CN106523854B - A kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball and method - Google Patents
A kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball and method Download PDFInfo
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- CN106523854B CN106523854B CN201710011199.1A CN201710011199A CN106523854B CN 106523854 B CN106523854 B CN 106523854B CN 201710011199 A CN201710011199 A CN 201710011199A CN 106523854 B CN106523854 B CN 106523854B
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- valve
- ball
- pipe cleaning
- corrosion inhibiter
- cleaning valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
-
- 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
Abstract
The invention discloses a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball and method, system includes that vehicle-mounted corrosion inhibiter injected system, pipe cleaning valve service system, pipe cleaning valve receive ball system and corrosion inhibiter recovery system.Compared with prior art, the positive effect of the present invention is：(1) simple for process：The present invention controls the pre- film ball speed of service by controlling gas pressure, to carry out the pre- film of corrosion inhibiter to pipeline；Cooperation equipment, operation is more convenient, and the equipment can be reused in multiple yards, save a large amount of capital expenditures and operational administrative expense.(2) safe and reliable：The present invention has the operating processes such as emptying, blowdown and slug flow trapping with pressure, ensures technological process and equipment safety stable operation in yard.(3) investment reduction：The present invention relies on the receiving ball tube or pipe cleaning valve that yard carries, adaptable, without newly-built Large-Scale Equipment, can not only be also convenient for operating with investment reduction.
Description
Technical field
The invention belongs to Oil and Natural Gas Engineering technical fields, and in particular to a kind of remote heavy caliber collecting pipe inhibition
The pre- membranous system of agent list ball and method.
Background technology
With the aging of the High Speed Construction and its working pipeline of gas collector and delivery pipe, corrosive pipeline perforation and leakage fire
Accident happens occasionally.The pre- membrane technology of corrosion inhibiter is as a kind of anti-corrosion method easy for operation, economical and efficient, in collecting pipe
Application in system is extremely wide.Common plus agent method be corrosion inhibiter is atomized into micron-sized drop using high pressure nozzle, and
Spray makes it with airflow function to inner wall of the pipe to gas collection tube hub；But due to air velocity, pipeline laying hypsography, delay
The influence of the factors such as agent fogging degree and injection pressure of erosion, the anti-corrosion distance of this charging method and whole corrosion mitigating effect all will be by
To great limitation.Therefore, the pre- membrane technology of corrosion inhibiter also just comes into being, and increasingly by pipeline operation management person and expert
The extensive concern of scholar.Currently, the pre- membrane process of corrosion inhibiter mainly has three kinds of pouring-in, injecting type and wiper to add work both at home and abroad
Skill.Wherein, wiper adds technique and can effectively be combined with pipeline cleaning system, can disposably reach pigging, wash pipe, pre- film
Purpose, and corrosion inhibiter film forming is uniform, corrosion mitigating effect is notable；Therefore this method receives collecting pipe guardian favor.
Current wiper adds technique and generally uses the pre- membrane technology of double balls, i.e., is first packed into two spherical pigs in service cylinder,
Carry quantitative corrosion inhibiter fluid column secretly therebetween, pressure difference pushes spherical pig before and after then utilizing spherical pig, makes spherical pig and fluid column together
It is sent to the ball collecting chamber of pipe end.However, due to being limited by wiper service tube length degree, the inhibition of entrained between two balls
Agent liquid column length is very limited, is more than DN250, length in the remote gas collecting tube of 50km or more for caliber, delays needed for pre- film
The liquid column length for losing agent is at least 70~80m, and general cylinder of serving a ball obviously can not carry so long fluid column secretly.Therefore, the pre- film of double balls
Technique is only applicable to the collecting pipe that distance is shorter, caliber is smaller.For this purpose, for remote heavy caliber collecting pipe or being provided only with
Collecting pipe of the pipe cleaning valve without pigging receiving ball tube, it is necessary to provide a kind of simple for process, economical and efficient, it is adaptable,
Operate nimble corrosion inhibiter list ball prefilming method and equipment.
Invention content
The shortcomings that in order to overcome the prior art, the present invention provides a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball is pre-
Membranous system and method are mainly used for effectively controlling the internal corrosion of such pipeline, improve its service life, ensure that operational management is pacified
Entirely.It, which is equipped, has the function of corrosion inhibiter injection and corrosion inhibiter recycling etc.；It is mainly used for more quickly and easily compounding practice personnel
Complete the pre- membrane operations of corrosion inhibiter list ball.
The technical solution adopted in the present invention is：A kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball, packet
It includes vehicle-mounted corrosion inhibiter injected system, pipe cleaning valve service system, pipe cleaning valve and receives ball system and corrosion inhibiter recovery system, wherein：
The vehicle-mounted corrosion inhibiter injected system includes load wagon, corrosion inhibiter tank and electric submersible pump, in corrosion inhibiter tank top pipe
Ball valve V7 is provided at mouth；
The pipe cleaning valve service system includes the pipe cleaning valve V3 being arranged on outgoing line, the row of being provided on pipe cleaning valve V3
Dirty valve V6, pressure gauge G2 and safety vent valve V8, it is other on safety vent valve V8 to be connected to ball valve V4；The setting of the upstreams pipe cleaning valve V3 is dry
The downstreams thread ball valve V1, pipe cleaning valve V3 are sequentially connected main line ball valve V2 and cross ball indicator；
It includes being arranged in the pipe cleaning valve V10 on pipeline that enters the station that the pipe cleaning valve, which receives ball system, is provided on pipe cleaning valve V10
Blowdown valve V14, safety vent valve V19 and pressure gauge G5, it is other on safety vent valve V19 to be connected to ball valve V21；On pipe cleaning valve V10
Trip was sequentially connected ball indicator and main line ball valve V11, pipe cleaning valve V10 downstream connection ball valves V15, main line ball valve V12, ball valve
V18 and main line ball valve V13；
The corrosion inhibiter recovery system includes load wagon and skid slug catcher, in skid slug catcher entrance
Place setting ball valve V16；Ball valve V17 is set at skid slug catcher gaseous phase outlet.
The present invention also provides a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball prefilming methods, including following content：
One, pipe cleaning valve service and corrosion inhibiter filling：
(1) corrosion inhibitor solution has been configured in corrosion inhibiter storage tank according to adding amount needed for pre- film, and be transported to by load wagon
At pipe cleaning valve V3；
(2) main line ball valve V1 is closed, pipe cleaning valve V3 is closed, opens ball valve V4, when pressure gauge G2 is shown as 0, is opened clear
The Quick Release valve deck of pipe valve V3 is put into corrosion inhibiter fluid column leading edge control plug, closes the Quick Release valve deck of pipe cleaning valve V3 and open pipe cleaning valve
V3；
(3) ball valve V7 is connect with the blowdown valve V6 of pipe cleaning valve V3 by quick coupling, opens V6 and V7, corrosion inhibiter is molten
Liquid is filled into outgoing line, and forms corrosion inhibiter fluid column in control plug rear end；
(4) after filling, V6, V7 are closed, electric submersible pump is closed, removes quick coupling；
(5) pipe cleaning valve V3 is closed, surplus liquid in blowdown valve V6 discharge spherical cavities is opened, opens ball valve V4, wait for pressure gauge G2
It is shown as 0, opens the Quick Release valve deck of pipe cleaning valve V3, is packed into pre- film ball, closes the Quick Release valve deck of pipe cleaning valve V3, opens main line ball valve
V1 opens pipe cleaning valve V3, is released pre- film ball, corrosion inhibitor solution and control plug using air pressure in station；
(6) it has served as after ball indicator shows that pre- film ball is outbound, adjusting natural gas Outlet pressure, controlling the operation of pre- film ball
Speed makes corrosion inhibiter full-section pipe-flow length and its residence time before pre- film ball meet pre- film requirement；
Two, pipe cleaning valve receives ball and corrosion inhibiter recycling：
(1) the ball valve V16 of corrosion inhibiter recovery system and ball valve V17 is received into ball system with pipe cleaning valve respectively by quick coupling
Ball valve V15 be connected with ball valve V18, close main line ball valve V12, open ball valve V15, V16, V17, V18, make to enter the station in pipeline
Fluid flows into downstream main line valve V13 by skid slug catcher；
(2) it has served as after ball indicator sends out signal, has confirmed corrosion inhibiter fluid column leading edge control plug in pipe cleaning valve V10,
Pipe cleaning valve V10 is closed, ball valve V21 and blowdown valve V14 is opened, ball intracavity liquid is emptied by blowdown valve V14, waits for that pressure gauge G5 is aobvious
When being shown as 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, takes out corrosion inhibiter fluid column leading edge control plug；
(3) the Quick Release valve deck of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, extra corrosion inhibiter and pipe inner product liquid stream enter sled
Slug catcher is filled, corrosion inhibiter and sewage mixed solution fall to skid slug catcher bottom, and natural gas is by catching mist
Device, ball valve V17 and ball valve V18 flow into the line downstream that enters the station；When pre- film ball enters in pipe cleaning valve V10, pipe cleaning valve V10 is closed,
Ball valve V15, V16, V17, V18 are closed, quick coupling is removed, opens main line ball valve V12；
(4) ball valve V21 and blowdown valve V14 is opened, pigging valve insertion dirt is discharged by blowdown valve V14；As pressure gauge G5
When being shown as 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, pre- film ball is taken out, clear water is used in combination to clean pipe cleaning valve V10 residue dirts；
The Quick Release valve deck of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened.
