阅读说明：本技术 用于恢复受损管的组件 (Assembly for rehabilitating damaged pipe ) 是由 克林顿·爱德华·卢埃林 阿尔弗雷德·G·赫林 博迭·J·伊桑哈尔特 约翰·哈里·坎姆普 于 2017-01-31 设计创作，主要内容包括：提供了一种用于恢复受损管(22)的组件。可膨胀管(20)包括由热塑性聚氨酯形成的衬里(24)和施加至衬里(24)的外表面(26)的浆料(30)。外表面(26)包括多个扩张梢端(34)和凹槽(28),并且每个凹槽(28)位于相邻的扩张梢端(34)之间。浆料(30)设置在衬里(24)的扩张梢端(34)上和凹槽(28)中。用于恢复受损管(22)的方法包括将带有浆料(30)的衬里(24)夹持在用以防止碎屑进入衬里(24)内部的具有U形横截面的拉出器-密封器固定装置上,以及拉动拉出器-密封器固定装置和衬里(24)穿过受损管(22)。浆料(30)在暴露于湿气、紫外线辐射、热和/或超声波时体积膨胀并且填充由于腐蚀、侵蚀或其他情况引起的沿着管道内表面的裂缝或其他缺陷和空隙。(An assembly for rehabilitating a damaged tubular (22) is provided. The expandable tubular (20) includes a liner (24) formed of thermoplastic polyurethane and a slurry (30) applied to an outer surface (26) of the liner (24). The outer surface (26) includes a plurality of flared tips (34) and grooves (28), and each groove (28) is located between adjacent flared tips (34). The slurry (30) is disposed on the expanded tip (34) of the liner (24) and in the groove (28). A method for rehabilitating a damaged pipe (22) includes clamping a liner (24) with a slurry (30) to a puller-sealer fixture having a U-shaped cross-section to prevent debris from entering the interior of the liner (24), and pulling the puller-sealer fixture and the liner (24) through the damaged pipe (22). The slurry (30) expands in volume and fills cracks or other defects and voids along the inner surface of the pipe caused by corrosion, erosion, or other conditions when exposed to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.)

1. An expandable tubular for use in restoring a damaged tubular, comprising:

a liner formed from a polymer-based material and/or an elastomer-based material, the liner comprising a plurality of fibers,

the liner includes an outer surface and a liner body,

the outer surface of the liner includes a plurality of grooves,

a slurry disposed in the grooves of the liner, an

The slurry is capable of expanding in size upon exposure to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

2. A method of manufacturing an expandable tubular for rehabilitating a damaged tubular, comprising the steps of:

extruding a liner formed of a polymer-based material and/or an elastomer-based material and comprising a plurality of fibers, the extruded liner comprising an outer surface having a plurality of grooves, and

a slurry is disposed in the grooves of the liner and the slurry is dimensionally expandable upon exposure to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

3. A method of restoring damaged pipe comprising the steps of:

providing a liner formed of a polymer-based material and/or an elastomer-based material, the liner comprising an outer surface,

applying a slurry to the outer surface of the liner,

the liner is placed on a puller-sealer attachment having a U-shaped cross-section,

pulling the puller-sealer attachment and liner with the slurry through the damaged pipe, an

Exposing the slurry on the outer surface of the liner to moisture, ultraviolet radiation, heat and/or ultrasonic waves,

the exposing step causes the slurry to expand and contact an inner diameter surface of the damaged tubular.

4. The method of claim 3, wherein the cross-section of the puller/sealer fixture does not include sharp edges, and the puller/sealer fixture holds the liner in place while pulling the liner through the damaged pipe.

5. The method of claim 3, wherein the outer surface of the liner comprises a plurality of expanded tips and grooves, each groove located between adjacent expanded tips, each of the expanded tips of the liner comprising a stem portion extending perpendicular to a base of the liner and an expanded top portion expanding outwardly relative to the stem portion, the expanded top portion having a width greater than a width of the stem portion.

6. The method of claim 3, wherein the step of pulling the puller-sealer fixture and liner with the slurry through the damaged pipe comprises pulling the puller-sealer fixture attached to a rolling cart by a cable.

7. The method of claim 3, wherein the liner is secured to the puller/sealer securement device by a clamp that prevents debris, moisture, and/or the slurry from entering an interior of the liner.

8. The method of claim 3, wherein the step of applying the slurry to the outer surface of the liner comprises applying an unactivated liquid polyurethane slurry to the outer surface, the slurry further comprising a 2-part urethane slurry, and further comprising the step of spraying the 2-part urethane slurry onto the inner diameter surface of the damaged pipe while the puller-sealer fixture and liner are pulled through the damaged pipe, the 2-part urethane slurry comprising polyurethane and a curing agent.

9. The method of claim 8, wherein the step of spraying comprises spraying the 2-part urethane slurry through a spray head attached to the rolling cart in front of the liner, the spray head receiving two feed lines running along the cable, one of the feed lines including the urethane and the other feed line including the curing agent.

10. The method of claim 3, wherein applying the unactivated liquid polyurethane slurry to the outer surface of the liner comprises directing the liner through a dip tank assembly containing the slurry.

11. The method of claim 3, comprising exposing the slurry to moisture, ultraviolet radiation, heat, and/or ultrasonic waves such that the volume expansion of the slurry is between 1% and 1000%, the slurry curing and adhering to the liner and the inner diameter surface of the damaged pipe.

12. The method of claim 3, wherein the step of providing the liner comprises extruding a flat sheet of a polymer-based material and/or an elastomer-based material and welding the flat sheet to form the liner.

13. The method of claim 3, wherein providing the liner comprises extruding the liner from a thermoplastic polyurethane comprising fibers, the thermoplastic polyurethane being transparent,

the outer surface of the liner comprising a plurality of expanded tips and grooves, each groove located between adjacent expanded tips located along the entire outer surface of the liner and continuously around the outer circumference of the liner, each of the expanded tips of the liner comprising a stem portion extending perpendicular to a base of the liner and an expanded top portion expanded outwardly relative to the stem portion, the expanded top portion having a width greater than a width of the stem portion,

the step of extruding the liner is performed through an extrusion die that produces a flat plate made of the thermoplastic polyurethane containing fibers,

the step of providing the liner further comprises welding the flat sheets to produce the liner having a diameter when the liner is inflated that is less than a diameter of the inner diameter surface of a host pipe,

the liner has a diameter of 6 inches to 12 inches when the liner is inflated,

the cross-section of the puller/sealer fixture not including sharp edges, the puller/sealer fixture holding the liner in place while pulling the liner through the damaged pipe,

the step of applying the slurry to the outer surface of the liner comprises disposing non-activated liquid polyurethane slurry on the expanded tip and in the groove, the expanded tip and the groove retaining the non-activated liquid polyurethane slurry on the outer surface of the liner during the step of pulling the liner through the damaged pipe,

the liquid unactivated polyurethane slurry comprises fibers and expands in volume from 1% to 1000% upon exposure of the slurry to moisture,

the step of disposing the unactivated liquid polyurethane grout on the flared tip and in the groove comprises applying the unactivated liquid polyurethane grout to the outer surface of the liner while the liner is flat, the unactivated liquid polyurethane grout being cured by moisture,

the step of disposing the unactivated liquid polyurethane grout on the expansion tip and in the groove comprises directing the liner through a dip tank assembly containing the unactivated liquid polyurethane grout,

the dip tank assembly includes a coating tank that uses a series of rollers formed of ultra-high density polyurethane to guide the liner through the unactivated liquid polyurethane slurry,

the coating tank is made of aluminum and comprises a removable top and a drain,

the dip tank assembly further includes a mixing tank formed of aluminum that provides a reservoir for the unactivated liquid polyurethane slurry and supplies the unactivated liquid polyurethane slurry to the coating tank,

the step of pulling the puller-sealer fixture and the liner with the slurry through the damaged pipe comprises pulling the puller-sealer fixture attached to a rolling trolley by a cable,

the puller/sealer anchor is a solid piece of material and has no sharp edges along the liner,

the liner is secured to the puller/sealer fixture by a clamp that prevents debris, moisture, and/or the slurry from entering the interior of the liner,

and further comprising spraying a 2-part urethane slurry onto the inner diameter surface of the damaged pipe while pulling the puller-sealer fixing device and the liner through the damaged pipe, the 2-part urethane slurry comprising polyurethane and a curing agent,

the spraying step comprises spraying the 2-part urethane slurry through a spray head attached to the rolling cart in front of the liner, the spray head receiving two feed lines running along the cable, one of the feed lines comprising the urethane and the other feed line comprising the curing agent,

mixing the urethane and the curing agent before spraying the 2-part urethane on the inner diameter surface of the damaged pipe,

the slurry comprises a mixture of the non-activated liquid polyurethane slurry located on the outer surface of the liner and the 2-part urethane slurry located on the inner diameter surface of the damaged pipe,

and further comprising the steps of capping an end of the liner and inflating the liner to a specific pressure after spraying the 2-part urethane on the inner diameter surface of the damaged pipe,

the step of exposing includes exposing the slurry to moisture such that the volume of the slurry expands 1% to 1000%, the slurry cures and adheres to the liner and the inner diameter surface of the damaged pipe, and

releasing the pressure of the inflated liner after the slurry is cured.

14. The method of claim 3, wherein the step of providing the liner comprises extruding the liner from a thermoplastic material, the slurry applied to the outer surface of the liner being in the form of a foam, and the slurry forming an adhesive or cohesive bond with the extruded liner, such that the liner and the slurry do not require multiple flared tips on the outer surface of the extruded liner to remain in contact.

Technical Field

The present invention relates to products and methods for restoring damaged pipes.

Background

Slurries are commonly used to repair the inner surface of corroded, cracked, or otherwise damaged pipes. A method of repairing a metal pipe includes coupling short links of a stainless steel sleeve to one another to form a liner and pulling the stainless steel liner through the metal pipe with a cable to present a small annular space between the stainless steel liner and the metal pipe. The slurry is then pumped into the annular space to fill the annular space and the cracks in the metal pipe. However, this approach involves significant material and labor costs. Furthermore, in the above-described methods and other methods currently in use, it is difficult to control the placement of the slurry. Typically, the slurry is unevenly disposed along the damaged pipe and does not fill all cracks of the pipe.

Another recently developed method of repairing damaged pipes with slurries involves the use of expandable tubulars. The expandable tubular includes a liner and a slurry disposed in a groove along an outer surface of the liner. A liner with slurry is placed in the opening of the damaged pipe and then exposed to moisture such that the slurry expands and engages the inner surface of the damaged pipe.

The grooves of the liner allow the expandable tubular to be folded to facilitate transport of the expandable tubular. The grooves also provide flexibility for manipulating the expandable tubular near bends in the damaged tubular. The grooves of the liner also allow for control of the placement of slurry along the outer surface of the liner and the amount of slurry. The grooves maintain the placement of the slurry when the liner is disposed in a damaged pipe. The slurry expands to engage the inner surface of the damaged pipe and fill cracks, holes, notches or other imperfections and voids along the inner surface of the pipe caused by corrosion, erosion or other conditions. In other words, the expandable pipe lines the inner surface of the damaged pipe. The inflatable tube also provides a seal for the conduit and prevents water and debris from entering the conduit. The slurry of expandable tubular may also expand through the hole in the pipe and fill voids in the soil surrounding the pipe. Expandable tubulars are a cost effective and convenient method of repairing and restoring various types of pipes such as sewer pipes, drinking water pipes, electric gas pipes and air pipes. An example of an expandable tubular is provided in U.S. patent No.7,942,167.

Disclosure of Invention

One aspect of the present invention provides an expandable tubular for rehabilitating a damaged tubular. The expandable tube includes a liner formed of thermoplastic polyurethane and having an outer surface. The outer surface of the liner includes a plurality of flared tips and grooves, and each groove is located between adjacent flared tips. The grout is disposed on the flared tip and in the groove of the liner. The slurry is capable of expanding in size upon exposure to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

According to another embodiment, the expandable tubular comprises a liner formed of a polymer-based material and/or an elastomer-based material, and the liner comprises a plurality of fibers. The liner includes an outer surface, and the outer surface of the liner includes a plurality of grooves. The slurry is disposed in the grooves of the liner and the slurry is capable of expanding in size when exposed to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

Another aspect of the present invention provides a method of manufacturing an expandable tubular for rehabilitating a damaged tubular. The method includes extruding a liner from thermoplastic polyurethane, wherein the extruded liner includes an outer surface having a plurality of flared tips and grooves, each groove located between adjacent flared tips. The method further includes disposing a slurry on the flared tip and in the groove of the liner, wherein the slurry is capable of expanding in size upon exposure to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

According to another embodiment, a method of manufacturing an expandable pipe for rehabilitating a damaged pipe includes extruding a liner formed from a polymer-based material and/or an elastomer-based material and including a plurality of fibers, wherein the extruded liner includes an outer surface having a plurality of grooves. The method also includes disposing a slurry in the grooves of the liner, wherein the slurry is capable of expanding in size upon exposure to moisture, ultraviolet radiation, heat, and/or ultrasonic waves.

