CN109013586A - A kind of gathering line segmentation pigging system and method - Google Patents
A kind of gathering line segmentation pigging system and method Download PDFInfo
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- CN109013586A CN109013586A CN201810995663.XA CN201810995663A CN109013586A CN 109013586 A CN109013586 A CN 109013586A CN 201810995663 A CN201810995663 A CN 201810995663A CN 109013586 A CN109013586 A CN 109013586A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a kind of gathering line segmentation pigging system and method, system includes at least one intermediate pigging system along gathering pipeline setting；The intermediate pigging system includes that main line pipe cleaner stops/transmission system, big bypass system, pipe cleaner instruction system and logic control system.Compared with prior art, the positive effect of the present invention is: the present invention is based on hydrops and slug load industrial analyses, carry out the digestion of pipeline slug flow using the mode of segmentation pigging；By backward pigging, realize that upstream come liquid reception, reduces end point slug stream load, avoids extending large-scale slug catcher using the volume of pipeline after the leading pigging in downstream to greatest extent；Pigging system structure is simple, and compared to conventional pigging station is increased, this scheme can save pipe cleaner ball collecting chamber, service cylinder and affiliated facility, heavy caliber, high pressure pipeline engineering project in there is advantage.
Description
Technical field
The present invention relates to a kind of gathering line segmentation pigging system and methods.
Background technique
It is developed with onshore and requires to improve, gathering pipeline pipeline tends to the feature of long range, Large Diameter Pipeline, high pressure etc.
It is further obvious.Gas field gathering line generally uses gas-liquid delivery mode, and with hypsography, pipeline hydrops problem is inevitable.
Pipeline hydrops is affected by many factors, mainly includes pipeline throughput rate, medium gas liquid ratio, pipeline topographic features etc..Particularly with throwing
The multiphase pipeline at production initial stage and production latter stage, mentions in production, Low flow rate pigging or all fronts intelligent measurement in Low flow rate, may induce
Hydrops forms slug flow in pipeline, flows to the treatment plant or gas gathering station of pipeline end point；If downstream slug flow catching apparatus and liquid phase
Processing unit is unable to satisfy the reception ability of instantaneous extensive slug flow, then large effect (such as liquid may be caused to production
Mutually enter gas handling system or complete plant shutdown)；And the reception device that (enlarging) meets a large amount of slug flow trapping loads is created, lead to
It is often costly.It is therefore proposed that suitable pipeline cleaning or slug flow trapping system and scheme, to gathering system, processing system
Safe and economical operation influence it is very big.
It is generated in gathering line under different operating conditions currently, analyzing software by commercial process and can more intuitively calculate
Slug amount, corresponding slug method for stream processing specifically include that 1) regular pigging, it is ensured that pipeline hydrops is no more than downstream slug flow and catches
Collection ability；2) downstream slug flow catching apparatus is extended, end slug flow trapping ability is improved, guarantees its trapping ability and practical work
Slug flow volume matched caused by condition；3) bypass type pigging equipment is used, extends pigging and releases the liquid measure time, slow down downstream slug
Treatment facility peak load；4) intermediate pigging yard is set, piecewise pigging is carried out, reduces end point slug stream load.The above method
There are respective handling characteristics and limitations: regular pigging can theoretically control the hydrops amount in pipeline, but frequently pigging exists
The problems such as O&M is costly, operation risk increases, there is also certain deviations for the calculating of scraper-running frequency；Extend downstream slug flow
Although trap is theoretically able to solve extreme slug flow load problem, construction investment is high, and equipment frequency of use phase
To lower, cost performance is not high；Bypass type pigging has minimum flow rate requirement in the actual operation process, can in low speed operation
The problems such as card ball can occur, operation risk are greater than common pigging mode；Piecewise pigging needs to be arranged intermediate pigging yard (band transmitting-receiving
Ball cylinder), equipment is more, high investment, and management requires height, and there is a problem of that frequency of use is relatively low.
Summary of the invention
The shortcomings that in order to overcome the prior art, the present invention provides a kind of gathering line segmentation pigging system and method, bases
Rule is formed in hydrops distribution and slug flow in pipeline, enters the upstream device time from reducing slug amount peak value, extending slug flow
With the angle of segment processing slug flow, (volume of pipeline section, receiving portion upstream tube are emptied using downstream by backward pigging principle
The pigging liquid measure of section), implement gathering line pigging and slug flow control, while passing through reduction internal diameter of the pipeline, by downstream hydrops
The means such as buffering, tube coupling disassembly realize pipe cleaner trapping and transmission without receiving ball tube, and the pipe cleaner for substituting high investment receives ball
Cylinder and service cylinder.
The technical scheme adopted by the invention is that: a kind of gathering line segmentation pigging system, including be arranged along gathering pipeline
At least one intermediate pigging system；The intermediate pigging system includes that main line pipe cleaner stops/transmission system, big bypass system
System, pipe cleaner instruction system and logic control system, in which:
The main line pipe cleaner stops/and transmission system includes the upstream reducing blend stop three being sequentially connected on gathering pipeline
Logical, upstream main line ball valve, upstream mains pressure transmitter, first order heavy wall tube coupling, second level heavy wall tube coupling, third level service pipe
Section, downstream mains pressure transmitter, downstream main line ball valve and downstream reducing blend stop threeway, are set to across upstream main line ball valve
Bleed/service control bypasses and is set to the bleed across downstream main line ball valve/receipts ball control bypass；
The big bypass system includes the bypass upstream ball valve being connected in the reducing blend stop threeway of upstream, bypass upstream pressure
Transmitter, bypass regulator valve, bypass downstream ball valve bypass downstream pressure transmitter, be connected in the reducing blend stop threeway of downstream；
The pipe cleaner instruction system includes being respectively arranged in upstream main line, downstream main line and main line pipe cleaner stop/hair
The pipe cleaner in system is sent to pass through indicator；
The logic control system includes pressure transmitter, pipe cleaner is collected by indicator signal and processing system, with
And ball valve/regulating valve coordinated control system.
The present invention also provides a kind of gathering lines to be segmented pigging method, including following content:
(1) when pipeline operates normally, completely all main line pipe cleaners stop/transmission system unlatching, and the second level is thick
Wall tube coupling is closed using conventional tube coupling substitution, big bypass system, and medium stops/transmission system through main line pipe cleaner by upstream line
Access downstream line；
(2) when pigging, the final stage pipeline cleaning of main line is carried out first: corresponding intermediate pigging system process is imported
Big bypass system closes the main line valve that main line pipe cleaner stopped/sent system, pipeline between release displacement valve, disassembly routine
After tube coupling, pipe cleaner is placed into the latter half of second level heavy wall tube coupling, and is installed on main line, is tested by tightness
Afterwards, the bypass of main line ball valve and the bypass of second level heavy wall pipe nipple are successively opened, ball valve upstream and downstream balance pressure is established, it is dry to open downstream
Thread ball valve, and reduce bypass regulator valve aperture, open upstream main line ball valve, realize service；Downstream pigging indicator issues signal
Afterwards, all valves of big bypass system are closed, all bypass valves of main line are closed；
(3) by pipe cleaner identical with (2) step installation and sending method, to continue main line segment pipe second from the bottom clear
Pipe: pipe cleaner is before entering intermediate pigging system, and after the first pig indicator, downstream main line ball valve is closed, the ball valve
Bypath system open, the bypass regulator valve of big bypass system reduces aperture, and big bypass system ball valve is opened, and pipe cleaner successively passes through
After crossing the threeway of reducing blend stop, pressure transmitter, regulating valve, the second pigging indicator, into the first half of the second heavy wall tube coupling；
It closes upstream main line ball valve and its bypass conduit, close downstream ball valve bypass conduit, put by gas release replacement piping, liquid
Separate tube road and the second heavy wall tube coupling bypass conduit, release displacement distance piece medium, then dismantle the second heavy wall tube coupling, receive chou
Beam.
Compared with prior art, the positive effect of the present invention is:
The present invention is based on hydrops and slug load industrial analyses, carry out pipeline slug flow using the mode of segmentation pigging and disappear
Change；By backward pigging, realize that upstream come liquid reception, reduces last point using the volume of pipeline after the leading pigging in downstream to greatest extent
Slug stream load avoids extending large-scale slug catcher；Pigging system structure is simple, compared to the conventional pigging station of increase, this side
Case can save pipe cleaner ball collecting chamber, service cylinder and affiliated facility, heavy caliber, high pressure pipeline engineering project in have it is excellent
Gesture.Specific manifestation are as follows:
(1) setting science
The present invention is based on the analyses of advanced processing simulation as a result, reasonable set pigging system position and quantity, pass through segmentation
The final cumulative pipeline hydrops into downstream trap is split as multiple gas entrainment and primary a small amount of slugs by pigging operations,
Before pipe cleaner carries out pipeline final stage pigging, generated hydrops is released volume and can be pressed from both sides in final stage pipeline section by air-flow
The form of band relatively evenly enters trap, and has longer digestion time；Final stage pipeline hydrops volume and trapping
The matching of device processing capacity guarantees in pigging whole process that downstream trap and other devices operate normally.
(2) economy is good
The increased main line pigging system structure of the present invention is simple, definite functions, utilizes the variation of special pipeline internal diameter and air-flow
Distribution makes march into the arena pipe cleaner reduction of speed and slow transmitting, alternative setting pipe cleaner ball collecting chamber and service cylinder, while certainly by pipeline
The hydrops ability of body avoids downstream from building large-scale slug catcher.
(3) safe operation: the main line pipe cleaner of setting stops/transmission system opens for operation operating condition, and when normal operation adopts
The second heavy wall tube coupling is replaced with conventional tube coupling, avoids the pressure loss；Disengaging section setting emptying and exchange system, guarantee operated
Cheng Anquan.
(4) switching is flexible: the main line pipe cleaner of setting stops/in transmission system can be changed to etc. when pipeline operates normally
Diameter main pipeline realizes that spherical pig directly passes through, reduces number of operations.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the distribution schematic diagram that this gathering line is segmented pigging system；
Fig. 2 is subsystem (intermediate pigging system) flow diagram that this gathering line is segmented pigging system.
Specific embodiment
A kind of gathering line segmentation pigging system, as depicted in figs. 1 and 2,
Total system include: initial station A, intermediate pigging system 1#, intermediate pigging system 2# ..., centre pigging system n# and
Terminal B；The intermediate pigging system is many places according to being arranged after technique, economic comparison, disposable clear over long distances for reducing
Pipeline section plug load, the route intermediate system for first carrying out downstream pigging, carrying out upstream pigging again.
Each intermediate pigging system is independent subsystem, comprising: enter the station pipeline 1, upstream reducing blend stop threeway 2, upstream for upstream
Main line ball valve 3, first order heavy wall tube coupling 4, second level heavy wall tube coupling 5, the third level service tube coupling 6, downstream main line ball valve 7, downstream
Reducing blend stop threeway 8, the outbound pipeline 9 in downstream, mains pressure transmitter 10/11, bypass ball valve 12/14/17/19/22/24, side
Road regulating valve 13/18/23, gas release displacement valve 15/20, liquid diffusion valve 16/21, bypass upstream ball valve 31, bypass are adjusted
Valve 32, bypass downstream ball valve 33, release displacement valve 34/37, pressure transmitter 35/36, bypass ball valve 38/40, bypass valve
39, pipe cleaner passes through indicator 41/25/42.
Wherein, ball valve 12, bypass valve 13 and bypass ball valve 14 are bypassed and forms upstream main line ball valve bypath system；Bypass
Ball valve 17, bypass valve 18 and bypass ball valve 19 form second level heavy wall tube coupling bypath system；Bypass ball valve 22, bypass is adjusted
Valve 23 and bypass ball valve 24 form downstream main line ball valve bypath system；The upstream main line ball valve bypath system, second level heavy wall
Tube coupling bypath system, downstream main line ball valve bypath system, upstream reducing blend stop threeway 2, upstream main line ball valve 3, first order heavy wall
Tube coupling 4, second level heavy wall tube coupling 5, the third level service tube coupling 6, downstream main line ball valve 7, downstream reducing blend stop threeway 8, under swim out of
Standing, pipeline 9, mains pressure transmitter 10/11, gas diffuse displacement valve 15/20, liquid diffusion valve 16/21 forms main line pipe cleaner
Stop/transmission system.The main line pipe cleaner stops/and transmission system sends and receivees for the pipe cleaner of no pipe cleaner receiving ball tube
System receives and extracts pipe cleaner by regulating valve, first order heavy wall tube coupling, second level heavy wall tube coupling synergy, pass through tune
Valve, second level heavy wall tube coupling, third level service tube coupling synergy are saved, installs and sends pipe cleaner.The first order thick-walled pipe
Horizontal installation, both ends are flanged joint, and detachably, one end connects upstream main line, and one end connects the second level heavy wall tube coupling,
Its outer diameter is consistent with upstream main line and downstream main line, and internal diameter is less than main line (customizing according to pipe cleaner magnitude of interference), inner tube wall slope
Bicker degree is 15 °, by upstream toward downstream progressive additive, plays the role of buffering pipe cleaner impact force, tube coupling length is not less than
10m carrys out spherical pig friction eceleration to upstream；The second level thick-walled pipe horizontal installation, both ends are flanged joint, detachably,
One end connects the first order heavy wall tube coupling, and one end connects third level service tube coupling, outer diameter and upstream main line and downstream main line
Unanimously, for internal diameter in the double horn shape of the mouth as one speaks formula of " both ends are big, intermediate small ", it is upstream that length, which meets 2.5 times of pipe cleaner size requirement,
The collecting region of pipe cleaner and the emitter region of downstream pipe cleaner, it is detachable and replace with and main line when all fronts carry out Intelligent pigging
The consistent isometrical tube coupling of pipeline specifications, directly passes through convenient for intelligent pig；The third level service tube coupling, both ends are flange company
It connects, detachably, one end connects the second level heavy wall tube coupling, and one end connects its outer diameter of downstream main line and upstream main line and downstream is dry
Line is consistent, and pipe cleaner passes through region when operating for service.The gas displacement release pipeline is the pipeline installed straight up
With ball valve 15/20, ball valve matches single valve or bivalve according to pressure requirements；The liquid release pipeline is installed straight down
Pipeline and ball valve 16/21, ball valve match single valve or bivalve according to pressure requirements；The gas displacement release pipeline and liquid are put
Separate tube road cooperates pressure transmitter numerical value, realizes the dismounting of detachable variable diameter tube coupling and spherical pig and reinstalls；It is described
Upstream main line ball valve bypath system is bleed/service control bypass across upstream main line ball valve 3, is small-aperture ball valve 12+ tune
It saves valve 13+ ball valve 14 to bypass, regulating valve Electronic control, bypass is installed with main line horizontal parallel, is risen when pipe cleaner receives and is introduced stream
Body scavenging pipeline and submain ball valve open the effect of push pipe cleaner service；The downstream main line ball valve bypath system be across
Bleed/receipts ball control the bypass for crossing downstream main line ball valve 7, bypasses, regulating valve for small-aperture ball valve 22+ regulating valve 23+ ball valve 24
Electronic control, bypass are installed with main line horizontal parallel, are cut after pipe cleaner opens and adjusted tolerance when receiving, pipe cleaner stops
The effect of direction bleed balance pressure when only the discharge of section fluid and pipe cleaner are sent；The second level heavy wall tube coupling bypath system is
It is 19 pipeline of small-aperture ball valve 17+ regulating valve 18+ ball valve, regulating valve across balance/purging bypass of second level heavy wall tube coupling 5
It manually controls, bypass is in main line lower opening, and low spot is across pipe cleaner stops forward horizontal stand upstream and downstream pressure to be removed and pigging
The effect of device transmission forward horizontal stand upstream and downstream pressure；The pressure transmitter 10/11 is installed on the main line ball valve and the second level is thick
Between wall tube coupling, quantity is 2, is responsible for monitoring and uploading isolation pipeline section internal pressure power.
Wherein, ball valve 38/40 is bypassed, bypass valve 39 forms release valve ball bypath system, the release valve ball bypass
System, bypass upstream ball valve 31, bypass regulator valve 32, bypass downstream ball valve 33, release displacement valve 34/37, pressure transmitter 35/
The 36 big bypass systems of composition.The big bypass system is the receipts ball of mains system, service, maintenance temporary medium channel；Its pipeline,
Valve material is consistent with upstream main line and downstream main line, and caliber is formulated according to specific operating condition, and flow velocity is higher than mains system；The side
Logical regulating valve, ball valve are Electronic control, for adjusting bypass displacement and control spherical pig in the main line pipe cleaner stop/hair
Send the receipts ball and service process in system；The release valve ball bypath system is bypass adjusting/balance across release valve ball 33
Pipeline is 40 pipeline of small-aperture ball valve 38+ regulating valve 39+ ball valve, and regulating valve manually controls, and bypass is pacified with main line horizontal parallel
Dress, plays balance bypass ball valve upstream and downstream pressure；The displacement release pipeline is the pipeline and ball valve installed straight up
34/37, ball valve matches single valve or bivalve according to pressure requirements；The pressure transmitter 35/36 is installed on the release valve ball
Between 31/33 and bypass regulator valve 32, quantity is 1, is responsible for monitoring and uploading isolation pipeline section internal pressure power.
Wherein, pig indicator 41/25/42 forms pipe cleaner and indicates system.The pipe cleaner instruction system quantity is 3
It is a, in addition to instruction pipe cleaner is into and out of intermediate pigging system, also indicates pipe cleaner and reach second level heavy wall system, pipe cleaner passes through
Signal is uploaded to logic control system.
In shown system, upstream 1 airbreak of pipeline that enters the station is horizontally mounted, and connects upstream reducing blend stop threeway 2, blend stop is for keeping away
Exempt from pipe cleaner card ball, guiding, reducing blend stop threeway 2 is for shunting medium；It is successively installed along 2 main channel side of reducing blend stop threeway
Upstream main line ball valve 3, first order heavy wall tube coupling 4, second level heavy wall tube coupling 5, the third level service tube coupling 6, downstream main line ball valve 7,
Downstream reducing blend stop threeway 8；Upstream main line ball valve 3 is whole-through diameter ball valve, and Electronic control, when normal operating opens, in the second level
It is closed when the disassembly of heavy wall tube coupling 5, installation；4 wall thickness of first order heavy wall tube coupling is greater than main pipeline, and has 15 ° and thicken the gradient, uses
Enter rear friction eceleration in pipe cleaner；Second level heavy wall tube coupling 5 is special construction, outer diameter and upstream main line and downstream main line one
It causes, internal diameter is the transmitting of the collecting region and downstream pipe cleaner of upstream pipe cleaner in the double horn shape of the mouth as one speaks formula of " both ends are big, intermediate small "
Area, when all fronts carry out Intelligent pigging, it is detachable and replace with the consistent isometrical tube coupling of main pipeline specification, it is clear convenient for intelligence
Pipe device directly passes through；Pipe cleaner passes through region when third level service tube coupling 6 is service operation；Downstream main line ball valve 7 is all-pass
Diameter ball valve, Electronic control, when normal operating, open, and close after pig indicator 41 detects that pipe cleaner passes through, second
Grade heavy wall tube coupling 5 is closed when dismantling, installing, and is reopened in service operation；The installation of the main line ball valve 3 bypass ball valve in upstream
12, the upstream main line ball valve bypath system that bypass valve 13 and bypass ball valve 14 form, bypath system and main line horizontal parallel
Installation plays a part of to introduce fluid scavenging pipeline when pipe cleaner receives and submain ball valve opens push pipe cleaner service, other
Road regulating valve 12 is Electronic control, and bypass ball valve 12/14 manually controls；Pressure inverting is installed close to 3 downstream of upstream main line ball valve
Device 10；4 distal opening of first order heavy wall tube coupling simultaneously installs pig indicator 25；First order heavy wall tube coupling 4, third level service pipe
Section 6 is open and installs gas displacement release pipeline (ball valve 15/20) and liquid release pipeline (ball valve 16/21), for dismantling section
With the medium release and displacement of construction section；The installation of main line ball valve 7 bypass ball valve 22, bypass valve 23 and bypass ball valve in downstream
The downstream main line ball valve bypath system of 24 compositions, bypath system and main line horizontal parallel are installed, and are risen when pipe cleaner receives and are opened simultaneously
Adjusted tolerance, when the discharge of cut-off section fluid and pipe cleaner are sent after pipe cleaner stops direction bleed balance pressure effect, it is other
Road regulating valve 23 is Electronic control, and bypass ball valve 22/24 manually controls；5 upstream and downstream of the heavy wall tube coupling installation bypass ball in the second level
The balance that valve 17, bypass valve 18 and bypass ball valve 19 form/purging bypass, for flat after pipe cleaner reception and before sending
Weigh first order heavy wall tube coupling 3 and third level service 5 internal pressure of tube coupling.
In shown system, big bypass system airbreak laying installs with main line horizontal parallel, connects reducing blend stop threeway 2/8.
Successively installation bypasses upstream ball valve 31, bypass regulator valve 32 and bypass downstream ball valve 33 on bypass duct, is Electronic control,
It is closed when normal operation, pig indicator 41 issues spherical pig by opening after signal；32 aperture of bypass regulator valve is by logic
Control system control, cooperates with bypass regulator valve 23；The installation of downstream ball valve 33 is bypassed by bypass ball valve 38/40, bypass valve
39 composition release valve ball bypath systems, for pipeline and main line pipe between balance bypass upstream ball valve 31 and bypass downstream ball valve 33
Road pressure；It bypasses upstream ball valve 31, bypass regulator valve 32 and bypasses pipeline tapping between downstream ball valve 33 and pressure inverting is installed
Device 35/36 and release displacement valve 34/37.
In shown system, pipe cleaner is installed on upstream main pipeline 1 by indicator 41, and clipping form can be used, and examines
It surveys, instruction pipe cleaner inbound case；Pipe cleaner is installed on downstream main pipeline 9 by indicator 42, and clipping form can be used,
Detection, the instruction outbound situation of pipe cleaner；It additionally includes the pipe cleaner and passes through indicator 25；Pipe cleaner passes through pointer detection
Signal is uploaded to logic control system.
The logic control system collects pipe cleaner by indicator, pressure transmitter, valve position signal, and to adjusting
The execution structure sending action signal of valve, ball valve, auxiliary complete pipe cleaner and receive, send operation.
The working principle of the invention and the course of work are as follows:
(1) under normal conveying, medium passes sequentially through each intermediate pipe cleaning device and gathering pipeline from upstream to downstream, enters
Downstream terminal.
(2) to improve pigging efficiency, the ability of upstream pigging liquid measure is received using pigging pipeline itself, pipeline is carried out inverse
Sequence is segmented pigging, i.e., first carries out downstream tube section pigging, the condition then emptied using downstream line, and upstream line carries out clearly again
Pipe, part pigging slug stay in downstream line, reduce the load for carrying out end slug catcher.Make being ready for pigging
When industry, by pipeline hydrops under industrial analysis calculating operation operating condition, analyze under the different intermediate pigging subsystem operations of total system
End maximum slug flow load reduces end slug by the fluid space that segmentation pigging and the leading pigging pipeline in downstream reserve
Fluid product.By analysis, determine operation strategy, for there are the pipeline of many places pigging system, selection need to carry out pigging service,
Receive the intermediate pigging system of ball and the intermediate pigging system for directly crossing ball.
(3) when carrying out pigging system pigging service operation among place last, the main line of each intermediate pigging system in upstream
Pipe cleaner stops/transmission system unlatching, and big bypass system is closed；The main line for carrying out pigging system among at this of service operation is clear
Pipe device stops/and transmission system closes and diffuses and replace, and big bypass system is opened.Pipe cleaner is placed in second level heavy wall tube coupling
In 5, second level heavy wall tube coupling 5 is installed, after the pressure test approved through excess pressure, passes through upstream main line ball valve 3 and downstream main line
Ball valve 7 sends pipe cleaner.
(4) hydrops in downstream line is pushed into end trapping system by pipe cleaner, and downstream line empties.
(5) continue place's service second from the bottom, place's pigging system last receives ball.As (3) description principle is sent out
Ball.When pipe cleaner enters place's pigging system last, big bypass system is opened, and main line pipe cleaner is stopped/sent under system
It swims main line ball valve to close, remaining valve is kept, and main line pipe cleaner stops/send the reduction of system overcurrent, and big bypath system overcurrent increases
Greatly, pipe cleaner is influenced by main line flow, first order heavy wall tube coupling and downstream main line valve downstream hydrops and is slowed down, and is eventually settled at
Second level heavy wall system front half section.And then upstream main line valve and downstream main line valve shunts system are closed, separate main line and the
Level-one heavy wall tube coupling, second level heavy wall tube coupling and third level service tube coupling, and diffuse, replace, dismantle, take ball.The secondary pigging pushes away
Liquid a part out stays in downstream and has emptied pipeline section, and a part enters end trapping system.
(6) according to (3)~(5) principle, completely segmentation pigging is realized.
The method for carrying out pigging using above-mentioned gathering line segmentation pigging system, includes the following steps:
Step 1: to built pipeline projects, according to pipeline hydrops and the analysis of pigging slug Technology as a result, in conjunction with terminal slug
Trapping ability is flowed, increased intermediate pigging system quantity is transformed in setting；To improve pigging efficiency, connect using pigging pipeline itself
The ability of upstream pigging liquid measure is received, pipeline carries out backward and is segmented pigging, i.e., first carries out downstream tube section pigging, then utilizes downstream tube
The condition that road empties, upstream line carry out pigging again, and part pigging slug stays in downstream line, reduce and carry out end slug flow
The load of trap.
Step 2: to newly-built pipeline projects, according to pipeline hydrops and the analysis of pigging slug Technology as a result, comprehensively considering newly-built
Intermediate pigging system and the investment of terminal slug flow trapping system, fully consider economy, functionality, increased intermediate pigging are arranged
System quantity and terminal slug flow trapping system ability；To improve pigging efficiency, it is clear that upstream is received using pigging pipeline itself
The ability of pipe liquid measure, pipeline carry out backward and are segmented pigging, i.e., first carry out downstream tube section pigging, then emptied using downstream line
Condition, upstream line carry out pigging again, and part pigging slug stays in downstream line, reduce and carry out end slug catcher
Load.
Step 3: when pipeline operates normally, completely all main line pipe cleaner stop/transmission system opens, described the
Second level heavy wall tube coupling reduces the pressure loss using conventional tube coupling substitution；Big bypath system is closed, and medium is by upstream line through main line
Pipe cleaner stops/sends system access downstream line.
Step 4: when pigging, the final stage pipeline cleaning of main line is carried out first.Specifically, by corresponding intermediate pigging
System flow imports big bypath system, closes the main line valve that main line pipe cleaner stopped/sent system, manages between release displacement valve
Pipe cleaner is placed into the latter half of second level heavy wall tube coupling, and be installed on main line, adopted by road after dismantling conventional tube coupling
After testing tightness with the mode that operation allows, the bypass of main line ball valve and the bypass of second level heavy wall pipe nipple are successively opened, ball is established
Valve upstream and downstream balances pressure, opens downstream main line ball valve, and reduces big bypass valve aperture, opens upstream main line ball valve, real
Now serve a ball；After downstream pigging indicator 42 issues signal, all valves of big bypath system are closed, close all bypass valves of main line
Door.
Step 5: continue main line segment pipe pigging second from the bottom.Pipe cleaner installation, sending method equivalent steps four.
Pipe cleaner is before entering intermediate pigging system, and after the first pig indicator 41, downstream main line ball valve is closed, the ball valve
Bypath system is opened, and the bypass regulator valve of big bypass system reduces aperture, and big bypass system ball valve is opened, and pipe cleaner passes through reducing
After blend stop threeway, by entering, main line tolerance is reduced, hydrops etc. influences before the first heavy wall tube coupling friction and downstream main line ball valve, speed
It reduces, valve events is detected and adjusted by pressure transmitter, after pipe cleaner passes through the second pigging indicator 25, into the second heavy wall
The first half of tube coupling；It closes upstream main line ball valve and its bypass conduit, close downstream ball valve bypass conduit, diffused by gas
Replacement piping, liquid release pipeline and the second heavy wall tube coupling bypass conduit, release displacement distance piece medium, and dismantle the second heavy wall
Tube coupling receives chou beam.
Step 6: when all fronts need it is disposable carry out Intelligent pigging when, all main line pipe cleaners are stopped/send system
First heavy wall tube coupling, the second heavy wall tube coupling replace with the tube coupling being equal with main line specification, provide pigging for all fronts Intelligent pigging and set
The standby channel passed through.
Claims (10)
1. a kind of gathering line is segmented pigging system, it is characterised in that: at least one centre including being arranged along gathering pipeline is clear
Guard system；The intermediate pigging system includes that main line pipe cleaner stops/transmission system, big bypass system, pipe cleaner instruction system
And logic control system, in which:
The main line pipe cleaner stops/transmission system include the upstream reducing blend stop threeway being sequentially connected on gathering pipeline, on
Swim main line ball valve, upstream mains pressure transmitter, first order heavy wall tube coupling, second level heavy wall tube coupling, the third level service tube coupling, under
Swim mains pressure transmitter, downstream main line ball valve and downstream reducing blend stop threeway, be set to the bleed across upstream main line ball valve/
Service control bypasses and is set to the bleed across downstream main line ball valve/receipts ball control bypass；
The big bypass system includes the bypass upstream ball valve being connected in the reducing blend stop threeway of upstream, bypass upstream pressure pick-up
Device, bypass regulator valve, bypass downstream ball valve bypass downstream pressure transmitter, be connected in the reducing blend stop threeway of downstream；
The pipe cleaner instruction system includes being respectively arranged in upstream main line, downstream main line and main line pipe cleaner stop/transmission system
Pipe cleaner on system passes through indicator；
The logic control system includes pressure transmitter, pipe cleaner is collected by indicator signal and processing system, Yi Jiqiu
Valve/regulating valve coordinated control system.
2. a kind of gathering line according to claim 1 is segmented pigging system, it is characterised in that: the main line pipe cleaner stops
Stay/transmission system includes the gas release for being set to the bypass of the balance across second level heavy wall tube coupling/purging, being set on pipeline
Replacement piping and liquid diffuse pipeline.
3. a kind of gathering line according to claim 2 is segmented pigging system, it is characterised in that: the bleed/service control
System bypass and bleed/receipts ball control bypass are small-aperture ball valve+regulating valve+ball valve bypass, regulating valve Electronic control, bypass with
The installation of main line horizontal parallel；The balance/purging bypass is small-aperture ball valve+regulating valve+ball valve pipeline, and regulating valve is controlled manually
System, bypass in main line lower opening, low spot across.
4. a kind of gathering line according to claim 1 is segmented pigging system, it is characterised in that: the big bypass system packet
Include release replacement piping and across bypass downstream ball valve bypass adjust/balance pipeline.
5. a kind of gathering line according to claim 4 is segmented pigging system, it is characterised in that: the bypass is adjusted/put down
Weighing apparatus pipeline is small-aperture ball valve+regulating valve+ball valve pipeline, and regulating valve manually controls, and bypass is installed with main line horizontal parallel.
6. a kind of gathering line according to claim 1 is segmented pigging system, it is characterised in that: the first order thick-walled pipe
Horizontal installation, both ends are flanged joint, and detachably, one end connects upstream main line, and one end connects the second level heavy wall tube coupling,
Its outer diameter is consistent with upstream main line and downstream main line, and internal diameter is less than main line, and inner tube wall bevel angle is 15 °, downward by upstream
Progressive additive is swum, plays the role of buffering pipe cleaner impact force, tube coupling length is more than or equal to 10m.
7. a kind of gathering line according to claim 1 is segmented pigging system, it is characterised in that: the second level thick-walled pipe
Horizontal installation, both ends are flanged joint, and detachably, one end connects the first order heavy wall tube coupling, and one end connects third level hair
Bulb section, outer diameter is consistent with upstream main line and downstream main line, double horn shape of the mouth as one speaks formula of the internal diameter in " both ends are big, intermediate small ", length
Degree meets 2.5 times of pipe cleaner size requirement.
8. a kind of gathering line according to claim 1 is segmented pigging system, it is characterised in that: the third level service pipe
Section both ends are flanged joint, and detachably, one end connects the second level heavy wall tube coupling, one end connect its outer diameter of downstream main line with it is upper
It is consistent with downstream main line to swim main line.
9. a kind of gathering line is segmented pigging method, it is characterised in that: including following content:
(1) when pipeline operates normally, completely all main line pipe cleaners stop/transmission system unlatching, the second level thick-walled pipe
Section is closed using conventional tube coupling, big bypass system, and medium stops/send system access downstream through main line pipe cleaner by upstream line
Pipeline；
(2) when pigging, the final stage pipeline cleaning of main line is carried out first: corresponding intermediate pigging system process being imported big other
Way system, closes the main line valve that main line pipe cleaner stopped/sent system, and pipeline between release displacement valve dismantles conventional tube coupling
Afterwards, pipe cleaner is placed into the latter half of second level heavy wall tube coupling, and is installed on main line, after tightness is tested,
The bypass of main line ball valve and the bypass of second level heavy wall pipe nipple are successively opened, ball valve upstream and downstream balance pressure is established, opens downstream main line
Ball valve, and reduce bypass regulator valve aperture, open upstream main line ball valve, realize service；After downstream pigging indicator issues signal,
All valves of big bypass system are closed, all bypass valves of main line are closed；
(3) continue main line segment pipe pigging second from the bottom by pipe cleaner identical with (2) step installation and sending method: clear
Pipe device is before entering intermediate pigging system, and after the first pig indicator, downstream main line ball valve is closed, the bypass of the ball valve
System is opened, and the bypass regulator valve of big bypass system reduces aperture, and big bypass system ball valve is opened, and pipe cleaner successively passes through reducing
After blend stop threeway, pressure transmitter, regulating valve, the second pigging indicator, into the first half of the second heavy wall tube coupling；In closing
It swims main line ball valve and its bypass conduit, close downstream ball valve bypass conduit, diffuse pipeline by gas release replacement piping, liquid
With the second heavy wall tube coupling bypass conduit, then release displacement distance piece medium dismantles the second heavy wall tube coupling, receives chou beam.
10. a kind of gathering line according to claim 9 is segmented pigging method, it is characterised in that: when all fronts need once
Property carry out pigging when, all main line pipe cleaners are stopped/are sent the first heavy wall tube coupling of system, the second heavy wall tube coupling replace with
The equivalent tube coupling of main line specification.
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| CN201810995663.XA CN109013586B (en) | 2018-08-29 | 2018-08-29 | Segmented pipe cleaning system and method for gathering and conveying pipeline |
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| CN201810995663.XA CN109013586B (en) | 2018-08-29 | 2018-08-29 | Segmented pipe cleaning system and method for gathering and conveying pipeline |
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