CN208787116U - A kind of gathering line segmentation pigging system - Google Patents

Abstract

The utility model discloses a kind of gathering lines to be segmented pigging system, including at least one the intermediate pigging system being arranged along gathering pipeline；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 good effect of the utility model is: the utility model is based on hydrops and slug load industrial analysis, carries 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

A kind of gathering line segmentation pigging system

Technical field

The utility model relates to a kind of gathering lines to be segmented pigging system.

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 utility model provide a kind of gathering line segmentation pigging system, are based on In pipeline hydrops distribution and slug flow form rule, from reduce slug amount peak value, extend slug flow enter the upstream device time and The angle of segment processing slug flow (empties the volume of pipeline section, receiving portion upstream pipeline section using downstream by backward pigging principle Pigging liquid measure), implement gathering line pigging and slug flow control, at the same by reducing internal diameter of the pipeline, it is slow by downstream hydrops The means such as punching, tube coupling disassembly realize pipe cleaner trapping and transmission without receiving ball tube, substitute the pipe cleaner ball collecting chamber of high investment With service cylinder.

The technical scheme adopted by the utility model is a kind of gathering line is segmented pigging system, including along gathering pipeline The intermediate pigging system of at least one being arranged；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/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.

Compared with prior art, the good effect of the utility model is:

The utility model is based on hydrops and slug load industrial analysis, carries out pipeline slug flow using the mode of segmentation pigging Digestion；By backward pigging, realize that upstream come liquid reception, reduces end using the volume of pipeline after the leading pigging in downstream to greatest extent Point slug stream load, avoids extending large-scale slug catcher；Pigging system structure is simple, compares and increases conventional pigging station, this Scheme 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 utility model is based on advanced processing simulation and analyzes as a result, reasonable set pigging system position and quantity, pass through Pigging operations are segmented, the final cumulative pipeline hydrops into downstream trap is split as multiple gas entrainment and primary a small amount of sections Plug, before pipe cleaner carries out pipeline final stage pigging, generated hydrops, which releases volume, to pass through gas in final stage pipeline section The form of entrainment is flowed, relatively evenly enters trap, and there is longer digestion time；Final stage pipeline hydrops volume with The matching of trap 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 utility model is simple, definite functions, using the variation of special pipeline internal diameter and Distribution of air flow makes march into the arena pipe cleaner reduction of speed and slowly transmitting, alternative setting pipe cleaner ball collecting chamber and service cylinder, while passing through pipe The hydrops ability in road itself 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

The utility model will illustrate by example and with reference to the appended drawing, 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 and the course of work of the utility model 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 (8)

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.