Compared with prior art, the positive effect of the present invention is：The present invention is asked for existing for existing double pre- membrane technologies of ball
Topic proposes a kind of new method being suitble to the remote pre- film of heavy caliber air transmission pipeline corrosion inhibitor, enriches and expand the pre- membrane technology of corrosion inhibiter
And its application range, specific advantage performance are as follows：
(1) simple for process：The present invention controls the pre- film ball speed of service by controlling gas pressure, to pipeline
Carry out the pre- film of corrosion inhibiter；Cooperation equipment, operation is more convenient, and the equipment can be reused in multiple yards, save a large amount of bases
Build investment and operational administrative expense.
(2) safe and reliable：The present invention has the operating processes such as emptying, blowdown and slug flow trapping with pressure, ensures in yard
Technological process and equipment safety stable operation.
(3) investment reduction：The present invention relies on the receiving ball tube or pipe cleaning valve that yard carries, adaptable, without newly-built
Large-Scale Equipment can be not only also convenient for operating with investment reduction.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the process diagram of the present invention, wherein：1 line upstream gas zone, 2 pre- film balls, 3 corrosion inhibitor solutions, 4, inhibition
Agent fluid column leading edge control plug, 5 line downstream gas zones.
Fig. 2 sends system for corrosion inhibiter injection with pre- film ball, wherein：6 outgoing lines, 7 cross ball indicators, 8 insulating joints,
9 load wagons, 10 corrosion inhibiter storage tanks, 11 electric submersible pumps, 12 quick couplings, G1~G3 pressure gauges, N1 sewage draining exits, N2 ozzles, V1~V2
Main line ball valve (normally opened), V3 pipe cleaning valves, V4~V5 ball valves (often closing), V6 blowdown valves (often closing), V7 ball valves (often closing), V8~V9 peaces
Full blow valve；AG and UG indicates ground or more and below ground respectively in figure.
Fig. 3 is corrosion inhibiter and pre- film ball recovery system, wherein：13 enter the station pipeline, 14 insulating joints, 15 cross ball indicators,
16 load wagons, 17 skid slug catchers, 18 cyclone separators, 19 liquid separation baffles, 20 mist eliminators, G4~G6 pressure gauges, N3
Corrosion inhibiter recovery port, N4 sewage draining exits, N5 manholes, N6~N7 ozzles, V10 pipe cleaning valves, V11~V13 main lines ball valve (normally opened), V14
Blowdown valve, V15~V18 ball valves, V19~V20 safety vents valve, V21~V22 ball valves (often closing)；AG and UG is indicated respectively in figure
More than ground and below ground.
Specific implementation mode
A kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball, including vehicle-mounted corrosion inhibiter injected system, pigging
Valve service system, pipe cleaning valve receive ball system and corrosion inhibiter recovery system.
Illustrate present system composition and connection type below in conjunction with the accompanying drawings.
Fig. 2 sends system for corrosion inhibiter injection with pre- film ball, wherein：
Vehicle-mounted corrosion inhibiter injected system is by 12 groups of load wagon 9, corrosion inhibiter tank 10, electric submersible pump 11, ball valve V7 and quick coupling
At；Corrosion inhibiter tank 10 is directly anchored to by saddle on load wagon 9；10 bottom of corrosion inhibiter storage tank sets sewage draining exit N1, and top sets pipe
Mouth N2；Ball valve V7 can be connect by quick coupling 12 with the blowdown valve V6 of pipe cleaning valve V3；Electric submersible pump 11 can be stretched by ozzle N2
Pot bottom simultaneously aspirates corrosion inhibitor solution, and corrosion inhibiter is injected in outbound pipeline 6.
Pipe cleaning valve serves a ball system by outgoing line 6, excessively ball indicator 7, insulating joint 8, main line ball valve V1~V2, pipe cleaning valve
V3, ball valve V4~V5, blowdown valve V6, safety vent valve V8~V9 and pressure gauge G1~G3 compositions；Pipe cleaning valve V3 is arranged in outbound
On pipeline 6, the upstreams pipe cleaning valve V3 connect main line ball valve V1 and pressure gauge G1, and pipe cleaning valve V3 downstream connection pressure gauge G3 are put safely
Empty valve V9, main line ball valve V2 cross ball indicator 7 and insulating joint 8；Blowdown valve V6, pressure gauge G2 and peace are connected on pipe cleaning valve V3
Full blow valve V8；It is connected on safety vent valve V8, is connected on by ball valve V5 on safety vent valve V9 by ball valve V4.
Fig. 3 is corrosion inhibiter and pre- film ball recovery system, wherein：
Corrosion inhibiter recovery system is by 22 groups of load wagon 16, skid slug catcher 17, quick coupling 21 and quick coupling
At；Skid slug catcher 17 is fixed on by saddle on load wagon 16；17 Inlet ball valve V16 of skid slug catcher can
To be connected with ball valve V15 by quick coupling 21；17 gaseous phase outlet ball valve V17 of skid slug catcher passes through quick coupling 22
It is connected with ball valve V18；Cyclone separator 18 is arranged in skid slug catcher inner port, and liquid separation baffle 19 is arranged in bottom, point
The bottom setting corrosion inhibiter in 19 left side of liquid baffle recycles ozzle N3, the bottom setting blowdown ozzle N4 on 19 right side of liquid separation baffle；Sled
It is connected on safety by 17 top setting mist eliminator 20 of dress slug catcher, inspection manhole N5 and safety vent valve V20, ball valve V22
On blow valve V20.
Pipe cleaning valve receives ball system by the pipeline 13 that enters the station, insulating joint 14, excessively ball indicator 15, pipe cleaning valve V10, main line ball valve
V11~V13, blowdown valve V14, ball valve V15, ball valve V18, ball valve V21, safety vent valve V19 and pressure gauge G4~G6 compositions；Clearly
Pipe valve V10, which is arranged in, to enter the station on pipeline 13, and the upstreams pipe cleaning valve V10 connect insulating joint 14, cross ball indicator 15, main line ball valve
V11 and pressure gauge G4, pipe cleaning valve V10 downstream connection ball valves V15, main line ball valve V12, ball valve V18, main line ball valve V13 and pressure
Table G6；Blowdown valve V14, safety vent valve V19, pressure gauge G5 are connected on pipe cleaning valve V10；Safety vent valve is connected on by ball valve V21
V19。
Illustrate the main function and operation principle of each system of the present invention below.
It is controlled as shown in Figure 1, the pre- film of corrosion inhibiter list ball sends corrosion inhibiter fluid column leading edge using the pipe cleaning valve V3 of service system
Plug 4 pre-processes inner wall of the pipe, removes the impurity such as hydrops in inner wall iron rust and pipe, while ensureing that corrosion inhibiter fluid column is in always
Full pipe condition.
Quantitative corrosion inhibitor solution 3 is pumped into collecting pipe by the pre- film of corrosion inhibiter list ball using vehicle-mounted corrosion inhibiter injected system.
The pre- film of corrosion inhibiter list ball sends pre- film ball 2 using the pipe cleaning valve V3 of service system.
The pre- film of corrosion inhibiter list ball receives fluid column leading edge control plug 4 using the pipe cleaning valve V10 for receiving ball system.
The pre- film of corrosion inhibiter list ball recycles extra delay using the trapping of skid slug catcher 17 of corrosion inhibiter recovery system
Agent liquid plug is lost, and is transported to central treating station processing and reuses.
The pre- film of corrosion inhibiter list ball receives pre- film ball 2 using the pipe cleaning valve V10 for receiving ball system.
The pre- film of corrosion inhibiter list ball controls pre- 2 speed of service of film ball using natural gas Outlet pressure in yard, makes to be in full packages
The corrosion inhibitor solution of stream meets pre- film requirement in the residence time of pipeline section.
Pipe cleaning valve is served a ball and corrosion inhibiter fills flow as shown in Fig. 2, its specific implementation step is as follows：
(1) the corrosion inhibiter adding amount needed for pre- film is calculated according to formula (1), in advance according to adding amount in corrosion inhibiter storage tank 10
In configured corrosion inhibitor solution, and pipe cleaning valve V3 is moved to by load wagon 9 and is served a ball at system；
(2) main line ball valve V1 is closed, pipe cleaning valve V3 is closed, opens ball valve V4, waits for that pressure gauge G2 is shown as 0, opens pigging
The Quick Release valve deck of valve V3 is put into corrosion inhibiter fluid column leading edge control plug 4, closes the Quick Release valve deck of pipe cleaning valve V3, open pipe cleaning valve V3.
(3) the pump discharge ball valve V7 of car-mounted device is connect with the blowdown valve V6 of pipe cleaning valve V3 by quick coupling 12, is beaten
Opening ball valve V6 and V7 open electric submersible pump 11, the corrosion inhibitor solution in storage tank 10 are filled into outgoing line 6, and in control plug 4
Rear end forms corrosion inhibiter fluid column.
(4) after injecting, ball valve V6, V7 are closed successively, are closed electric submersible pump 11, are removed quick coupling 12.
(5) pipe cleaning valve V3 is closed, surplus liquid in blowdown valve V6 discharge spherical cavities is opened, opens ball valve V4, wait for pressure gauge G2
It is shown as 0, opens the Quick Release valve deck of pipe cleaning valve V3, is packed into pre- film ball 2, closes the Quick Release valve deck of pipe cleaning valve V3, opens main line ball
Valve V1 opens pipe cleaning valve V3, is pushed away pre- film ball 2, corrosion inhibitor solution 3 and corrosion inhibiter fluid column leading edge control plug 4 using air pressure in station
Go out.
(6) it has served as after ball indicator 7 shows that pre- film ball 2 is outbound, to be adjusted according to pipeline fluctuation situation and formula (3)
Natural gas Outlet pressure controls pre- 2 speed of service of film ball, keeps corrosion inhibiter full-section pipe-flow length and its residence time before pre- film ball 2 full
The pre- film requirement of foot.
Pipe cleaning valve receives ball and corrosion inhibiter recovery process as shown in figure 3, its specific implementation step is as follows：
(1) quick coupling of equipment 21 and 22 are connected with ball valve V15 and ball valve V18 respectively, close main line ball valve
V12 opens valve V15, V16, V17, V18；It enters the station at this time under fluid is flowed by skid slug catcher 17 in pipeline 13
Swim main line valve V13.
(2) it has served as after ball indicator 15 sends out signal, confirming corrosion inhibiter fluid column leading edge control plug 4 in pipe cleaning valve V10
It is interior, pipe cleaning valve V10 is closed, ball valve V21 and blowdown valve V14 is opened, ball intracavity liquid is emptied by blowdown valve V14, waits for pressure gauge
When G5 is shown as 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, takes out corrosion inhibiter fluid column leading edge control plug 4.
(3) the Quick Release valve deck of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, extra corrosion inhibiter and pipe inner product liquid stream enter sled
Slug catcher 17 is filled, corrosion inhibitor solution passes through 18 pre-separation of cyclone separator；Corrosion inhibiter and sewage mixed solution are fallen to
17 bottom of skid slug catcher, natural gas flow into 13 downstream of pipeline of entering the station by mist eliminator 20, ball valve V17 and ball valve V18；
When pre- film ball 2 enters in pipe cleaning valve V10, pipe cleaning valve V10 is closed, ball valve V15, V16, V17, V18 is closed, removes quick coupling
21 and 22, open main line ball valve V12.
(4) ball valve V21 and blowdown valve V14 is opened, pigging valve insertion dirt is discharged by blowdown valve V14；As pressure gauge G5
When being shown as 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, pre- film ball 2 is taken out, is used in combination clear water cleaning pipe cleaning valve V10 remaining dirty
Object.
(5) the Quick Release valve deck of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, tidies up equipment, restores production in station.
(6) load wagon 16 pulls in skid slug catcher 17 in treating stations, sewage draining exit N4 and sewage disposal system in station
System connection, handles sewage, and corrosion inhibiter recovery port N3 is connect with corrosion inhibiter recovery system, recycles and to store corrosion inhibiter molten
Liquid.
1 corrosion inhibiter adding amount calculates
Formula (1) is shown in the calculating of corrosion inhibiter adding amount：
Q=K π D1·H·L+Q1
K in formula --- additional coefficient of discharge, generally 1.15；
Q --- corrosion inhibiter usage amount, L；
D1--- internal diameter of the pipeline, m；
H --- sustained release agent film forming thickness, mm generally take 0.076~0.125；
L --- pipeline total length, m；
Q1--- the threeway of branch pipeline section, sewage draining exit isometric(al), L on pipeline；
D2--- branch pipeline section internal diameter, m；
L2--- the length of branch pipeline section, m；
QOther--- the sum of other blowdown wastes, L.
Air volume calculation needed for 2
Total air inflow needed for pigging should be estimated before pigging, arrange tolerance traffic control properly.If dirt, hydrops in pipeline
More, depth displacement is larger, especially it should be noted that the deposit of tolerance.Generally with the total air inflow of following equation approximate estimation：
QAlways=Q1+Q2(2)
Q in formula1--- upward slope section consumes air inflow, m3；
Q2--- lower slope section consumes air inflow, m3；
QAlways--- total air inflow, m3；
F --- internal diameter of the pipeline cross-sectional area, m2；
L1--- pre- film ball upward slope range ability, km；
L2--- pre- film ball descending range ability, km；
--- average pressure after pre- film ball, MPa；
ρ --- corrosion inhibiter density, kg/m3；
G --- acceleration of gravity, m/s2；
H --- corrosion inhibiter liquid column length, m；
θ --- pipeline inclination angle.
The 3 pre- film ball speeds of service and run time calculate
V in formula --- the pre- theoretical instantaneous velocity of film ball operation, km/h；
Q --- instantaneous gas transmission flow, m3/d；
F --- internal diameter of the pipeline cross-sectional area, m2；
--- average pressure after pre- film ball, MPa；
ρ --- corrosion inhibiter density, kg/m3；
G --- acceleration of gravity, m/s2；
H --- corrosion inhibiter liquid column length, m；
θ --- pipeline inclination angle.
4 pre- film ball range ability estimations
General approximate formula is：
D in formula0=0.101325MPa, T0=293.15K；
L --- pre- film ball range ability, km；
Qb--- add up air inflow, m after sending out film ball pre-3；
F --- internal diameter of the pipeline cross-sectional area, m2；
--- average pressure after pre- film ball, MPa；
T --- gas mean temperature, K in pipeline section after pre- film ball；
Z --- the compressed coefficient under average pressure.
Claims (8)
1. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball, it is characterised in that：It is injected including vehicle-mounted corrosion inhibiter
System, pipe cleaning valve service system, pipe cleaning valve receive ball system and corrosion inhibiter recovery system, wherein：
The vehicle-mounted corrosion inhibiter injected system includes load wagon, corrosion inhibiter storage tank and electric submersible pump, in corrosion inhibiter tank top ozzle
Place is provided with ball valve V7；
The pipe cleaning valve service system includes the pipe cleaning valve V3 being arranged on outgoing line, and blowdown valve is provided on pipe cleaning valve V3
V6, pressure gauge G2 and safety vent valve V8, it is other on safety vent valve V8 to be connected to ball valve V4；Main line ball is arranged in the upstreams pipe cleaning valve V3
The downstream valve V1, pipe cleaning valve V3 is sequentially connected main line ball valve V2 and crosses ball indicator；
It includes being arranged in the pipe cleaning valve V10 on pipeline that enters the station that the pipe cleaning valve, which receives ball system, and blowdown is provided on pipe cleaning valve V10
Valve V14, safety vent valve V19 and pressure gauge G5, it is other on safety vent valve V19 to be connected to ball valve V21；The upstreams pipe cleaning valve V10 according to
It is secondary to connect ball indicator and main line ball valve V11, pipe cleaning valve V10 downstream connection ball valves V15, main line ball valve V12, ball valve V18 and
Main line ball valve V13；
The corrosion inhibiter recovery system includes load wagon and skid slug catcher, is set in skid slug catcher inlet
Place valve V16；Ball valve V17 is set at skid slug catcher gaseous phase outlet.
2. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Cyclone separator is set at skid slug catcher inner port, and liquid separation baffle is arranged in bottom, in liquid separation baffle bottom two
Corrosion inhibiter recycling ozzle and blowdown ozzle is respectively set in side, and top is provided with mist eliminator, inspection manhole and safety vent valve
V20, it is other on safety vent valve V20 to be connected to ball valve V22.
3. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
It is provided with pressure gauge G1 between pipe cleaning valve V3 and main line ball valve V1, pressure is provided between pipe cleaning valve V3 and main line ball valve V2
Table G3 and safety vent valve V9, it is other on safety vent valve V9 to be connected to ball valve V5.
4. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
It is connected with insulating joint after the ball indicator excessively in the downstreams pipe cleaning valve V3.
5. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
It is connected with insulating joint before the ball indicator excessively of the upstreams pipe cleaning valve V10.
6. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
It is provided with pressure gauge G4 after the main line ball valve V11 of the upstreams pipe cleaning valve V10.
7. a kind of pre- membranous system of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
It is provided with pressure gauge G6 after the main line ball valve V13 in the downstreams pipe cleaning valve V10.
8. a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball prefilming method, it is characterised in that：Including following content：
One, pipe cleaning valve service and corrosion inhibiter filling：
（1）Corrosion inhibitor solution has been configured in corrosion inhibiter storage tank according to adding amount needed for pre- film, and pigging is transported to by load wagon
At valve V3；
（2）Main line ball valve V1 is closed, pipe cleaning valve V3 is closed, opens ball valve V4, when pressure gauge G2 is shown as 0, opens pipe cleaning valve
The Quick Release valve deck of V3 is put into corrosion inhibiter fluid column leading edge control plug, closes the Quick Release valve deck of pipe cleaning valve V3 and open pipe cleaning valve V3；
（3）Ball valve V7 is connect with the blowdown valve V6 of pipe cleaning valve V3 by quick coupling, V6 and V7 is opened, by corrosion inhibitor solution plus
It notes in outgoing line, and corrosion inhibiter fluid column is formed in control plug rear end；
（4）After filling, V6, V7 are closed, electric submersible pump is closed, removes quick coupling；
（5）Pipe cleaning valve V3 is closed, surplus liquid in blowdown valve V6 discharge spherical cavities is opened, opens ball valve V4, wait for that pressure gauge G2 is shown
It is 0, opens the Quick Release valve deck of pipe cleaning valve V3, be packed into pre- film ball, close the Quick Release valve deck of pipe cleaning valve V3, opens main line ball valve V1,
Pipe cleaning valve V3 is opened, is released pre- film ball, corrosion inhibitor solution and control plug using air pressure in station；
（6）It has served as after ball indicator shows that pre- film ball is outbound, adjusting natural gas Outlet pressure, controlling the operation speed of pre- film ball
Degree, makes corrosion inhibiter full-section pipe-flow length and its residence time before pre- film ball meet pre- film requirement；
Two, pipe cleaning valve receives ball and corrosion inhibiter recycling：
（1）The ball valve V15 that the ball valve V16 of corrosion inhibiter recovery system is received by quick coupling with pipe cleaning valve to ball system is connected；It will
The ball valve V18 that the ball valve V17 of corrosion inhibiter recovery system receives ball system by quick coupling with pipe cleaning valve is connected, and closes main line ball valve
V12 opens ball valve V15, V16, V17, V18, and the fluids within pipes that make to enter the station are by skid slug catcher inflow downstream main line
Valve V13；
（2）It has served as after ball indicator sends out signal, confirming that corrosion inhibiter fluid column leading edge control plug in pipe cleaning valve V10, is closed
Pipe cleaning valve V10 opens ball valve V21 and blowdown valve V14, empties ball intracavity liquid by blowdown valve V14, waits for that pressure gauge G5 is shown as
When 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, takes out corrosion inhibiter fluid column leading edge control plug；
（3）The Quick Release valve deck of pipe cleaning valve V10 is sealed up, opens pipe cleaning valve V10, extra corrosion inhibiter and pipe inner product liquid stream enter skid section
Plug flow trap, corrosion inhibiter and sewage mixed solution fall to skid slug catcher bottom, and natural gas is by mist eliminator, ball
Valve V17 and ball valve V18 flow into the line downstream that enters the station；When pre- film ball enters in pipe cleaning valve V10, pipe cleaning valve V10 is closed, closes ball
Valve V15, V16, V17, V18 remove quick coupling, open main line ball valve V12；
（4）Ball valve V21 and blowdown valve V14 is opened, pigging valve insertion dirt is discharged by blowdown valve V14；When pressure gauge G5 is shown
When being 0, the Quick Release valve deck of pipe cleaning valve V10 is opened, pre- film ball is taken out, clear water is used in combination to clean pipe cleaning valve V10 residue dirts；It seals up
The Quick Release valve deck of pipe cleaning valve V10 opens pipe cleaning valve V10.
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| CN106890748B (en) * | 2017-04-19 | 2023-03-31 | 西南石油大学 | Film coating pipe cleaner with emergency starting system and using method thereof |
| CN107806847B (en) * | 2017-10-26 | 2020-07-07 | 西南石油大学 | Corrosion inhibitor pre-film thickness testing device and method |
| CN109013586B (en) * | 2018-08-29 | 2023-07-07 | 中国石油工程建设有限公司 | Segmented pipe cleaning system and method for gathering and conveying pipeline |
| CN110068368A (en) * | 2019-05-30 | 2019-07-30 | 汉正检测技术有限公司 | State comprehensive detection system in a kind of container and pipeline |
| CN112620016A (en) * | 2019-09-24 | 2021-04-09 | 中国石油化工股份有限公司 | Film coating device and method for sour gas pipeline of sulfur-containing gas field |
| CN114147011A (en) * | 2020-09-04 | 2022-03-08 | 中国石油天然气股份有限公司 | Blockage relieving method for salt crystallization blockage of natural gas pipeline |
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| US4045591A (en) * | 1974-07-19 | 1977-08-30 | Rodco, Inc. | Method of treating sucker rod |
| US6755916B1 (en) * | 2002-06-14 | 2004-06-29 | Tdw Delaware, Inc. | Method of dispensing inhibitor in a gas pipeline |
| US7827646B2 (en) * | 2008-02-08 | 2010-11-09 | Tdw Delaware, Inc. | Vortex inhibitor dispersal pig |
| CN102266838B (en) * | 2010-05-19 | 2016-04-20 | 中国石油化工集团公司 | A kind of gathering line corrosion inhibiter coating device |
| CN103194758B (en) * | 2013-02-01 | 2015-03-25 | 中国石油集团工程设计有限责任公司 | Forming device for gas production pipeline corrosion inhibitor slug pre-film |
| CN204042320U (en) * | 2014-08-27 | 2014-12-24 | 新兴重工湖北三六一一机械有限公司 | A kind of integrated form pipeline cleaning transmitter installation |
| CN204602546U (en) * | 2015-04-16 | 2015-09-02 | 中国石油化工股份有限公司 | The corrosion inhibiter coating pipe cleaning device of oil and gas pipes corrosion inhibiter applicator and oil and gas pipes |
| CN104831300B (en) * | 2015-04-20 | 2018-01-23 | 中国海洋石油集团有限公司 | A kind of pipeline targets descaling method |
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Effective date of registration: 20210210 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Address before: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. |