liner tube 22. To move the resin slug through theliner assembly 10, rollers are used in a manner known in the art. To ensure a complete wet out procedure, it is helpful to apply excess resin to both ends of the outerfelt liner tube 22. - After the outer
felt liner tube 22 of theliner assembly 10 has been wetted, theplastic sheathing 23 on the outside surface of the outerfelt liner tube 22 is scored to facilitate migration of the resin out of the outerfelt liner tube 22. Contact of the resin with the pipeline being repaired ensures that the liner being installed is fixed in place. The outside surface ofplastic sheathing 23 is then wiped to ensure a clean dry surface. Referring back toFIG. 1 , the liner assembly is then longitudinally folded and taped at approximately 12 to 18″intervals 42 to retain this folded arrangement. To facilitate entry and/or movement of the liner assembly in a pipeline, the leading edge of the outerfelt liner tube 22 is taped to form a taperedconfiguration 44. To facilitate the release of the inflatable bladder, a silicone release gel may be added to eachend installation end 14, awinch cable 46 is attached to pullingblock 36, with the optional use ofdevises 48. Toinflation end 16, anair line 50 is attached toinflation block 38. -
FIGS. 6 a through 6 c show theliner assembly 10 in a linear section of pipeline. To install the liner assembly, a winch (not shown) is used to pull the liner assembly into a pipeline P to be repaired and/or reinforced viawinch cable 46, as shown inFIG. 6 a. Once the liner assembly is at the desired location within the pipeline, an air pump (not shown) is operated to supply air throughair line 50, connected toinflation block 38. Air fed through theair line 50 passes throughinflation block 38 and into theinternal reservoir 51 of theinflatable bladder 24. Theinflatable bladder 24 is inflated until theliner assembly 10 expands to the point where the outerfelt liner tube 22 is urged against and firmly contacts theinterior surface 52 of the pipeline as shown inFIG. 6 b. During inflation, the taped portions of the liner assembly release, allowing the liner assembly, and surroundingplastic sheathing 23 to expand and contact theinterior surface 52. The liner assembly is then maintained in this condition for a time period sufficient to enable the wetted outer felt liner tube to cure. - Following curing of the outer
felt liner tube 22, the air within theinternal reservoir 51 is released through theinflation block 38 and air line 50 (seeFIG. 6 c). To facilitate this process, the air pump may be used to evacuate air from the internal reservoir, allowing theinflatable bladder 24 to resume its natural flat state. Once evacuated, the inflatable bladder is then withdrawn from the pipeline viawinch cable 46, leaving the cured outer feltliner tube 22 in position within the pipeline. - The appropriate air pressure for inflating the
inflatable bladder 24 depends on the diameter of the liner assembly. In general, liner assemblies having a diameter ranging from 3″ to 6″ are inflated to approximately 12 to 15 pounds per square inch (psi). Liner assemblies of smaller diameter (i.e. 1½ ″ and 2″ liners) are inflated to approximately 24 psi. During the inflation process, the air pressure should be sufficient to break thetape 42 spaced along the longitudinally folded liner assembly, allowing the liner assembly to fill the pipeline being repaired. - Although the installation of the liner assembly has been shown with respect a linear section of pipeline, the liner assembly may also be used to install a liner in a bent section of pipeline. The ability of the liner assembly to adapt to bends (i.e. 22°, 45°, 90°) is provided by the malleable nature of the inflatable bladder used in the liner assembly. As the liner assembly is inflated in a transitional area, the bladder not only stretches to accommodate the air pressure contained therein, but conforms to the bend so as to ensure the resin-impregnated liner is urged into contact with all surfaces of the transitional area. The inflatable bladder achieves this by allowing variable stretching, i.e. stretching less at the inside edge while stretching more at the outside edge of the bend. Prior art systems that used woven nylon or vinyl bladder systems could not achieve this variable stretching, ultimately resulting in creases and/or folds being formed in the resin-impregnated and resultant cured liner. The reduction and/or elimination of these creases results in greater fluid flow in the repaired section and well as a reduction in the likelihood of debris retainment and possible obstruction.
- Turning now to
FIGS. 7 to 10 , an alternative embodiment of a liner assembly for installing a liner at a T-junction within a pipeline is shown and is generally identified byreference numeral 100. As can be seen, theliner assembly 100 includes a T-shapedmalleable bladder assembly 102 having amain portion 104 and alateral portion 106 connected by a fused T-joint 108. Thelateral portion 106 further comprises arelease plastic 110 and anon-stretchable strap 112. Themain portion 104 further comprises a flow-throughcarrier 114 extending therethrough.Strap 112 is fused to the flow-throughcarrier 114 in the region of the fused T-joint 108. -
FIGS. 7 a through 7 f show the T-shapedbladder assembly 102 being prepared for installation.FIG. 7 a shows the insertion of a retainingsleeve 116 onend portion 118 of thelateral portion 106. To facilitate positioning, theend portion 118 is further fitted with a pull block 120 (seeFIG. 7 b) adapted to be coupled to aninstallation cable 122 and winch (not shown). Thelateral portion 106 of the inflatable bladder and the surroundingrelease plastic 110 is subsequently folded in or cinched (as shown inFIG. 7 c), onto thepull block 120, ensuring a generally tight fit, sufficient to allow inflation of the T-shapedbladder assembly 102 later in the procedure. Note thatstrap 112 is tightly incorporated into the folds of the cinchedlateral portion 106, thereby restricting the extent of longitudinal stretching inlateral portion 106 by limiting the distance betweenend portion 118 and the flow-throughcarrier 114 to which thestrap 112 is fused. As shown inFIGS. 7 c and 7 d, preparation of thelateral portion 106 further comprises the placement of suitable clamps 124 (i.e. gear clamps) to ensure a tight fit around the pull block positioned therein. - As shown in
FIGS. 7 c and 7 d, each end of themain portion 104 receives anon-stretchable retaining sleeve carrier 114 extending therethrough usingtape 130 andsuitable clamps 132. - With the
lateral portion 106 and themain portion 104 prepared for installation, the liner segments can be placed into position on the T-shaped bladder assembly. Note that all liner segments are wetted (i.e. impregnated with resin) prior to installation. As shown inFIG. 7 d, thelateral liner segment 140 is placed over thelateral portion 106. To ensure a complete transition to the main portion of the pipeline, thelateral liner segment 140 is provided with aflange 142. To complete the liner assembly, amainline segment 144 is then placed into position. Themainline segment 144 is configured to cover theflange 142 of thelateral liner segment 140 and envelop themain portion 104. As such, a complete lateral to mainline transition is achieved. To complete the preparation, aninstallation cable 134 is attached to the leading end 114 a of the flow-throughcarrier 114 and extends to a winch (not shown). Aretrieval cable 136 is attached to the training end 114 b of the flow-throughcarrier 114 and extends to a winch (not shown). Ahose 138 having one end coupled to a fluid source such as an air pump (not shown) extends through the flow-throughcarrier 114 and is in fluid communication with the internal area of the bladder assembly via a valve (not shown). - Turning now to
FIGS. 8 to 10 , installation of the T-shapedbladder assembly 102 into a pipeline having a T-junction will be described. With the liner assembly prepared for installation, theliner assembly 100 is launched through amanhole 146 and into amain pipe 148. A remote controlledcamera 150 may also be placed in themain pipe 148. Theinstallation cable 122, which has been previously fed through alateral pipe 152 that is connected to themain pipe 148 to define the T-junction to be repaired and/or reinforced, is then used to pull thelateral portion 106 of thebladder assembly 102 into themain pipe 148. Once the full length of thelateral portion 106 of thebladder assembly 102 is in themain pipe 148, theinstallation cables installation cable 134 advances the flow-throughcarrier 114 and hencebladder assembly 102 towards the T-junction defined by the main andlateral pipes installation cable 122 advances thelateral portion 106 of thebladder assembly 102 up into thelateral pipe 152. During this stage, the remote controlledcamera 150 is used by the technicians to assist in the proper positioning of the liner at the T-junction as shown inFIG. 9 . - With the
liner assembly 100 properly positioned at the T-junction, the air pump is operated to feed air into thehose 138. Air fed into thehose 138 enters thebladder assembly 102 until both thelateral portion 106 andmain portion 104 are inflated so as to force thelateral liner segment 140 andmainline liner segment 144 into contact with the interior surfaces of the main andlateral pipes FIG. 9 . As in the previous embodiments, thebladder assembly 102 is maintained in this condition until the liner cures. - Following curing of the liner, the air pump is operated to evacuate air from the
bladder assembly 102, allowing thelateral portion 106 andmain portion 104 to deflate (SeeFIG. 10 ). Once deflated, theretrieval cable 136 is pulled to remove the flow-throughcarrier 114 and attachedbladder assembly 102 from the cured-in-place liner. With thebladder assembly 102 and flow-throughcarrier 114 separated from the liner, theretrieval cable 136 is pulled until the assembly is removed from the pipeline via themanhole 146. - Although the
liner assembly 100 is shown for use in installing a liner at a T-junction between a lateral pipe and a main pipe, those of skill in the art will appreciate that the installation system can be used to install liners in other types of pipe junctions. - It will be appreciated from the above description that the non-stretchable strap and non-stretchable retaining sleeves serve to control the expansion of the malleable inflatable bladder. The strap is used to prevent longitudinal over-expansion of the inflatable bladder during both installation and inflation, while the retaining sleeves serve to prevent radial over-expansion (i.e. ballooning) at respective ends of the liner assembly. As indicated above, while the strap and retaining sleeves are generally manufactured from woven nylon or vinyl, suitable non-stretchable alternatives may also be used to achieve the desired expansion control.
- Although preferred embodiments of the present invention have been described, those of skill in the art will appreciate that variations and modifications may be made without departing from the spirit and scope thereof as defined by the appended claims.
Claims (10)
1-11. (canceled)
12. A liner assembly for installing a liner at a junction between a main pipe and a lateral pipe, said liner assembly comprising:
a malleable inflatable bladder assembly for carrying a liner, said malleable inflatable bladder assembly including a main portion and a lateral portion;
a flow through carrier contained within said main portion; and
a non-stretchable strap within said lateral portion,
wherein said non-stretchable strap is fixed at one end to said flow through carrier contained in said main portion, and adapted on an opposing end to be fixed to the end of said lateral portion of said liner assembly during preparation for installation, said non-stretchable strap serving to restrict longitudinal over-expansion of the lateral portion during positioning and inflation of the liner assembly within a pipeline.
13. The liner assembly of claim 12 wherein said malleable inflation bladder further comprises a release plastic surrounding said lateral portion, for placement between said lateral portion and said liner.
14. The liner assembly of claim 12 , wherein said non-stretchable strap is vinyl.
15. The liner assembly of claim 12 , wherein said flow through carrier extends through said main portion and further comprises on each end anchors for attachment of installation and retrieval cables.
16. A method of installing a liner having main and lateral portions at a junction between main and lateral pipes, said method comprising the steps of:
pulling a prepared liner assembly into said pipeline, said liner assembly comprising a malleable inflatable bladder assembly for carrying a wetted liner, said malleable inflatable bladder assembly including a main portion and a lateral portion, said main portion containing a flow through carrier, said lateral portion containing a non-stretchable strap extending from said flow through carrier to a sealed end of the lateral portion,
said non-stretchable strap serving to restrict longitudinal over-expansion of the lateral portion during positioning and inflation of the liner assembly within a pipeline,
introducing fluid into said malleable inflatable bladder assembly to inflate said assembly so that said assembly expands to bring said wetted liner into firm contact with interior surfaces of the main and lateral pipes and conform said wetted liner to the shape of said junction;
maintaining said malleable inflatable bladder assembly in an inflated condition for a time period sufficient for said wetted liner to cure;
deflating said malleable inflatable bladder assembly; and
retrieving said bladder assembly from said pipeline by pulling said bladder assembly from said liner.
17. A liner kit for installing a liner in a pipeline, the kit comprising:
the liner assembly as defined in claim 12 ;
a pair of non-stretchable retaining sleeves for insertion into each end of a liner assembly for preventing radial over-expansion during inflation of the liner assembly;
a pull block for insertion into one end of the liner assembly, allowing for a pulling device to be attached to the liner assembly;
an inflation block for insertion into a second end of the liner assembly, allowing for inflation of the malleable inflatable bladder; and
a resin kit comprising components for preparing a resin for wetting said felt liner prior to installation.
18. A liner kit for installing a liner in a pipeline, the kit comprising:
the liner assembly as defined in claim 13 ;
a pair of non-stretchable retaining sleeves for insertion into each end of a liner assembly for preventing radial over-expansion during inflation of the liner assembly;
a pull block for insertion into one end of the liner assembly, allowing for a pulling device to be attached to the liner assembly;
an inflation block for insertion into a second end of the liner assembly, allowing for inflation of the malleable inflatable bladder; and
a resin kit comprising components for preparing a resin for wetting said felt liner prior to installation.
19. A liner kit for installing a liner in a pipeline, the kit comprising:
the liner assembly as defined in claim 14 ;
a pair of non-stretchable retaining sleeves for insertion into each end of a liner assembly for preventing radial over-expansion during inflation of the liner assembly;
a pull block for insertion into one end of the liner assembly, allowing for a pulling device to be attached to the liner assembly;
an inflation block for insertion into a second end of the liner assembly, allowing for inflation of the malleable inflatable bladder; and
a resin kit comprising components for preparing a resin for wetting said felt liner prior to installation.
20. A liner kit for installing a liner in a pipeline, the kit comprising:
the liner assembly as defined in claim 15 ;
a pair of non-stretchable retaining sleeves for insertion into each end of a liner assembly for preventing radial over-expansion during inflation of the liner assembly;
a pull block for insertion into one end of the liner assembly, allowing for a pulling device to be attached to the liner assembly;
an inflation block for insertion into a second end of the liner assembly, allowing for inflation of the malleable inflatable bladder; and
a resin kit comprising components for preparing a resin for wetting said felt liner prior to installation.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/966,412 US20110100498A1 (en) | 2005-05-02 | 2010-12-13 | Liner assembly for pipeline repair and methods of installing same |
US13/890,610 US20130312860A1 (en) | 2005-05-02 | 2013-05-09 | Liner assembly for pipeline repair and methods of installing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/120,040 US7849883B2 (en) | 2005-05-02 | 2005-05-02 | Liner assembly for pipeline repair and methods of installing same |
US12/966,412 US20110100498A1 (en) | 2005-05-02 | 2010-12-13 | Liner assembly for pipeline repair and methods of installing same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/120,040 Division US7849883B2 (en) | 2005-05-02 | 2005-05-02 | Liner assembly for pipeline repair and methods of installing same |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/890,610 Continuation US20130312860A1 (en) | 2005-05-02 | 2013-05-09 | Liner assembly for pipeline repair and methods of installing same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110100498A1 true US20110100498A1 (en) | 2011-05-05 |
Family
ID=36763746
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/120,040 Active 2028-08-30 US7849883B2 (en) | 2005-05-02 | 2005-05-02 | Liner assembly for pipeline repair and methods of installing same |
US12/966,412 Abandoned US20110100498A1 (en) | 2005-05-02 | 2010-12-13 | Liner assembly for pipeline repair and methods of installing same |
US13/890,610 Abandoned US20130312860A1 (en) | 2005-05-02 | 2013-05-09 | Liner assembly for pipeline repair and methods of installing same |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/120,040 Active 2028-08-30 US7849883B2 (en) | 2005-05-02 | 2005-05-02 | Liner assembly for pipeline repair and methods of installing same |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/890,610 Abandoned US20130312860A1 (en) | 2005-05-02 | 2013-05-09 | Liner assembly for pipeline repair and methods of installing same |
Country Status (5)
Country | Link |
---|---|
US (3) | US7849883B2 (en) |
EP (1) | EP1719946B1 (en) |
AT (1) | ATE519983T1 (en) |
DK (1) | DK1719946T3 (en) |
ES (1) | ES2372255T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013163736A1 (en) | 2012-05-02 | 2013-11-07 | Nu Flow Technologies 2000 Inc. | Liner assembly for pipeline repair or reinforcement and method of installing same |
US9310014B2 (en) | 2009-12-07 | 2016-04-12 | Smart Pipe Company L.P. | Systems and methods for making pipe, and method of installing the pipe in a pipeline |
US9453606B2 (en) * | 2007-12-26 | 2016-09-27 | Smart Pipe Company, Inc. | Movable factory for simultaneous mobile field manufacturing and installation of non-metallic pipe |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2477797C (en) * | 2004-09-01 | 2006-05-23 | Edouard P. Kassianoff | Tensioned inflatable cover module |
US7306011B2 (en) * | 2005-04-04 | 2007-12-11 | Lmk Enterprises, Inc. | Apparatus and method for lateral pipe identification |
US7849883B2 (en) * | 2005-05-02 | 2010-12-14 | Nuflow Technologies 2000 Inc. | Liner assembly for pipeline repair and methods of installing same |
US7975726B2 (en) | 2007-08-27 | 2011-07-12 | Lmk Enterprises, Inc. | Device and method for repairing pipe |
US7661443B1 (en) * | 2007-11-17 | 2010-02-16 | Miksis Gary F | Point repair sleeve carrier for conduits |
EP2113708B1 (en) * | 2008-05-02 | 2012-04-04 | Shonan Gosei - Jushi Seisakusho K.K. | Lining material and pipeline lining method |
WO2010033297A2 (en) | 2008-09-19 | 2010-03-25 | Lightstream, L.P. | Cured-in-place liner material and methods and systems for manufacture |
SE534965C2 (en) * | 2009-11-10 | 2012-02-28 | Roeranalysgruppen I Europa Ab | Method and apparatus for installing a liner in a pipe |
US20110236138A1 (en) * | 2010-03-24 | 2011-09-29 | Cosban William C | Method for repairing and reinforcing underground pipes |
US8869839B1 (en) | 2010-03-25 | 2014-10-28 | Perma-Liner Industries, Llc | Method and device for repairing piping |
FI122524B (en) | 2010-05-04 | 2012-03-15 | Picote Oy Ltd | PROCEDURE AND ARRANGEMENTS FOR TREATMENT OF A COATING SOCK |
US20120006440A1 (en) * | 2010-07-08 | 2012-01-12 | Lmk Enterprises, Inc. | Apparatus and method for lining a pipe junction |
GB2503249B (en) * | 2012-06-20 | 2014-07-23 | Source One Environmental Ltd | Repair of pipes and pipelines |
GB2514903B (en) * | 2012-06-20 | 2015-07-01 | Source One Environmental Ltd | Repair of pipes and pipelines |
US9423064B2 (en) | 2013-04-18 | 2016-08-23 | Lmk Technologies, Llc | Method and apparatus for repairing main and lateral pipes |
CA2936058A1 (en) * | 2014-01-06 | 2015-07-09 | Lmk Technologies, Llc | Method and apparatus for lining a pipe |
EP3240968B1 (en) * | 2014-12-30 | 2020-09-09 | Nu Flow Technologies 2000 Inc. | Method of installing a liner assembly for pipeline repair or reinforcement |
ES2743776T3 (en) * | 2015-01-08 | 2020-02-20 | Linervent Ab | Coating a ventilation system |
US10584472B2 (en) | 2015-12-18 | 2020-03-10 | Jeffrey Bledsoe | Sewer hose liner and related methods |
US10683959B2 (en) | 2017-10-17 | 2020-06-16 | Lmk Technologies, Llc | Method and apparatus for repairing a length of pipe or a main/lateral pipe junction |
US10386008B2 (en) * | 2018-01-25 | 2019-08-20 | Picote Solutions Oy Ltd. | Installation device |
CN112893339A (en) * | 2021-04-12 | 2021-06-04 | 厦门理工学院 | Civil engineering piping installation |
Citations (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1760750A (en) * | 1928-04-25 | 1930-05-27 | Goodman Patrick | Stopper for gas and water mains |
US3914825A (en) * | 1973-10-25 | 1975-10-28 | Lester A Reynolds | Unidirectional detent for flexible elongated members |
US3958607A (en) * | 1974-08-29 | 1976-05-25 | The Penetryn System, Inc. | Apparatus for sealing pipe leaks |
US4029428A (en) * | 1974-05-31 | 1977-06-14 | Nipak, Inc. | Pipe repair apparatus |
US4167358A (en) * | 1977-10-04 | 1979-09-11 | Besha James A | Open-channel flow control system |
US4207130A (en) * | 1977-07-27 | 1980-06-10 | Trio Engineering Limited | Lining of passageways |
US4245970A (en) * | 1978-10-04 | 1981-01-20 | St Onge Henri S | Apparatus having a tubular inflatable bladder and a grout dispensing nozzle for connecting lateral branches to a relined main |
US4351349A (en) * | 1980-11-10 | 1982-09-28 | Minotti Peter L | Pipe repair kit apparatus and method |
US4366012A (en) * | 1981-02-05 | 1982-12-28 | Insituform International Inc. | Impregnation process |
US4467835A (en) * | 1981-05-27 | 1984-08-28 | Caoutchouc Manufacture Et Plastiques | Shut-off devices |
US4778553A (en) * | 1986-04-16 | 1988-10-18 | Insituform Licensees, B.V. | Method of lining a pipeline with a flexible tubular sleeve |
US4995761A (en) * | 1989-08-23 | 1991-02-26 | Barton Kenneth S | Method and apparatus for repairing ruptures in underground conduits |
US5044405A (en) * | 1989-08-21 | 1991-09-03 | Insituform Licensees B.V. | Method and apparatus for repair-lining of short sections of pipe |
US5167258A (en) * | 1987-11-06 | 1992-12-01 | Nigel Rice | Re-lining of sewers |
US5223189A (en) * | 1992-01-07 | 1993-06-29 | Gundle Lining Systems, Inc. | Method of sealing lateral connections for pipe liners |
US5322653A (en) * | 1992-06-05 | 1994-06-21 | Mueller Hans | Method of repairing buried sewage pipes |
US5329063A (en) * | 1991-05-31 | 1994-07-12 | Get, Inc. | Liner assembly for lining branch pipes and a method for manufacturing the liner assembly |
US5354586A (en) * | 1991-12-06 | 1994-10-11 | Shonan Gosei-Jushi Seisakusho K.K. | Tubular lining material and a method for impregnating the same with a hardenable resin |
US5379802A (en) * | 1991-03-06 | 1995-01-10 | Vanderlans; Gerald J. | Pipeline stopper plug |
US5501248A (en) * | 1994-06-23 | 1996-03-26 | Lmk Enterprises, Inc. | Expandable pipe liner and method of installing same |
US5628345A (en) * | 1994-06-22 | 1997-05-13 | American Pipeline Supply, Corp. | Point repair system for conduits |
US5692543A (en) * | 1992-12-07 | 1997-12-02 | Insituform (Netherlands) B.V. | Lining of lateral pipelines with a liner having a sealing collar |
US5706861A (en) * | 1992-02-13 | 1998-01-13 | Insituform (Netherlands) B.V. | Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder |
US5765597A (en) * | 1994-08-19 | 1998-06-16 | Kiest, Jr.; Larry W. | Apparatus for repairing a pipeline and method for using same |
US5794663A (en) * | 1994-08-19 | 1998-08-18 | Lmk Enterprises | Apparatus for repairing a pipeline and method for using same |
US5855729A (en) * | 1994-08-19 | 1999-01-05 | Lmk Enterprises | Apparatus for providing a tubular material within a pipeline |
US5927341A (en) * | 1993-09-25 | 1999-07-27 | Insituform (Netherlands) B.V. | Lining of "Tees" and "Wyes" in pipelines or passageways |
US5950682A (en) * | 1994-08-19 | 1999-09-14 | Lmk Enterprises, Inc. | Apparatus and method for repairing the junction of a sewer main line and lateral |
US5964288A (en) * | 1995-08-04 | 1999-10-12 | Drillflex | Device and process for the lining of a pipe branch, particuarly in an oil well |
US5964249A (en) * | 1996-03-27 | 1999-10-12 | Lmk Enterprises, Inc. | Apparatus and method for repairing a pipeline |
US6019136A (en) * | 1997-12-04 | 2000-02-01 | Fiberglass Coatings, Inc. | Conduit repair system |
US6024910A (en) * | 1996-06-06 | 2000-02-15 | Shonan Gosei-Jushi Seisakusho K.K. | Method for lining a tubular conduit |
US6039079A (en) * | 1998-07-17 | 2000-03-21 | Lmk Enterprises, Inc. | Apparatus and method for repairing the junction of a sewer main line and lateral pipe |
US6068725A (en) * | 1997-11-26 | 2000-05-30 | Insituform (Netherlands) B.V. | Method of installation of a flexible cured in place lateral seal in an existing main pipeline |
US6276398B1 (en) * | 2000-06-14 | 2001-08-21 | Frederick Lange | Inflatable packer for repairing conduits |
US6568429B2 (en) * | 2001-01-04 | 2003-05-27 | Philip L. Lundman | Pipe sealing apparatus |
US6619886B1 (en) * | 1997-12-02 | 2003-09-16 | Sideliner Enterprises Pty Ltd | System and method for installing formed-in-situ localized repair of pipes and conduits |
US6691741B2 (en) * | 2001-10-05 | 2004-02-17 | Nuflow Technologies (2000) Inc. | Installation assemblies for pipeline liners, pipeline liners and methods for installing the same |
US20040247810A1 (en) * | 2003-06-06 | 2004-12-09 | Mcneil Ronald A. | Reinforcing liner, system and method of reinforcing a structure, and reinforced structure thereby |
US20050133105A1 (en) * | 2003-11-12 | 2005-06-23 | In.Tec S.R.L. | Device and a process for non-destructive repair of a side inlet pipe of a main sewer of a draining pipe |
US7052567B1 (en) * | 1995-04-28 | 2006-05-30 | Verline Inc. | Inflatable heating device for in-situ repair of conduit and method for repairing conduit |
US20060130923A1 (en) * | 2004-12-20 | 2006-06-22 | William Lepola | Method and apparatus for spot repair of pipe |
US7849883B2 (en) * | 2005-05-02 | 2010-12-14 | Nuflow Technologies 2000 Inc. | Liner assembly for pipeline repair and methods of installing same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2870406B2 (en) | 1994-04-11 | 1999-03-17 | 芦森工業株式会社 | Pipe repair materials |
AUPN511095A0 (en) | 1995-08-29 | 1995-09-21 | Barry, Kevin Francis Patrick Jr. | Pipe rehabilitation |
GB9711294D0 (en) | 1997-06-03 | 1997-07-30 | Autotte Jean Bernard | Apparatus and method for lining of passageways |
EP0899420A1 (en) | 1997-08-27 | 1999-03-03 | Shell Internationale Researchmaatschappij B.V. | Method for installing a scrolled resilient sheet alongside the inner surface of a fluid conduit |
US20020083990A1 (en) * | 2001-01-04 | 2002-07-04 | Lundman Philip L. | Method and apparatus for repairing a pipeline |
US6752205B2 (en) * | 2002-04-17 | 2004-06-22 | Tam International, Inc. | Inflatable packer with prestressed bladder |
AU2003232519A1 (en) | 2002-06-18 | 2003-12-31 | Sideliner Enterprises Pty Ltd | Guiding means for installation of formed-in-situ conduit repairs |
WO2013163736A1 (en) * | 2012-05-02 | 2013-11-07 | Nu Flow Technologies 2000 Inc. | Liner assembly for pipeline repair or reinforcement and method of installing same |
-
2005
- 2005-05-02 US US11/120,040 patent/US7849883B2/en active Active
-
2006
- 2006-05-02 EP EP06252321A patent/EP1719946B1/en active Active
- 2006-05-02 DK DK06252321.2T patent/DK1719946T3/en active
- 2006-05-02 ES ES06252321T patent/ES2372255T3/en active Active
- 2006-05-02 AT AT06252321T patent/ATE519983T1/en not_active IP Right Cessation
-
2010
- 2010-12-13 US US12/966,412 patent/US20110100498A1/en not_active Abandoned
-
2013
- 2013-05-09 US US13/890,610 patent/US20130312860A1/en not_active Abandoned
Patent Citations (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1760750A (en) * | 1928-04-25 | 1930-05-27 | Goodman Patrick | Stopper for gas and water mains |
US3914825A (en) * | 1973-10-25 | 1975-10-28 | Lester A Reynolds | Unidirectional detent for flexible elongated members |
US4029428A (en) * | 1974-05-31 | 1977-06-14 | Nipak, Inc. | Pipe repair apparatus |
US3958607A (en) * | 1974-08-29 | 1976-05-25 | The Penetryn System, Inc. | Apparatus for sealing pipe leaks |
US4207130A (en) * | 1977-07-27 | 1980-06-10 | Trio Engineering Limited | Lining of passageways |
US4167358A (en) * | 1977-10-04 | 1979-09-11 | Besha James A | Open-channel flow control system |
US4245970A (en) * | 1978-10-04 | 1981-01-20 | St Onge Henri S | Apparatus having a tubular inflatable bladder and a grout dispensing nozzle for connecting lateral branches to a relined main |
US4351349A (en) * | 1980-11-10 | 1982-09-28 | Minotti Peter L | Pipe repair kit apparatus and method |
US4366012A (en) * | 1981-02-05 | 1982-12-28 | Insituform International Inc. | Impregnation process |
US4467835A (en) * | 1981-05-27 | 1984-08-28 | Caoutchouc Manufacture Et Plastiques | Shut-off devices |
US4778553A (en) * | 1986-04-16 | 1988-10-18 | Insituform Licensees, B.V. | Method of lining a pipeline with a flexible tubular sleeve |
US5167258A (en) * | 1987-11-06 | 1992-12-01 | Nigel Rice | Re-lining of sewers |
US5044405A (en) * | 1989-08-21 | 1991-09-03 | Insituform Licensees B.V. | Method and apparatus for repair-lining of short sections of pipe |
US4995761A (en) * | 1989-08-23 | 1991-02-26 | Barton Kenneth S | Method and apparatus for repairing ruptures in underground conduits |
US5379802A (en) * | 1991-03-06 | 1995-01-10 | Vanderlans; Gerald J. | Pipeline stopper plug |
US5329063A (en) * | 1991-05-31 | 1994-07-12 | Get, Inc. | Liner assembly for lining branch pipes and a method for manufacturing the liner assembly |
US5354586A (en) * | 1991-12-06 | 1994-10-11 | Shonan Gosei-Jushi Seisakusho K.K. | Tubular lining material and a method for impregnating the same with a hardenable resin |
US5223189A (en) * | 1992-01-07 | 1993-06-29 | Gundle Lining Systems, Inc. | Method of sealing lateral connections for pipe liners |
US5706861A (en) * | 1992-02-13 | 1998-01-13 | Insituform (Netherlands) B.V. | Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder |
US5322653A (en) * | 1992-06-05 | 1994-06-21 | Mueller Hans | Method of repairing buried sewage pipes |
US5692543A (en) * | 1992-12-07 | 1997-12-02 | Insituform (Netherlands) B.V. | Lining of lateral pipelines with a liner having a sealing collar |
US5927341A (en) * | 1993-09-25 | 1999-07-27 | Insituform (Netherlands) B.V. | Lining of "Tees" and "Wyes" in pipelines or passageways |
US5628345A (en) * | 1994-06-22 | 1997-05-13 | American Pipeline Supply, Corp. | Point repair system for conduits |
US5501248A (en) * | 1994-06-23 | 1996-03-26 | Lmk Enterprises, Inc. | Expandable pipe liner and method of installing same |
US5794663A (en) * | 1994-08-19 | 1998-08-18 | Lmk Enterprises | Apparatus for repairing a pipeline and method for using same |
US6206993B1 (en) * | 1994-08-19 | 2001-03-27 | Lmk Enterprises, Inc. | Method and apparatus for providing a tubular material within a pipeline |
US5765597A (en) * | 1994-08-19 | 1998-06-16 | Kiest, Jr.; Larry W. | Apparatus for repairing a pipeline and method for using same |
US5950682A (en) * | 1994-08-19 | 1999-09-14 | Lmk Enterprises, Inc. | Apparatus and method for repairing the junction of a sewer main line and lateral |
US20020157784A1 (en) * | 1994-08-19 | 2002-10-31 | Kiest Larry W. | Apparatus for repairing a pipeline and method for using same |
US5855729A (en) * | 1994-08-19 | 1999-01-05 | Lmk Enterprises | Apparatus for providing a tubular material within a pipeline |
US6199591B1 (en) * | 1994-08-19 | 2001-03-13 | Lmk Enterprises | Method of using detachable lines for positioning pipeline repair liner |
US6021815A (en) * | 1994-08-19 | 2000-02-08 | Lmk Enterprises | Method for preparing a repair assembly for pipe repair |
US6105619A (en) * | 1994-08-19 | 2000-08-22 | Lmk Enterprises, Inc. | Apparatus for repairing a pipeline and method for using same |
US7052567B1 (en) * | 1995-04-28 | 2006-05-30 | Verline Inc. | Inflatable heating device for in-situ repair of conduit and method for repairing conduit |
US5964288A (en) * | 1995-08-04 | 1999-10-12 | Drillflex | Device and process for the lining of a pipe branch, particuarly in an oil well |
US5964249A (en) * | 1996-03-27 | 1999-10-12 | Lmk Enterprises, Inc. | Apparatus and method for repairing a pipeline |
US6024910A (en) * | 1996-06-06 | 2000-02-15 | Shonan Gosei-Jushi Seisakusho K.K. | Method for lining a tubular conduit |
US6068725A (en) * | 1997-11-26 | 2000-05-30 | Insituform (Netherlands) B.V. | Method of installation of a flexible cured in place lateral seal in an existing main pipeline |
US6619886B1 (en) * | 1997-12-02 | 2003-09-16 | Sideliner Enterprises Pty Ltd | System and method for installing formed-in-situ localized repair of pipes and conduits |
US6019136A (en) * | 1997-12-04 | 2000-02-01 | Fiberglass Coatings, Inc. | Conduit repair system |
US6039079A (en) * | 1998-07-17 | 2000-03-21 | Lmk Enterprises, Inc. | Apparatus and method for repairing the junction of a sewer main line and lateral pipe |
US6276398B1 (en) * | 2000-06-14 | 2001-08-21 | Frederick Lange | Inflatable packer for repairing conduits |
US6568429B2 (en) * | 2001-01-04 | 2003-05-27 | Philip L. Lundman | Pipe sealing apparatus |
US6691741B2 (en) * | 2001-10-05 | 2004-02-17 | Nuflow Technologies (2000) Inc. | Installation assemblies for pipeline liners, pipeline liners and methods for installing the same |
US7216674B2 (en) * | 2001-10-05 | 2007-05-15 | Nuflow Technologies (2000), Inc. | Installation assemblies for pipeline liners, pipeline liners and methods for installing the same |
US20040247810A1 (en) * | 2003-06-06 | 2004-12-09 | Mcneil Ronald A. | Reinforcing liner, system and method of reinforcing a structure, and reinforced structure thereby |
US7018691B2 (en) * | 2003-06-06 | 2006-03-28 | Poly-Triplex Technologies | Reinforcing liner, system and method of reinforcing a structure, and reinforced structure thereby |
US20050133105A1 (en) * | 2003-11-12 | 2005-06-23 | In.Tec S.R.L. | Device and a process for non-destructive repair of a side inlet pipe of a main sewer of a draining pipe |
US20060130923A1 (en) * | 2004-12-20 | 2006-06-22 | William Lepola | Method and apparatus for spot repair of pipe |
US7523764B2 (en) * | 2004-12-20 | 2009-04-28 | Energy Maintenance Services Group I, Llc | Method and apparatus for spot repair of pipe |
US7849883B2 (en) * | 2005-05-02 | 2010-12-14 | Nuflow Technologies 2000 Inc. | Liner assembly for pipeline repair and methods of installing same |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9453606B2 (en) * | 2007-12-26 | 2016-09-27 | Smart Pipe Company, Inc. | Movable factory for simultaneous mobile field manufacturing and installation of non-metallic pipe |
US9310014B2 (en) | 2009-12-07 | 2016-04-12 | Smart Pipe Company L.P. | Systems and methods for making pipe, and method of installing the pipe in a pipeline |
WO2013163736A1 (en) | 2012-05-02 | 2013-11-07 | Nu Flow Technologies 2000 Inc. | Liner assembly for pipeline repair or reinforcement and method of installing same |
EP2844905A4 (en) * | 2012-05-02 | 2015-12-23 | Nu Flow Technologies 2000 Inc | Liner assembly for pipeline repair or reinforcement and method of installing same |
AU2013255028B2 (en) * | 2012-05-02 | 2017-05-25 | Nu Flow Technologies 2000 Inc. | Liner assembly for pipeline repair or reinforcement and method of installing same |
US9897241B2 (en) | 2012-05-02 | 2018-02-20 | Nu Flow Technologies 2000 Inc. | Liner assembly for pipeline repair or reinforcement and method of installing the same |
Also Published As
Publication number | Publication date |
---|---|
US20060243337A1 (en) | 2006-11-02 |
EP1719946B1 (en) | 2011-08-10 |
ATE519983T1 (en) | 2011-08-15 |
EP1719946A3 (en) | 2009-06-24 |
US7849883B2 (en) | 2010-12-14 |
EP1719946A2 (en) | 2006-11-08 |
ES2372255T3 (en) | 2012-01-17 |
US20130312860A1 (en) | 2013-11-28 |
DK1719946T3 (en) | 2011-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7849883B2 (en) | Liner assembly for pipeline repair and methods of installing same | |
US6691741B2 (en) | Installation assemblies for pipeline liners, pipeline liners and methods for installing the same | |
US9897241B2 (en) | Liner assembly for pipeline repair or reinforcement and method of installing the same | |
AU2002328732A1 (en) | Installation assemblies for pipeline liners, pipeline liners and methods for installing the same | |
US10495249B2 (en) | Means and method for lining a pipe | |
US6708728B2 (en) | Installation of cured in place liners with air and steam and installation apparatus | |
US5706861A (en) | Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder | |
CA2682634C (en) | Bladderless pipeliner and method for using same | |
US6682668B1 (en) | Installation of cured in place liners with an endless reusable inflation bladder and installation apparatus | |
EP3240968B1 (en) | Method of installing a liner assembly for pipeline repair or reinforcement | |
AU2007231809B2 (en) | Liner assembly for pipeline repair and methods of installing same | |
CA2505939C (en) | Liner assembly for pipeline repair and methods of installing same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |