CN203549270U - Isolating-sleeve device for in-service permanent repairing of submarine pipeline - Google Patents
Isolating-sleeve device for in-service permanent repairing of submarine pipeline Download PDFInfo
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- CN203549270U CN203549270U CN201320614355.0U CN201320614355U CN203549270U CN 203549270 U CN203549270 U CN 203549270U CN 201320614355 U CN201320614355 U CN 201320614355U CN 203549270 U CN203549270 U CN 203549270U
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- submarine pipeline
- oversleeve
- pressure
- sleeve device
- bearing sleeve
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Abstract
The utility model discloses an isolating-sleeve device for the in-service permanent repairing of a submarine pipeline. The isolating-sleeve device comprises at least one pressure-bearing sleeve and two first connecting sleevelets, wherein the at least one pressure-bearing sleeve is sleeved at the outer part of at least one temporary repairing pipe clamp on the submarine pipeline, the two first connecting sleevelets are sleeved and hermetically connected onto the periphery of the submarine pipeline, and the two first connecting sleevelets are respectively connected to and communicated with both ends of the at least one pressure-bearing sleeve. The isolating-sleeve device is used for in-service permanent repairing of the submarine pipeline; compared with other permanent repairing modes, not only can expenses be saved, but also construction under pressure on the pipeline can be carried out without influencing the normal production of the pipeline, the influence on the integral strength of the pipeline is smaller after the construction is finished, and the isolating-sleeve device has the characteristics of low cost, capability in on-line maintenance, small influence on the submarine pipeline and the like and has good application prospect for the nearshore-segment permanent repairing of long-distance submarine pipelines.
Description
Technical field
The utility model relates to submarine pipeline maintenance technique field, relates in particular to a kind of distance sleeve device for the in-service permanent reparation of submarine pipeline.
Background technique
Often can there is breakage because of some special circumstances in the submarine pipeline of offshore section (hereinafter to be referred as sea pipe); such as boats and ships, fall that anchor is pounded Lou or drag anchor is scraped Lou sea pipe, dug husky dredger and dig broken the situations such as Hai Guan, in order to guarantee to produce or assurance air feed need to carry out emergency first-aid repair to extra large pipe.Emergency first-aid repair method often adopts the repair mode of temporary plugging pipe clamp, with mode the most efficiently guarantee to produce, the needs of life.
Yet temporary plugging pipe clamp is as a kind of interim fix tool, there is the problems such as design bearing capacity low and projected life is short, so will guarantee that the long-term safety of extra large pipe is produced, just must carry out permanent reparation to it.The method of conventional permanent reparation mainly contains at present: again lay new sea pipe; Stop production completely to replace and leak Duan Haiguan; Adopt bypass mode to change and leak Duan Haiguan.In above-mentioned these several modes, the extra large pipe mode cost of new laying is too high; Stopping production mode is completely changed and is leaked Duan Haiguan mode, needs to stop production, and in stopping production emptying process, will waste more gas or crude oil, and affects production output or life use; And adopt bypass mode to change leakage Duan Haiguan, also exist expense higher, on problems such as sea pipe impact itself are larger.
Model utility content
The technical problems to be solved in the utility model is, the distance sleeve device for the in-service permanent reparation of submarine pipeline that a kind of cost is low, do not need to stop production, do not affect production output and use is provided.
The utility model solves the technological scheme that its technical problem adopts: a kind of distance sleeve device for the in-service permanent reparation of submarine pipeline is provided, comprise that interim at least one the pressure-bearing sleeve of repairing pipe clamp outside of at least one that be sheathed on submarine pipeline and sheathed and two first of being sealedly connected in described submarine pipeline periphery connect oversleeves, two described first connect oversleeves and connect respectively and be communicated with the two ends at described at least one pressure-bearing sleeve.
Preferably, this distance sleeve device comprises at least two pressure-bearing sleeves, and this distance sleeve device also comprises that at least one is set in second in described submarine pipeline periphery and connects oversleeve; Between at least two described pressure-bearing sleeves, by described second, connecting oversleeve is connected in series vertically mutually.
Preferably, described pressure-bearing sleeve comprises cylindrical shell and connection and is communicated with the end socket at described cylindrical shell two ends, and the interior of described end socket successively decreases to one end of described cylindrical shell dorsad gradually towards described cylindrical shell one end without leave;
Described pressure-bearing sleeve is connected oversleeve by described end socket and described first and connects.
Preferably, described cylindrical shell is relatively welded and forms by two semi-circular cylinders, described end socket is relatively welded and forms by two semi-circular end socket unit, and with it, the annular end face in the face of one end of described cylindrical shell is welded on the annular end face of the corresponding one end of described cylindrical shell described end socket; And the weld seam that described two semi-circular cylinders weld formation relatively staggers mutually with described two relative weld seams that weld formation in semi-circular end socket unit;
Described first connects oversleeve is relatively welded and forms by two semi-circular oversleeve unit, and described end socket connects in the circumferential lateral surface of the corresponding one end of oversleeve in the face of the described first annular end face that connects one end of oversleeve is welded on described first with it; And the weld seam that described two semi-circular oversleeve unit weld formation relatively staggers mutually with described two relative weld seams that weld formation in semi-circular end socket unit.
Preferably, this distance sleeve device also comprises and being set between described interim reparation pipe clamp and described pressure-bearing sleeve, and opposite end is enclosed in the isolation capsule in described submarine pipeline periphery; Described isolation capsule is provided with pod apertures.
Preferably, the circumferential lateral surface of described pressure-bearing sleeve is provided with and connects to its inner hole portion; In the portion of described hole, be provided with the plug assembly of described hole portion sealing.
Preferably, described pressure-bearing sleeve is connected with described first on the outer surface of oversleeve and is equipped with corrosion-inhibiting coating.
Preferably, the described first periphery that connects oversleeve is provided with the anticorrosive heat-shrinkable cover of protecting to the joint between described the first connection oversleeve and described submarine pipeline.
Preferably, on described pressure-bearing sleeve, cathodic protection system is installed.
Preferably, described cathodic protection system comprises sacrificial anode; Described sacrificial anode is arranged on the outer surface of described pressure-bearing sleeve.
The utility model, for submarine pipeline in-service permanent reparation, the especially submarine pipeline of long-distance transport pipes offshore section, is applicable to the damaged submarine pipeline of interim maintenance process that also carried out; The utility model is compared other permanent repair modes not only can cost saving, construction with pressure on all right pipeline, do not affect the normal production of pipeline, the rear impact of the bulk strength on pipeline of having constructed is less, have that cost is low, the maintenance that can not stop production, on features such as sea pipe impact are little, for long defeated submerged pipeline offshore section, permanent reparation has good application prospect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the utility model one embodiment's the distance sleeve device for the in-service permanent reparation of submarine pipeline;
Fig. 2 is the sectional structure schematic diagram of the utility model one embodiment's the distance sleeve device for the in-service permanent reparation of submarine pipeline;
Fig. 3 is the structure for amplifying schematic diagram of A part in Fig. 2.
Embodiment
For technical characteristics of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1-2, the utility model one embodiment's the distance sleeve device for the in-service permanent reparation of submarine pipeline, comprises at least one pressure-bearing sleeve 1 and connects respectively and be communicated with two the first connection oversleeves 2 at the two ends of at least one pressure-bearing sleeve 1.Pressure-bearing sleeve 1 is connected oversleeve 2 all for being set in submarine pipeline 10 peripheries with first, first connects oversleeve 2 is also sealedly connected in submarine pipeline 10 peripheries; Described submarine pipeline 10 refers to the damaged submarine pipeline that needs reparation, further, position damaged on this submarine pipeline 10 is socketed with interim reparation pipe clamp 20, and at least one pressure-bearing sleeve 1 is on submarine pipeline 10 and be set at least one interim pipe clamp 20 outside of repairing.The first connection oversleeve 2 will be repaired pipe clamp 20 temporarily and be enclosed on submarine pipeline 10 together with pressure-bearing sleeve 1.In this distance sleeve device, by pressure-bearing sleeve 1, be connected the design of oversleeve 2 with first, solve interim problem of repairing pipe clamp 20 bearing capacities and life-span deficiency, reach the effect to submarine pipeline 10 permanent reparations, and this device does not need submarine pipeline 10 to stop production while installing, do not affect the normal production of submarine pipeline 10.
Wherein, the quantity of pressure-bearing sleeve 1 is according to interim quantity and the location positioning of repairing pipe clamp 20 on submarine pipeline 10.When this distance sleeve device comprises a pressure-bearing sleeve 1, two first connect the opposite end that oversleeve 2 is connected to this pressure-bearing sleeve 1.And the first internal diameter that connects oversleeve 2 is less than the internal diameter of pressure-bearing sleeve 1.The internal diameter of pressure-bearing sleeve 1 is main according to interim size setting of repairing pipe clamp 20, and the first internal diameter that connects oversleeve 2 is mainly according to the external diameter setting of submarine pipeline 10.When this distance sleeve device comprises at least two pressure-bearing sleeves 1, this distance sleeve device also comprises that at least one second connection oversleeve 3, the second connects oversleeves 3 also for being set in submarine pipeline 10 peripheries.Between at least two pressure-bearing sleeves 1, by second, connecting oversleeve 3 is connected in series vertically mutually.That is, each second one end that connects oversleeve 3 is connected with one end of last pressure-bearing sleeve 1, the relative the other end with after with one end of pressure-bearing sleeve 1, be connected.The second internal diameter that connects oversleeve 3 is less than the internal diameter of pressure-bearing sleeve 1, and the second internal diameter that connects oversleeve 3 is also according to the external diameter setting of submarine pipeline 10.Understandably, this submarine pipeline 10 comprises the submarine pipeline of straight length, also can comprise the submarine pipeline that elbow or flange connect.
On submarine pipeline 10, second connects oversleeve 3 between pressure-bearing sleeve 1, itself and the interim near distance of repairing pipe clamp 20, the impact of the temperature of welding on the sealing joint strip of interim reparation pipe clamp 20 when avoiding the second connection oversleeve 3 to install, this the second connection oversleeve 3 is set to kink, that is, do not need to be sealedly connected on submarine pipeline 10, only need be connected with pressure-bearing sleeve 1.
As shown in Figure 1, 2, in the present embodiment, this distance sleeve device comprises two pressure-bearing sleeves 1, is set in respectively two interim pipe clamp 20 outsides of repairing on submarine pipeline 10; Between these two pressure-bearing sleeves 1, by one second, connect oversleeve 3 and be connected in series, that is, second connects oversleeve 3 between two pressure-bearing sleeves 1, by self opposite end, is connected respectively with two pressure-bearing sleeves 1.The first connection oversleeve 2 is connected oversleeve 3 with second and is all tubular, and the second structure, material that connects oversleeve 3 can be identical with the first connection oversleeve 2.The first connection oversleeve 2, second connects oversleeve 3 and all can adopt the steel identical with submarine pipeline 10 to make, and pressure-bearing sleeve 1 adopts pressurized container steel to make, can bearing certain pressure.
Further, described pressure-bearing sleeve 1 comprises cylindrical shell 11 and connects and be communicated with the end socket 12 at cylindrical shell 11 two ends, and the interior of end socket 12 successively decreases to one end of cylindrical shell 11 dorsad gradually towards cylindrical shell 11 one end without leave.When two end sockets 12 are connected to cylindrical shell 11 opposite end, the global shape of the pressure-bearing sleeve 1 that end socket 12 and cylindrical shell 11 forms be broad in the middle, two is little.Wherein, pressure-bearing sleeve 1 is by its end socket 12, to be connected oversleeve 2 to connect with first with the first connection that is connected oversleeve 2; Between a plurality of pressure-bearing sleeves 1 that are connected, pressure-bearing sleeve 1 is by end socket 12, to be connected oversleeve 3 with second respectively to connect with the second connection that is connected oversleeve 3.The connection that above-mentioned pressure-bearing sleeve 1, first connects between oversleeve 2, the second connection oversleeve 3 etc. all adopts welding manner to realize.
For convenience of installing, the cylindrical shell 11 of pressure-bearing sleeve 1 can relatively be welded and form by two semi-circular cylinders, end socket 12 also can relatively be welded and form by two semi-circular end socket unit, and with it, the annular end face in the face of one end of cylindrical shell 11 is welded on the annular end face of cylindrical shell 11 corresponding one end end socket 12; And the weld seam 111 that two semi-circular cylinders weld formation relatively staggers mutually with two relative weld seams 121 that weld formation in semi-circular end socket unit, to avoid two weld seams 111,121 to be located axially on same straight line at pressure-bearing sleeve 1.Together with the circular weld 122 that this two weld seam 111,121 forms with cylindrical shell 11 welding with end socket 12, form T-shaped welding bead, but not cross welding bead reduces the stress of welding and concentrates.In the time of on being installed to submarine pipeline 10, also the weld seam of the first connection oversleeve 2 21 and the axial weld seam of submarine pipeline 10 are staggered.
In addition, first connects oversleeve 2 also can relatively be welded and form by two semi-circular oversleeve unit, and first connects oversleeve 2, and with it, the end socket 12 towards pressure-bearing sleeve 1 one end and pressure-bearing sleeve 1 welds together, that is, end socket 12 can be welded in the circumferential lateral surface of first connection oversleeve 2 corresponding one end by its annular end face in the face of one end of the first connection oversleeve 2.Equally, these two semi-circular oversleeve unit weld the weld seam 21 of formation and the relative weld seam 121 that welds formation in two semi-circular end socket unit of end socket 12 also staggers mutually relatively.When having at least two pressure-bearing sleeves 1, wherein, first connects oversleeve 2 is connected oversleeve 3 and relatively welds formation by two semi-circular oversleeve unit with second; First connects the weld seam equal 21,31 that oversleeve 2 is connected oversleeve 3 two semi-circular oversleeve unit with second relatively welds formation staggers mutually with two relative weld seams 121 that weld formation in semi-circular end socket unit.
Each first connection oversleeve 2 is welded in submarine pipeline 10 peripheries and is tightly connected with submarine pipeline 10 by its opposite end.Pressure-bearing sleeve 1 is connected in the periphery of the first connection oversleeve 2 one end of cylindrical shell 11 dorsad with its end socket 12; Between two adjacent pressure-bearing sleeves 1, the one end that is relative end socket 12 with it is connected in the periphery of the second connection oversleeve 3.
Preferably, the circumferential lateral surface of pressure-bearing sleeve 1 is provided with and connects to its inner hole portion 13, and the setting of hole portion 13 can be used for passing into air pressure, hydraulic pressure is tested the bearing capacity of pressure-bearing sleeve 1.Plug assembly 4 is installed in hole portion 13, for this hole portion 13 is sealed.Plug assembly 4 can comprise plug, back-up ring, seal ring, sealing gasket and the nut etc. that cooperatively interact in hole portion 13.
As shown in Figure 2,3, for protecting this distance sleeve device, at pressure-bearing sleeve 1, be connected with first on the outer surface of oversleeve 2 and be equipped with corrosion-inhibiting coating 5; In the present embodiment, this distance sleeve device also includes on the outer surface that the second connection oversleeve 3, the second connects oversleeves 3 and is also provided with corrosion-inhibiting coating 5.Periphery at the first connection oversleeve 2 is provided with the anticorrosive heat-shrinkable cover 6 that the joint between the first connection oversleeve 2 and submarine pipeline 10 is protected.In addition, on pressure-bearing sleeve 1, cathodic protection system is installed.Cathodic protection assembling system can comprise sacrificial anode 7; This sacrificial anode 7 is arranged on the outer surface of pressure-bearing sleeve 1.Preferably, sacrificial anode 7 is arranged on cylindrical shell 11 outer surfaces of pressure-bearing sleeve 1.The anode body 71 of this sacrificial anode 7 can be made by zinc alloy or magnesium alloy materials, is provided with iron core 72 in anode body 71, and iron core 72 stretches out the two ends of anode body 71 and is connected on cylindrical shell 11 outer surfaces.Equally, the part surface that this iron core 72 stretches out anode body 71 is also provided with corrosion-inhibiting coating.Anode body 71 can be bandlet shape, square body or the shape such as cylindric.This sacrificial anode 7 is by polarizing the pressure-bearing sleeve of steel 1, and polarization potential is in steel protective potential range, thus fine protection pressure-bearing sleeve 1.
For eliminating interim reparation pipe clamp 20 leakages, cause pressure-bearing sleeve 1 to be connected the welding fire operation risk of oversleeve 2 with first, this distance sleeve device also comprises isolation capsule 8, isolation capsule 8 is set between interim reparation pipe clamp 20 and pressure-bearing sleeve 1, and opposite end is enclosed in submarine pipeline 10 peripheries.Isolation capsule 8 will be repaired between pipe clamp 20 and pressure-bearing sleeve 1 temporarily and isolate; Prior to pressure-bearing sleeve 1, be arranged on interim reparation pipe clamp 20 when mounted, the naked light producing between follow-up pressure-bearing sleeve 1 installation period, high temperature and the interim pipe clamp 20 of repairing are isolated.Isolation capsule 8 adopts metallic material to make, and the sealing between its two ends and submarine pipeline 10 adopts ring-shaped rubber seal ring to realize.Isolation is also provided with pod apertures 81 on capsule 8, and this pod apertures 81 can will drain to safety zone from repair pipe clamp 20 interior contingent gas leakages etc. temporarily by nitrogen circulation, as the hole portion 13 of passing by connecting tube on pressure-bearing sleeve 1 draws.
With reference to figure 1-3, this distance sleeve device installation process is as follows: the submarine pipeline 10 in need reparation is constructed steel sheet-pile cofferdam around, builds dry construction environment; Excavation pit exposes the submarine pipeline 10 that needs reparation; Submarine pipeline 10 two ends of exposing are supported; Submarine pipeline 10 and its upper interim pipe clamp 20 of repairing are carried out to surface treatment (comprise and clear up the outstanding bolt etc. that pipeline cement weight coating, coating, cutting are repaired pipe clamp temporarily) to adapt to the installation of distance sleeve device; First at the interim outer installation isolation of pipe clamp 20 capsule 8 of repairing, for water conservancy diversion, repair may the meet accident situation of gas leakage of pipe clamp 20 temporarily; Then assemble and welding is connected with submarine pipeline 10 first connects oversleeve 2; Then at pressure-bearing sleeve 1 between the first connection oversleeve 2, on the outer assembly welding of isolation capsule 8; Finally installation of sacrifice anode 7 grades and at the first connection oversleeve 2, the outer coating corrosion-inhibiting coating 5 of pressure-bearing sleeve 1 on pressure-bearing sleeve 1, complete the integral installation of distance sleeve device.Wherein, for a plurality of interim reparation pipe clamps 20, also need between a plurality of interim reparation pipe clamps 20, assemble the second connection oversleeve 3, then distinguish a plurality of pressure-bearing sleeves 1 on corresponding interim reparation pipe clamp 20 assembly weldings, finally also at the outer coating corrosion-inhibiting coating 5 of the second connection oversleeve 3.
After this distance sleeve device is installed, also need it to carry out leak test test, after completing, carry out again backfill foundation ditch, dismounting cofferdam etc. and resume work.Wherein, when this distance sleeve device is installed, can construction with pressure on pipeline, do not affect pipeline and normally produce, the rear impact of the bulk strength on pipeline of construct is less, for growing the permanent reparation of defeated submerged pipeline offshore section, has good application prospect.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. the distance sleeve device for the in-service permanent reparation of submarine pipeline, it is characterized in that, comprising that at least one that be sheathed on submarine pipeline (10) is interim repairs at least one outside pressure-bearing sleeve (1) of pipe clamp (20) and sheathed and two first of being sealedly connected in described submarine pipeline (10) periphery connect oversleeves (2), and two described first connect oversleeves (2) and connect respectively and be communicated with the two ends at described at least one pressure-bearing sleeve (1).
2. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1, it is characterized in that, this distance sleeve device comprises at least two pressure-bearing sleeves (1), and this distance sleeve device also comprises that at least one is set in second in described submarine pipeline (10) periphery and connects oversleeve (3); Between at least two described pressure-bearing sleeves (1), by described second, connecting oversleeve (3) is connected in series vertically mutually.
3. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1, it is characterized in that, described pressure-bearing sleeve (1) comprises cylindrical shell (11) and connects and be communicated with the end socket (12) at described cylindrical shell (11) two ends, and the interior of described end socket (12) successively decreases to one end of described cylindrical shell (11) dorsad gradually towards described cylindrical shell (11) one end without leave;
Described pressure-bearing sleeve (1) is connected oversleeve (2) by described end socket (12) and connects with described first.
4. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 3, it is characterized in that, described cylindrical shell (11) is relatively welded and forms by two semi-circular cylinders, described end socket (12) is relatively welded and forms by two semi-circular end socket unit, and with it, the annular end face in the face of one end of described cylindrical shell (11) is welded on the annular end face of the corresponding one end of described cylindrical shell (11) described end socket (12); And weld seam (111) weld seam (121) that weld formation relative to described two semi-circular end socket unit that described two semi-circular cylinders weld formation relatively staggers mutually;
Described first connects oversleeve (2) is relatively welded and forms by two semi-circular oversleeve unit, and described end socket (12) connects in the circumferential lateral surface of the corresponding one end of oversleeve (2) in the face of the described first annular end face that connects one end of oversleeve (2) is welded on described first with it; And weld seam (21) weld seam (121) that weld formation relative to described two semi-circular end socket unit that described two semi-circular oversleeve unit weld formation relatively staggers mutually.
5. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1, it is characterized in that, this distance sleeve device also comprises and being set between described interim reparation pipe clamp (20) and described pressure-bearing sleeve (1), and opposite end is enclosed in the isolation capsule (8) in described submarine pipeline (10) periphery; Described isolation capsule (8) is provided with pod apertures (81).
6. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1, is characterized in that, the circumferential lateral surface of described pressure-bearing sleeve (1) is provided with and connects to its inner hole portion (13); In described hole portion (13), be provided with the plug assembly (4) of described hole portion (13) sealing.
7. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1, is characterized in that, described pressure-bearing sleeve (1) is connected with described first on the outer surface of oversleeve (2) and is equipped with corrosion-inhibiting coating (5).
8. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 1; it is characterized in that, the described first periphery that connects oversleeve (2) is provided with and connects to described first the anticorrosive heat-shrinkable cover (6) that the joint between oversleeve (2) and described submarine pipeline (10) is protected.
9. according to the distance sleeve device for the in-service permanent reparation of submarine pipeline described in claim 1-8 any one, it is characterized in that, on described pressure-bearing sleeve (1), cathodic protection system is installed.
10. the distance sleeve device for the in-service permanent reparation of submarine pipeline according to claim 9, is characterized in that, described cathodic protection system comprises sacrificial anode (7); Described sacrificial anode (7) is arranged on the outer surface of described pressure-bearing sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614355.0U CN203549270U (en) | 2013-09-30 | 2013-09-30 | Isolating-sleeve device for in-service permanent repairing of submarine pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614355.0U CN203549270U (en) | 2013-09-30 | 2013-09-30 | Isolating-sleeve device for in-service permanent repairing of submarine pipeline |
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| Publication Number | Publication Date |
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| CN203549270U true CN203549270U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320614355.0U Withdrawn - After Issue CN203549270U (en) | 2013-09-30 | 2013-09-30 | Isolating-sleeve device for in-service permanent repairing of submarine pipeline |
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| CN (1) | CN203549270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485468A (en) * | 2016-02-01 | 2016-04-13 | 上海市基础工程集团有限公司 | In-situ repair construction technology for seabed PE pipeline |
-
2013
- 2013-09-30 CN CN201320614355.0U patent/CN203549270U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485468A (en) * | 2016-02-01 | 2016-04-13 | 上海市基础工程集团有限公司 | In-situ repair construction technology for seabed PE pipeline |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140416 Effective date of abandoning: 20151209 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |