CN114909542A - Oil and gas pipeline defect repairing device and method - Google Patents
Oil and gas pipeline defect repairing device and method Download PDFInfo
- Publication number
- CN114909542A CN114909542A CN202210662869.7A CN202210662869A CN114909542A CN 114909542 A CN114909542 A CN 114909542A CN 202210662869 A CN202210662869 A CN 202210662869A CN 114909542 A CN114909542 A CN 114909542A
- Authority
- CN
- China
- Prior art keywords
- oil
- gas pipeline
- winding
- repairing
- repair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007547 defect Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008439 repair process Effects 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 19
- 230000002950 deficient Effects 0.000 claims abstract description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 5
- 241001330002 Bambuseae Species 0.000 claims abstract description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 5
- 239000011425 bamboo Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000001680 brushing effect Effects 0.000 claims description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 11
- 239000003822 epoxy resin Substances 0.000 claims description 10
- 229920000647 polyepoxide Polymers 0.000 claims description 10
- 239000004593 Epoxy Substances 0.000 claims description 6
- 239000011300 coal pitch Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 17
- 238000010276 construction Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009787 hand lay-up Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/1683—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of a patch which is fixed on the wall of the pipe by means of an adhesive, a weld or the like
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/1686—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by winding a tape
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to an oil and gas pipeline defect repairing device and method, and belongs to the technical field of pipeline defect repairing. Oil gas pipeline defect prosthetic devices includes: the upper part and the lower part of the semi-cylindrical barrel bodies are connected through detachable connecting pieces to form a cylindrical repairing barrel, and an annular welding seam groove is formed in the repairing barrel. Has the advantages that: can wrap up body defective position fast, and repair a section of thick bamboo through dismantling the connected mode installation, can improve work efficiency.
Description
Technical Field
The invention belongs to the technical field of pipeline defect repair, and particularly relates to an oil and gas pipeline defect repair device and method.
Background
The pipeline transportation is one of the most economical, most convenient and most main transportation modes of petroleum and natural gas, has the advantages of low cost, large transportation volume, small occupied area, safety, reliability, high automation degree, high labor production efficiency and the like, has an extremely important strategic position in national economy, is widely applied to the fields of industry, civilian use and the like, is known as the national economic life line, has 14 kilometers of oil and gas pipelines which are in service operation at home at present, and has disastrous consequences such as huge economic loss, casualties, environmental pollution and the like due to interference and corrosion of the external environment of the pipelines, pipe material, construction quality and other reasons, thereby causing fire and explosion, seriously affecting the stable operation of social economy, endangering the life safety of people, and in order to avoid more pipeline accidents, defects are discovered in the daily maintenance process of the pipelines and should be timely processed or repaired, the existing pipeline repair adopts a welding seam mode, so that the safety of the construction process is not high, and the repair time is long.
Disclosure of Invention
The invention aims to solve the technical problems and provides an oil and gas pipeline defect repairing device which can be used for rapidly wrapping the defect position of a pipe body and improving the working efficiency by installing a repairing cylinder in a detachable connection mode.
The technical scheme for solving the technical problems is as follows: oil gas pipeline defect prosthetic devices includes: the upper portion and the lower portion of the semi-cylindrical barrel are connected through detachable connecting pieces to form a cylindrical repairing barrel, and an annular welding seam groove is formed in the repairing barrel.
Has the advantages that: can wrap up body defective position fast, and repair a section of thick bamboo through dismantling the connected mode installation, can improve work efficiency.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the detachable connecting piece is a hinge or an occlusion port or a friction surface connecting piece or a bolt.
The beneficial effect of adopting the further scheme is that: the connection mode can be selected in various ways, the upper part and the lower part of the repair cylinder can be connected in any two combination modes, and the assembly and the disassembly are convenient.
Further, the weld groove is a spiral weld groove or a straight weld groove or a flat weld groove.
The beneficial effect of adopting the further scheme is that: the weld groove is determined according to the weld characteristics of the construction object, and the selection is various.
Further, the bite mouth is a single flat bite mouth or a single vertical bite mouth or a combined angle bite mouth or a snap-button type bite mouth or a corner bite mouth.
The beneficial effect of adopting the above further scheme is: the fixing effect is good, and the assembly and the disassembly are convenient.
Further, the friction surface connecting piece is a steel brush surface or a high-density rubber surface or a small round bead surface.
The beneficial effect of adopting the further scheme is that: simple structure, can effectively connect a restoration section of thick bamboo.
The method for repairing the defects of the oil and gas pipeline comprises the following steps:
s1: carrying out depressurization or stopping conveying on the defective pipe body, and determining the size and the connection mode of the sleeve;
s2: pretreating the outer surface of the defective pipe body, removing an anticorrosive coating, cleaning and drying;
s3: after the welding seam groove (2) of the repair cylinder is aligned with the welding seam of the pipe body, the pipe body is fixed on the repair cylinder;
s4: and (5) winding the outer wall of the repair cylinder by a fixture.
The beneficial effects are that: the steel cylinder body is repaired in a non-welding buckling type mode, the construction process is safe and economical, the construction method is simple to operate, the repair time is short, and electric support is not needed.
Further, in step S3, before aligning the repair cylinder with the pipe body, the metal repair agent needs to be painted on the inner wall of the repair cylinder.
The beneficial effect of adopting the above further scheme is: and (3) repairing the surface of the metal part to be repaired, so as to repair the metal or endow the metal surface with special functions.
Further, in step S4, the winding of the fixture includes one or more of fixing and winding a polyethylene cold winding tape, fixing and winding a polypropylene cold winding tape, winding and locking an iron chain, brushing epoxy resin, brushing epoxy coal pitch, brushing glass fiber epoxy coal pitch, and brushing and winding an epoxy resin carbon fiber composite material.
The beneficial effect of adopting the further scheme is that: the barrel is further fixed and repaired, and the stability is improved.
Drawings
FIG. 1 is a schematic structural view of a semi-cylindrical barrel;
FIG. 2 is a schematic structural diagram according to a first embodiment;
FIG. 3 is a schematic view showing an installation position of the detachable connecting member according to the first embodiment;
FIG. 4 is a schematic structural diagram of the second embodiment;
FIG. 5 is a schematic structural view of the third embodiment;
FIG. 6 is a view showing one of the structural diagrams of a detachable connecting member according to the fourth embodiment;
FIG. 7 is a second schematic structural view of a detachable connection member according to a fourth embodiment;
FIG. 8 is a third schematic structural view of a detachable connection member according to a fourth embodiment;
FIG. 9 is a schematic structural view showing a schematic structural view of a detachable connecting member according to a fifth embodiment;
FIG. 10 is a graph showing the bending resistance test of the repaired pipe in the first experimental example;
FIG. 11 is a graph showing the internal pressure resistance test of the repaired pipe in example II;
FIG. 12 is a graph of pipeline pressure after repair in Experimental example two;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a semi-cylindrical barrel; 2. a weld groove; 3. a hinge; 4. an occlusal orifice; 5. a steel brush face; 6. a bolt; 7. a high density rubber face; 8. small ball surface.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the present embodiment provides an oil and gas pipeline defect repairing apparatus, which includes two semi-cylindrical cylinders 1, wherein the material is selected from materials having an elastic modulus, a yield strength, and a hardness similar to or the same as that of the steel of the pipe body to be constructed, the elastic modulus is not less than 90% of the elastic modulus of the steel of the pipe body, the yield strength is not less than 95% of the yield strength of the steel of the pipe body, and the hardness is not less than 85% of the hardness of the steel of the pipe body, but not more than HB320 in the highest degree. The upper parts and the lower parts of the two semi-cylindrical barrel bodies 1 are connected through detachable connecting pieces to form a cylindrical repairing barrel, and the integral radius of the steel repairing barrel is 100.5-105% of the radius of the pipe body and is not more than 5mm of the radius of the pipe body to the maximum extent; the axial length is 1500mm-2500 mm; the overall ovality is 2% -4% of the sleeve outer diameter SD when the pipe diameter PD of a construction object is less than 508mm, is 1.5% -2.5% of the SD when the PD is more than 508mm, is 80-150% of the wall thickness of the construction object when the PD is less than 508mm, and is 60-120% of the wall thickness of the construction object when the PD is less than 508 mm; an annular welding seam groove 2 is arranged in the repair cylinder, and the welding seam groove 2 is divided into a spiral welding seam groove, a straight welding seam groove and a flat welding seam groove according to the welding seam characteristics of a construction object. The interference magnitude of the curvature radius of the groove compared with the actual curvature radius of the welding line is 0.50-4.50 mm, the interference rate is 8-60%, and the height of the groove is not more than 7% of the thickness of the sleeve.
Example one
As shown in fig. 2 and 3, the upper parts of the two semi-cylindrical cylinders 1 are provided with engaging ports 4 which are matched with each other, and the lower parts are provided with hinges 3 which are connected through a common pin shaft.