Yet another aspect of the invention provides a method of restoring a damaged tubular. The method comprises the following steps: providing a liner formed of a polymer-based material and/or an elastomer-based material, the liner comprising an outer surface; and applying the slurry to the outer surface of the liner. The method also includes placing the liner on a puller-sealer attachment having a U-shaped cross-section and pulling the puller-sealer attachment and the liner with the slurry through the damaged pipe. The method further includes exposing the slurry on the outer surface of the liner to moisture, ultraviolet radiation, heat, and/or ultrasonic waves, the exposing causing the slurry to expand and contact the inner diameter surface of the damaged pipe.

Drawings

Other advantages of the present invention will be readily appreciated, as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:

FIG. 1 is a cross-sectional view of a portion of a liner according to an exemplary embodiment of the present invention;

FIG. 2 is a cross-sectional view of an entire liner disposed inside a parent pipe according to an exemplary embodiment of the present invention;

FIG. 3 is a cross-sectional view of a puller-sealer fixture disposed inside a main pipe, the puller-sealer fixture configuring a liner to pass through the main pipe with minimal interference with an inner diameter of the main pipe and sealing the inner diameter of the liner from water, debris, and slurry;

FIG. 4 illustrates a puller-sealer fixture attached to a spray fixture and rolling cart for installing a liner in a main pipe;

FIG. 5 illustrates an example of a dip tank assembly for coating a liner with a 1-part moisture cure urethane slurry in accordance with an example embodiment; and

fig. 6 includes exemplary specifications for a coating tank and a mixing tank of a dip tank assembly according to an exemplary embodiment.

Detailed Description

An expandable pipe 20 for restoring a damaged pipe 22, also referred to as a parent pipe, is shown in fig. 1-13 of related U.S. provisional patent application No. 62/289760. The damaged pipe or parent pipe 22 is a pipe located in the ground that requires refurbishment. For example, the expandable pipe 20 may be used to repair or restore various types of pipes or main pipes 22, such as water pipes, gas pipes, oil pipes, sewer pipes, potable water pipes, electrical pipes, and air pipes.

The expandable tubular 20 includes an improved liner 24 formed from a polymer-based material and/or an elastomer-based material toAnd a slurry 30 applied to the outer surface 26 of the liner 24. The outer surface 26 of the liner 24 may include grooves 28 or contoured surfaces to hold the slurry 30 in place while the liner 24 is disposed in the parent pipe 22. The size D of the slurry 30 when exposed to or in contact with moisture, Ultraviolet (UV) radiant heat, and/or ultrasonic waves₁Such as volume expansion. Moisture, ultraviolet radiation, heat, and/or ultrasound can also cure the slurry 30. Thus, after such exposure, the slurry 30 contacts the inner diameter surface of the damaged parent pipe 22 and fills the voids in the damaged parent pipe 22. The volume of the slurry 30 after expansion is 1% to 1000% greater than the volume of the slurry 30 before expansion. The slurry 30 then hardens to restore the integrity of the host pipe 22. In addition to the embodiment described in U.S. provisional patent application No.62/289760, there may be several other embodiments that are described herein with reference to fig. 1-4 of the present application.

As described above, the liner 24 is formed from a polymer-based material and/or an elastomer-based material. The liner 24 may be formed from a single polymer-based material or an elastomeric-based material, such as a thermoplastic material. Alternatively, the liner 24 may include more than one polymer and/or elastomer. According to an exemplary embodiment, the liner 24 is extruded from a transparent Thermoplastic Polyurethane (TPU). The transparent liner 24 is preferably used for viewing purposes to view the interior of the damaged parent pipe 22 being restored, for example using a video camera. However, the liner 24 may be another color and need not be transparent to function as intended. The liner 24 may also have another composition. For example, the liner 24 may be formed from any foldable and then expandable material, not limited to TPU. For example, the liner 24 may be formed from polyethylene or any medium density plastic. The liner 24 may optionally include fibers in the polymer-based material and/or the elastomer-based material, at least in the thin base of the liner 24, to increase strength and prevent bulging of the liner 24. For example, the liner 24 may include a combination of various polymers and/or elastomers and reinforcing fibers. The visual clarity of the TPU allows for easy video recognition of the side entry points to allow for trimming of the liner 24. After installation of the liner 24 in the parent pipe 22, the inner diameter surface 32 of the liner 24, which is located opposite the outer surface 26, is smooth.

According to a preferred embodiment, the grooves 28 of the liner 24 are realized by a profile on the outer surface 26 of the liner 24, also referred to as the outer diameter surface, as shown in fig. 1 and 2. In the embodiment of fig. 1 and 2, the profile of the outer surface 26 of the liner 24 includes an expanded tip 34, the expanded tip 34 serving as a mechanical lock for the slurry 30 applied to the outer surface 26 of the liner 24. Although fig. 1 shows the expanded tip 34 along only a portion of the outer surface 26 of the liner 24, the expanded tip 34 is preferably positioned along the entire outer surface 26 of the liner 24 and continuously around the periphery of the liner 24. In the example of fig. 1 and 2, each groove 28 is formed between two adjacent flared tips 34, and the slurry 30 is contained in these grooves 28. The flared tip 34 includes a stem portion 36 extending perpendicular to the base of the liner 24 and an outwardly flared tip 38 relative to the stem portion 36. The enlarged top 38 has a diameter or width greater than the diameter or width of the stem portion 36. The expanded tip 34 shown in fig. 1 and 2 is merely an example, as the shape and size of the expanded tip 34 may vary. Alternatively, other shaped shapes and sizes may be used to implement the recess 28 in the liner 24. However, if sufficient bonding is achieved between the liner 24 and the slurry 30, there is no need to expand the tip 34 or other mechanical locking feature.

The liner 24 may be formed by extrusion, preferably in a flat extrusion die, to produce a flat product, such as a TPU sheet or a sheet of another thermoplastic material. The flat extruded product is then welded into a round tube shape to create a liner 24 to be left within the main tube 22, as shown in fig. 2. In other words, the flat product is welded at its circumference matching the desired diameter of the liner 24. The diameter of liner 24 when liner 24 is inflated should be less than the inner diameter of parent pipe 22. For example, the liner 24 of the exemplary embodiment has an inner diameter of 7.5 inches when inflated, and the main tube 22 has an inner diameter of 8 inches. The liner 24 may be extruded to size as a round tube, but some raw materials are difficult to extrude into round geometries due to lack of melt strength. Another advantage of extruding flats and welding is that any diameter can be achieved with limited tooling.

According to an exemplary embodiment, during installation of the liner 24 in the host pipe 22, a slurry 30, preferably a urethane slurry such as an unactivated liquid polyurethane, is applied to the outer surface 26 of the liner 24. The slurry 30 may optionally contain fibers to increase strength. At this point, the liner 24 is folded flat for installation. Before the liner 24 enters the host pipe 22, the outer surface 26 of the liner 24 is coated with a 1-part moisture cure urethane slurry. This slurry 30 solidifies and expands during installation, adhering to the TPU liner 24 and the parent pipe 22.

As will be discussed further below, in an exemplary embodiment, a 2-part urethane slurry is sprayed onto the inner diameter surface of the host pipe 22 during installation. In other words, the urethane slurry is sprayed onto the inside diameter surface of the main pipe 22 during installation, and as the TPU liner 24 is pulled through the main pipe 22 by the cable 40 and the rolling trolley 42, a set of mixing/spraying heads 44 mounted to the rolling trolley 42 (just in front of the liner 24 as the liner 24 is pulled through the main pipe 22) sprays a coating of 2-part urethane slurry (optionally including entrained fibers) onto the inside diameter surface of the main pipe 22. The 2-part urethane slurry includes 1-part urethane and 1-part curing agent. The 1-part expanded urethane grout applied to the outer surface 26 of the liner 24 before the liner 24 enters the parent pipe 22, in combination with the 2-part expanded urethane grout sprayed onto the inner diameter surface of the parent pipe 22 as the liner 24 is pulled through the parent pipe 22, serves to provide a high strength and high adhesion interface between the liner 24 and the parent pipe 22 and at the same time also migrates and expands to fill any cracks, voids, or defects in the parent pipe 22 or adjoining service lines.

A method of installing the liner 24 in the parent pipe 22 according to an example embodiment will now be described in more detail with reference to fig. 3 and 4. When the TPU liner 24 is ready for installation, the TPU liner 24, laid flat like a fire hose, is wound onto a reel. At the job site where the host pipe 22 is located, the liner 24 is directed through a dip tank assembly 56 containing a 1-part moisture curing urethane slurry. FIG. 5 illustrates a liner 24 being directed through an immersion tank assembly 56 in accordance with an exemplary embodiment. The dip tank assembly 56 enables the liner 24 to be uniformly coated with a 1-part moisture curable urethane slurry, such as an unactivated liquid polyurethane. The dip tank assembly 56 is also capable of applying a 1-part moisture cured urethane slurry to a liner 24 having a diameter of 2 inches to 20 feet, such as 6 inches to 12 inches in diameter. The dip tank assembly 56 is structurally robust and easy to maintain and repair and has a portable nature. As shown in fig. 5, the dip tank assembly 56 includes an application tank 58, the application tank 58 guiding the liner 24 through the liquid polyurethane using a series of vertical rollers 60 and horizontal rollers 60. The guide rollers G serve to guide the liner 24 from the supply into the coating tank 58 and, in turn, to guide the coated liner 24 from the coating tank 58 to the manhole where the liner 24 will be used to repair the damaged pipe 22. Coating slot 58 is typically formed of aluminum and includes a removable top 62 and a drain 64. However, the design and material used to form coating slot 58 may vary. The roller 60 is typically formed of ultra-high density polyurethane. However, the impregnation tank assembly 56 may include a different array of rollers 60, and/or the rollers 60 may be formed of a different material. The dip tank assembly 56 also includes a mixing tank 66 that serves as a reservoir for: which is used to supply additional liquid polyurethane to the coating tank 58 as needed to maintain the liquid level in the coating tank 58. The mixing tank 66 may also be formed of aluminum or other material. Exemplary specifications for the coating tank 58 and the mixing tank 66 are provided in fig. 6. These specifications are generic in nature and may be adjusted as needed prior to manufacturing the dip tank assembly 56.

The TPU liner 24 is directed downwardly into the opening of the main pipe 22 with its outer surface 26 soaked in urethane slurry. As shown in fig. 3 and 4, the TPU liner 24 is attached to the jet fixture 46 at the opening via a puller-sealer fixture 48. The puller-sealer fixture 48 is a solid piece of material that serves as a mounting fixture, and the puller-sealer fixture 48 configures the liner 24 to optimally pass through the main pipe 22 with minimal interference with the inner diameter surface of the main pipe 22. In an exemplary embodiment, the puller-sealer fixture 48 has a U-shaped cross-section and is free of sharp edges. The puller-sealer fixture 48 holds the liner 24 in place without any sharp edges along the liner 24. In an exemplary embodiment, the puller-seal retainer device 48 has an outer perimeter of 23.560 inches, which is equal to the length of the 7.5 inch inner diameter liner 24. A clamp or grip 50 may be used to secure the liner 24 to the puller-sealer securement device 48. The puller-sealer fixture 48 also prevents debris, moisture, and/or slurry 30 from entering the interior of the liner 24. For example, the clamp 50 may tightly secure the liner 24 against the puller-sealer fixture 48 to prevent debris, moisture, and/or slurry 30 from entering the interior of the liner 24. During installation, the puller-sealer fixture 48 is attached to the rolling cart 42 and pulled through the parent pipe 22 by the cable 40.

A set of mixing/jetting heads 44 is also attached to the cart 42 and the set of mixing/jetting heads 44 is pulled through the main tube 22 during installation. The mixing/spraying head 44 receives two urethane slurry feed lines 52, 54 routed from the pulling side, such as along a cable, and the mixing/spraying head 44 mixes the 2-part slurry before spraying the mixture onto the inner diameter surface of the main pipe 22. One feed line 52 includes urethane and a second feed line 54 includes a curative. The rate of flow into the mixing/spray head 44 will be automatically controlled based on the speed of the cart 42 and the entire assembly through the main customer 22 to ensure consistent coating of the main pipe 22 at all times. Thus, the area between liner 24 and primary tube 22 is filled with both 1-part urethane and 2-part urethane slurry. Once the full length of the TPU liner 24 has been pulled through the main pipe 22, the ends of the liner 24 are capped and the liner 24 is inflated to a specified pressure. The slurry 30 is exposed to moisture, ultraviolet radiation, heat, and/or ultrasonic waves and thus cures and expands to adhere to the liner 24 and the inner diameter surface of the damaged pipe 22. The slurry 30 is generally in the form of a foam and adheres to the extruded liner 24 forming an adhesive bond and preferably an adhesive bond such that the liner 24 and slurry do not require the plurality of flared tips 34 to remain in contact. After a suitable curing period, the pressure inside the liner 24 is released. The end of the liner 24 may then be trimmed as well as the access point to the side (service line).

Obviously, many modifications and variations of the present invention are possible in light of the above teachings, and may be practiced otherwise than as specifically described, within the scope of the appended claims.