WO2018000542A1

WO2018000542A1 - Unmanned shipborne pipeline maintenance unit

Info

Publication number: WO2018000542A1
Application number: PCT/CN2016/095108
Authority: WO
Inventors: 杨越
Original assignee: 杨越
Priority date: 2016-06-26
Filing date: 2016-08-14
Publication date: 2018-01-04
Also published as: CN105864563A

Abstract

An unmanned shipborne pipeline maintenance unit, comprising: a plastic or metal guide pipe (12) axially split into two axial edges (11, 13); the guide pipe (12) is initially formed by flat-plate material, the flat-plate material is then cut into an appropriate size, and then a longitudinal edge of the flat-plate material is inclined to form an inclined plane along the circumferential range of a pipeline or is gradually thinned; one thinned part (15) is formed by removing the material forming an outer surface of the guide pipe (12) from the surface, and the other gradually-thinned part (17) is formed by removing material from an inner surface of the pipeline (12); the gradually-thinned parts are arranged in parallel; the thicknesses of the gradually-thinned parts arranged in parallel are configured to correspond to the thickness of a material plate used for forming the guide pipe (12); a flat plate used for forming the guide pipe (12) is heated in a furnace to the softening point thereof so as to form the guide pipe around a mandrel, and thus the diameter of the guide pipe is close to that of a pipeline to be maintained; the guide pipe (12) is fully opened during the mounting process of a maintenance unit (10) so as to seal part of the pipeline.

Description

Unmanned ship line maintenance unit

Technical field

The invention relates to a maintenance tool, in particular to a pipeline maintenance unit carried by an unmanned ship in the maintenance of a submarine oil and gas pipeline.

Background technique

The repair unit repair is to install the fastener-repair unit outside the pipeline at the leak site to achieve the purpose of repairing the pipeline leak. The repair unit repair technology is now mature and applied in the maintenance of land and submarine oil and gas pipelines, according to the repair unit repair technology. The application of submarine oil and gas pipelines, the most critical component of the current maintenance technology is the subsea pipeline repair unit. Most of the repairing units are made in two halves and are fixed to the pipe by bolting or welding, so they can be divided into welded and bolted. The welded repair unit can improve the repair reliability and the bolted connection is more convenient.

For the maintenance of submarine pipelines in China's vast seas, the current method is to install and repair underwater submersibles in Repulse Bay. For deep water areas, the submarine pipelines are referred to the working vessels, and the pipeline damages are pretreated directly on the working vessels. Repair the pipeline for the repair unit. However, in the case of extremely low visibility of water turbidity, the above two methods have obvious drawbacks. Due to the need to arrange support ships, personnel, maintenance equipment and other auxiliary equipment to the maintenance site, and after the operation is completed, support ships, personnel, maintenance equipment and The recovery of other auxiliary equipment is therefore costly and economical.

The repair unit equipment of domestic manufacturers is mainly applied to land oil and gas pipelines. It can be used to temporarily block oil and gas pipelines for 2-3 months during temporary maintenance, ensuring that oil and gas does not leak in the seals around the repair unit. When used for permanent maintenance, it can be used. The repair unit is integrally welded to the pipe. Domestic manufacturers have not yet produced equipment for repairing subsea oil and gas pipelines. The domestic equipment technology of overseas submarine oil and gas pipelines is relatively mature. With the rapid development of unmanned ship technology, some repair units with special structures have been developed and loaded onto unmanned ships. The repair of the submarine pipeline can be completed without the need for staffing, using unmanned vessels and repair and repair units and appropriate auxiliary equipment, without the need to lift the pipeline to the unmanned ship for pre-treatment, saving time and economic costs.

Summary of the invention

The object of the present invention is to provide an unmanned ship-line maintenance unit comprising: a plastic or metal material conduit which is split axially into two axial sides, and the conduit is initially formed as a flat material and then cut into appropriate dimensions. Then, the longitudinal edge is inclined or tapered along the circumferential extent of the pipe, the tapered portion is formed by removing the material constituting the outer surface of the pipe from the surface, and the tapered portion of the other portion is removed from the inner surface of the pipe. The material is formed, the tapered portion is discharged side by side, and the thickness of the tapered portion which is discharged in parallel after being configured corresponds to the thickness of the material plate used for forming the conduit, and the flat plate used for heating the conduit in the furnace reaches its softening point and Formed around the mandrel to approximate the diameter of the pipe to be repaired, the conduit being sufficiently open during installation of the repair unit to seal a portion of the pipe; at least one rupturable bag containing the adhesive material placed on the inner surface of the conduit , the position is adjacent to the tapered portion but not on it, and the adhesive material can adhere to the two Is tapered portions together; protrusions mounted on the inner surface of the catheter, to prevent the outer surface of the pipe by rupture of the duct and a packet backlog opening process, before the juxtaposed position until a tapering portion just reached.

Preferably, the material of the conduit is PVC or a metallic material.

Preferably, the conduit is formed using a backlog, and the forming step is typically used to deflect the conduit toward an open state.

Preferably, the plurality of packages are carried by strips of plastic material, which are arranged in parallel with the longitudinal edges when the bag is secured to the pipe by an adhesive.

Preferably, the protrusion is a single longitudinal edge, integrally formed with the catheter or attached to the catheter or longitudinally forming a linear indentation, and disposed on the side of the package opposite to the tapered portion, with the package phase Neighboring position.

Preferably, the outer film sleeve of polyethylene and the inner film sleeve are further disposed around the pipe, the diameter of the outer film sleeve is much smaller than the diameter of the pipe, and the inner film sleeve is placed inside the rolled pipe and both ends The respective ends of the outer film sleeve are heat sealed to provide a moisture tight seal to the conduit and bag.

Preferably, the gasket sleeve surrounds the outer film sleeve in a circumferential direction, and the gasket sleeve is made of a gel-like material, a viscous material, deformable and stretchable without breaking.

Preferably, the gasket sleeve is made of a modified polymeric asphalt.

Preferably, a tissue material having one or more layers is formed as a tuft sleeve and is defined in a relatively tensioned condition around the gasket sleeve, the curtain material being of the usual type used as a packaging material.

Preferably, there is also a mandrel assembly in which the unit is placed for transporting the repair unit to a defective pipe section, the mandrel assembly is mounted on the skid, and has a drag device with a motor for dragging the heart The shaft assembly thereby drags the probing television camera through the sewer line.

Preferably, there is also a camera that is used in conjunction with the mandrel assembly to allow for visual positioning of leak locations or other defects within the pipeline.

The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <

DRAWINGS

Some specific embodiments of the present invention are described in detail below by way of example, and not limitation. The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in consideration of the following description in conjunction with the accompanying drawings.

Figure 1 shows a perspective view of a pipe used in the present invention as a component of a pipeline service component;

Figure 2A is a longitudinal sectional view of the pipe of Figure 1, surrounded by a two-layer film sleeve in the intermediate stage of the production of the pipeline repairing component of the present invention;

Figure 2B is a longitudinal cross-sectional view of the complete line service component of the present invention, wherein the component is in a disassembled, pre-installed state;

Figure 3 is a cross-sectional view of the pipeline service component of Figure 2;

Figure 4 is a cross-sectional detail view of the component repair component portion of Figures 2B and 3 as it expands during component expansion as part of a pipeline repair operation;

Figure 5 is a cross-sectional detail view showing the same portion of the pipeline repairing member shown in Figure 4, but showing the next moment of time during the expansion of the component;

Figure 6 is a cross-sectional detail view of the same portion of the line repair member shown in Figures 4 and 5, but showing the condition after the element is fully expanded;

Figure 7 is a top plan view of the strip of the auxiliary packet used in the pipeline repairing element of the present invention;

Figure 8 shows a cross-sectional view taken along line 8-8 of Figure 7;

Figure 9 is a graphical representation of the location of the pipeline repair component of the present invention for installation in a pipeline;

Figure 10 is a longitudinal sectional view showing the case where the pipeline repairing member of the present invention is installed in a damaged section of the pipeline;

Figure 11 is a blasting diagram illustrating how the plurality of pipeline repair components of the present invention are connected in series for use.

detailed description

Referring particularly to the drawings, a pipeline repair unit 10 constructed in accordance with the present invention includes a conduit 12 of plastic or metallic material, the axial split being referred to as two

axial edges

11, 13. The preferred material for the conduit 12 is PVC, but any metallic or plastic material may be used as long as it meets the functional requirements described herein. Guide The tube 12 is initially formed as a flat sheet material and then cut to a suitable size, after which the

longitudinal edges

11, 13 are sloped or tapered along the circumferential extent of the tube at 15 and 17, respectively. The tapered portion 15 is formed by removing the material constituting the outer surface of the catheter 12 from the surface, and the tapered portion 17 is constructed by removing material from the inner surface of the pipe. When the repair unit 10 is installed in the pipeline (see Fig. 6), the

tapered portions

15 and 17 are discharged side by side, and the thickness of the tapered portion that is arranged to be discharged side by side is configured to correspond to the thickness of the material sheet used to form the material. As a result, the thickness of the pipe is uniform throughout the circumference of the pipe. The conduit 12 is then heated in the furnace to form the plate used to reach its softening point and is formed around the mandrel to approximate the diameter of the pipe to be repaired. An alternative method of forming the catheter 12 (e.g., extrusion method, etc.) can be used if desired. In any case, the forming step is typically used to offset the pipe to an open state in which the

tapered portions

15 and 17 are placed side by side, as shown in FIG.

At least one rupturable bag 19 comprising an adhesive material 21 is placed on the inner surface of the catheter 12, and the pre-tapered portion 15 is adjacent but preferably not located thereon. In a preferred embodiment of the invention, the plurality of packs 19 are in the form shown in Figures 7, 8 wherein the strips 20 of plastic material carry a series of packs 19. When the bags are fixed to the pipe by an adhesive or the like, they are usually arranged in parallel with the longitudinal edges 11 in a straight line direction. The function of the adhesive material 21 is to adhesively join the two

tapered portions

15 and 17 together, while the catheter 12 is sufficiently open during installation of the repair unit 10 to seal a portion of the conduit. It is considered that the bag 19 is configured to be rupturable when subjected to a backlog, and the position of the square can cause the adhering material to flow out along the tapered portion 15.

In order to prevent premature rupture of the bag 19 during opening of the catheter 12, a projection 23 is placed on the inner surface of the catheter 12, which is placed in this position to prevent backing of the outer surface of the tube and to rupture the package 19 during opening of the catheter 12. Until the

tapered portions

15 and 17 just reach the side-by-side placement position. The order of movement is shown in Figures 4, 5 and 6. The projections 23 may be formed as a single longitudinal edge, integrally formed with the catheter 12 or attached to the catheter 12 or a series of longitudinally defined indentations, etc., and disposed in a package that is opposite the direction of the tapered portion 15. One side, adjacent to the bag 19.

In order to constrain the catheter 12 in a rolled-up state for ease of transport and storage prior to use, an outer film sleeve 25 of polyethylene or the like is placed around the tube. The diameter of the outer film sleeve 25 is larger than the diameter of the opening conduit 12 The diameter is much smaller so that the constrained pipe can pass through the pipeline requiring repair in the longitudinal direction. An inner film sleeve 27 of similar material is placed inside the roll-up conduit 12 and the ends are heat sealed together with the respective ends of the outer film sleeve 25 to provide a moisture tight seal for the conduit 12 and the attachment bag 19.

The gasket sleeve 30 surrounds the outer film sleeve 25 in the circumferential direction, and is made of a gel-like material such as a modified polymer pitch. The gasket sleeve material is deformable and stretchable without rupturing, so that with the catheter 12 fully open, the gasket sleeve 30 can be extended along the radial direction and the original circumferential direction of the catheter 12, while at the same time providing thickness The decrease. The gasket sleeve 30 will eventually be pushed by the conduit 12 that is opened against the inner wall of the defective conduit portion, thereby providing a liquid seal between the conduit and the conduit portion. The material of the gasket sleeve 30 can adhere to the inner surface of the conduit portion and can conform to any irregularities within the interior. Preferably, it is not necessary that the gasket sleeve is adhesively bonded to the line section.

The nature of the gasket sleeve material is that it tends to bond most surfaces and materials. While this is an advantage for the sealing gasket, it presents difficulties in attempting to transport the unit and pass it through the pipeline to the defective portion. Accordingly, a tulle material having one or more layers can be formed as the sleeve 31, and the surrounding gasket sleeve 30 is defined in a relatively tensioned condition. The scrim material commonly used for this purpose is a common type used as a packaging material for packaging of oranges, grapes and the like. Such materials have a relatively tight surface under restraint so that the viscous gasket sleeve 30 acts to move the unit through the pipeline without any obstruction. As the catheter 12 begins to unravel, the tissue sleeve 31 is rolled tighter and the insertion guide extends axially into the interior of the gasket sleeve 30. In other words, the shim sleeve material "flows" and passes through the pores of the membrane to cover the gasket to prevent interference with the gasket sleeve sealing function.

While the tuft sleeve 31 should be sufficient to prevent the repair unit from sticking to other units and other surfaces during shipping and storage, a layer 33 of adhesively treated paper can be placed around the unit and stripped of the layer prior to installation.

In operation, referring to Figures 9 and 10, the unit is placed on the mandrel assembly 40 to transport the repair unit 10 to a defective pipe section which is in turn mounted on the skid 41. The prosthetic camera is dragged through the sewer line by dragging the mandrel assembly with a conventional type of motorized drag device 50. usually, Such a camera (not shown) is used in conjunction with the mandrel assembly 40 to allow for visual positioning of leak locations or other defects within the pipeline 35. Alternatively, the camera and the skid unit can be directly dragged with the ground power winch device. The tractor 50 and mandrel 40 are inserted into the main sewer line 35 through a mandrel hole 39 or other inlet inlet. The tractor 50 pulls up the mandrel assembly 40 (and the probe camera) through the drain line and moves to the next mandrel hole 37. A job monitoring vehicle with appropriate control and detection equipment is typically located at a leveling plane adjacent the mandrel hole 37, capable of controlling the movement of the trailer and camera while also controlling the injection of fluid under appropriate pressure.

The mandrel assembly 40 includes a rigid hollow cylindrical manifold 43 that receives pressurized gas from the gas conduit 45 through a device 46 placed in a section of the manifold. The multi-port 47 defines a cylindrical wall that passes through the manifold 43 and is typically covered by an inflatable bladder sleeve 49. Both ends of the bladder sleeve are clamped in a liquid-tight relationship with the outer side of the manifold 43, such that the gas passing through the port 47 causes the bladder sleeve to expand due to the pressure inside the manifold. The collapsible bladder sleeve 49 causes the repair unit 10 to open, as shown in the sequence of Figures 4, 5 and 6. In the case where most of them are in an open state, as shown in FIG. 4, the bag 19 is protected from being broken by the backing of the protrusions 23. As the tapering portion 17 passes over the projection 23, as shown in Fig. 5, the radioactive pressure exerted by the manifold 43 on most of the interior of the catheter 12 causes the packet to rupture and flow out along the tapered portion 15 of the catheter. cloth. When the catheter 12 is fully opened, as shown in Fig. 6, the

tapered portions

15 and 17 are placed side by side, and the adhesive placed between them will quickly stick the two together.

During the installation of the repair unit 10, debris is likely to get caught between the repair unit 10 and the pipeline wall. For example, the block will largely hinder the expansion of the repair unit 10 and can adversely affect the sealing function of the repair unit. To rule out this possibility, the mandrel assembly 40 can be used in conjunction with the spray device 70 in the form of a ring placed around one end of the mandrel 43 and includes an annular wire for receiving pressurized water or other cleaning liquid through the delivery conduit 71. A series of nozzles extend from the conduit and are placed at an angle that allows pressurized cleaning fluid to flush debris from the inner surface of the pipeline. Both the wire and the nozzle are placed at one end of the mandrel assembly 40, with the movement and passing through the line 35 to form the front end of the assembly. Accordingly, the debris is punched out from the line wall at the front end of the moving mandrel assembly. The debris that is loose from the pipe wall will eventually be replaced by ordinary effluent Crush out from the pipeline.

The mechanical characteristics of the repair unit include thickness, tension, and determination of the modulus of elasticity of the desired formation of the conduit 12. For example, the board is 0.200 inches thick and made of PVC Type 1 material, having a strength of approximately 64% of the strength of a standard SDR35 blowdown line, with a strength of approximately 8% of the same pipe for a sheet of similar material having a thickness of 0.100 inches. Of course, in order to avoid fluid restrictions in the pipeline to be repaired, the thickness of the panel must be controlled; however, for the actual thickness of the panel, the restriction on the fluid is only on the order of one or two percent. Typically, the thickness of the sheet used is 0.200 inches for unit 10. In order to repair a pipe having a pipe diameter of 8 inches, it is preferred that the mandrel forming the conduit 12 has a diameter of about 6 inches. This allows the catheter to be reduced in size to an outer diameter of approximately 5 inches and the package can be expanded to 8 inches without requiring excessive radial force.

The length of the conduit 12 is determined by the capabilities of the manufacturing equipment. If the catheter is protruding, virtually any length can be achieved. From a practical point of view, the length does not need to be longer than the longest part, because the longest part can put the pipeline that needs to be repaired. In the case of a sewage line, this length is approximately 2 feet, as determined by the typical inlet in the mandrel.

The diameter of the conduit 12 is determined such that there is at least 2 inches of overlap on the

tapered portions

15 and 17 for enabling the two to be glued together when the repair unit 10 is fully installed. The

tapered portions

15 and 17 are typically 3 inches long along the annular dimension of the catheter.

The foregoing is an important advantage of the present invention. The "Standard Specification for Drainage Tiles" specifies that the inner diameter of the designated 8-inch pipe should be 8 +/- 3/8 inches. This means that the outer ring of the repair equipment can range from 26.31 to 23.95 inches. In addition, the pipes used are often subject to chemical or mechanical corrosion, which further changes the internal environment of the pipes. The repair unit of the prior art cannot accommodate this range of diameters. The repair unit of the prior invention can accommodate this diameter range by allowing the allowable slack in the overlapping portions in the tapered

portions

15 and 17 in the state in which the unit is finally opened.

As described above, the purpose of the adhesive material 21 is to ensure that the overlapping portions of the tapered

portions

15 and 17 are mounted together to form a unitary cylinder or tube when the repair unit is installed. A preferred adhesion material for this purpose is a non-annular monomer that becomes a polymer when exposed to the catalyst. Preferred when needed To adhere the material, first apply it to the surfaces of the tapered surfaces 15 and 17. The strip 20 on the bag 19 is typically glued to the contact adhesive on the surface of the pipe 12, and the pipe 12 is in contact with the location where the attachment is ultimately left. The preferred material of the bag 19 is a nylon/metal foil/polyethylene film package 19 which is typically 1 inch wide by 2 inches long and heat sealed to the strip 20. The heat seal is typically about 1/4 inch along the three sides, but is gradually reduced by about 1/8 of an inch along the orientation so that the side can be first made when the package is squeezed as shown in Figures 5 and 6 rupture. In this way, the direction in which the adhesive material flows out can be predetermined.

The projections or spacers 23 maintain a certain space between the two joined deployment portions of the pipe so that the bag 19 does not break prematurely. As the pipe opens, the interior of the pipe meets but does not squeeze the bag until the tapered portion 17 leaves the projection 23. At this time, the pressure in the entire radial direction of the expansion mandrel assembly 40 is applied to the bag 19, which causes the adhering material 21 along the tapered surface 15 to be broken and stressed.

Once the adherent material is in contact with the catalyst previously applied to the tapered surfaces 15 and 17, the polymerization process begins. It takes about 30 seconds for the connector to continue to expand and securely fasten to the wall where the pipe needs to be repaired. Within two minutes, however, the adhesive has gained sufficient working strength and completed the entire installation process.

Different types of packages 19 are used within the scope of the present invention. A key feature is the provision of a characteristic container to control the flow of the contained bond material during rupture. It is characterized by having to be sufficiently light to hold the adhesive during the transfer and transport but must be broken when a force in the radial direction is applied directly to the bag.

In addition to the specific adhesion materials and catalysts described above, it is also possible to use a di-epoxy. Under this condition, the package will contain two fluid compartments. The reason for this arrangement is that when the package breaks, the two parts of the epoxy mix and then act. Solvent-based adhesives such as tetrahydrofuran and cyclohexanone can also be used for this purpose. However, the material's action time requirements are not as short as the aforementioned materials.

Although both the bag 19 and the projection 23 are shown placed on the inner surface of the tube 12 adjacent to the tapering portion 15, it should be understood that the bag and the protrusion can be placed on the outer surface of the tube 12 adjacent to the tapering portion 17. As an alternative embodiment.

Two scores 55 (only one of which is shown in Figure 1) are defined on opposite sides of the tube 12 to locate a cable 57 that can drag the repair unit through the pipeline. Each of the ends of the cable 57 has an eye 59 that is adaptively engaged by a hook (not shown) that pulls the cable. The two eyes 57 are respectively fitted into the score 55, so that in the case of a compact configuration of the repair unit, the connecting device is caught between the inner and outer surfaces of the cover 12. As the repair unit 10 expands to the point where the inner rim 13 passes through the cable 57, the cable 57 is allowed to fall freely into the center of the repair unit, where the cable can be removed. Prior to this, the eye 59 was caught by two scores to prevent the unit from moving within the annular ring during installation. The cable 57 can also be used for the function of the protrusion or spacer 23, and if it is properly prevented, premature compression of the package 19 during the collision during installation of the tube 12 can be ruled out.

The outer film sleeve, as described above, is typically a polyethylene film having a thickness of between 0.0005 and 0.006 inches; the most versatile thickness is 0.003 inches. The inner film sleeves typically have the same thickness. Due to the expansion of the crown 12 during installation, the heat seal between the

film sleeves

25 and 27 is broken so that the fluid will flush the inner film sleeve out of the pipeline. The outer film sleeve 25 has three basic functions, namely, the square tube 12 prior to installation; maintaining the drying of the tube 12 and providing a relatively low coefficient of friction to enable the tube to smoothly deploy or expand during installation.

As with the viscous washers mentioned above, it is preferred to use a modified polymeric asphalt which is capable of stretching approximately 800% without breaking. Such materials are made from Owens Corning Fiberglas. The non-extensible washer sleeve is typically 0.12 inches thick. As the repair unit 10 expands during installation, the gasket sleeve material expands and effectively reduces the thickness to 0.100 inches to form a gasket between the pipe walls and the expansion conduit 12. The modified polymeric asphalt adheres to the sidewalls of the pipe and alters any irregularities on the surface. An alternative material for the gasket sleeve 30 may be a closed cell foam rubber or other low durometer rubber. However, improved polymer tar is far from optimal. A disadvantage of the improved polymeric asphalt is that it will adhere to most of the plane. Of course this is a bit when the material is used as a gasket, but the material makes it impossible to move the repair unit 10 to the location of the defect in the pipeline. It is the use of film sleeves for this purpose.

As shown in FIG. 1, a plurality of repair units 10 are installed in series or in parallel to repair a relatively long one. Segment pipeline. This function is accomplished by the end of the service unit being tapered to allow a portion of one unit to be received at the other end of the other unit. It is for this purpose that the neck of one end of the unit is slightly reduced so as to smoothly interlock with the opposite side of the other unit.

The preferred embodiment of the service unit 10 described above is constructed as a straight cylinder. This causes the pipeline to be serviced to have a slight abrupt change in diameter at the end of the repair unit (i.e., typically a diameter reduction of about 0.25 inches). This, in turn, slightly increases the flow resistance and degrades the flow characteristics; it may form a pipe 12 having a diameter at both ends (ie, a reduced thickness) that is slightly smaller than the center portion, and when installing the unit, exhibits from the inner diameter of the service pipe to A smooth transition between the inner diameters of the repair unit 10.

Traditional TV cameras are used to locate defects to be repaired during installation. The service unit is typically attached to the sliding mounting mandrel assembly 40, and the mandrel is then moved through the cable and/or drag to the midline point of the defect as viewed by the inspection camera. Once the mandrel assembly 40 is at the center, the bladder sleeve expands to approximately 90 psi, which can cause expansion of the repair unit 10. The expansion repair unit is on the side wall of the repair pipe and causes cracking of the connected bag. After about 2 to 5 minutes, the bond is only good enough to reach the extent that the mandrel can expand and the principle of the station moves.

As described in the background section, prior art proximity pipeline repair utilizes a small amount of polymer and the felt is placed between the defective tubular section and the cured section. If the placement of the pipe has a large segment of the missing, only one alternative embodiment can use the prior art. In particular, both the thickness of the polymer and the thickness of the felt lining must be increased to ensure that the material has sufficient strength to withstand the forces applied to the defect during normal use. Adding additional thickness is expensive because the thickness of the entire lining must be increased simply because of the need for repairs at a single point. It is likely that the service unit 10 is installed at the defect in accordance with the present invention to provide additional structural strength. If this is done, it is only necessary to install the pipe 12 without installing the washer sleeve 30, as the latter is not required.

It will be seen from the foregoing description that the present invention provides a new method and apparatus in which defects in the pipeline can be easily and easily repaired on a permanent basis without the need to lose a lot of time in the pipeline operation.

Although the invention has been described with reference to specific illustrative embodiments, it is not subject to these The definition of the embodiments is only limited by the appended claims. It will be appreciated by those skilled in the art that the embodiments of the invention can be modified and modified without departing from the scope and spirit of the invention.

Claims

An unmanned ship-line maintenance unit characterized by:

The conduit (12) of plastic or metal material is split axially into two axial sides (11, 13), and the conduit (12) is initially formed as a flat material and then cut into appropriate dimensions, followed by a longitudinal edge (11, 13) Inclining or be tapered along the circumferential extent of the pipe, the tapered portion (15) is formed by removing the material constituting the outer surface of the conduit (12) from the surface, and the tapered portion of the other portion (17) It is formed by removing material from the inner surface of the pipe, and the tapered portions (15, 17) are discharged side by side. The thickness of the tapered portion discharged in parallel after being configured corresponds to the thickness of the material plate used for forming the conduit (12). Heating the conduit (12) in the furnace to form the flat plate used to reach its softening point and forming around the mandrel to approximate the diameter of the pipe to be repaired, said conduit (12) being fully open during installation of the repair unit (10) Thus sealing a part of the pipe;

At least one rupturable bag (19) comprising an adhesive material (21) placed on the inner surface of the catheter (12) adjacent to but not on the tapered portion (15), said adhesive material (21) attaching two tapered portions (15, 17) together;

The projection (23) is mounted on the inner surface of the conduit (12) to prevent backing of the outer surface of the conduit and to break the package (19) during opening of the conduit (12) until the tapered portion (15, 17) is just right. Before reaching the side by side position.
The unmanned ship-line maintenance unit according to claim 1, characterized in that the material of the conduit (12) is PVC or a metal material.
An unmanned ship-line service unit according to claim 1, wherein said duct (12) is formed by an extrusion method, and the forming step is generally used to shift the duct to an open state.
An unmanned ship-line maintenance unit according to claim 1, characterized in that a plurality of said packages (19) are carried by strips (20) of plastic material, when said bag (19) is adhered When the mixture is fixed on the pipe, it is arranged in parallel with the longitudinal side (11).
An unmanned ship-line maintenance unit according to claim 1, wherein: The protrusion (23) is a single longitudinal edge integrally formed with the catheter (12) or attached to the catheter (12) or longitudinally formed with a linear indentation and disposed along the direction of the tapered portion (15) On the opposite side of the bag, adjacent to the bag (19).
An unmanned ship-line maintenance unit according to claim 1, further comprising an outer film sleeve (25) of polyethylene and an inner film sleeve (27) placed around the pipe, said outer film The diameter of the sleeve (25) is much smaller than the diameter of the conduit (12) placed inside the rolled conduit (12) and corresponding to the ends and the outer film sleeve (25) The ends are heat sealed together to provide a moisture tight seal for the conduit (12) and the bag (19).
The unmanned ship-line maintenance unit according to claim 6, characterized in that the gasket sleeve (30) surrounds the outer film sleeve (25) in the circumferential direction, and the gasket sleeve (30) is made of rubber-like It is made of a viscous material that is deformable and stretchable without breaking.
An unmanned ship-line service unit according to claim 7, wherein said gasket sleeve (30) is made of modified polymer asphalt.
An unmanned ship-line maintenance unit according to any of claims 6-8, characterized in that a tulle material having one or more layers is formed as a tuft sleeve (31) and surrounding the gasket sleeve (30) is defined in a relatively tensioned state in which the curtain material is the usual type used as a packaging material.
An unmanned shipboard pipeline service apparatus according to claim 1, further comprising a spindle assembly (40) in which the unit is placed for transporting the repair unit (10) to a defective pipe section The mandrel assembly (40) is mounted on the skid (41) and further has a motorized drag device (50) for dragging the spindle assembly (40) to drag the probe television camera through the sewage Pipeline; also has a camera that is used in conjunction with the mandrel assembly (40) to allow for visual positioning of leak locations or other defects within the pipeline.