Example two
The difference between the present embodiment and the first embodiment is characterized in that:
as shown in fig. 4, hinges 3 are arranged on the upper portion and the lower portion of each of the two semi-cylindrical cylinders 1, the hinges 3 are connected through a common pin shaft and welded to the sleeve body in advance, the diameter of each hinge 3 is smaller than or equal to the thickness of the sleeve wall, and the inner side and the outer side of each hinge are not higher than the pipe wall, so that the protruding structures are prevented from causing obstacles to tight attachment of an inner construction object and an outer composite material.
EXAMPLE III
The present embodiment is different from the second embodiment in that:
as shown in figure 5, the upper part and the lower part of the two semi-cylindrical cylinders 1 are provided with mutually matched bite openings 4, and the bite interference is 20-35% of the wall thickness of the sleeve.
Example four
The present embodiment is different from the third embodiment in that:
as shown in fig. 6, the upper and lower parts of the two semi-cylindrical cylinders 1 are connected by using steel brush surfaces 5; or any one of the upper part and the lower part is connected by a steel brush surface 5, the other one adopts a detachable connecting piece structure in other embodiments, and the interference magnitude of the steel brush friction surface is 30-60% of the wall thickness of the sleeve;
as shown in fig. 7, the upper part and the lower part of the two semi-cylindrical cylinders 1 are connected by a high-density rubber surface 7; or one of the upper part and the lower part is connected by a high-density rubber surface 7, the other one adopts a detachable connecting piece structure in other embodiments, and the interference of the high-density rubber friction surface is 15-25% of the wall thickness of the sleeve;
as shown in fig. 8, the upper part and the lower part of the two semi-cylindrical cylinders 1 are connected by small ball surfaces 8; or the upper part and the lower part are connected by the small ball surface 8, the other one adopts the detachable connecting piece structure in other embodiments, and the interference of the small ball friction surface is 10-30% of the wall thickness of the sleeve.
EXAMPLE five
The present embodiment is different from the fourth embodiment in that:
as shown in fig. 9, the upper and lower parts of the two semi-cylindrical cylinders 1 are connected by bolts 6; or any one of the upper part and the lower part is connected by a bolt 6, and the other one adopts a detachable connecting piece structure in other embodiments; the radius of the holes for bolt connection is 60-200% of the wall thickness of the sleeve, the radius of the holes for connecting pieces is 100-300% of the wall thickness of the sleeve, the length of the connecting pieces is 30-60 mm, the distance between the centers of the two holes is in an equal difference array with 1mm as a tolerance, and the distance between the holes is not less than 3 mm.
The method for repairing the defects of the oil and gas pipeline comprises the following steps:
s1: carrying out depressurization or stopping conveying on the defective pipe body, and determining the size and the connection mode of the sleeve;
s2: pretreating the outer surface of the defective pipe body, removing an anticorrosive coating, cleaning and drying;
s3: aligning the welding seam groove 2 of the repair cylinder with the welding seam of the pipe body, and fixing the repair cylinder on the pipe body;
s4: and (5) winding the outer wall of the repair cylinder by a fixture.
Further, in step S3, before aligning the repair cylinder with the pipe body, a metal healant is coated on the inner wall of the repair cylinder, wherein the metal healant is one or more of recovered 10780, obstinate JL1202, obstinate JL757, hui HR8102, hui ri 8101, hui ri HR8112, hui ri HR8114 hui HR8215, tyle 44143, corsain TS626, corsain TS406, hui glue TX8518, ciya HT101, tiansain TS6111, and tiansain TS 111.
Further, in step S4, the fixture winding includes one or more of fixing and winding a polyethylene cold winding tape, fixing and winding a polypropylene cold winding tape, winding and locking an iron chain, brushing epoxy resin, brushing epoxy coal pitch, brushing glass fiber epoxy coal pitch, and brushing and winding an epoxy resin carbon fiber composite material.
Experimental example 1
The design and manufacture of the buckled steel sleeve for repairing the non-welded pipe body and the simulation field test for repairing the pipeline are carried out on a certain natural gas pipeline test field in Beijing. The buckled steel sleeve has the characteristics of special arc line structures, hinges and bolt reinforcing plate structures, so that the machining difficulty is high. Through deep research and extensive discussion, technical members cooperate with mechanical factories deeply, the problems of large machining allowance, complex shape, high dimensional precision, long machining time consumption and the like of workpieces are overcome, cutting data are adjusted repeatedly, the problems of poor toughness and easy deformation in cutting of X70 pipes are solved by adopting processes of multi-layer, small cutting depth, quick feeding, axial rotation and the like, the machining precision is improved, and a set of finished products with accurate size and high strength are manufactured after more than 100 hours. The whole processing process and the finished product are shown in attached figure 1 and attached figure 1. The finished product is qualified through mechanical inspection and verification, and passes the tube body defect repair test verification of the OD1016mm pipeline.
The sleeve is made of X70 tubular steel, the diameter of the inner wall is 1022mm, namely the gap between the inner wall and the pipeline is 3mm, so that the high-strength metal repairing agent can be filled. The inner side of the steel sleeve main body is provided with a spiral weld groove (accurately matched with a pipe-making spiral weld of a pipeline to be repaired), the connecting device is connected through a hinge (pin shaft hinge) on one side, the other side of the connecting device is connected through a bolt, the connecting device is fixed on the steel sleeve main body structure in a pre-welding mode, and the steel sleeve main body structure is fixed in a telescopic installation mode through a manual bolt screwing mode during site construction.
When the device is installed on site, the part to be repaired is subjected to sand blasting rust removal, and the surface treatment grade reaches Sa2.5 grade. And then brushing a Saito TS626 high-strength metal repairing agent, and installing the sleeve within 20min after the brushing is finished. One end of the sleeve is connected in advance by a hinge structure, the other side of the sleeve is fastened by a bolt after being aligned, and the hydraulic jack and the crane are adopted for position adjustment and sleeve support in the whole process.
After the sleeve is installed, the carbon fiber epoxy resin composite material is wound on the outer surface of the sleeve by a hand lay-up method. And after 6 hours, the epoxy resin is completely dried, and all repairing operations are finished.
The pipeline circumferential weld defect in the experimental example is a volume defect with 70% of wall thickness depth, the sleeve is adopted for repairing, and the four-point bending test and the pressure resistance test are both qualified, so that the bending resistance and the internal pressure resistance required by the pipeline are achieved. Wherein the bending resistance finally generates pipeline plastic deformation under the conditions that two ends respectively have 8 tons and the internal pressure is 10MPa, but the position of the circumferential weld joint does not lose efficacy, as shown in figure 10; the internal pressure resistance test is carried out under a design pressure of 10MPa without pipe failure when the pipe is pressed to 14MPa and kept for 30min, as shown in FIG. 11.
Second example of experiment
The second design and manufacture of the buckled steel sleeve for repairing the non-welded pipe body and the simulation field test of the pipeline repair are carried out on a certain natural gas pipeline test site in Shenyang. The outer diameter of the pipeline to be repaired is OD1422mm, and the material is X80 tubular steel. The buckled steel sleeve is similar to the first design and manufacturing process, but the increase of the pipe diameter of the pipeline to be repaired is considered, so that the sleeve is designed into a 3-segment structure, and 1 part of the 3-part connecting position is in hinge connection (pin shaft hinge connection), and the other 2 parts are in bolt connection.
When the device is installed on site, the part to be repaired is subjected to sand blasting rust removal, and the surface treatment grade reaches Sa2.5 grade. And then brushing a Saito TS406 high-strength metal repairing agent, and installing the sleeve within 30min after the brushing is finished. One end of the sleeve is connected in advance by a hinge structure, the other two sides of the sleeve are aligned and then fastened by bolts, and a hydraulic jack and a crane are adopted for position adjustment and sleeve support in the whole process.
After the sleeve is installed, the carbon fiber epoxy resin composite material is wound on the outer surface of the sleeve by a hand lay-up method. And after 6 hours, the epoxy resin is completely dried, and all repairing operations are finished.
The pipeline circumferential weld defect in the experimental example is a volume defect with 60% of wall thickness depth, the sleeve is adopted for repairing, and the pipe is qualified through a pressure resistance test, a pressure fluctuation test and an explosion test, so that the bending resistance and internal pressure resistance effects required by the pipeline are achieved. Wherein the pressure test is that the pressure is released after the pressure is increased to 20MPa and maintained for 30min, and the pipeline does not lose efficacy; the pressure fluctuation test is carried out through pressure circulation of 12-18MPa for 100 times, and the pipeline does not fail; the blasting test is that the pipe is continuously pressed until the pipe is blasted, and finally the pipe fails and bursts at 25MPa, and the failure position is positioned at a normal pipe body instead of the defect of the circumferential weld of the pipe, which proves that the repairing technology provided by the invention exceeds the normal strength of the pipe. The pressure test data is shown in FIG. 12.
The 2 experimental examples prove that the repairing device provided by the invention has the advantages of good bending resistance and excellent axial stress resistance, and the repaired oil and gas pipeline can reach or even exceed the initial mechanical property level of the pipeline. The 2 experimental examples of the invention verify the feasibility of the buckling steel sleeve for repairing the non-welded pipe body and the method for repairing the circumferential weld defect and the volume loss defect of the oil and gas pipeline, and provide an effective solution for repairing the pipeline without fire in the whole process.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides an oil gas pipeline defect prosthetic devices, its characterized in that includes two semi-cylindrical barrel (1), two the upper portion, the lower part of semi-cylindrical barrel (1) are all connected and are constituteed a columniform restoration section of thick bamboo through dismantling the connecting piece, be equipped with annular welding seam slot (2) in the restoration section of thick bamboo.
2. The oil and gas pipeline defect remediating device of claim 1, wherein the detachable connection is a hinge (3) or a snap joint (4) or a friction surface connection or a bolt (6).
3. The oil and gas pipeline defect repair device according to claim 1, wherein the weld groove (2) is a spiral weld groove or a straight weld groove or a flat weld groove.
4. The oil and gas pipeline defect repair device according to claim 2, wherein the bite (4) is a single flat bite or a single vertical bite or a joint angle bite or a snap-on bite or a corner bite.
5. The oil and gas pipeline defect remediating device as defined in claim 2, wherein the friction surface connection is a steel brush surface (5) or a high density rubber surface (7) or a small bead surface (8).
6. An oil and gas pipeline defect repairing method, characterized in that the oil and gas pipeline defect repairing device of any one of claims 1-5 is adopted, and comprises the following steps:
s1: carrying out depressurization or stopping conveying on the defective pipe body, and determining the size and the connection mode of the sleeve;
s2: pretreating the outer surface of the defective pipe body, removing an anticorrosive coating, cleaning and drying;
s3: after the welding seam groove (2) of the repair cylinder is aligned with the welding seam of the pipe body, the pipe body is fixed on the repair cylinder;
s4: and (5) winding the outer wall of the repair cylinder by a fixture.
7. The method for repairing defects in an oil and gas pipeline as claimed in claim 6, wherein in step S3, before aligning the repair cylinder with the pipeline body, a metallic repair agent is applied to the inner wall of the repair cylinder.
8. The method for repairing a defect in an oil and gas pipeline according to claim 7, wherein in step S4, the fixture winding includes one or more of fixing and winding a polyethylene cold winding tape, fixing and winding a polypropylene cold winding tape, winding and locking an iron chain, brushing epoxy resin, brushing epoxy coal pitch, brushing glass fiber epoxy coal pitch, and brushing and winding epoxy resin carbon fiber composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210662869.7A CN114909542A (en) | 2022-06-06 | 2022-06-06 | Oil and gas pipeline defect repairing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210662869.7A CN114909542A (en) | 2022-06-06 | 2022-06-06 | Oil and gas pipeline defect repairing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114909542A true CN114909542A (en) | 2022-08-16 |
Family
ID=82769705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210662869.7A Pending CN114909542A (en) | 2022-06-06 | 2022-06-06 | Oil and gas pipeline defect repairing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114909542A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082162A (en) * | 1993-03-11 | 1994-02-16 | 浙江大学 | The pressure cylinder pasting board adds wrapping wire explosion-suppressing method and device |
| US20060118191A1 (en) * | 2004-12-03 | 2006-06-08 | Rice Brian L | System and method for pipe repair |
| CN201310708Y (en) * | 2008-08-13 | 2009-09-16 | 中国石油天然气股份有限公司 | Pipeline spiral weld defect repairing structure |
| US20100012215A1 (en) * | 2008-07-18 | 2010-01-21 | Tdw Delaware, Inc. | Composite Load Transferring Technique |
| CN204554226U (en) * | 2015-04-27 | 2015-08-12 | 戴海磊 | A kind of Novel firefighting hose gaiter |
| CN204942907U (en) * | 2015-08-10 | 2016-01-06 | 中国石油天然气集团公司 | A kind of coated oversleeve |
| CN206221894U (en) * | 2016-10-31 | 2017-06-06 | 西安石油大学 | A kind of hinge type antiskid sealing clamp |
| CN211398998U (en) * | 2019-12-30 | 2020-09-01 | 沧州隆泰迪管道科技有限公司 | Sleeve for repairing pipeline |
| CN112610797A (en) * | 2020-12-02 | 2021-04-06 | 西安石油大学 | Protection device and protection method for damage and fracture of gas transmission pipeline |
| CN213840041U (en) * | 2020-12-14 | 2021-07-30 | 沈阳圣凯龙输油管道技术服务有限责任公司 | B-type sleeve for repairing circumferential weld defects of oil and gas pipelines |
-
2022
- 2022-06-06 CN CN202210662869.7A patent/CN114909542A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082162A (en) * | 1993-03-11 | 1994-02-16 | 浙江大学 | The pressure cylinder pasting board adds wrapping wire explosion-suppressing method and device |
| US20060118191A1 (en) * | 2004-12-03 | 2006-06-08 | Rice Brian L | System and method for pipe repair |
| US20100012215A1 (en) * | 2008-07-18 | 2010-01-21 | Tdw Delaware, Inc. | Composite Load Transferring Technique |
| CN201310708Y (en) * | 2008-08-13 | 2009-09-16 | 中国石油天然气股份有限公司 | Pipeline spiral weld defect repairing structure |
| CN204554226U (en) * | 2015-04-27 | 2015-08-12 | 戴海磊 | A kind of Novel firefighting hose gaiter |
| CN204942907U (en) * | 2015-08-10 | 2016-01-06 | 中国石油天然气集团公司 | A kind of coated oversleeve |
| CN206221894U (en) * | 2016-10-31 | 2017-06-06 | 西安石油大学 | A kind of hinge type antiskid sealing clamp |
| CN211398998U (en) * | 2019-12-30 | 2020-09-01 | 沧州隆泰迪管道科技有限公司 | Sleeve for repairing pipeline |
| CN112610797A (en) * | 2020-12-02 | 2021-04-06 | 西安石油大学 | Protection device and protection method for damage and fracture of gas transmission pipeline |
| CN213840041U (en) * | 2020-12-14 | 2021-07-30 | 沈阳圣凯龙输油管道技术服务有限责任公司 | B-type sleeve for repairing circumferential weld defects of oil and gas pipelines |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201217140Y (en) | Pipeline welding interfacing apparatus | |
| CN111745316A (en) | Rapid positioning and correcting method for butt joint of steel pipes | |
| CN104652422A (en) | Device and method for connecting reinforcing bars of pile foundation reinforcing cage | |
| CN108443619B (en) | Method for mounting expansion joint of pressure steel pipe bellows of hydropower station | |
| CN113894468A (en) | Clamp for bearing dislocation stress during electric melting pipeline welding and operation method thereof | |
| CN102922194B (en) | Large-aperture pipe circular seam line-up clamp and large-aperture pipe circular seam line-up clamping method | |
| CN215172971U (en) | Fiber reinforced composite pipe internal expansion integrated joint for coal mine | |
| CN207229029U (en) | The auxiliary line fixing hoop of Offshore Drilling Riser | |
| CN114909542A (en) | Oil and gas pipeline defect repairing device and method | |
| CN108871941B (en) | Pressure test tool for pipe fitting | |
| CN217153492U (en) | Spherical sleeve device for repairing and reinforcing pipeline defects | |
| CN111001976A (en) | Opening aligning device for large-diameter thin-wall pipeline and using method thereof | |
| CN111765313A (en) | Steel 90-degree r-shaped tee joint | |
| CN213318665U (en) | Quick positioning and correcting device for butt joint of steel pipe | |
| CN114393361A (en) | Be applied to group of water conservancy water and electricity penstock field welding process to platform truck | |
| CN201680113U (en) | Metal coated compensator | |
| CN210549267U (en) | Pipeline connector | |
| CN210219001U (en) | Steel 90-degree r-shaped tee joint | |
| RU114744U1 (en) | CUTTING TEE WITH PIPE REINFORCING FOR PIPELINES | |
| CN212480415U (en) | Turn-ups withhold pipe joint for connecting nonmetal composite continuous pipe | |
| CN217232972U (en) | Angle steel reinforcing apparatus | |
| CN215294003U (en) | Exempt from to weld special type oil transportation pipeline connection structure | |
| CN211599777U (en) | High-frequency welded steel pipe | |
| CN201891980U (en) | Copying pipe fitting | |
| CN214699560U (en) | Internal reinforcing structure of steel pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |