CN106523854A - Corrosion inhibitor single-ball pre-filming system and method of remote large-diameter gas collection pipeline - Google Patents
Corrosion inhibitor single-ball pre-filming system and method of remote large-diameter gas collection pipeline Download PDFInfo
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- CN106523854A CN106523854A CN201710011199.1A CN201710011199A CN106523854A CN 106523854 A CN106523854 A CN 106523854A CN 201710011199 A CN201710011199 A CN 201710011199A CN 106523854 A CN106523854 A CN 106523854A
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- pipe cleaning
- corrosion inhibiter
- cleaning valve
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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
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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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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses corrosion inhibitor single-ball pre-filming system and method of a remote large-diameter gas collection pipeline. The system comprises a vehicle-mounted corrosion inhibitor injection system, a pipe cleaning valve ball sending system, a pipe cleaning valve ball receiving system and a corrosion inhibitor recycling system. Compared with the prior art, the corrosion inhibitor single-ball pre-filming system and method of the remote large-diameter gas collection pipeline have the active effects that (1) a process is simple: gas pressure is controlled so that an operation speed of a pre-filming ball is controlled, and corrosion inhibitor pre-filming is carried out on the pipeline; in match with equipment, the operation is more convenient; the equipment can be repeatedly utilized in a plurality of stations, so that a lot of capital construction investment and operation management cost is saved; (2) the system and the method are safe and reliable: an operation flow of emptying with pressure, blowing off, gathering slug flow and the like is provided and safe and stable operation of a process flow and equipment in the station is guaranteed; and (3) the investment is saved: the system and the method depend on ball sending and receiving barrels or a pipe cleaning valve of the station and have high adaptability, and new large equipment does not need to be built so that the investment can be saved and the operation is convenient.
Description
Technical field
The invention belongs to Oil and Natural Gas Engineering technical field, 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 gas collector and delivery pipe High Speed Construction and its working pipeline it is aging, corrosive pipeline perforation and leakage fire
Accident happens occasionally.The pre- membrane technology of corrosion inhibiter as a kind of anti-corrosion method of easy for operation, economical and efficient, in collecting pipe
Application in system is extremely wide.Conventional plus agent method is that corrosion inhibiter is atomized into micron-sized drop using high pressure nozzle, and
Spray is to gas collection tube hub so as to airflow function to inner-walls of duct；But due to air velocity, pipe laying hypsography, delay
The impact of the factor such as erosion agent fogging degree and injection pressure, the anti-corrosion distance and overall corrosion mitigating effect of this charging method will all be received
To greatly restriction.Therefore, the pre- membrane technology of corrosion inhibiter also just arises at the historic moment, and is increasingly subject to pipeline operation management person and expert
The extensive concern of scholar.At present, the pre- membrane process of domestic and international corrosion inhibiter mainly has three kinds of pouring-in, injecting type and wiper to add work
Skill.Wherein, wiper is added technique and can effectively be combined with pipeline cleaning system, can disposably be reached pigging, be washed pipe, pre- film
Purpose, and corrosion inhibiter film forming is uniform, corrosion mitigating effect is notable；Therefore the method enjoys collecting pipe guardian to favor.
Now technique is added generally using the pre- membrane technology of double balls with wiper, i.e., first load two spherical pigs in service cylinder,
Carry quantitative corrosion inhibiter fluid column therebetween secretly, then spherical pig is promoted using pressure reduction before and after spherical pig, make spherical pig with fluid column in the lump
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, delays needed for its pre- film in the remote discharge of more than 50km more than DN250, length for caliber
The liquid column length of erosion agent is at least 70～80m, and general service cylinder obviously cannot carry such long fluid column secretly.Therefore, the pre- film of double balls
Technique is only applicable to the less collecting pipe of the shorter, caliber of distance.For this purpose, being directed to 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 process is simple, economical and efficient, strong adaptability,
The nimble corrosion inhibiter list ball prefilming method of operation and equipment.
The content of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball is pre-
Membranous system and method, are mainly used in the internal corrosion of the such pipeline of effective control, improve its service life, guarantee that operational management is pacified
Entirely.Its equipment is with the function such as corrosion inhibiter injection and corrosion inhibiter recovery；It is mainly used in 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, bag
Include vehicle-mounted corrosion inhibiter injected system, pipe cleaning valve service system, pipe cleaning valve and receive 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 with mouth；
The pipe cleaning valve service system includes the pipe cleaning valve V3 being arranged on outgoing line, the row of being provided with 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；Pipe cleaning valve V3 upstreams arrange dry
Thread ball valve V1, pipe cleaning valve V3 downstream is sequentially connected main line ball valve V2 and crosses ball indicator；
The pipe cleaning valve receives ball system to be included being arranged on the pipe cleaning valve V10 entered the station on pipeline, is provided with pipe cleaning valve V10
Blowoff 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 valve 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 arranges ball valve V16；At skid slug catcher gaseous phase outlet, ball valve V17 is set.
Present invention also offers a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball prefilming method, including following content：
First, 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 has been transported to by load wagon
At pipe cleaning valve V3；
(2) main line ball valve V1 is closed, closes pipe cleaning valve V3, open ball valve V4, when pressure gauge G2 is shown as 0, open clear
The Quick Release valve gap of pipe valve V3, is put into corrosion inhibiter fluid column leading edge control plug, closes the Quick Release valve gap of pipe cleaning valve V3 and open pipe cleaning valve
V3；
(3) ball valve V7 is connected by snap joint with the blowoff valve V6 of pipe cleaning valve V3, opens V6 and V7, corrosion inhibiter is molten
Liquid is filled in outgoing line, and forms corrosion inhibiter fluid column in control plug rear end；
(4) after filling is finished, V6, V7 are closed, closes electric submersible pump, remove snap joint；
(5) pipe cleaning valve V3 is closed, opens blowoff valve V6 and discharge surplus liquid in spherical cavity, open ball valve V4, treat pressure gauge G2
0 is shown as, the Quick Release valve gap of pipe cleaning valve V3 is opened, loads pre- film ball, close the Quick Release valve gap of pipe cleaning valve V3, open main line ball valve
V1, opens pipe cleaning valve V3, releases pre- film ball, corrosion inhibitor solution and control plug using air pressure in station；
(6) 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 the corrosion inhibiter full-section pipe-flow length before pre- film ball and its time of staying meet pre- film requirement；
2nd, pipe cleaning valve receives ball and corrosion inhibiter is reclaimed：
(1) the ball valve V16 and ball valve V17 of corrosion inhibiter recovery system are received into ball system with pipe cleaning valve respectively by snap joint
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 through skid slug catcher；
(2) served as after ball indicator sends signal, confirmed corrosion inhibiter fluid column leading edge control plug in pipe cleaning valve V10,
Pipe cleaning valve V10 is closed, ball valve V21 and blowoff valve V14 is opened, by blowoff valve V14 emptying ball intracavity liquids, treats that pressure gauge G5 shows
The Quick Release valve gap of pipe cleaning valve V10 when being shown as 0, is opened, corrosion inhibiter fluid column leading edge control plug is taken out；
(3) the Quick Release valve gap of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, hydrops flows into sled in unnecessary corrosion inhibiter and pipe
Dress slug catcher, corrosion inhibiter and sewage mixed solution fall to skid slug catcher bottom, and natural gas is through catching mist
Device, ball valve V17 and ball valve V18 flow into the line downstream that enters the station；When pre- film ball is in pipe cleaning valve V10, pipe cleaning valve V10 is closed,
Ball valve V15, V16, V17, V18 are closed, snap joint is removed, main line ball valve V12 is opened；
(4) ball valve V21 and blowoff valve V14 is opened, pigging valve insertion dirt is discharged by blowoff valve V14；As pressure gauge G5
The Quick Release valve gap of pipe cleaning valve V10 when being shown as 0, is opened, pre- film ball is taken out, and with the remaining dirts of clean water pipe cleaning valve V10；
The Quick Release valve gap 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 the existing pair of pre- membrane technology presence of ball
Topic, proposes a kind of new method for being adapted to the pre- film of remote heavy caliber air transmission pipeline corrosion inhibitor, enriches and expand the pre- membrane technology of corrosion inhibiter
And its range of application, concrete advantage shows as follows：
(1) process is simple：The present invention is by controlling gas pressure, and then controls the pre- film ball speed of service, so as to pipeline
Carry out the pre- film of corrosion inhibiter；Cooperation is equipped, more convenient to operate, and the equipment can be reused in multiple yards, saves a large amount of bases
Build investment and operational administrative expense.
(2) it is safe and reliable：The present invention possesses the operating processes such as emptying with pressure, blowdown and slug flow trapping, it is ensured that in yard
Technological process and equipment safety stable operation.
(3) investment reduction：Receiving ball tube or pipe cleaning valve that the present invention is carried by yard, strong adaptability, without the need for newly-built
Large-Scale Equipment, not only can investment reduction, be also convenient for operation.
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 is that corrosion inhibiter injects and pre- film ball transmission system, wherein：6 outgoing lines, 7 cross ball indicators, 8 insulating joints,
9 load wagons, 10 corrosion inhibiter storage tanks, 11 electric submersible pumps, 12 snap joints, 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 blowoff valves (often closing), V7 ball valves (often closing), V8～V9 peaces
Full atmospheric valve；In figure, AG and UG represents more than ground and below ground respectively.
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 points of liquid baffle plates, 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 line ball valves (normally opened), V14
Blowoff valve, V15～V18 ball valves, V19～V20 safety vent valves, V21～V22 ball valves (often closing)；In figure, AG and UG is represented respectively
More than ground and below ground.
Specific embodiment
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 that present system is constituted and connected mode below in conjunction with the accompanying drawings.
Fig. 2 is that corrosion inhibiter injects and pre- film ball transmission system, 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 snap joint
Into；Corrosion inhibiter tank 10 is directly anchored on load wagon 9 by saddle；10 bottom of corrosion inhibiter storage tank sets sewage draining exit N1, and top sets pipe
Mouth N2；Ball valve V7 can be connected with the blowoff valve V6 of pipe cleaning valve V3 by snap joint 12；Electric submersible pump 11 can be stretched into 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, blowoff 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 connection of pipe cleaning valve V3 upstreams main line ball valve V1 and pressure gauge G1, 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；Connect blowoff valve V6, pressure gauge G2 and peace on pipe cleaning valve V3
Full atmospheric valve V8；It is connected on by ball valve V4 on safety vent valve V8, is connected on by ball valve V5 on safety vent valve V9.
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, snap joint 21 and snap joint
Into；Skid slug catcher 17 is fixed on load wagon 16 by saddle；17 Inlet ball valve V16 of skid slug catcher can
To be connected by snap joint 21 and ball valve V15；17 gaseous phase outlet ball valve V17 of skid slug catcher passes through snap joint 22
Connect with ball valve V18；Skid slug catcher inner port arranges cyclone separator 18, and bottom arranges a point liquid baffle plate 19, point
Bottom on the left of liquid baffle plate 19 arranges corrosion inhibiter and reclaims ozzle N3, and the bottom on the right side of point liquid baffle plate 19 arranges blowdown ozzle N4；Sled
Mist eliminator 20, inspection manhole N5 and safety vent valve V20 are set at the top of dress slug catcher 17, by ball valve V22, safety is connected on
On atmospheric valve V20.
Pipe cleaning valve receives ball system by the pipeline 13 that enters the station, excessively insulating joint 14, ball indicator 15, pipe cleaning valve V10, main line ball valve
V11～V13, blowoff 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 is arranged in and enters the station on pipeline 13, and pipe cleaning valve V10 upstreams connect insulating joint 14, cross ball indicator 15, main line ball valve
V11 and pressure gauge G4, pipe cleaning valve V10 downstream connection ball valve V15, main line ball valve V12, ball valve V18, main line ball valve V13 and pressure
Table G6；Connect blowoff valve V14, safety vent valve V19, pressure gauge G5 on pipe cleaning valve V10；Safety vent valve is connected on by ball valve V21
V19。
The Main Function and operation principle of each system of the invention are illustrated below.
As shown in figure 1, the pre- film of corrosion inhibiter list ball sends the control of corrosion inhibiter fluid column leading edge using the pipe cleaning valve V3 of service system
Plug 4, pre-processes to inner-walls of duct, removes the impurity such as hydrops in inwall iron rust and pipe, while ensureing that corrosion inhibiter fluid column is in all the time
Full pipe condition.
Quantitative corrosion inhibitor solution 3 is pumped into collecting pipe using vehicle-mounted corrosion inhibiter injected system by the pre- film of corrosion inhibiter list ball.
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 reclaims unnecessary delaying 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 process and reused.
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 in full packages
The corrosion inhibitor solution of stream meets pre- film requirement in the time of staying of pipeline section.
Pipe cleaning valve is served a ball and corrosion inhibiter fills flow process 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 moved to by load wagon 9 serve a ball at system；
(2) main line ball valve V1 is closed, closes pipe cleaning valve V3, open ball valve V4, treated that pressure gauge G2 is shown as 0, open pigging
The Quick Release valve gap of valve V3, is put into corrosion inhibiter fluid column leading edge control plug 4, closes the Quick Release valve gap of pipe cleaning valve V3, open pipe cleaning valve V3.
(3) the pump discharge ball valve V7 of car-mounted device is connected by snap joint 12 with the blowoff valve V6 of pipe cleaning valve V3, is beaten
Opening ball valve V6 and V7, open electric submersible pump 11, the corrosion inhibitor solution in storage tank 10 are filled in outgoing line 6, and in control plug 4
Rear end forms corrosion inhibiter fluid column.
(4), after injection is finished, ball valve V6, V7 are closed successively, electric submersible pump 11 is closed, is removed snap joint 12.
(5) pipe cleaning valve V3 is closed, opens blowoff valve V6 and discharge surplus liquid in spherical cavity, open ball valve V4, treat pressure gauge G2
0 is shown as, the Quick Release valve gap of pipe cleaning valve V3 is opened, loads pre- film ball 2, close the Quick Release valve gap of pipe cleaning valve V3, open main line ball
Valve V1, opens pipe cleaning valve V3, pushes 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) 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, and before making pre- film ball 2, corrosion inhibiter full-section pipe-flow length and its time of staying expire
The pre- film of foot is required.
Pipe cleaning valve receives ball and corrosion inhibiter recovery process as shown in figure 3, its specific implementation step is as follows：
(1) snap joint 21 and 22 of equipment is connected with ball valve V15 and ball valve V18 respectively, closes main line ball valve
V12, opens valve V15, V16, V17, V18；Fluid is entered the station in pipeline 13 now under the inflow of skid slug catcher 17
Trip main line valve V13.
(2) served as after ball indicator 15 sends 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 blowoff valve V14 is opened, by blowoff valve V14 emptying ball intracavity liquids, is treated pressure gauge
The Quick Release valve gap of pipe cleaning valve V10 when G5 is shown as 0, is opened, corrosion inhibiter fluid column leading edge control plug 4 is taken out.
(3) the Quick Release valve gap of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, hydrops flows into sled in unnecessary corrosion inhibiter and pipe
Dress slug catcher 17, corrosion inhibitor solution is through 18 pre-separation of cyclone separator；Corrosion inhibiter and sewage mixed solution fall to
17 bottom of skid slug catcher, natural gas flow into 13 downstream of pipeline of entering the station through mist eliminator 20, ball valve V17 and ball valve V18；
When pre- film ball 2 is in pipe cleaning valve V10, pipe cleaning valve V10 is closed, close ball valve V15, V16, V17, V18, remove snap joint
21 and 22, open main line ball valve V12.
(4) ball valve V21 and blowoff valve V14 is opened, pigging valve insertion dirt is discharged by blowoff valve V14；As pressure gauge G5
The Quick Release valve gap of pipe cleaning valve V10 when being shown as 0, is opened, pre- film ball 2 is taken out, and it is remaining dirty with clean water pipe cleaning valve V10
Thing.
(5) the Quick Release valve gap of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, equipment is tidied up, recovers production in station.
(6) load wagon 16 draws in skid slug catcher 17 in treating stations, sewage disposal system in sewage draining exit N4 and station
System connection, is processed to sewage, and corrosion inhibiter recovery port N3 is connected with corrosion inhibiter recovery system, reclaims and to store corrosion inhibiter molten
Liquid.
1 corrosion inhibiter adding amount is calculated
Formula (1) is shown in the calculating of corrosion inhibiter adding amount：
Q=K π D1·H·L+Q1
The additional coefficient of discharges of K in formula, generally 1.15；
Q corrosion inhibiter usage amounts, L；
D1Internal diameter of the pipeline, m；
H sustained release agent film forming thickness, mm typically take 0.076～0.125；
L pipeline total lengths, m；
Q1Pipeline section threeway, sewage draining exit isometric(al), L on pipeline；
D2Prop up pipeline section internal diameter, m；
L2Prop up the length of pipeline section, m；
QOtherOther blowdown waste sums, L.
Air volume calculation needed for 2
Total air inflow needed for pigging should be estimated before pigging, tolerance traffic control is arranged properly.If dirt, hydrops in pipeline
Many, depth displacement is larger, especially it should be noted that the deposit of tolerance.Typically with the total air inflow of following equation approximate estimation：
QAlways=Q1+Q2(2)
Q in formula1Upward slope section consumes air inflow, m3；
Q2Lower slope section consumes air inflow, m3；
QAlwaysTotal air inflow, m3；
F internal diameter of the pipeline cross-sectional areas, m2；
L1Pre- film ball upward slope range ability, km；
L2Pre- 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 lengths, m；
θ pipeline inclination angles.
The 3 pre- film ball speeds of service and run time are calculated
The theoretical instantaneous velocity of the pre- film ball operations of v, km/h in formula；
The instantaneous gas transmission flows of Q, m3/d；
F internal diameter of the pipeline cross-sectional areas, 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 lengths, m；
θ pipeline inclination angles.
4 pre- film ball range ability estimations
General approximate formula is：
D in formula0=0.101325MPa, T0=293.15K；
The pre- film ball range abilities of L, km；
QbAdd up air inflow, m after sending out film ball pre-3；
F internal diameter of the pipeline cross-sectional areas, m2；
Average pressure after pre- film ball, MPa；
Gas mean temperature, K in pipeline section after the pre- film balls of T；
The compressed coefficients of the Z under average pressure.
Claims (8)
1. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball, it is characterised in that：Inject 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 tank and electric submersible pump, at corrosion inhibiter tank top ozzle
It is provided with ball valve V7；
The pipe cleaning valve service system includes the pipe cleaning valve V3 being arranged on outgoing line, on pipe cleaning valve V3 is provided with blowoff 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；Pipe cleaning valve V3 upstreams arrange main line ball
Valve V1, pipe cleaning valve V3 downstream is sequentially connected main line ball valve V2 and crosses ball indicator；
The pipe cleaning valve receives ball system to be included being arranged on the pipe cleaning valve V10 entered the station on pipeline, on pipe cleaning valve V10 is provided with 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；Pipe cleaning valve V10 upstreams according to
It is secondary to connect ball indicator and main line ball valve V11, pipe cleaning valve V10 downstream connection ball valve 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, sets in skid slug catcher porch
Place valve V16；At skid slug catcher gaseous phase outlet, ball valve V17 is set.
2. the pre- membranous system of a kind 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 bottom arranges a point liquid baffle plate, is being divided to liquid baffle bottom two
Side is respectively provided with corrosion inhibiter and reclaims ozzle and blowdown ozzle, 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. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Pressure gauge G1 is provided 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. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Insulating joint is connected with after the ball indicator excessively in pipe cleaning valve V3 downstreams.
5. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Insulating joint is connected with before the ball indicator excessively of pipe cleaning valve V10 upstreams.
6. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Pressure gauge G4 is provided with after the main line ball valve V11 of pipe cleaning valve V10 upstreams.
7. the pre- membranous system of a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball according to claim 1, it is characterised in that：
Pressure gauge G6 is provided with after the main line ball valve V13 in pipe cleaning valve V10 downstreams.
8. a kind of remote heavy caliber collecting pipe corrosion inhibiter list ball prefilming method, it is characterised in that：Including following content：
First, 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 has been transported to by load wagon
At valve V3；
(2) main line ball valve V1 is closed, closes pipe cleaning valve V3, open ball valve V4, when pressure gauge G2 is shown as 0, open pipe cleaning valve
The Quick Release valve gap of V3, is put into corrosion inhibiter fluid column leading edge control plug, closes the Quick Release valve gap of pipe cleaning valve V3 and open pipe cleaning valve V3；
(3) ball valve V7 is connected by snap joint with the blowoff valve V6 of pipe cleaning valve V3, opens V6 and V7, by corrosion inhibitor solution plus
Note in outgoing line, and corrosion inhibiter fluid column is formed in control plug rear end；
(4) after filling is finished, V6, V7 are closed, closes electric submersible pump, remove snap joint；
(5) pipe cleaning valve V3 is closed, opens blowoff valve V6 and discharge surplus liquid in spherical cavity, open ball valve V4, treat that pressure gauge G2 shows
The Quick Release valve gap of pipe cleaning valve V3 for 0, is opened, loads pre- film ball, close the Quick Release valve gap of pipe cleaning valve V3, open main line ball valve V1,
Pipe cleaning valve V3 is opened, pre- film ball, corrosion inhibitor solution and control plug is released using air pressure in station；
(6) 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 the corrosion inhibiter full-section pipe-flow length before pre- film ball and its time of staying meet pre- film requirement；
2nd, pipe cleaning valve receives ball and corrosion inhibiter is reclaimed：
(1) the ball valve V16 and ball valve V17 of corrosion inhibiter recovery system are received with pipe cleaning valve respectively the ball of ball system by snap joint
Valve V15 is connected with ball valve V18, closes main line ball valve V12, opens ball valve V15, V16, V17, V18, makes the fluids within pipes that enter the station
Downstream main line valve V13 is flowed into through skid slug catcher；
(2) served as after ball indicator sends signal, confirmed 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 blowoff valve V14, by blowoff valve V14 emptying ball intracavity liquids, treats that pressure gauge G5 is shown as
The Quick Release valve gap of pipe cleaning valve V10 when 0, is opened, corrosion inhibiter fluid column leading edge control plug is taken out；
(3) the Quick Release valve gap of pipe cleaning valve V10 is sealed up, pipe cleaning valve V10 is opened, hydrops flows into skid section in unnecessary corrosion inhibiter and pipe
Plug flow trap, corrosion inhibiter and sewage mixed solution fall to skid slug catcher bottom, and natural gas is through mist eliminator, ball
Valve V17 and ball valve V18 flows into the line downstream that enters the station；When pre- film ball is in pipe cleaning valve V10, pipe cleaning valve V10 is closed, close ball
Valve V15, V16, V17, V18, remove snap joint, open main line ball valve V12；
(4) ball valve V21 and blowoff valve V14 is opened, pigging valve insertion dirt is discharged by blowoff valve V14；When pressure gauge G5 shows
For 0 when, open the Quick Release valve gap of pipe cleaning valve V10, pre- film ball taken out, and with the remaining dirts of clean water pipe cleaning valve V10；Seal up
The Quick Release valve gap of pipe cleaning valve V10, opens pipe cleaning valve V10.
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| CN107806847A (en) * | 2017-10-26 | 2018-03-16 | 西南石油大学 | A kind of pre- film thickness test device of corrosion inhibiter and method |
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| 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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