CN106925577B - Method for cleaning residues of waste oil and gas pipelines - Google Patents
Method for cleaning residues of waste oil and gas pipelines Download PDFInfo
- Publication number
- CN106925577B CN106925577B CN201511032027.XA CN201511032027A CN106925577B CN 106925577 B CN106925577 B CN 106925577B CN 201511032027 A CN201511032027 A CN 201511032027A CN 106925577 B CN106925577 B CN 106925577B
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- pipe
- ball collecting
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- 238000004140 cleaning Methods 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002699 waste material Substances 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 82
- 239000000243 solution Substances 0.000 claims description 63
- 239000007789 gas Substances 0.000 claims description 48
- 238000002347 injection Methods 0.000 claims description 44
- 239000007924 injection Substances 0.000 claims description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims description 43
- 238000011010 flushing procedure Methods 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 17
- 239000010985 leather Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- IXHBTMCLRNMKHZ-LBPRGKRZSA-N levobunolol Chemical compound O=C1CCCC2=C1C=CC=C2OC[C@@H](O)CNC(C)(C)C IXHBTMCLRNMKHZ-LBPRGKRZSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000011120 smear test Methods 0.000 description 1
Classifications
-
- 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
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a method for cleaning residues of a waste oil-gas pipeline, and belongs to the field of cleaning of oil-gas pipelines. According to the method, the configuration of a corresponding cleaning system is determined according to residues in the pipeline by investigating the current situation of the pipeline to be cleaned; the temporary ball distributing cylinder and the temporary ball collecting cylinder are respectively arranged at the two ends of the pipeline, so that the cleaning requirements of waste pipelines under different conditions can be met, the structures of the temporary ball distributing cylinder and the temporary ball collecting cylinder are simple, the processing and the field application are convenient, the cleaned waste liquid can be accurately recovered at a fixed point, the field construction is convenient, the cleaning system is sent into the pipeline from the ball distributing cylinder for cleaning operation, then the cleaning system is recovered from the ball collecting cylinder, a blind plate does not need to be opened and closed frequently, and the operation safety is ensured, so that the working efficiency is also greatly improved; and finally, recovering the pipeline, and inspecting the cleaning effect of the pipeline, so that the residues in the waste oil and gas pipe are cleaned, and the residues in the waste pipeline are prevented from being diffused into surrounding soil and water to cause environmental pollution.
Description
Technical field
The present invention relates to oil-gas pipelines to clean field, in particular to a kind of discarded oil-gas pipeline residue cleaning method.
Background technique
Oil-gas pipeline it is discarded be pipeline lifecycle management an important link, pipeline Years Of Service reaches the upper limit
Or continuing to convey the benefit of oil gas far below conveying cost and when pipeline is without other potential uses, discarded use is can not to keep away
The selection exempted from.It is embedded in the discarded pipe of underground for a long time, it is eventually comprehensively rotten due to the missing of cathodic protection, routine testing measure
It loses and collapses.Environment is polluted in order to avoid the residue in discarded pipe is diffused into surrounding soil and water body, residue
Cleaning it is most important.
No matter the pipeline after cleaning is taken dismounting mode discarded or discarded on the spot, positive effect is all had.However, useless
The cleaning in pipe abandon road, different from the physical cleaning of in-service pipeline, because many discarded pipelines are due to many years stopping transportation, original yard
Facility (such as pump, receiving ball tube) possibly can not utilize or even integrated piping has been segmented into multiple independent pipeline sections, cleaning
Difficulty of construction is bigger, therefore, lacks be directed to abandoned oil pipe residue cleaning method at present.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
Currently, the prior art, which lacks, is directed to abandoned oil pipe residue cleaning method, it be easy to cause in discarded pipe
Residue be diffused into surrounding soil and water body and cause environmental pollution.
Summary of the invention
In order to solve the problems, such as that the prior art lacks for abandoned oil pipe residue cleaning method, the present invention is implemented
Example provides a kind of discarded oil-gas pipeline residue cleaning method, and the discarded oil-gas pipeline residue cleaning method includes:
Step 1, pipeline status to be cleaned is investigated；
Step 2, according to residue in the pipeline, the configuration of corresponding cleaning system is determined；
Step 3, service cylinder and ball collecting chamber are installed respectively in the pipe ends；
Step 4, the cleaning system is sent in the pipeline from service cylinder and carries out washing and cleaning operation；
Step 5, the cleaning system is recycled from the ball collecting chamber；
Step 6, recovery processing is carried out to the pipeline, and examines the cleaning effect of the pipeline.
Specifically, the step 1, specifically includes:
The design and operation maintenance data for consulting pipeline obtain the wall thickness, bore, bearing capacity, conveying Jie of the pipeline
Matter situation, pipeline purging or pigging situation relevant information judge whether the cleaning system can be by the pipeline.
Further, the cleaning system includes at least two pipe cleaner groups, and the outer peripheral edge of each pipe cleaner group is and institute
The inner wall for stating pipeline is affixed, and cleaning solution is provided between every two adjacent pipe cleaner group, and each pipe cleaner group includes being affixed
At least one pipe cleaner.
Specifically, the step 2, specifically includes:
On the pipeline, pipe sampling of breaking analyzes the thickness and ingredient of residues inside, determines and constitute cleaning system
The pipe cleaner type and cleaning solution type and cleaning solution dosage of system.
Further, the step 3, specifically includes:
Service cylinder and ball collecting chamber is respectively welded in the pipe ends；
Pressure gauge is installed on the service cylinder, and injecting hole is set；
Mudhole and gas vent are set on the ball collecting chamber, and the length of the ball collecting chamber is more than or equal to the cleaning
The total length of all pipe cleaners in system；
In the pipe end setting liquid injection hole and porus excretorius close to service cylinder, the junction of the service cylinder and pipeline to institute
The distance for stating liquid injection hole, greater than the length of longest pipe cleaner group in the cleaning system, and the liquid injection hole is located at the excretion
Between hole and the service cylinder；
Drainage hole is set in the pipe end close to ball collecting chamber, the junction of the ball collecting chamber and pipeline to the drainage hole
Distance, greater than the length of the longest pipe cleaner group in the cleaning system；
Indicator is set on pipeline between the drainage hole and the ball collecting chamber.
Further, the step 4, specifically includes:
Step 41, the cleaning system includes two pipe cleaner groups, opens the gas vent on the ball collecting chamber, normal in pipeline
In the case where pressure, the blind plate of service cylinder is opened, the first pipe cleaner group in cleaning system is pushed to the size of the service cylinder
At head；
Step 42, blind plate, porus excretorius and the liquid injection hole for closing service cylinder inject nitrogen by injecting hole and push the first pigging
Device group is run to the direction of ball collecting chamber, and the length of the cleaning solution set between the first pipe cleaner group and the second adjacent pipe cleaner group
Degree is greater than the distance that the nitrogen pushes the operation of the first pipe cleaner group；
Step 43, it closes injecting hole and stops nitrogen injection, opening porus excretorius makes to serve a ball cylinder pressure to normal pressure, opens service cylinder
Second pipe cleaner group is pushed at the concentric reducer of the service cylinder, closes the blind plate of service cylinder by blind plate；
Step 44, cleaning solution is filled by liquid injection hole, until porus excretorius has a cleaning solution spilling, closes porus excretorius, continue by
The remainder filling of the cleaning solution of setting finishes, and closes liquid injection hole；
Step 45, injecting nitrogen by injecting hole pushes the second pipe cleaner group to run to the direction of ball collecting chamber, until described
Cleaning system fully enters pipeline, opens injecting hole injecting compressed air and cleaning system is pushed to carry out cleaning work in the pipeline
Industry.
Further, the nitrogen in step 42 pushes the distance of the first pipe cleaner group operation, is according to nitrogen
Service life obtains, service life t=(P2 × V2)/(Q × P1) of the nitrogen；
Wherein, the pressure in P1- source nitrogen exit, Q- nitrogen flow, the numerical value of P2- service cylinder pressure gauge, V2- first are clear
Pipe device group sets the corresponding piping volume of range ability.
Further, the step 5, specifically includes:
Step 51, during carrying out washing and cleaning operation in the pipeline in cleaning system, gas vent and mudhole are opened,
Gas vent is closed when residue starts and is discharged from mudhole in pipeline；
Step 52, it after indicator indicates that the first pipe cleaner group passes through completely, closes mudhole and stops blowdown；
Step 53, it opens the reception that drainage hole carries out cleaning solution and closes drainage hole after cleaning solution receives, the row of opening
Blowdown is continued in dirty hole, after indicator indicates that the second pipe cleaner group passes through completely, closes mudhole and stops blowdown；
Step 54, the pipe cleaner in the cleaning system is made to fully enter ball collecting chamber；
Step 55, it closes injecting hole and stops compressed air injection, open simultaneously porus excretorius and gas vent, extremely by pipeline pressure release
Normal pressure, and the blind plate of ball collecting chamber is opened, recycle pipe cleaner.
Specifically, the step 6, specifically includes:
Indicator is removed, ball collecting chamber and service cylinder are cut back；
By visual observation, wiping or disconnected pipe check pipeline residues inside inside pipeline, and carry out to received cleaning solution
Pollutant concentration test, and evaluate the effect after pipeline cleaning.
Preferably, the cleaning solution is aqua type cleaning solution and/or flushing water.
Technical solution provided in an embodiment of the present invention has the benefit that
Pipeline status to be cleaned determines corresponding cleaning system according to residue in pipeline to the present invention by inquiry
Configuration, and service cylinder and ball collecting chamber are installed respectively in pipe ends, cleaning system is sent in pipeline from service cylinder and is carried out
Then washing and cleaning operation recycles the cleaning system from ball collecting chamber, finally carries out recovery processing to pipeline, and examine the clear of pipeline
Effect is washed, realizes the cleaning to abandoned oil pipe residue, the residue in discarded pipe is avoided and is diffused into surrounding
Environmental pollution is caused in soil and water body；The method of the present invention is simple, easy to operate, practical.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of flow diagram of discarded oil-gas pipeline residue cleaning method provided in an embodiment of the present invention；
Fig. 2 is the connection schematic diagram of serve a ball cylinder, ball collecting chamber and pipeline that further embodiment of this invention provides；
Fig. 3 is the cleaning system structural schematic diagram that further embodiment of this invention provides；
Wherein, 1 blind plate, 2 injecting holes, 3 pressure gauges, 4 service cylinders, 5 liquid injection holes, 6 porus excretoriuses, 7 pipelines, 8 drainage holes, 9 refer to
Show device, 10 ball collecting chambers, 11 gas vents, 12 mudholes, 13 pipe cleaner groups, 14 cleaning solutions, 15 residues.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in Figure 1, the present invention provides a kind of discarded oil-gas pipeline residue cleaning method, the discarded oil-gas pipeline
Residue cleaning method includes:
Step 1,7 status of pipeline to be cleaned is investigated；
Step 2, according to residue 15 in the pipeline 7, the configuration of corresponding cleaning system is determined；
Step 3, service cylinder 4 and ball collecting chamber 10 are installed respectively at 7 both ends of pipeline；
Step 4, the cleaning system is sent in the pipeline 7 from service cylinder 4 and carries out washing and cleaning operation；
Step 5, the cleaning system is recycled from the ball collecting chamber 10；
Step 6, recovery processing is carried out to the pipeline 7, and examines the cleaning effect of the pipeline 7.
7 status of pipeline to be cleaned according to residue 15 in pipeline 7 determines corresponding cleaning system to the present invention by inquiry
The configuration of system；And the present invention does not depend on the pump and receiving ball tube facility of original pipe-line system, installs respectively temporarily at 7 both ends of pipeline
Service cylinder 4 and ball collecting chamber 10, can meet different situations discarded pipe 7 clean needs, interim service cylinder 4 and ball collecting chamber 10
Structure is simple, easy to process and field application, and the waste liquid adjustable point after cleaning accurately recycles, and site operation is convenient；
As shown in Figure 1, also can be found in Fig. 2, cleaning system is sent in pipeline 7 from service cylinder 4 and carries out washing and cleaning operation,
Then from recovery and rinsing system from ball collecting chamber 10, and cleaning system overall time recycles, and does not need frequently to be opened and closed blind plate 1, protects
Card operational safety also greatly improves working efficiency；Recovery processing finally is carried out to pipeline 7, and examines the cleaning effect of pipeline 7,
It realizes the cleaning to abandoned oil pipe residue 15, avoids the residue 15 in discarded pipe 7 and be diffused into soil around
Environmental pollution is caused in earth and water body；The method of the present invention is simple, practical, easy to operate.
Further, step 1, it specifically includes: consulting the design and operation maintenance data of pipeline 7, obtain the pipeline 7
Whether wall thickness, bore, bearing capacity, pumped (conveying) medium situation, pipeline purging or pigging situation relevant information, judge the cleaning system
It can be by the pipeline 7, to judge specific segmentation situation when the logical ball ability of pipeline 7 and residue 15 are cleaned.
Specifically, as shown in Fig. 2, also can be found in Fig. 3, cleaning system includes at least two pipe cleaner groups 13, each pigging
Inner wall of the outer peripheral edge of device group 13 with the pipeline 7 is affixed, and is provided with cleaning between every two adjacent pipe cleaner group 13
Liquid 14, each pipe cleaner group 13 include at least one pipe cleaner being affixed.Wherein, pipe cleaner group 13 primarily serves sealing and cleaning
Scraping action, pipe cleaner group 13 include that a pipe cleaner being affixed or multiple pipe cleaners, pipe cleaner can be straight panel pipe cleaner,
It is also possible to leather cup pipe cleaner, the quantity of the quantity of pipe cleaner group 13 and the pipe cleaner in each pipe cleaner group 13, and entirety
Length flexible setting, cleaning solution 14 can primarily serve the effect of dissolution and flushing according to the actual situation, and cleaning solution 14 can be
Simple aqua type cleaning solution is also possible to the combination of the aqua type cleaning solution and clear water that respectively independently use, to cleaning system
Be constructed without limitation, allow several monomer pipe cleaners or pipe cleaner group 13 and one section of cleaning solution 14 or multistage cleaning solution 14
Cleaning system is formed, to meet the cleaning demand of different type residue 15.
Further, step 2, it specifically includes: on the pipeline 7, choosing the disconnected pipe of proper site and be sampled, to inside
The thickness and main component of residue 15 are analyzed, and determine 14 type of pipe cleaner type and cleaning solution for constituting cleaning system,
And 14 dosage of cleaning solution.
Further, step 3, it specifically includes:
As shown in Fig. 2, service cylinder 4 and ball collecting chamber 10 is respectively welded at 7 both ends of pipeline, wherein the service setting of cylinder 4 exists
At the high location point of pipeline 7, it is more advantageous to the operation of washing and cleaning operation；In embodiments of the present invention, it is carrying out service cylinder 4 and is receiving ball
Before 10 welding of cylinder, construction site preparation is first carried out, is specifically included: determined the installation site of ball collecting chamber 10 and cylinder 4 of serving a ball, carry out
7 operating pit of pipeline excavates, and opens up storage of the beta site for vehicle and equipment, the setting of place warning line；
As shown in Fig. 2, installing pressure gauge 3 on the service cylinder 4, the pressure in pipeline 7 is monitored by pressure gauge 3, and
Injecting hole 2 is set, wherein injecting hole 2 is used for the injection of gas, valve is installed on injecting hole 2, for controlling the note of gas
Enter；
As shown in Fig. 2, mudhole 12 and gas vent 11 are arranged on the ball collecting chamber 10, and the length of the ball collecting chamber 10
More than or equal to the total length of all pipe cleaners in the cleaning system, so that the length of ball collecting chamber 10 is large enough to hold all piggings
Device, wherein valve is installed on mudhole 12 and gas vent 11, there are many implementations of valve, can be gate valve, is also possible to
Ball valve.
As shown in Fig. 2, in 7 end of the pipeline setting liquid injection hole 5 and porus excretorius 6 close to service cylinder 4, the service cylinder 4 and
The junction of pipeline 7 to the liquid injection hole 5 distance, greater than the length of longest pipe cleaner group 13 in the cleaning system, and institute
Liquid injection hole 5 is stated between the porus excretorius 6 and the service cylinder 4；Wherein, in the present embodiment, porus excretorius 6 is mainly used for gas
With the discharge of liquid, the position in close proximity to liquid injection hole 5 and separate service cylinder 4 is set, and respectively on liquid injection hole 5 and porus excretorius 6
Valve is installed；
As shown in Fig. 2, drainage hole 8, the ball collecting chamber 10 and pipeline 7 is arranged in 7 end of pipeline close to ball collecting chamber 10
Junction to the drainage hole 8 distance, greater than the length of the longest pipe cleaner group 13 in the cleaning system, so set,
The waste liquid after cleaning in pipeline 7 is aloowed all to be discharged, wherein valve is installed on drainage hole 8；
As shown in Fig. 2, indicator 9 is arranged on pipeline 7 between the drainage hole 8 and the ball collecting chamber 10；Wherein, refer to
Show device 9 for monitoring whether cleaning system passes through, in the present embodiment, indicator 9 is arranged in drainage hole 8 close to 10 side of ball collecting chamber
Pipeline 7 on.
Preferably, as shown in Fig. 2, step 4, specifically includes:
In the embodiment of the present invention, the cleaning system includes step 41 two pipe cleaner groups 13 open the ball collecting chamber 10
On gas vent 11, in the case where 7 normal pressure of pipeline, open service cylinder 4 blind plate 1, by the first pipe cleaner in cleaning system
Group 13 is pushed at the concentric reducer of the service cylinder 4；Wherein, in the present embodiment, by the steel pipe of certain length by the first pigging
Device group 13 is pushed at the concentric reducer of service cylinder 4；
Step 42, blind plate 1, porus excretorius 6 and the liquid injection hole 5 for closing service cylinder 4 inject nitrogen by injecting hole 2 and push the
One pipe cleaner group 13 is run to the direction of ball collecting chamber 10, and is set between the first pipe cleaner group 13 and the second adjacent pipe cleaner group 13
The length of fixed cleaning solution is greater than the distance that the nitrogen pushes the operation of the first pipe cleaner group 13, so set, guaranteeing cleaning solution
14 can full packages filling, do not interspace at the top of pipeline 7；
Step 43, it closes injecting hole 2 and stops nitrogen injection, opening porus excretorius 6 makes to serve a ball 4 pressure of cylinder to normal pressure, opens hair
Second pipe cleaner group 13 is pushed at the concentric reducer of the service cylinder 4, closes the blind plate 1 of service cylinder 4 by 4 blind plate 1 of ball cylinder；
Step 44, cleaning solution 14 is filled by liquid injection hole 5, until porus excretorius 6 has the spilling of cleaning solution 14, closes porus excretorius 6,
Continue to finish the remainder filling of the cleaning solution 14 of setting, and closes liquid injection hole 5；
Step 45, injecting nitrogen by injecting hole 2 pushes the second pipe cleaner group 13 to run to the direction of ball collecting chamber 10, until
The cleaning system fully enters pipeline 7, open 2 injecting compressed air of injecting hole push cleaning system in the pipeline 7 into
Row washing and cleaning operation.
Wherein, the first pipe cleaner group 13 and the second pipe cleaner group 13 include at least one pipe cleaner.If cleaning system
When including more than two pipe cleaner groups 13, implementation steps and including two pipe cleaner groups 13 as a same reason, foundation step 41-45,
It is sequentially pushed into next pipe cleaner group 13, until the pipe cleaner group 13 of cleaning system fully enters pipeline 7.
Further, the nitrogen in step 42 pushes the distance of the first pipe cleaner group 13 operation, is according to nitrogen
Service life obtain, service life t=(P2 × V2)/(Q × P1) of the nitrogen；
Wherein, the pressure in P1- source nitrogen exit, Q- nitrogen flow, the numerical value of P2- service 4 pressure gauge 3 of cylinder, V2- first
Pipe cleaner group 13 sets corresponding 7 volume of pipeline of range ability.
Wherein, the method that control nitrogen pushes 13 range ability of pipe cleaner group are as follows: by the pressure for measuring source nitrogen exit
The numerical value P2 of power P1 and nitrogen flow Q, 4 pressure gauge 3 of cylinder of serving a ball, and the range ability for calculating the setting of the first pipe cleaner group 13 is corresponding
7 volume V2 of pipeline, be based on The Ideal-Gas Equation, derive service life t=(P2 × V2)/(Q × P1) of nitrogen, lead to
The control nitrogen supply (NS) amount of nitrogen service life is crossed to realize the control of 13 range ability of pipe cleaner group.
Preferably, step 5, specifically includes:
Step 51, during carrying out washing and cleaning operation in the pipeline 7 in cleaning system, gas vent 11 and blowdown are opened
Gas vent 11 is closed when residue 15 starts and is discharged from mudhole 12 in pipeline 7 in hole 12；
Step 52, it after indicator 9 indicates that the first pipe cleaner group 13 passes through completely, closes mudhole 12 and stops blowdown；
Step 53, it opens the reception that drainage hole 8 carries out cleaning solution 14 and closes drainage hole 8 after cleaning solution 14 receives,
It opens mudhole 12 and continues blowdown, after indicator 9 indicates that the second pipe cleaner group 13 passes through completely, close mudhole 12 and stop row
It is dirty；
Step 54, the pipe cleaner in the cleaning system is made to fully enter ball collecting chamber 10；
Step 55, it closes injecting hole 2 and stops compressed air injection, porus excretorius 6 and gas vent 11 are opened simultaneously, by pipeline 7
Pressure release opens the blind plate 1 of ball collecting chamber 10 to normal pressure, all pipe cleaners in disposable recovery and rinsing system.
In the embodiment of the present invention, the cleaning system includes two pipe cleaner groups 13, if cleaning system includes more than two
A pipe cleaner group 13, implementation steps and when including two pipe cleaner groups 13 as a same reason, it is sequentially next according to step 51-53
Pipe cleaner group 13 is moved to 10 direction of ball collecting chamber, until the pipe cleaner group 13 of cleaning system fully enters pipeline 7.
Further, step 6, it specifically includes:
Indicator 9 is removed, ball collecting chamber 10 and service cylinder 4 are cut back；
By visual observation, wiping or the intermediate position of pipeline 7 excavate disconnected pipe and check 7 residues inside 15 of pipeline inside pipeline 7,
And pollutant concentration test is carried out to received cleaning solution 14, the effect after the cleaning of quantitative assessment pipeline 7.
Wherein, in the present embodiment, dismounting is connected to pipeline 7 and valve, indicator 9 on receiving ball tube 4, and cutting recycling is received
Service cylinder 4；Visual or 7 inside smear test of pipeline is carried out to 7 both ends of pipeline after cutting service cylinder 4, after verifying cleaning
Effect is excavated disconnected pipe to the intermediate position of pipeline 7 when necessary and is checked.Meanwhile to received cleaning solution 14 carry out scene or
Laboratory pollution object concentration determination, the effect after quantitative assessment cleaning.In the present embodiment, further includes site recovery, specifically includes:
One-shot job site recovery, excavates operating pit backfill, and surface vegetation restores.
Preferably, the cleaning solution is aqua type cleaning solution and/or flushing water.
The crude oil pipeline 7 that the embodiment of the present invention runs 40 years using one is illustrated as pipeline to be cleaned 7, discards oil gas
7 residue of pipeline, 15 cleaning method specifically includes:
It investigates 7 status of pipeline to be cleaned: consulting the design of pipeline 7 and operation maintenance data, it is thus understood that 7 wall thickness 8mm of pipeline,
Bore 720mm, the operating pressure before stopping transportation is 4Mpa, and Daqing crude oil was conveyed before 2007, conveys Russian oil after 2007,
Leather cup pipe cleaner is pushed to carry out oil extraction pipeline purging using nitrogen within 2014, stopping transportation seals waiting up for safekeeping and scraps disposition later.Whole pipeline
Due to relocating and breaking, pipe sampling has been segmented into multistage, according to information above, determines one section of the present embodiment cleaning for 2km's long
Pipeline 7 has the condition of logical cleaning system.
According to residue 15 in the pipeline 7, the configuration of corresponding cleaning system is determined: pipeline section Pipe Cutting sampling knot to be cleaned
Fruit shows that 7 inner wall of pipeline remains crude oil and wax, and average thickness 4-6mm, wherein wax is that hard celebrates oily wax, and oil is Daqing oil.Needle
To the residue 15, select aqua type cleaning solution 14, and carry out laboratory simulation test, specify host agent concentration ratio and
The proportion of antistatic additive and emulsifier, the cleaning system of use sequentially include the first pipe cleaner group 13, aqua type cleaning solution
14, the second pipe cleaner group 13, flushing water and third pipe cleaner group 13, wherein in the embodiment of the present invention, each pipe cleaner group 13 is adopted
With single pipe cleaner, i.e. the first pipe cleaner group 13 is single steel wire straight-plate of brush pipe cleaner, the second pipe cleaner group 13 and third
Pipe cleaner group 13 is single leather cup pipe cleaner, and the length of each pipe cleaner group 13 is 1.1m, the use of aqua type cleaning solution 14
Amount is 6t, and flushing water consumption is 8t.Wherein, steel wire straight-plate of brush pipe cleaner mainly clears up the remaining oil of inside pipe wall and wax, makes it
Thickness is reduced within 1mm, then is dissolved by aqua type cleaning solution 14, and last flushing water is rinsed the inner wall of pipeline 7, thus
Reach the state of oil-free no wax.Leather cup pipe cleaner mainly plays sealing and scraping, and each pipe cleaner magnitude of interference is caliber
3%.
Construction site prepares, and specifically includes: determining the installation site of service cylinder 4 and ball collecting chamber 10, carries out 7 operating pit of pipeline
It excavates, opens up storage of the beta site for vehicle and equipment, the setting of place warning line.
At 7 both ends of pipeline service cylinder 4 and ball collecting chamber 10 are installed respectively: welding service cylinder 4 at 7 both ends of pipeline to be cleaned
With ball collecting chamber 10, wherein service 4 bore 810mm of cylinder, docked by concentric reducer with pipeline 7, long 1.8m.
Pressure gauge 3 is installed on service cylinder 4；And the injecting hole 2 of bore 100mm is set, for nitrogen and compressed air
Injection, is equipped with valve on injecting hole 2, in the present embodiment, using gate valve；10 length 4m of ball collecting chamber can accommodate composition cleaning system
3 pipe cleaners of system, bore 810mm, ball collecting chamber 10 are docked by concentric reducer with pipeline 7.
The gas vent 11 of bore 50mm and the mudhole 12 of bore 300mm are provided on ball cylinder, gas vent 11 is equipped with valve
, in the present embodiment, using ball valve, mudhole 12 is connected by elbow and flange with valve.
In 7 end of the pipeline setting liquid injection hole 5 and porus excretorius 6 close to service cylinder 4, specifically include: in the pipeline of service cylinder 4
The liquid injection hole 5 of diameter 100mm and the porus excretorius 6 of diameter 50mm, liquid injection hole 5 to the junction of service cylinder 4 and pipeline are opened up on 7
Distance is 3m, greater than the length 1.1m of longest pipe cleaner group 13 in cleaning system, gate valve is installed on liquid injection hole 5, porus excretorius 6 is arranged
In close proximity to liquid injection hole 5 and the setting far from service cylinder 4, with liquid injection hole 5 at a distance of 300mm, mounting ball valve on porus excretorius 6.
Drainage hole 8 is set in 7 end of pipeline close to ball collecting chamber 10, is specifically included: the row of opening up on the pipeline 7 for receiving ball end
The junction of fluid apertures 8, and install gate valve, drainage hole 8 to ball collecting chamber 10 and pipeline is to for 3m, greater than the longest pigging of cleaning system
The length 1.1m of device group 13；Indicator 9 is set on the pipeline 7 of 10 side of ball collecting chamber in drainage hole 8, wherein indicator 9 is adopted
Pass through indicator 9 with mechanical tube cleaner.
The cleaning system is sent in the pipeline 7 from service cylinder 4 and carries out washing and cleaning operation, by each pipe cleaner group
13 pipe cleaner, cleaning solution 14 are put into pipeline 7, form cleaning system, and run with gas push cleaning system, specific packet
It includes:
The gas vent 11 on the ball collecting chamber 10 is opened, the pressure gauge 3 in the case where 7 normal pressure of pipeline, i.e., on service cylinder 4
Reading is 0, opens the blind plate 1 of service cylinder 4, and steel wire straight-plate of brush pipe cleaner is put into service cylinder 4, then passes through certain length
Steel pipe advances it at the concentric reducer of service cylinder 4；
The valve for closing the service blind plate 1 of cylinder 4, porus excretorius 6 and liquid injection hole 5, opens the valve of injecting hole 2, passes through gas injection
Hole 2 injects nitrogen and steel wire straight-plate of brush pipe cleaner is pushed to run 10m.It is 6t that aqua type cleaning solution 14 is used in the present embodiment, in pipe
About 15m long in road 7, steel wire straight-plate of brush pipe cleaner range ability are less than the length of aqua type cleaning solution 14, control strip wire brush
The service life that straight panel pipe cleaner runs 10m is 38 seconds, wherein source nitrogen outlet pressure is 0.5MPa, flow 0.005m3/
S, the pressure of service cylinder 4 is 0.025MPa when steel wire straight-plate of brush pipe cleaner is run, and 10m length tube capacity is 3.8m3, can be calculated
Service life is 38s, wherein service life is calculated by the following formula, t=(P2 × V2)/(Q × P1)；
Wherein, the pressure in P1- source nitrogen exit, Q- nitrogen flow, the numerical value of P2- service 4 pressure gauge 3 of cylinder, V2- strip
Wire brush straight panel pipe cleaner sets corresponding 7 volume of pipeline of range ability.
Close injecting hole 2 valve stop nitrogen injection, open porus excretorius 6 valve by serve a ball cylinder 4 pressure discharge to
The reading of pressure gauge 3 of normal pressure, i.e. service cylinder 4 is 0.The blind plate 1 for opening service cylinder 4, by the leather cup pigging of the second pipe cleaner group 13
Device is put at service 4 concentric reducer of cylinder, closes the blind plate 1 of service cylinder 4.
The valve of liquid injection hole 5 is opened, aqua type cleaning solution 14 is filled, until cleaning solution 14 is discharged in porus excretorius 6, is then shut off
The valve of porus excretorius 6 continues to finish the filling of remaining cleaning solution 14, finally closes the valve of liquid injection hole 5.
Opening 2 valve of injecting hole injection nitrogen pushes the leather cup pipe cleaner of the second pipe cleaner group 13 to run 15m；The present embodiment
Middle with flushing water is 8t, the about 20m long in pipeline 7, and the leather cup pipe cleaner range ability of the second pipe cleaner group 13 is less than flushing water
Length.The service life for controlling the leather cup pipe cleaner operation 15m of the second pipe cleaner group 13 is 70 seconds, wherein source nitrogen outlet pressure
Power is 0.5MPa, flow 0.005m3/ s, the pressure of service cylinder 4 is when the leather cup pipe cleaner of the second pipe cleaner group 13 is run
0.03MPa, 15m length tube capacity are 5.8m3, can be calculated service life is 69.5s.
Close injecting hole 2 valve stop nitrogen injection, open porus excretorius 6 valve by serve a ball cylinder 4 pressure discharge to
The reading of pressure gauge 3 of normal pressure, i.e. service cylinder 4 is 0.The blind plate 1 for opening service cylinder 4, by the leather cup pigging of third pipe cleaner group 13
Device is placed at the concentric reducer of service cylinder 4, closes the blind plate 1 of service cylinder 4.
The valve of liquid injection hole 5 is opened, filling flushing water to porus excretorius 6 is discharged water, is then shut off 6 valve of porus excretorius, continues
The filling of remaining water is finished, 5 valve of liquid injection hole is finally closed.
It opens 2 valve injecting compressed air of injecting hole and pushes cleaning system operation.
From recovery and rinsing system from ball collecting chamber 10, during cleaning system is run, 7 residue 15 of pipeline, cleaning solution 14 are carried out
Reception, finally carry out pipe cleaner recycling, specifically include:
During cleaning system carries out washing and cleaning operation in the pipeline 7, the gas vent 11 on ball collecting chamber 10 is opened
With the valve of mudhole 12, and carry out receive discharge sump oil preparation, when inside pipe wall it is remaining oil and wax start from mudhole 12
11 valve of gas vent is closed when a small amount of discharge.
After indicating that steel wire straight-plate of brush pipe cleaner passes through completely by indicator 9, closes 12 valve of mudhole and stop row
It is dirty.
The reception that 8 valve of drainage hole carries out aqua type cleaning solution 14 is opened, after cleaning solution 14 receives, closes drainage hole
8 valves, the valve for opening mudhole 12 continue oil extraction and wax, when the leather cup by the second pipe cleaner group 13 of instruction of indicator 9 is clear
After pipe device passes through, closes 12 valve of mudhole and stop blowdown.
The collection that 8 valve of drainage hole is rinsed water is opened, after flushing water excludes, 8 valve of drainage hole is closed, opens
12 valve of mudhole continues oil extraction and wax, until oil and wax are all discharged, whole pipe cleaners enter ball collecting chamber 10, closes mudhole
12 valves stop blowdown.
The valve for closing injecting hole 2 on service cylinder 4 stops compressed air injection, opens simultaneously the gas vent on ball collecting chamber 10
11 and the valve of the porus excretorius 6 on service end pipe road 7 pressure release is carried out to normal pressure to pipeline 7, i.e., the reading of pressure gauge 3 is 0；It opens and receives
The blind plate 1 of ball cylinder 10 recycles steel wire straight-plate of brush pipe cleaner, two leather cup pipe cleaners.
Recovery processing is carried out to the pipeline 7, and examines the cleaning effect of the pipeline 7, is specifically included:
It removes and is connected to pipeline 7, receiving ball tube 4 and valve on ball collecting chamber 10, clear by indicator 9 and conveying aqua type
The pipeline 7 of washing lotion 14 and flushing water, cutting recycling receiving ball tube 4；7 both ends of pipeline after cutting service cylinder 4 are visually examined
It looks into, the results showed that the oil-free no wax of tube wall.Meanwhile petroleum content concentration determination in laboratory is carried out to received flushing water, as a result
For 29mg/L, cleaning effect is good, and the pipeline 7 after cleaning can direct gas flame cuttiug.
Site recovery specifically includes: one-shot job site recovery, excavates operating pit backfill, and surface vegetation restores.
The present invention does not depend on the pump and receiving ball tube facility of original pipe-line system, and the discarded pipe that can meet different situations is clear
Needs are washed, ball collecting chamber and service barrel structure are simple, and easy to process and field application, the waste liquid adjustable point after cleaning accurately recycles,
Site operation is convenient, and multiple pipe cleaners disposably recycle, and does not need frequent open blind plate, operational safety and high-efficient, cleaning solution
With flushing water can full packages filling, do not interspace at the top of pipeline, to guarantee that inner wall of the pipe can clean comprehensively, cleaning process
It is practical, limitation is constructed without to cleaning system, allows several monomer pipe cleaners or pipe cleaner group (multiple continuous
Pipe cleaner) with one section of cleaning solution or multistage cleaning solution cleaning system is formed, to meet the cleaning need of different type residue
It asks.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of discarded oil-gas pipeline residue cleaning method, which is characterized in that the discarded oil-gas pipeline residue cleaning side
Method includes:
Step 1, pipeline status to be cleaned is investigated；
Step 2, according to residue in the pipeline, the configuration of corresponding cleaning system is determined；
Step 3, service cylinder is installed in the pipe ends respectively and ball collecting chamber, the step 3 specifically include:
Service cylinder and ball collecting chamber is respectively welded in the pipe ends；
Pressure gauge is installed on the service cylinder, and injecting hole is set；
Mudhole and gas vent are set on the ball collecting chamber, and the length of the ball collecting chamber is more than or equal in the cleaning system
The total length of all pipe cleaners；
In the pipe end setting liquid injection hole and porus excretorius close to service cylinder, the junction of the service cylinder and pipeline to the note
The distance of fluid apertures, greater than the length of longest pipe cleaner group in the cleaning system, and the liquid injection hole be located at the porus excretorius with
Between the service cylinder；
In the pipe end close to ball collecting chamber, drainage hole is set, the junction of the ball collecting chamber and pipeline to the drainage hole away from
From greater than the length of the longest pipe cleaner group in the cleaning system；
Indicator is set on pipeline between the drainage hole and the ball collecting chamber；
Step 4, the cleaning system is sent in the pipeline from service cylinder and carries out washing and cleaning operation, the cleaning system packet
At least two pipe cleaner groups are included, inner wall of the outer peripheral edge of each pipe cleaner group with the pipeline is affixed, and every two adjacent
Cleaning solution is provided between pipe cleaner group, each pipe cleaner group includes at least one pipe cleaner being affixed；
The step 4, specifically includes:
Step 41, the cleaning system includes two pipe cleaner groups, the gas vent on the ball collecting chamber is opened, in pipeline normal pressure
In the case of, the blind plate of service cylinder is opened, the first pipe cleaner group in cleaning system is pushed at the concentric reducer of the service cylinder；
Step 42, blind plate, porus excretorius and the liquid injection hole for closing service cylinder inject nitrogen by injecting hole and push the first pipe cleaner group
It is run to the direction of ball collecting chamber, and the length of the cleaning solution set between the first pipe cleaner group and the second adjacent pipe cleaner group is big
The distance of the first pipe cleaner group operation is pushed in the nitrogen；
Step 43, it closes injecting hole and stops nitrogen injection, opening porus excretorius makes to serve a ball cylinder pressure to normal pressure, and it is blind to open service cylinder
Second pipe cleaner group is pushed at the concentric reducer of the service cylinder, closes the blind plate of service cylinder by plate；
Step 44, cleaning solution is filled by liquid injection hole, until porus excretorius has cleaning solution spilling, closes porus excretorius, continue to set
The remainder filling of the cleaning solution finish, and close liquid injection hole；
Step 45, injecting nitrogen by injecting hole pushes the second pipe cleaner group to run to the direction of ball collecting chamber, until the cleaning
System fully enters pipeline, opens injecting hole injecting compressed air and cleaning system is pushed to carry out washing and cleaning operation in the pipeline；
Step 5, the cleaning system is recycled from the ball collecting chamber, the step 5 specifically includes:
Step 51, during carrying out washing and cleaning operation in the pipeline in cleaning system, gas vent and mudhole is opened, pipe is worked as
Residue starts to close gas vent when being discharged from mudhole in road；
Step 52, it after indicator indicates that the first pipe cleaner group passes through completely, closes mudhole and stops blowdown；
Step 53, it opens the reception that drainage hole carries out cleaning solution and closes drainage hole after cleaning solution receives, open mudhole
Continue blowdown, after indicator indicates that the second pipe cleaner group passes through completely, closes mudhole and stop blowdown；
Step 54, the pipe cleaner in the cleaning system is made to fully enter ball collecting chamber；
Step 55, it closes injecting hole and stops compressed air injection, porus excretorius and gas vent are opened simultaneously, by pipeline pressure release to normal
Pressure, and the blind plate of ball collecting chamber is opened, recycle pipe cleaner；
Step 6, recovery processing is carried out to the pipeline, and examines the cleaning effect of the pipeline.
2. discarded oil-gas pipeline residue cleaning method according to claim 1, which is characterized in that the step 1, specifically
Include:
The design and operation maintenance data for consulting pipeline, obtain the wall thickness, bore, bearing capacity, pumped (conveying) medium feelings of the pipeline
Condition, pipeline purging or pigging situation relevant information judge whether the cleaning system can be by the pipeline.
3. discarded oil-gas pipeline residue cleaning method according to claim 1, which is characterized in that the step 2, specifically
Include:
On the pipeline, pipe sampling of breaking analyzes the thickness and ingredient of residues inside, determines and constitute cleaning system
Pipe cleaner type and cleaning solution type and cleaning solution dosage.
4. discarded oil-gas pipeline residue cleaning method according to claim 1, which is characterized in that described in step 42
Nitrogen pushes the distance of the first pipe cleaner group operation, is obtained according to the service life of nitrogen, the service life t=of the nitrogen
(P2×V2)/(Q×P1)；
Wherein, the pressure in P1- source nitrogen exit, Q- nitrogen flow, the numerical value of P2- service cylinder pressure gauge, the first pipe cleaner of V2-
The corresponding piping volume of group setting range ability.
5. discarded oil-gas pipeline residue cleaning method according to claim 1, which is characterized in that the step 6, specifically
Include:
Indicator is removed, ball collecting chamber and service cylinder are cut back；
By visual observation, wiping or disconnected pipe check pipeline residues inside inside pipeline, and pollute to received cleaning solution
Object concentration determination, and evaluate the effect after pipeline cleaning.
6. discarded oil-gas pipeline residue cleaning method according to claim 5, which is characterized in that the cleaning solution is water
Fundamental mode cleaning solution and/or flushing water.
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| CN107433273B (en) * | 2017-08-08 | 2020-06-12 | 中石化河南油建工程有限公司 | Harmless treatment method for waste crude oil pipeline |
| CN108672424A (en) * | 2018-05-14 | 2018-10-19 | 中国石油大学(华东) | A kind of sequentially-fed more pumps pipe cleaning device automatically |
| CN108994015A (en) * | 2018-09-10 | 2018-12-14 | 李得恩 | The cleaning method of pipeline |
| CN109530353A (en) * | 2018-10-10 | 2019-03-29 | 包头钢铁（集团）有限责任公司 | Ore slurry pipeline and the method for not stopping pressure pipe cleaning emitting operation |
| CN109990139A (en) * | 2019-04-17 | 2019-07-09 | 海洋石油工程股份有限公司 | A method of it is replaced applied to crude oil of offshore platform standpipe |
| CN109985868A (en) * | 2019-04-26 | 2019-07-09 | 马付林 | Oil pipeline inner wall cleaning oil pollution method |
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| CN111974771B (en) * | 2019-05-23 | 2022-06-07 | 杭州优益洁保洁服务有限公司 | Cleaning method for central air-conditioning air system pipeline |
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| CN111451225B (en) * | 2020-05-12 | 2023-10-31 | 北京埃尔德油气技术开发有限公司 | Pipeline cleaning operation method for long-distance pipeline |
| CN114392992A (en) * | 2021-12-21 | 2022-04-26 | 烟台杰瑞石油装备技术有限公司 | Oil and gas pipeline cleaning operation equipment and operation method |
| CN114378063A (en) * | 2021-12-28 | 2022-04-22 | 上海城市水资源开发利用国家工程中心有限公司 | Composite pipeline cleaning system and method |
| CN114472386B (en) * | 2022-01-25 | 2023-09-15 | 无锡贝斯柯自动化科技有限公司 | Intelligent cleaning method and system for particle powder conveying device |
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| JP2721050B2 (en) * | 1991-05-28 | 1998-03-04 | 株式会社 クボタ | In-pipe cleaning device using pig |
| CN102755979A (en) * | 2012-07-09 | 2012-10-31 | 中国海洋石油总公司 | Ball receiving and launching barrel for ocean platform |
| CN203124367U (en) * | 2012-12-27 | 2013-08-14 | 攀钢集团工程技术有限公司 | Cleaning device of pipeline for long-distance conveying of ore pulp |
| CN103071653A (en) * | 2012-12-27 | 2013-05-01 | 攀钢集团工程技术有限公司 | Elastic cleaning ball, cleaning device, cleaning method and pressure test device and method |
| CN203991546U (en) * | 2014-08-19 | 2014-12-10 | 中国化学工程第三建设有限公司 | A kind of pollution-free high-efficient long-distance pipe is installed purging system |
| CN104307822B (en) * | 2014-08-19 | 2016-04-13 | 中国化学工程第三建设有限公司 | A kind of pollution-free high-efficient long-distance pipe installs cleaning method |
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Effective date of registration: 20211110 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 China Petroleum Building, No. 9, Dongzhimen North Street, Dongcheng District, Beijing Patentee before: PetroChina Company Limited |