WO2007134416A2 - Protective ducting and method for the installation of same - Google Patents

Protective ducting and method for the installation of same Download PDF

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Publication number
WO2007134416A2
WO2007134416A2 PCT/BR2007/000121 BR2007000121W WO2007134416A2 WO 2007134416 A2 WO2007134416 A2 WO 2007134416A2 BR 2007000121 W BR2007000121 W BR 2007000121W WO 2007134416 A2 WO2007134416 A2 WO 2007134416A2
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WO
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Application
Patent type
Prior art keywords
module
pipe
cable
line
modules
Prior art date
Application number
PCT/BR2007/000121
Other languages
French (fr)
Other versions
WO2007134416A3 (en )
Inventor
Fabio Santos
Luis Santos
Sidnei Cabral
Ernesto Ferreira F.
Original Assignee
Petropasy Tecnologia Em Poliuretanos Ltda.
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/22Pipes composed of a plurality of segments
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12Laying or reclaiming pipes on or under water
    • F16L1/123Devices for the protection of pipes under water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00Protection of pipes or objects of similar shape against external or internal damage or wear

Abstract

A protective ducting for pipes, cables or lines (2) comprising at least one module (100) is described, each of said modules (100) comprising a generally cylindrical body (1) involving the pipe, cable or line thereby to form an enclosed cylindrical inner channel (4) for housing the said pipe, cable or line (2), said body (1) being provided with one single longitudinal split (41), a tip-shaped end and a bag-shaped end, said body (1) being further provided with an internal cavity (31) for housing one single metal tension band (32) per module (100), said cavity (31) having two open ends so that the said tension band (32) can pass through the said cavity (31) of an adjacent module (100) in order to secure a first module (100) to a second module (100), at least a portion of said tension band (32) being so contained and protected in the interior of said body (1); and an element (33) for locking said metal tension band (32) and impart stability to said modules (100) on the pipe, cable or line (2 )to be protected. The method for the installation of modules (100) forming the protective ducting for pipes, cables or lines (2) is also described.

Description

PROTECTIVE DUCTING AND METHOD FOR THE INSTALLATION OF SAME FIELD OF THE INVENTION

The present invention relates to protecting ducting for pipes, cables, lines and other elongated members submitted to close contact with abrasive materials. More specifically, the invention relates to protecting ducting for various elongated members, the ducting being formed by combining several modules, the geometry of the resulting ducting providing improved protection to such members when submitted to contact with abrasive materials which are a source of wear and possible tearing of the member to be protected. BACKGROUND INFORMATION

Whenever pipes, cables or lines are positioned in their working place, it is desirable to protect them from any physical harm. In this respect the marine environment for example is particularly demanding. Thus in the petroleum industry pipes such as the risers employed for example for bringing hydrocarbons up to the surface and injecting fluid in a well can be submitted to displacements relative to the marine bed and require protection for the resulting abrasion. Other marine materials or several debris resulting from the marine exploration activity itself can be the source of damage to the protecting device already used. Depending on the depth at which such pipe is positioned, throughout the years such damage can attain the pipe itself by damaging its outer layer, reducing thickness and jeopardizing safety and pipe performance. When damage reaches the pipe outer layer, there is the need to replace it, which involves rather high costs resulting from stopping hydrocarbon pumping, ship rental and a new pipe cost besides the man power required for the replacement. Other conditions for pipes at the surface or in land subsoil can submit them to abrasion stresses similar to those encountered by lines and pipes positioned in the sea bottom. In order to remediate this situation, the present technology provides a resistant, segmented protective ducting or outer ducting for protecting such pipes, cables, lines or like elongated members submitted to such stresses. One example of protective ducting is described in GB 2260590. Such device comprises cladding components or sections made up of semi-tubular molded plastic mounted around the pipe, cable or line, each component having an inner face shaped so as to contact the corresponding face of a diametrically opposed component, the two inner faces defining together an enclosed cylindrical channel along the length of the protecting ducting for the pipe, cable or line. Complementary fittings of the spigot and faucet kind such as nipples and corresponding cavities formed on confronting parts of the inner faces aid in the correct alignment of the components one relative to each other. Connecting means are provided in order to releasably secure the two halves of the protective ducting or cladding. Usually said connecting means or tensioning bands are embedded in a shallow recess formed extending along the circle of the outer portion of the protecting cladding components. Tensioning bands are normally metallic and are tensioned and tightened according to known methods using a locking element. It is known to form a shallow recess or "bag" in an outer region of the protective ducting, the "bag" being far from the coupling line where the cladding meets its diametrically opposed counterpart where the locking element of the metal band rests. This makes the tensioning and waving easier and provides some protection against damage to said locking element. In spite of the relative technical and commercial suitability revealed by the protecting cladding or ducting of the above described kind it is desirable to develop protective cladding for pipes, cables or lines of improved useful life, combined to lower possibilities of cladding failure caused by physical damage during use.

Thus, GB 2276694 relates to a pipe or cable ducting for protecting any like elongate member, the ducting being made up of two groups of semi-tubular plastic interconnectible sections (12), each group of sections forming approximately half of the ducting, each group being provided with connecting means which may be released comprising a plurality of round ended projections or bosses (28) and a plurality of equally-spaced, oval recesses (30). Each recess is longer in the longitudinal direction of the elongated section, so as to provide a limited amount of freedom in that direction, this permitting greater flexing of the ducting. When two semi-tubular sections (12) are placed with their concave surfaces one in front of the other, the round ended projections (28) along one edge of the sections are adapted to be fitted in recesses (30) at the corresponding edge of the other section. GB 2388640 describes a protective ducting or cladding comprising a plurality of interconnectible elongated ducting components which when assembled define an elongate, longitudinally extending internal channel for receiving a pipe, cable or like elongate member, each ducting component having a shaped inner face with a longitudinal recess such that the components can be assembled with confronting inner faces, their respective longitudinal recesses being thereby aligned to form the channel, the ducting further comprising tension bands for securing assembled pairs of components one to the other, wherein each ducting component is provided with a transversely extending internal cavity for receiving a tension band, the cavity having two open ends so that the band can pass through the internal cavity of one ducting component and through a corresponding internal cavity of an adjacent ducting component in order to secure one to the other, at least part of the band being thereby contained and protected within the cavities.

In spite of the benefits of the technology object of GB 2388640, the geometry of the proposed ducting having two interconnecting faces and being assembled by a certain number of tension bands along the set of protective ducting can lead to failure when the pipe, cable or line is positioned in deep waters on aggressive substrates as relates abrasion and tear, this causing the entrance of undesirable material through the connection of the two faces, as well as in the interface of the pipe and the ducting, with consequent damage to the protective ducting. Still, the proposed device requires a relatively large number of tension bands, which makes it rather costly due to the larger number of tension bands and the need to assemble such increased number, which ultimately leads to longer ship rental period and manpower. Contrary to state-of-the-art devices, the present invention discloses a protective ducting for elongated members in general, such members being positioned in aggressive environments as regards abrasion, such as pipes, cables or lines in marine environments or others of similar conditions, the device of the invention comprising one or more modules or elements combined in series to form the proposed device. Such device dispenses with the two-half structure and utilizes instead, a sleeve-like structure having one single longitudinal split, each module containing slots and bulges allowing fitting between contiguous modules and one single metal tension band per module. In this way it is possible to avoid the entrance of foreign solid elements between the protective ducting and the pipe, cable or line with the consequent increase in the useful life of the protective ducting as well as that of the pipe, cable or line.

Besides, the lower number of tension bands per length unit of protective ducting reduces the number of operations required for securing the tension bands, this reducing the overall installation cost of the inventive protective ducting relative to similar state-of-the-art devices.

Therefore, in spite of the developments of the technique, there is still the need of a protective ducting for elongated members such as pipes, cables or lines, such members being positioned in subsea or land environments where they are submitted to abrasion stresses, the protective ducting or device comprising one or more sleeve-shaped modules around the member to be protected, each module being provided with a longitudinal split, inner tension band and where one module can be coupled to the adjacent one since it is provided with slots and bulges that fit each other, such protective ducting being described and claimed in the present application. SUMMARY OF THE INVENTION

Broadly, the protective ducting for elongated members such as pipes, cables or lines according to the invention is made up of at least one, or alternatively by the combination of two or more modules, each of such modules comprising: a) a generally cylindrical body involving the pipe, cable or line to be protected thereby to form an enclosed cylindrical inner channel for housing the said pipe, cable or line to be protected, said body being provided with one single longitudinal split, a tip-shaped end and a bag-shaped end, said body being further provided with an internal cavity for housing one single metal tension band per module, said cavity having two open ends so that the said tension band can trespass from one end to the other and be secured, enabling structural stability to said body, at least a portion of said tension band being so contained and protected in the interior of said body; and b) an element for locking said metal tension band and imparting stability to said modules on the pipe, cable or line to be protected. And the method for installing said protective ducting comprises the steps of: a) at first, providing a stopper to the pipe, cable or line to be protected, b) providing a first module having a single longitudinal split, a tip-shaped end and a bag-shaped end and an internal cavity for housing a metal tension band; c) opening said first module with the aid of a mechanical device and fitting said module in the said pipe, cable or line to be protected; d) positioning said first module so that the tip-shaped end has the direction of the launching of the said pipe, cable or line; e) fitting said module in the said pipe, cable or line to be protected; f) closing said mechanical device, accommodating the said first module in the said pipe, cable or line and withdrawing the said mechanical device; g) opening a second module with the aid of the same mechanical device and fitting said second module in the said pipe, cable or line, the tip-shaped end being in the direction of the launching of the said pipe, cable or line; h) pushing the said second module into the first module housing until the two parts fit together forming externally a single surface; i) with the aid of the said mechanical device, securing the said tension band of the first connection made; and j) preparing the next module to be installed as described in step f), and repeating the same operation successively until the ducting of the specified length of the said pipe, cable or line is complete.

Thus, the invention provides a protective ducting for elongated members positioned in subsea or land environments, such members being submitted to abrasion stresses, the ducting being shaped as one or more modules which wrap said elongated members, each module being provided of one single longitudinal split and an internal cavity for one single tension band per module, the modules being provided with recesses and bulges for making easier the fitting of the modules in series. The invention further provides a method for the installation of the said protective ducting for elongated members positioned in subsea or land environments and submitted to abrasion stresses, said method comprising, in a pipe, cable or line provided with a stopper, opening a first module with the aid of a mechanical device, positioning the said module so that the tip-shaped end is turned towards the direction of launching of the said pipe, cable or line, fitting the same in the pipe, cable or line to be protected, closing the said mechanical device, and repeating the operation for a second module, fitting the first two modules, obtaining a first connection between modules, securing the tension band of the said first connection, and repeating the said steps until obtaining the ducting of the specified length for the said pipe, cable or line to be protected.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGURE 1A attached is an axial cross-section of a module of the protective ducting according to the invention. FIGURE 1B attached is a view of the axial cross-section fitting and the securing element of the metal tension band.

FIGURE 1C attached is a detailed view of the "tip-and-bag" type fitting and of the locking slot.

FIGURE 1 D attached is a view of a two-module setup forming part of the protective ducting on a pipe, cable or line to be protected.

FIGURE 1 E attached is a three-dimensional view of a module of the protective ducting.

DETAILED DESCRIPTION OF THE INVENTION

The protective ducting for elongated members submitted to abrasion stresses in subsea or land environments according to the invention is made up of: a) one or more modules, each of such modules being of generally cylindrical shape, thereby to form an enclosed inner channel for housing the said pipe, cable or line to be protected, said body being provided with one single longitudinal split, a tip-shaped end and a bag-shaped end, said body being further provided with an internal cavity for housing one single metal tension band per module, said cavity having two open ends so that the said tension band can pass and be secured, enabling structural stability to said body, at least a portion of said metal tension band being so contained and protected in the interior of said body; and b) an element for locking said metal tension band and imparting stability to said modules on the pipe, cable or line to be protected. Particularly preferred materials useful for building said protective ducting body is an engineering plastic such as polyurethane or another material of similar strength.

The protective ducting can be assembled on the pipe, cable or line to be protected either at the surface such as on a ship or on land or even in a subsea location with the aid of a ROV (Remote Operated Vehicle).

The invention will now be described by reference to the attached Figures. It should be clear to the experts that such Figures are a mere illustration of the invention and that various modifications and variations can be made without departing from the spirit of same. Figure 1A is an axial cross-section of a module of the protective ducting according to the invention. As can be seen from Figure 1A, the module designed to make up the protective ducting, generally designed by numeral 100, has a body 1 of generally elongated shape in order to comply with the geometry of a pipe, cable or subsea line. The ends of body 1 of module 100 are provided with an elevation or bulge 3. This enables the embedding of a metal tension band so as to protect said band from degradation and at the same time reinforces the cross section ends of module 100, where the thrust and bending demands are larger.

The geometry of module 100 is such as to define an inner channel 4 designed for inserting the pipe, cable or line (non-represented) to be protected. In order to connect several modules 100 to form a protective ducting for a subsea pipe, cable or line of any length, one end of a first module 100 is provided with a bag-type notch 11, a positive locking slot 12, a contact face 13 between two modules 100 and a front face 14. The other end of the said first module 100 is provided with a tip-type notch 21 for connection with the corresponding bag-type notch 11 of a second module 100, a negative slot 22 for locking with a corresponding positive slot 12 and a contact face 23 between said first and second modules 100.

Body 1 of each module 100 is provided with an internal cavity 31 which extends crosswise to house a tension band 32, said cavity 31 having two open ends so as to enable tension band 32 to pass through the said cavity 31 of an adjacent module 100 in order to secure a first module 100 to a second module 100, at least one portion of the said tension band 32 being in this way contained and protected within said cavity 31.

Figure 1 B is a view of the fitting of longitudinal split 41 and element 33 for securing said tension band 32.

Element 33 for securing tension band 32 serves to bind and keep together both ends of said tension band, impart dimensional stability to the fitted modules and improve the setup strength to thrust and bending.

Metal tension band 32 aims at promoting the perfect closure of the modules 100 set forming the protective ducting. This avoids that debris would enter the protective ducting, and when band 32 is locked with the aid of element 33, the mechanical strength of the set is improved. Element 33 acts as a locking device for the two ends of tension band 32. After one module 100 is mounted on a pipe, cable or line and a second module 100 is fit to said first module, the operator passes the ends of metal tension band 32 inside element 33 and with the aid of a mechanical device, the locking of the two ends around element 33 is performed, promoting the attachment of modules 100 on the said pipe, cable or line 2 to be protected. Split 41 has the shape of a longitudinal Z and makes the only longitudinal split of module 100. Contrary to state-of-the-art devices designed for the same purposes of protecting subsea or land pipes, cables or lines, advantageously module 100 of the present invention dispenses with the geometry of two longitudinal halves that are secured, such state-of-the-art devices made in halves conducting to several drawbacks for the assembly and maintenance of the modules intended for making the protective ducting. On the other hand, the geometry of the protective ducting of the present invention, having one single longitudinal split 41 in module 100, has the following advantages: easiness to handle module 100 during transportation and preparation for installation, lower installation time consequent to absence of need to fit two halves and consequent fine tuning, less possibility of debris or foreign materials to enter the protective ducting which upon contact with the said pipe, cable or line can lead to secondary wear, increased stiffness of the module 100 set when submitted to bending stresses, and reduced load on securing or tension bands 32 because of the memory of the elastomeric material. Figure 1C is a detail of the tip-and-bag type fitting and of the locking slot. This Figure shows end 11 provided with a bag-type notch for connection with tip-type notch 21 of a contiguous module 100 (non-represented), the positive edge of locking slot 12 for connection with the negative edge of locking slot 22 (non- represented), besides the cavity 31 for installing the metal tension band 32 as well as tension band 32 itself.

Figure 1 D is a view of the assembly of a set of two modules 100 of the invention on a pipe, cable or line to be protected, where 2 stands for the said pipe, cable or line to be protected, and 100 is each protective module. In spite of the fact that for the sake of clarity of the drawing only two modules 100 have been represented, it should be obvious for the experts that a plurality of such modules 100 of the invention can be coupled with the aid of the method described above in order to obtain a protective ducting for protecting a length of a pipe, a cable or line of several meters or kilometers.

Figure 1E is a three-dimensional view of the protective ducting 100 seen from the notched tip-type end 21.

The installation of successive modules 100 to obtain the protective ducting of the invention is carried out with the aid of a method which comprises the steps of: a) on the pipe, cable or line 2 to be protected, assembling a stopper, as required for similar protective ducting; b) with the aid of a mechanical device, opening a first module 100; c) positioning said first module 100 so that the notched tip-type end 21 is turned towards the direction of the launching of pipe, cable or line 2; d) Fitting said module 100 on the pipe, cable or line 2 to be protected; e) Closing said mechanical device, accommodating said first module 100 on pipe, cable or line 2 and withdrawing the said mechanical device; f) with the aid of the said mechanical device, opening a second module 100 and fitting a second module 100 on said pipe, cable or line 2, so that the notched tip- type end 21 is turned towards the direction of the launching of said pipe, cable or line 2; g) pushing the said second module 100 into the housing of the first module 100 until both parts fit together, forming outwards a single surface; h) securing metal tension band 32 of the first connection made by passing the ends of said band 32 inside element 33 with the aid of the said mechanical device for this purpose and performing the locking of the two ends of said band 32 around element 33 thereby enabling the securing of modules 100 on the pipe, cable or line 2 to be protected; i) preparing the next modulus 100 to be installed as described in step T), and repeating the described operation until the specified length of the pipe, cable or line 2 is protected by said protective ducting.

The geometry of the inventive modulus 100 aiming at obtaining a protective ducting for pipes, cables or lines 2 submitted to contact with abrasive materials causing wear and eventually tearing of the protected member enables to deal with shorter segments than the segments of equivalent, state-of-the-art protective ducting. As a consequence, these shorter segments favor the accommodation of said protective ducting in shorter radius of curvature, this making easier the installation, handling and launching of said ducting than the installation of similar state-of-the-art ducting. Still, the geometry that has been proposed for such module 100 based on one single longitudinal split 41 reduces the assembly time and makes easier the alignment in the installation.

For the particular case of offshore applications, one of the critical phases is the launching of the protected pipe, cable or line, when it passes on a wheel and it is submitted to bending demands well higher than those encountered during its subsea operation. Advantageously, not only the shorter length of the present modules relative to state-of-the-art devices makes easier its accommodation on the launching wheel, but also the tip-and-bag fitting and especially locking slots 12, 22 aid in promoting improved strength to thrust and bending of the set of modules 100, while at the same time the connection achieved between said modules avoid the entrance of foreign materials even when such set of modules is bent.

Claims

I CLAIM:
1. A protective ducting for pipes, cables or lines wherein said ducting comprises at least one module 100, each of said modules 100 comprising: a) a generally cylindrical body 1 involving the pipe, cable or line 2 to be protected thereby to form an enclosed cylindrical inner channel 4 for housing the said pipe, cable or line 2, said body 1 being provided with one single longitudinal split 41 , a tip-shaped end and a bag-shaped end, said body 1 being further provided with an internal cavity 31 for housing one single metal tension band 32 per module 100, said cavity 31 having two open ends so that the said tension band 32 can pass through the said cavity 31 of an adjacent module 100 in order to secure a first module 100 to a second module 100, at least a portion of said tension band 32 being so contained and protected in the interior of said body 1 ; and b) an element 33 for locking said metal tension band 32 and impart stability to said modules 100 on the pipe, cable or line 2 to be protected.
2. A protective ducting according to claim 1 , wherein it is made up of two or more modules 100, as required for making the protective ducting of said pipe, cable or line 2.
3. A protective ducting according to claim 1 , wherein 2 is a pipe, cable or line or any like elongated member.
4. A protective ducting according to claim 1 , wherein said pipe, cable or line 2 is positioned subsea or on land.
5. A protective ducting according to claim 1 , wherein body 1 is made up of an engineering plastic.
6. A protective ducting according to claim 5, wherein the engineering plastic is polyurethane.
7. A protective ducting according to claim 1 , wherein the ends of body 1 module 100 are provided with a bulge 3 for housing metal tension band 32 so as to protect same from degradation while at the same time reinforces the cross section of module 100.
8. A protective ducting according to claim 1, wherein in order to perform the connection of several modules 100 and form said ducting for protecting a pipe, cable or line 2 of any length, one end of a first module 100 is provided of a bag- type notch 11 , a positive locking slot 12, a contact face 13 between said first module 100 and a second module 100 and a front face 14, while the other end of the said first module 100 is provided of a tip-type notch 21 for connecting with the corresponding said bag-type notch 11 of the said second module 100, a negative slot 22 for locking with the corresponding positive slot 12, and a contact face 23 between said first and second modules 100.
9. A protective ducting according to claim 1 , wherein in a module 100, the said metal tension band 32 trespasses said inner cavity 31 of an wherein the installation of modules 100 to form the protective ducting for pipes, cables or lines 2 is carried out at adjacent module 100 in order to secure a first module 100 to a second module 100, so that at least a portion of said metal tension band 32 is contained and protected within said cavities 31.
10. A protective ducting according to claim 1 , wherein additionally said metal tension band 32 is intended for i) promoting the perfect closure of the set of modules 100 forming said protective ducting so as to prevent the entrance of debris in the interior of said ducting and ii) when said tension band 32 is locked by means of said element 33, promoting the increase of the mechanical strength of the set of modules 100.
11. A protective ducting according to claim 1 , wherein said element 33 for locking the said metal tension band 32 binds and keeps cohesive the two ends of the said metal tension band 32, imparts dimensional stability to fitted modules 100 as well as improves strength of the set of modules 100 towards thrust and bending.
12. A protective ducting according to claim 1 , wherein the split 41 has the shape of a longitudinal Z and constitutes the only longitudinal split of a module 100.
13. A method for the installation of the protective ducting for pipes, cables or lines according to claim 1, wherein said method comprises the following steps: j) on the pipe, cable or line 2 to be protected, assembling a stopper; k) with the aid of a mechanical device, opening a first module 100; I) positioning said first module 100 so that the notched tip-type end 21 is turned towards the direction of the launching of pipe, cable or line 2; m) Fitting said module 100 on the pipe, cable or line 2 to be protected; n) Closing said mechanical device, accommodating said first module 100 on pipe, cable or line 2 and withdrawing the said mechanical device; o) with the aid of the said mechanical device, opening a second module 100 and fitting a second module 100 on said pipe, cable or line 2, so that the notched tip-type end 21 is turned towards the direction of the launching of said pipe, cable or line 2; p) pushing the said second module 100 into the housing of the first module 100 until both parts fit together, forming outwards a single surface; q) securing metal tension band 32 of the first connection made by passing the ends of said band 32 inside element 33 with the aid of the said mechanical device for this purpose and performing the locking of the two ends of said band 32 around element 33 thereby enabling the securing of said modules 100 on the pipe, cable or line 2 to be protected; r) preparing the next modulus 100 to be installed as described in step f), and repeating the described operation until the specified length of the pipe, cable or line 2 is protected by said protective ducting.
14. A method according to claim 13, wherein the installation of modules 100 to form the protective ducting for pipes, cables or lines 2 is carried out at the surface.
15. A method according to claim 13, wherein the installation of modules 100 to form the protective ducting for pipes, cables or lines 2 is carried out at a subsea location.
PCT/BR2007/000121 2006-05-24 2007-05-23 Protective ducting and method for the installation of same WO2007134416A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0602083B1 BRPI0602083B1 (en) 2006-05-24 2006-05-24 Device protection ducts and the same installation method
BRPI0602083-6 2006-05-24

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WO2007134416A2 true true WO2007134416A2 (en) 2007-11-29
WO2007134416A3 true WO2007134416A3 (en) 2008-01-31

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628572A (en) * 1969-12-29 1971-12-21 Owens Corning Fiberglass Corp Pipe insulation and method of installing same
US5490742A (en) * 1993-06-04 1996-02-13 Cronk; Tommy J. Modular protective pipeline cover
WO2003098085A1 (en) * 2002-05-15 2003-11-27 Crp Group Limited Protective ducting

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628572A (en) * 1969-12-29 1971-12-21 Owens Corning Fiberglass Corp Pipe insulation and method of installing same
US5490742A (en) * 1993-06-04 1996-02-13 Cronk; Tommy J. Modular protective pipeline cover
WO2003098085A1 (en) * 2002-05-15 2003-11-27 Crp Group Limited Protective ducting

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