WO1998010210A1 - Device and method for filling a bag with a fluid material and bag suited for this purpose - Google Patents
Device and method for filling a bag with a fluid material and bag suited for this purpose Download PDFInfo
- Publication number
- WO1998010210A1 WO1998010210A1 PCT/FR1997/001570 FR9701570W WO9810210A1 WO 1998010210 A1 WO1998010210 A1 WO 1998010210A1 FR 9701570 W FR9701570 W FR 9701570W WO 9810210 A1 WO9810210 A1 WO 9810210A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bag
- longitudinal edges
- straps
- shuttle
- injection member
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/123—Devices for the protection of pipes under water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
Definitions
- the present invention relates to a device for covering an elongated member, such as a cable or a pipe deposited on the seabed.
- US Pat. No. 4,480,943 is a device for covering a pipe deposited on the seabed, arranged to deploy on the pipe an elongated bag having in cross section a flattened shape, which is filled with 'A hardenable material such as cement from an accompanying ship, the filling of the bag being carried out by an injection member as it is deployed.
- the bag substantially follows the profile of the covered member before the material injected inside hardens. Protection is thus obtained, in a form adapted to that of the covered member, against mechanical attacks linked for example to navigation or fishing.
- the bag can also be used to hold the covered organ in place against the action of underwater currents.
- the bag has two longitudinal edges which can be separated on the one hand to form an opening on the top of the bag, allowing the introduction of the injection member, and on the other hand to be assembled downstream. of the last.
- the invention aims to easily and reliably perform continuous filling of the bag.
- the invention achieves this by proposing a device for the continuous filling with a hardenable material of a bag of elongated shape and having in cross section a flattened shape, this bag also having on its upper face two separable and overlapping longitudinal edges.
- ie device comprising an injection member making it possible to inject a hardenable material into the bag and a shuttle intended to be moved along the bag, this shuttle being shaped at the front to continuously spread said longitudinal edges one on the other at least in a direction perpendicular to the plane of the bag and define a lateral opening extending over a given length to allow the introduction of the injection member into the bag, the shuttle being further conformed to the 'rear to continuously bring said longitudinal edges to make them overlap and perform their assembly.
- the bag has at the lateral end of said longitudinal edges of the guide ribs and the shuttle comprises an external guide and an internal guide having grooves shaped to guide said ribs, the external guide extending upstream of the internal guide, the two guides extending in respective parallel planes whose spacing corresponds substantially to the distance between said ribs when the longitudinal edges of the bag are assembled so as to close the bag, said shuttle further comprising at the before a spacer member extending laterally between said planes and placed upstream of the internal guide to spread the longitudinal edges of the bag when the latter passes through the shuttle, the shuttle comprising at the rear a pressure member, located downstream of the guide external, to reassemble said longitudinal edges.
- Such a filling device also makes it possible to avoid, if the longitudinal edges of the unfilled bag have been assembled with a certain lateral offset, that the removable fixing means, which are preferably of the Velcro strip type as indicated above, are not subjected during their passage in the shuttle to shearing forces liable to deteriorate them.
- the subject of the invention is also a new method of covering an elongated member, such as a cable or a pipe deposited on the seabed, of the type in which a bag is deployed on the member to be covered.
- the injection of the hardenable material can be carried out without contact with water and one can add to the hardenable material a load of reinforcing metallic elements, without fear of a problem of corrosion of these metallic elements by water. .
- the presence of the metallic elements notably increases the mechanical resistance when the hardenable material has frozen and it becomes possible thanks to the invention, for equivalent mechanical resistance, to use a quantity of hardenable material clearly lower than in the art. prior.
- the saving in hardenable material which it is possible to achieve thanks to the invention makes it possible to reduce, or even avoid, the supplies of hardenable material from the accompanying ship, which is particularly advantageous when covering the cable or the pipe. takes place on the high seas.
- said metallic elements have a shape elongated and their length is between 2 and 3 cm and their
- the injection member when a bag section is filled, the injection member is moved relative to the bag to remove it from the hardenable material contained in the bag and then closed the bag along a transverse closure line, then optionally separating the unfilled bag reserve from the filled and closed section of bag.
- the bag is closed by stapling after the injection member has been brought into a position in which it does not hinder the closing of the bag.
- the bag has two opposite main walls, connected by straps whose length in the stretched state determines the thickness of the bag after filling.
- each main wall of the bag is made up of a woven fabric and said straps are made up of threads woven from this fabric using a weaving technique of the two-piece velor type facing each other.
- the injection member is used to move the straps away from said longitudinal edges.
- the injection member is in this case advantageously shaped so as to constitute, when it enters the bag, a deflector capable of moving the straps away from said longitudinal edges.
- the injection member is also advantageously shaped to at least partially deploy the straps located in the vicinity of the zone into which the hardenable material is injected.
- the subject of the invention is also a bag of elongated shape capable of being used as an envelope for pouring inside the bag of a fluid material in order to produce a protective member of elongated shape, said bag having in section transverse a generally flattened shape, comprising opposite main walls, constituted by woven fabrics and connected by straps coming from weaving by a weaving technique of the velvet type double piece face-to-face with said main walls, the length to the stretched state of beta straps determining the thickness of the bag in the filled state.
- the subject of the invention is also a protective member of elongated shape, consisting of a bag as mentioned above filled with a hardenable material, preferably cement, and advantageously comprising a reinforcing filler made up of metallic elements.
- FIG. 1 is a schematic perspective view illustrating the use of a device according to the invention
- Figure 2 is a schematic sectional view of an elongated member covered by a protective bag according to the invention
- Figure 3 is a schematic sectional view of a device according to an exemplary embodiment of the 'invention
- FIG. 4 is a diagrammatic side view of the injection member and of the shuttle
- FIG. 5 is a diagrammatic view from above according to the arrow V in FIG. 4,
- FIG. 6 is a schematic side view representing the shuttle
- FIG. 7 is a schematic front view according to arrow VII of FIG. 6, FIGS. 8 to 10 show different cross sections of the bag during filling,
- Figure 11 is a schematic view similar to Figure 3 showing the device at the end of filling a bag section and before the closure of the latter and its cutting.
- FIG. 1 There is shown schematically in Figure 1 and in perspective a cable 1 for transporting electrical energy laid on the seabed and being covered by a bag 2, deployed and continuously filled by a tracked vehicle 3, connected to an accompanying ship 4 by a pipe 5 for supplying a hardenable material to be injected into the bag, by a control cable 6, and by a lifting cable 7.
- vehicle 3 it is not going beyond the scope of the invention to use the vehicle 3 to cover any other elongated member such as a pipe for transporting hydrocarbons for example or to fill an elongated bag.
- the bag is deployed on the member to be covered by the tracked vehicle 3.
- the means for accommodating a reserve of unfilled bag are replaced by means for guiding the unfilled bag and bringing it into a position suitable for its filling.
- the curable material is a cement grout whose density is between 1.6 and
- curable is of the order of 20 to 80 kg per m of curable material.
- density values less than 1.6 the metallic elements tend to settle in the bag and for values greater than 2.4, grout injection becomes difficult.
- the vehicle 3 is self-propelled and it is provided in a manner known per se with detectors not shown which allow it to follow the member to be covered without the intervention of divers.
- the curable material is injected under pressure in the still fluid state into the bag so that the latter can conform to the profile of the member to be covered, as illustrated in the cross section of FIG. 2.
- the bag 2 is of elongated shape, has a generally flattened cross-section and has two main walls 8 and 9 meeting at the lateral ends 10 of the bag and connected from place to place by straps 11 whose length in the stretched state determines the thickness of material protecting the covered organ.
- elongated bag is meant a bag whose length is at least ten times greater than the width.
- the width of the bag is for example of the order of 2 m and its thickness between 10 and 50 cm, and preferably between 15 and 30 cm.
- the length of a bag section can reach for example 500 m, or even several kilometers.
- the bag constitutes, when the material which fills it has hardened, a protective barrier against external mechanical attack, but also against corrosion and can also reduce the heat loss in the case where the covered organ is a pipe for transporting hot hydrocarbons.
- the top wall 9 has in its central region two longitudinal edges 12 and 13 overlapping and which can be assembled removably by means of fastening means 14 and 15 hooking by contact, of the Velcro strip type.
- the longitudinal edges 12 and 13 are provided on their free edges with respective guide ribs 16 and 17, of substantially circular cross section in the example described.
- the straps 11 came from weaving with the main walls 8 and 9 by a technique called velvet double piece face-to-face, known in itself and mistletoe will not be described in more detail.
- the implantation of the straps 11 is chosen so as to give the filled bag a predetermined thickness which is substantially constant, depending on the length of the said straps, without however the presence of the straps inside the bag preventing the good distribution of the metallic reinforcing elements. added to the cement grout.
- the straps 11 are distributed in a staggered fashion with a pitch of 6 cm in the longitudinal direction of the bag and a spacing of 3 cm between two rows of straps. There are no straps 11 between the longitudinal edges 12 and 13 and to compensate for this absence, from the point of view of the mechanical resistance of the bag to the pressure of the cement grout, the straps adjacent to the longitudinal edges 12 and 13 are doubled.
- the bag 2 is stored on the vehicle 3 while being wound up on a reel 18 situated at the front of the vehicle with the longitudinal edges 12, 13 assembled.
- the bag reserve stored on the reel 18 is continuously unwound in a coordinated fashion with the advancement of the vehicle 3 and passes over a guide table 19, inclined downwards and towards the rear of the vehicle until a short distance from the seabed, so that each portion of the filled bag is gently deposited on the organ to be covered and on the seabed.
- the vehicle 3 also includes a cutting stapler 20 for closing transversely and detaching a section of filled bag.
- the injection of the hardenable material into the bag is carried out by means of an injection pipe 21, integral at the top with a support 22 capable of being moved on a guide structure 23, the latter being integral with the guide table 19 and disposed above and parallel to it.
- the injection pipe 21 is connected at its upper end to a hose 24 itself connected to a nozzle 25 connected to the pipe 5.
- a shuttle 26 is provided on the one hand to separate the longitudinal edges 12 and 13 in order to create an opening allowing the introduction of the injection pipe 21 into the bag and on the other hand then to assemble the longitudinal edges, as will be specified in the following.
- the shuttle 26 is integral with the aforementioned support 22, and as shown more particularly in FIGS. 4 to 7, comprises an external guide 27 and an internal guide 28 having grooves shaped to guide the ribs 16 and 17 respectively.
- the external guide 27 is extended, having regard to the direction of travel of the bag on the guide table 19, upstream of the internal guide 28.
- the internal guides 28 and external 27 follow each of the inflected paths in respective vertical planes, the spacing corresponding substantially to the spacing of the guide ribs 16 and 17 when the longitudinal edges of the bag are assembled so as to close the bag.
- the shuttle 26 further comprises a spacer member 29 located upstream of the internal guide 28 and having a front end 30 which is inserted between the longitudinal edges 12 and 13 to separate them by wedge effect, and a pressure member 31 located downstream of the external guide 27 and opposite a sole 32, to reassemble the longitudinal edges 12 and 13 before they leave the shuttle 26.
- the injection pipe 21 has a portion 33, extending between the external guides 27 and internal guides 28, oriented along an axis I contained in a plane substantially parallel to the plane of the guide table 19 and forming an angle of approximately 45 °. with the direction of travel of the bag.
- the axis I is thus substantially parallel to the plane of the bag which runs on the guide table 19.
- the portion 33 is connected to a rectilinear portion whose axis J extends parallel to the direction of movement of the bag on the guide table and parallel to the latter.
- the portion 34 is connected, by an inflected portion 35, to a rectilinear portion of great length, of axis K parallel to the above-mentioned axis J and situated substantially in the median plane of the bag when the latter scrolls on the guide table 19
- the length of the combined portions 35 and 36 measured parallel to the running direction of the tray, reaches lm80.
- FIGS. 8 to 10 show different cross sections of the bag, respectively at the cut lines VIII, IX and X of Figure 3.
- the bag 2 comes into contact with the shuttle 26 with the walls 8 and 9 substantially one against the other and the longitudinal edges 12 and 13 assembled as shown in FIG. 8.
- the fixing means 14 and 15 are protected from the exterior thanks to the fact that they are assembled. This prevents the velcro strips from losing their effectiveness in the event of soiling.
- the portion of the rib 17 which engages inside the external guide 27 is deflected towards the outside while the spacer member 29 separates, by a traction directed in a vertical plane, the longitudinal edges 12 and 13 upstream of the internal guide 28.
- a lateral opening is thus formed in the bag, through which the injection pipe 21 penetrates, from the side, inside the bag, as shown in FIG. 9.
- the axis I is substantially parallel in the plane of the longitudinal edges arranged face-to-face on either side of the portion 33 of the injection pipe.
- the portion 33 of the injection pipe 21 advantageously constitutes a deflector which moves the straps 11 away from the opening formed between the longitudinal edges 12 and 13. This prevents, during the reassembly of the longitudinal edges 12 and 13, the straps 11 are not sandwiched between the longitudinal edges 12 and 13 and subsequently impede the expansion of the bag during filling with the hardenable material.
- the internal guide 28 and the sole 32 deflect the longitudinal edge 13 towards the outside, downstream of the portion 33 of the injection pipe, and bring it closer to the longitudinal edge 12 for assembling the two longitudinal edges by pressing between the pressure member 31 and sole 32.
- the unwinding speed of the bag is chosen as a function of the flow rate of curable material injected and of the size of the bag so as to keep the injection member immersed in the curable material during filling.
- FIG. 11 shows the vehicle 3 at the end of the operation of filling a section of bag 2, which must be closed transversely and detached from the undeployed bag reserve, wound on the reel 18.
- the support 22 is moved upwards from the lower position it kept during the filling process, so as to drive the injection pipe 21 out of the hardenable material contained in the bag and above the stapler cutter 20
- the injection pipe 21 does not interfere with the stapling of the bag over its entire width as well as its cutting.
- the device according to the invention is particularly suitable for filling a bag with a curable material comprising a load of metallic reinforcing elements, it is possible, without departing from the scope of the invention, to use various filling materials, to which are added or not loads of reinforcing elements, metallic or not.
- the shuttle 26 of the embodiment which has just been described is particularly suitable for separating and then reassembling the longitudinal edges of the bag when these are provided with fastening means of the velcro strip type, does not depart from the scope of the invention by assembling the longitudinal edges using other fixing means, for example by sewing, welding, or stapling, the method of opening and assembling the bag by spacing then reconciliation longitudinal edges in a direction lying in a plane generally perpendicular to the bag plane allowing precise and reliable positioning of the longitudinal edges as well as a possibility of introducing the injection member from the side into the bag and not from above , so to easily use the injection member as a deflector to spread the straps, as explained above.
- the undeployed bag reserve can be stored on the vehicle 3, not wound on a reel as described above, but folded in accordion.
- the bag in the filled state can have a constant thickness depending on its length or variable, the thickness variation being easily obtained by varying the length of the straps.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
- Lining And Supports For Tunnels (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002264891A CA2264891A1 (en) | 1996-09-06 | 1997-09-05 | Device and method for filling a bag with a fluid material and bag suited for this purpose |
EP97940186A EP0923692A1 (en) | 1996-09-06 | 1997-09-05 | Device and method for filling a bag with a fluid material and bag suited for this purpose |
AU42114/97A AU4211497A (en) | 1996-09-06 | 1997-09-05 | Device and method for filling a bag with a fluid material and bag suited for this purpose |
NO991020A NO991020L (en) | 1996-09-06 | 1999-03-02 | Apparatus and method for filling a sack with a fluid material and sack suitable for this purpose |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9610909A FR2753255B1 (en) | 1996-09-06 | 1996-09-06 | DEVICE AND METHOD FOR FILLING A BAG WITH A FLUID MATERIAL AND BAG SUITABLE FOR THIS PURPOSE |
FR96/10909 | 1996-09-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998010210A1 true WO1998010210A1 (en) | 1998-03-12 |
Family
ID=9495526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/001570 WO1998010210A1 (en) | 1996-09-06 | 1997-09-05 | Device and method for filling a bag with a fluid material and bag suited for this purpose |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0923692A1 (en) |
AU (1) | AU4211497A (en) |
CA (1) | CA2264891A1 (en) |
FR (1) | FR2753255B1 (en) |
NO (1) | NO991020L (en) |
WO (1) | WO1998010210A1 (en) |
ZA (1) | ZA977790B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2486014A (en) * | 2010-12-02 | 2012-06-06 | Underwater Cutting Solutions Ltd | A method and apparatus for removing a subsea concrete protection mattress from the sea floor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793845A (en) * | 1972-07-20 | 1974-02-26 | Marcona Corp | Apparatus and method for anchoring submerged conduit |
DE3144092A1 (en) * | 1981-11-06 | 1983-05-26 | Bernhard Prof. Dr.-Ing. 4630 Bochum Maidl | Method for the protection or scour protection of natural soils, artificial fillings and systems as well as underwater structures on the basis of Colcrete mats or filled fabric mats |
US4480943A (en) * | 1982-04-08 | 1984-11-06 | Losinger Ag | Method and apparatus for laying underwater coverings |
-
1996
- 1996-09-06 FR FR9610909A patent/FR2753255B1/en not_active Expired - Fee Related
-
1997
- 1997-08-29 ZA ZA9707790A patent/ZA977790B/en unknown
- 1997-09-05 EP EP97940186A patent/EP0923692A1/en not_active Withdrawn
- 1997-09-05 WO PCT/FR1997/001570 patent/WO1998010210A1/en not_active Application Discontinuation
- 1997-09-05 CA CA002264891A patent/CA2264891A1/en not_active Abandoned
- 1997-09-05 AU AU42114/97A patent/AU4211497A/en not_active Abandoned
-
1999
- 1999-03-02 NO NO991020A patent/NO991020L/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793845A (en) * | 1972-07-20 | 1974-02-26 | Marcona Corp | Apparatus and method for anchoring submerged conduit |
DE3144092A1 (en) * | 1981-11-06 | 1983-05-26 | Bernhard Prof. Dr.-Ing. 4630 Bochum Maidl | Method for the protection or scour protection of natural soils, artificial fillings and systems as well as underwater structures on the basis of Colcrete mats or filled fabric mats |
US4480943A (en) * | 1982-04-08 | 1984-11-06 | Losinger Ag | Method and apparatus for laying underwater coverings |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2486014A (en) * | 2010-12-02 | 2012-06-06 | Underwater Cutting Solutions Ltd | A method and apparatus for removing a subsea concrete protection mattress from the sea floor |
GB2486014B (en) * | 2010-12-02 | 2014-04-09 | Underwater Cutting Solutions Ltd | A method and apparatus for removing a subsea concrete protection mattress from the sea floor |
Also Published As
Publication number | Publication date |
---|---|
NO991020D0 (en) | 1999-03-02 |
FR2753255B1 (en) | 1998-10-09 |
CA2264891A1 (en) | 1998-03-12 |
NO991020L (en) | 1999-04-30 |
AU4211497A (en) | 1998-03-26 |
FR2753255A1 (en) | 1998-03-13 |
EP0923692A1 (en) | 1999-06-23 |
ZA977790B (en) | 1998-02-23 |
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