CN110748742A - Online repair technology for inserted pipeline in RTP pipe - Google Patents
Online repair technology for inserted pipeline in RTP pipe Download PDFInfo
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- CN110748742A CN110748742A CN201910951633.3A CN201910951633A CN110748742A CN 110748742 A CN110748742 A CN 110748742A CN 201910951633 A CN201910951633 A CN 201910951633A CN 110748742 A CN110748742 A CN 110748742A
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- pipeline
- repaired
- pipe
- rtp
- rtp pipe
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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
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
-
- 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
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/30—Constructional aspects of the propulsion means, e.g. towed by cables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- 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
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/10—Treating the inside of pipes
-
- 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
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/10—Treating the inside of pipes
- F16L2101/12—Cleaning
-
- 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
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/60—Stopping leaks
Abstract
The invention relates to the technical field of pipeline repair, and discloses an online repair technology for an inserted pipeline in an RTP (real time transport protocol) pipe, which comprises the following steps: the method comprises the steps of firstly, adopting an optical fiber sensor to perform leakage detection and marking on a pipeline to be repaired, secondly, selecting a typical pipeline section to perform trial insertion to obtain first hand data, then finding out a mechanical weak point in the insertion process by utilizing finite element analysis, thirdly, surveying the field condition, determining the insertion length and insertion tension of each section of pipeline, fourthly, respectively excavating operation pits at two ends of the pipeline to be repaired, piling a supporting soil plate, and draining water according to the actual condition. The RTP pipe inner interpenetration pipeline online repair technology has the advantages of no damage to hardened pavements and buildings, high construction speed, good conveying capacity, strong internal pressure resistance, good corrosion resistance, wide application range, long service life and the like by adopting the RTP pipe to repair the oilfield conveying pipeline, and improves the application prospect of the oilfield conveying industry.
Description
Technical Field
The invention relates to the technical field of pipeline repair, in particular to an online repair technology for an inserted pipeline in an RTP (real time transport protocol) pipe.
Background
The Reinforced Thermoplastic composite Pipe (RTP) is a high-pressure plastic composite Pipe, and is formed from three-layer structure, its internal layer and external layer are made up by using high-density polyethylene PE80 material, its intermediate layer is a Reinforced band made up by using Reinforced material, and the Reinforced material is aramid fibre, so that it is applicable to various corrosive media of water fluid, hydrocarbon and natural gas, etc. and various corrosive environments.
The main land oil field in China has been developed for a long time, a lot of originally laid pipelines will also reach the service life, and along with the enlargement of the scale of urban construction, a lot of originally laid pipelines are placed in the central area of cities and towns nowadays, the pipeline corrosion leakage condition is serious, and great potential safety hazards exist. If the updating is dismantled, the cost is high, and the method is neither economical nor practical; if the partial replacement is performed, there are the following limiting factors: firstly, underground pipe networks are dense and staggered with each other, the structure is complex, the geographical position is narrow, and the replacement is difficult; secondly, if the conventional excavation repair is carried out, the hardened pavement and the surface building can be damaged, and the cost is high; thirdly, if the large-area excavation is carried out, the traffic is affected, and the normal life of residents is hindered, so that the online repairing technology for inserting the pipeline in the RTP pipe is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an online repair technology for inserting pipelines in an RTP pipe, which has the advantages of no damage to hardened pavements and buildings, high construction speed, good conveying capacity, strong internal pressure resistance, good corrosion resistance, wide application range, long service life and the like, and solves the problems in the background art.
(II) technical scheme
In order to achieve the purposes of no damage to hardened pavements and buildings, high construction speed, good conveying capacity, strong internal pressure resistance, good corrosion resistance, wide application range and long service life, the invention provides the following technical scheme: the RTP pipe inner inserting pipeline on-line repairing technology includes the following steps:
the method comprises the following steps that firstly, an optical fiber sensor is adopted to perform leakage detection and marking on a pipeline to be repaired;
selecting a typical pipeline section for trial insertion to obtain first-hand data, and then finding out a mechanical weak point in the insertion process by utilizing finite element analysis;
thirdly, surveying the field situation, and determining the penetration length and penetration tension of each section of pipeline;
respectively excavating operation pits at two ends of the pre-repaired pipeline, piling supporting soil plates, and draining water according to actual conditions;
after cutting off the pipeline, detecting and threading the pipeline to be repaired by using a detection robot, and detecting the line direction, bypass and sediment in the original pipeline;
step six, performing segmented cleaning, path diameter passing and tumor removal on the inner pipeline of the pre-repaired pipeline;
seventhly, performing an insertion test on the pre-repaired pipeline by using the PE pipe, and observing scratches of a test section and the change condition of traction force in the insertion process;
step eight, inserting the RTP pipe into the pre-repaired pipeline by using an unreeling machine and a tractor, and pressing and expanding the RTP pipe by using a pressing machine to enable the RTP pipe to be attached to the inner side wall of the pre-repaired pipeline;
and step nine, performing closed joint treatment on the multi-section repaired pipeline.
Preferably, in the first step, the optical fiber sensor is a distributed optical fiber sensor.
Preferably, the typical pipeline section in the second step is a pipeline section which is seriously worn and has an elbow and reducer pipeline structure.
Preferably, the size of the operation pits in the fourth step is set to be 6m × 4m × 3 m.
Preferably, when the pipeline is cleaned in sections, the diameter is reduced and the tumors are removed in the step six, plastic cloth is paved in each operation pit, and an oil receiving groove is placed in each operation pit.
Preferably, the length of the PE pipe in step seven is set to 3 m.
Preferably, the traction speed of the middle tractor in the step eight is 4 m/min-15 m/min, and the traction force of the tractor is less than 50% of the yield strength of the RTP pipe.
Preferably, in the step six, the pipeline is cleaned in a segmented mode, the diameter is cleared, and the burrs are removed, high-pressure water jet and PTG physical cleaning equipment are adopted, a traction diameter gauge is adopted for removing the burrs in a segmented mode, impact scraping is conducted on the burrs, and the attachments on the wall of the pipeline are scraped and cleaned through a combined steel wire disc brush.
(III) advantageous effects
Compared with the prior art, the invention provides an online repair technology for an inserted pipeline in an RTP pipe, and the online repair technology has the following beneficial effects:
the RTP pipe inner interpenetration pipeline online repair technology has the advantages of no damage to hardened pavements and buildings, high construction speed, good conveying capacity, strong internal pressure resistance, good corrosion resistance, wide application range, long service life and the like by adopting the RTP pipe to repair the oilfield conveying pipeline, and improves the application prospect of the oilfield conveying industry.
Drawings
FIG. 1 is a schematic diagram of a stage of an RTP pipe inner penetration pipeline on-line repairing technology according to the present invention;
fig. 2 is a process flow chart of the on-line repairing technology for the inserted pipeline in the RTP tube provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the on-line repairing technique for the inserted pipe in the RTP pipe includes the following steps:
the method comprises the following steps that firstly, an optical fiber sensor is adopted to perform leakage detection and marking on a pipeline to be repaired;
selecting a typical pipeline section for trial insertion to obtain first-hand data, and then finding out a mechanical weak point in the insertion process by utilizing finite element analysis;
thirdly, surveying the field situation, and determining the penetration length and penetration tension of each section of pipeline;
respectively excavating operation pits at two ends of the pre-repaired pipeline, piling supporting soil plates, and draining water according to actual conditions;
after cutting off the pipeline, detecting and threading the pipeline to be repaired by using a detection robot, and detecting the line direction, bypass and sediment in the original pipeline;
step six, performing segmented cleaning, path diameter passing and tumor removal on the inner pipeline of the pre-repaired pipeline;
seventhly, performing an insertion test on the pre-repaired pipeline by using the PE pipe, and observing scratches of a test section and the change condition of traction force in the insertion process;
step eight, inserting the RTP pipe into the pre-repaired pipeline by using an unreeling machine and a tractor, and pressing and expanding the RTP pipe by using a pressing machine to enable the RTP pipe to be attached to the inner side wall of the pre-repaired pipeline;
and step nine, performing closed joint treatment on the multi-section repaired pipeline.
In the first step, the optical fiber sensor is a distributed optical fiber sensor, the temperature and the strain around the pipeline are checked, whether a leakage event occurs is further judged, the leakage with the flow rate larger than 0.01% of the total flow rate of the pipeline can be detected, the measurement time is less than 10min, the single host can provide the ultra-long detection distance exceeding 40km, the positioning precision can reach +/-20 m, and the temperature measurement precision can reach +/-1 ℃.
And in the second step, the typical pipeline section is a pipeline section which is seriously worn and has an elbow and reducer pipeline structure.
The size of the operation pit in the fourth step is 6m multiplied by 4m multiplied by 3m, so that people can conveniently install a protection device, a traction machine, an unreeling machine and a pressing machine in the operation pit.
And step six, when the pipeline is cleaned in sections, the diameter is reduced and the burrs are removed, plastic cloth is laid in each operation pit, an oil receiving groove is arranged, after the pipeline is cleaned, cleaned oil stains are discharged from the interior of the pipeline, the oil stains can be intensively arranged in an oil stain machine case through the oil receiving groove, and the oil stains can be conveniently treated subsequently.
And the length of the PE pipe in the seventh step is 3m, so that the cleaning effect inside the pipeline can be conveniently detected.
And step eight, the traction speed of the traction machine is 8m/min, and the traction force of the traction machine is less than 50% of the yield strength of the RTP pipe, so that the pipeline and the RTP pipe are prevented from being damaged due to the fact that the traction machine is too high in speed and over traction force.
In the sixth step, the pipeline is cleaned in sections, the diameter and the tumor are cleared, high-pressure water jet and PTG physical cleaning equipment are adopted, the traction diameter gauge is adopted to carry out sectional tumor removal, impact scraping is carried out on the tumor, and the wall attachments of the pipeline are scraped and cleaned by using a combined steel wire disc brush, so that the interior of the pipeline can be cleaned, the diameter gauge consists of two steel wire brushes and two steel plates, the steel plate is a 10-16mm steel plate, the outer diameter of the steel plate is slightly smaller than the inner diameter of the steel pipe, because enough space is available in a construction site, when the diameter gauge is passed through the diameter gauge, a steel wire rope on a winch is required to be released according to the length of the pipe section required to be repaired, the two sides are kept in communication smoothness during traction, if the steel wire rope laid on the ground by the winch is found to be motionless, the operator is immediately informed, the traction is stopped, the steel wire rope, the traction should be stopped immediately, the detection robot is used for detecting and positioning from the inlet end of the winch, the point is dug out if necessary, and whether the point has screw repaired mouth or other foreign bodies is checked. In the whole process of passing through the drift diameter device, two sides must be communicated smoothly, and constructors cannot be allowed to enter or approach a steel wire rope paved on the ground, particularly under the condition that the steel wire rope is not moved.
In summary, the RTP in-pipe insertion pipeline on-line repairing technology includes detecting leakage of a pipeline to be repaired by an optical fiber sensor, marking the pipeline, selecting a typical pipeline section for trial insertion to obtain first hand data, finding out mechanical weak points in the insertion process by finite element analysis, investigating the field condition, determining the insertion length and insertion tension of each section of pipeline, respectively excavating operation pits at two ends of the pipeline to be repaired, piling a supporting soil plate, draining water according to the actual condition, detecting and threading the pipeline to be repaired by a detection robot after cutting the pipeline, detecting the pipeline trend, bypass and sediment in the original pipeline, cleaning the pipeline inside the pipeline to be repaired in sections, removing the diameter and the tumor, performing insertion test on the pipeline to be repaired by a PE pipe, and observing the scratch of the test section and the change condition of traction force in the insertion process, and (3) inserting the RTP pipe into the pre-repaired pipeline by using an unreeling machine and a tractor, and pressing and expanding the RTP pipe by using a pressing machine to ensure that the RTP pipe is attached to the inner side wall of the pre-repaired pipeline, and performing closed joint treatment on the multi-section repaired pipeline to finish pipeline repair.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
- The RTP pipe inner interpenetration pipeline on-line repair technology is characterized in that: the method comprises the following steps:the method comprises the following steps that firstly, an optical fiber sensor is adopted to perform leakage detection and marking on a pipeline to be repaired;selecting a typical pipeline section for trial insertion to obtain first-hand data, and then finding out a mechanical weak point in the insertion process by utilizing finite element analysis;thirdly, surveying the field situation, and determining the penetration length and penetration tension of each section of pipeline;respectively excavating operation pits at two ends of the pre-repaired pipeline, piling supporting soil plates, and draining water according to actual conditions;after cutting off the pipeline, detecting and threading the pipeline to be repaired by using a detection robot, and detecting the line direction, bypass and sediment in the original pipeline;step six, performing segmented cleaning, path diameter passing and tumor removal on the inner pipeline of the pre-repaired pipeline;seventhly, performing an insertion test on the pre-repaired pipeline by using the PE pipe, and observing scratches of a test section and the change condition of traction force in the insertion process;step eight, inserting the RTP pipe into the pre-repaired pipeline by using an unreeling machine and a tractor, and pressing and expanding the RTP pipe by using a pressing machine to enable the RTP pipe to be attached to the inner side wall of the pre-repaired pipeline;and step nine, performing closed joint treatment on the multi-section repaired pipeline.
- 2. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: in the first step, the optical fiber sensor is a distributed optical fiber sensor.
- 3. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: and in the second step, the typical pipeline section is a pipeline section which is seriously worn and has an elbow and reducer pipeline structure.
- 4. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: the size of the operation pits in the fourth step is set to be 6m multiplied by 4m multiplied by 3 m.
- 5. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: and step six, paving plastic cloth in each operation pit and placing an oil receiving groove when the pipeline is cleaned in sections, and is subjected to diameter passing and tumor removal.
- 6. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: and step seven, setting the length of the PE pipe to be 3 m.
- 7. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: and eighthly, the traction speed of the middle tractor is 4-15 m/min, and the traction force of the tractor is less than 50% of the yield strength of the RTP pipe.
- 8. The on-line repair technique for the inserted pipeline in the RTP pipe as recited in claim 1, wherein: and step six, cleaning the pipeline in sections, dredging the diameter and removing the burrs, adopting high-pressure water jet and PTG physical cleaning equipment, adopting a traction drifter to remove the burrs in sections, carrying out impact scraping on the burrs, and scraping and cleaning the attachments on the wall of the pipeline by using a combined steel wire disc brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951633.3A CN110748742A (en) | 2019-10-09 | 2019-10-09 | Online repair technology for inserted pipeline in RTP pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951633.3A CN110748742A (en) | 2019-10-09 | 2019-10-09 | Online repair technology for inserted pipeline in RTP pipe |
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| CN110748742A true CN110748742A (en) | 2020-02-04 |
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| CN201910951633.3A Pending CN110748742A (en) | 2019-10-09 | 2019-10-09 | Online repair technology for inserted pipeline in RTP pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853349A (en) * | 2020-07-27 | 2020-10-30 | 深圳市市政工程总公司 | Construction method for penetrating long-distance curve steel pipe into pipe |
| CN111928015A (en) * | 2020-07-21 | 2020-11-13 | 中国化学工程第七建设有限公司 | Pipeline dismantling and installing construction method in narrow space |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928015A (en) * | 2020-07-21 | 2020-11-13 | 中国化学工程第七建设有限公司 | Pipeline dismantling and installing construction method in narrow space |
| CN111928015B (en) * | 2020-07-21 | 2021-09-07 | 中国化学工程第七建设有限公司 | Pipeline dismantling and installing construction method in narrow space |
| CN111853349A (en) * | 2020-07-27 | 2020-10-30 | 深圳市市政工程总公司 | Construction method for penetrating long-distance curve steel pipe into pipe |
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Application publication date: 20200204 |