CN107219095A - Realize the sampler and sampling method of the anti-shearing sampling of Double-way sucking isothermal with pressure - Google Patents
Realize the sampler and sampling method of the anti-shearing sampling of Double-way sucking isothermal with pressure Download PDFInfo
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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Abstract
Sample devices technical field is conveyed the present invention relates to crude oil pipeline, more particularly to a kind of sampler and sampling method for realizing the anti-shearing sampling of Double-way sucking isothermal with pressure.In the sampler and sampling method of realizing the anti-shearing sampling of isothermal with pressure, piston is arranged in cavity, and two chambers will be divided into cavity, and two chambers difference is to be opened/closed to be connected with crude oil pipeline；Piston is repeatedly moved back and forth in cavity, drives the fluid in crude oil pipeline alternately to pass in and out two chambers, until the hydraulic pressure and liquid temperature in each chamber are equal with the hydraulic pressure and liquid temperature in crude oil pipeline respectively；This method is proposed based on above-mentioned sampler.Above-mentioned sampler and method can realize with pressure, isothermal and anti-shearing sampling simultaneously, and with from release, the crude oil that does not produce in the effect of waste oil, chamber can both take out for carrying out crude oil test, both reduce workload, and economic and environment-friendly.
Description
Technical field
Sample devices technical field is conveyed the present invention relates to crude oil pipeline, more particularly to one kind realizes that Double-way sucking is with pressure etc.
The sampler and sampling method of the anti-shearing sampling of temperature.
Background technology
Addition pour-point depressant modification is one of major technique of crude oil safety economy conveying.But, the modified effect of crude oil
Fruit especially its stability can't fully meet production requirement.The rheological characteristic of crude oil through pour-point depressant modification can be by
The influence of temperature change and shear action and deteriorate, the safe operation of pipeline may be injured by dealing with improperly.Therefore need timely
Oil sample is obtained from pipeline to carry out that oil sample must not be made to be subjected to any temperature change and shear in crude oil fluidity test, sampling process
Effect, the flowing property of crude oil in pipe can not truly be reflected by otherwise drawing oil sample.
When being sampled from crude oil pipeline, if sampler temperature and crude oil temperature in pipeline are inconsistent, into sampler
Oil sample temperature will change, no matter temperature be raised and lowered can on drawn oil sample mobility produce influence.From pipe with pressure
Road is sampled, if the pressure in sampler is different from the pressure in pipeline, the effect of pressure difference, and oil sample flows into inevitable during sampler
It can be sheared.
There is pressure difference inside and outside pipeline generally in sampling and do not reach the effect for eliminating shearing in current existing sampler；In order to
Pressure difference influence is eliminated, some samplers make crude oil pass through circulating pump in sampling process, but adds additional the pump excessively of oil sample
Shearing；Further, in order to prevent the influence in sampling process caused by temperature change, emptied again by being repeatedly first full of at present
Mode preheat (cold) sampler, but can not fundamentally accomplish that isothermal is sampled using the sampler, particularly be put in stock layout
The cavity emptied in null process can not touch oil sample in time, and (cold) part crossed of preheating originally again can be affected by environment and warm
Degree changes, and does not reach sampler preheating (cold) to the purpose for managing interior oil temperature, the oil sample discharged every time can only be as waste oil
Processing, that is, add workload, also uneconomical, environmental protection.In addition, sampler structure design is there is also defect, under sampler piston
Negative pressure can be produced in the cavity emptied during row oil extraction, not only causes piston to continue to move to become difficult, and easily cause piston
Seal between sampler inwall is damaged, and sampler is failed.Above crude oil pipeline sampler is to have partially removed sampling
Influence factor, the requirement of the anti-shearing sampling of isothermal with pressure is not reached, and the oil sample of taking-up can not truly reflect the reality of crude oil in pipe
Border flow behavior.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is to provide a kind of sampling for realizing the anti-shearing sampling of Double-way sucking isothermal with pressure
Device and sampling method, can realize sampling with pressure, isothermal sampling and anti-shearing sampling, and do not produce waste oil in sampling.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of sampler for realizing the anti-shearing sampling of isothermal with pressure,
Including cavity and piston, the piston is arranged in cavity, and two chambers, two chambers point will be divided into the cavity
It is not to be opened/closed to be connected with crude oil pipeline；The piston is repeatedly moved back and forth in cavity, drives the oil in the crude oil pipeline
Liquid alternately pass in and out two chambers, until each described chamber in hydraulic pressure and liquid temperature respectively with the liquid in the crude oil pipeline
Pressure is equal with liquid temperature.
Further, the hydraulic pressure and liquid temperature in each described chamber respectively with the hydraulic pressure and liquid temperature in the crude oil pipeline
It is equal, and any chamber and crude oil pipeline disconnect and when another is connected with crude oil pipeline, with the current location of piston
As position with pressure, pressure relieving position, the pressure relieving position and position with pressure are set in the chamber connected with the crude oil pipeline
Between it is spaced apart；The piston is moved to after pressure relieving position from position with pressure and stood, so that disconnected with the crude oil pipeline
The release in the quiescent state of the hydraulic pressure in chamber opened.
Further, in addition to piston rod and handwheel, the piston is connected by piston rod with handwheel, and the handwheel passes through
Rotational band piston bar is moved, to drive the piston to be moved in cavity.
Further, chamber lid is installed, the chamber is covered provided with pilot hole on the cavity, the pilot hole is used for work
The progress of the reciprocating movement sealing of stopper rod is oriented to.
Further, two chambers with crude oil pipeline respectively by connecting the first communicating pipe and the second communicating pipe.
Further, the first control valve and the second control are separately installed with first communicating pipe and the second communicating pipe
Valve.
Further, it is provided with air-intaking exhaust valve on the cavity.
Further, it is provided with sampling valve on the cavity.
Present invention also offers a kind of sampling method, wherein, the piston of sampler is arranged in cavity, by the cavity
Inside it is divided into two chambers, two chamber difference are to be opened/closed to be connected with crude oil pipeline；The piston is repeatedly past in cavity
Multiple motion, drives the fluid in the crude oil pipeline alternately to pass in and out two chambers, until the hydraulic pressure in each described chamber
It is equal with the hydraulic pressure and liquid temperature in the crude oil pipeline respectively with liquid temperature.
Further, the hydraulic pressure and liquid temperature in each described chamber respectively with the hydraulic pressure and liquid temperature in the crude oil pipeline
It is equal, and any chamber and crude oil pipeline disconnect and when another is connected with crude oil pipeline, with the current location of piston
As position with pressure, pressure relieving position, the pressure relieving position and position with pressure are set in the chamber connected with the crude oil pipeline
Between it is spaced apart；By the piston from position with pressure be moved to after pressure relieving position stand so that with the crude oil pipeline
Hydraulic pressure release in the quiescent state in the chamber of disconnection.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the advantages that：The present invention's realizes what the anti-shearing of isothermal with pressure was sampled
In sampler and sampling method, piston is arranged in cavity, and two chambers will be divided into cavity, and two chambers can be opened and closed respectively
Connected with crude oil pipeline；Piston is repeatedly moved back and forth in cavity, drives the fluid in crude oil pipeline alternately to pass in and out two chambers
Room, until the hydraulic pressure and liquid temperature in each chamber are equal with the hydraulic pressure and liquid temperature in crude oil pipeline respectively；Based on above-mentioned sampler
Propose this method.The sampler and method can realize sampling with pressure, isothermal sampling and anti-shearing sampling, sampling simultaneously
When sampling effect factor can be completely eliminated, reach the requirement of the anti-shearing sampling of isothermal with pressure, the oil sample of taking-up can truly reflect
The actual flow behavior of crude oil in pipe；In addition, the sampler has self-unloading pressure, the crude oil not produced in the effect of waste oil, chamber
Both it can take out for carrying out crude oil test, both reduce workload, but it is economic and environment-friendly.
Brief description of the drawings
Fig. 1 realizes the anti-structural representation for shearing the sampler sampled of isothermal with pressure for the embodiment of the present invention one；
Fig. 2 realizes the anti-structural representation for shearing the sampler sampled of isothermal with pressure for the embodiment of the present invention two.
Wherein, 1, chamber lid；2nd, air-intaking exhaust valve；3rd, piston；4th, cavity；5th, sampling valve；6th, the first control valve；7th, first connects
Siphunculus；8th, crude oil pipeline；9th, the second control valve；10th, the second communicating pipe；11st, pressure gauge；12nd, chamber；13rd, piston rod；14th, hand
Wheel.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.Term " on ",
" under ", "left", "right", " interior ", " outer ", " front ", the orientation of the instruction such as " rear " or position relationship be based on shown in the drawings
Orientation or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.This
Outside, term " first ", " second " etc. be only used for describe purpose, and it is not intended that indicate or imply relative importance, can not
It is interpreted as the limitation to laying order.
Embodiment one
As shown in figure 1, the sampler for realizing the anti-shearing sampling of isothermal with pressure that the present embodiment one is provided, the sampler can
Sampling with pressure, isothermal sampling and anti-shearing sampling are realized simultaneously, and sampling effect factor can be completely eliminated during sampling, reach
The requirement of the anti-shearing sampling of isothermal with pressure, the oil sample of taking-up can truly reflect the actual flow behavior of crude oil in pipe；In addition, this takes
The crude oil that sample utensil has from release, do not produce in the effect of waste oil, chamber 12 can be both taken out for carrying out crude oil test, both dropped
Low workload, but it is economic and environment-friendly.
Specifically, in sampler described in the present embodiment one, piston 3 is arranged in cavity 4, will be divided into two in cavity 4
Individual chamber 12, two chambers 12 distinguish it is to be opened/closed connected with crude oil pipeline, i.e. on off operating mode between cavity 4 and crude oil pipeline
It is controllable；When normally taking liquid, control piston 3 is repeatedly moved back and forth in cavity 4, by the alternately suction one of the fluid in crude oil pipeline
In individual chamber 12, and the fluid in another chamber 12 is drained back into crude oil pipeline again, so as to utilize the motion band of piston 3
Fluid in dynamic crude oil pipeline alternately turnover two chambers 12, until hydraulic pressure and liquid temperature in each chamber 12 respectively with crude oil pipe
Hydraulic pressure and liquid temperature in road is equal, so that the isobaric isothermal of the fluid in each chamber 12 in cavity 4, and and crude oil pipeline
The isobaric isothermal of interior fluid, realizes isobaric, the isothermal sampling out of crude oil pipeline；Meanwhile, lived with slow rational speed control
The motion of plug 3 so that flowing velocity when fluid passes in and out sampler by crude oil pipeline is slow enough, so that in sample introduction and sampling
The influence of shearing is avoided, anti-shearing sampling is realized.
In order to guarantee to move with slow rational speed control piston 3, preferably piston 3 passes through piston rod 13 and hand
Wheel 14 is connected, and handwheel 14 is moved by rotational band piston bar 13, is moved with band piston 3 in cavity 4；For the ease of fixation
Piston rod 13 and handwheel 14, are provided with chamber lid 1 on cavity 4, and chamber lid 1 is provided with pilot hole, and pilot hole is used for piston rod 13
The progress of reciprocating movement sealing be oriented to, specifically, sealing mechanism can be added between pilot hole and piston rod 13, such as seal
Pad, sealed bearings etc.；Piston rod 13 is arranged in pilot hole, so that piston rod 13 and the vertical setting of piston 3, when handwheel 14 is rotated
When, axial movement of the piston rod 13 along pilot hole, so as to be moved with piston 3 to one end of cavity 4, similarly rotates backward handwheel
When 14 with another end motion from piston 3 to cavity 4.Due to being driven using handwheel 14, the mobile comparison of piston 3 is slow, speed
It is controllable very slow, so as to ensure that the fluid flowing velocity in two chambers 12 is slowly controllable.
For the ease of the on off operating mode between control two chambers 12 and crude oil pipeline, two chambers 12 pass through first respectively
Communicating pipe 10 communicating pipe 7 and second is connected with crude oil pipeline, and first is separately installed with the first communicating pipe 7 and the second communicating pipe 10
The control valve 9 of control valve 6 and second.
For the ease of the position of piston 3 is placed in into original state (one end that piston 3 is moved to cavity 4), preferably cavity 4
On be provided with air-intaking exhaust valve 2, air-intaking exhaust valve 2 is preferably anti-negative pressure valve, chamber 12 and crude oil pipeline it is separated after, be
Prevent from producing negative pressure in chamber 12 or vacuum is stepped up, the valve can be automatically turned on, and destroyed vacuum effect, made the chamber 12 will not
The phenomenons such as flat, concave cleft are produced, with protection equipment safety；When piston 3 is moved to one end, the moving direction of piston 3 will be located at reverse
Chamber 12 and crude oil pipeline it is separated, and open air-intaking exhaust valve 2, gas is entered the chamber 12, to ensure piston 3
Normal movement.
Sampling valve 5 is provided with the crude oil after release, cavity 4 for the ease of being taken out out of sampler, when each chamber 12
Interior hydraulic pressure and liquid temperature are equal with the hydraulic pressure and liquid temperature in crude oil pipeline respectively, and any chamber 12 and crude oil pipeline disconnect,
And another with crude oil pipeline when connecting, using the current location of piston 3 as position with pressure, in the chamber connected with crude oil pipeline
Pressure relieving position is set in 12, and spaced apart between pressure relieving position and position with pressure, piston 3 is moved to release from position with pressure
Stood behind position, so that the hydraulic pressure release in the quiescent state in chamber 12, waits the fluid in the chamber 12 disconnected with crude oil pipeline 8
Hydraulic pressure unload and be depressed into after atmospheric pressure, open sampling valve 5, you can safety takes out the crude oil after release from chamber 12；In other words,
When the hydraulic pressure and liquid temperature of the fluid of the inner sealing of two chambers 12 are equal with the hydraulic pressure liquid temperature of the crude oil fluid in crude oil pipeline 8
When, then can be considered that fluid samples process to sampler from crude oil pipeline 8 and completed, now by one in two chambers 12 with
Crude oil pipeline 8 is connected, another keep with the off-state of crude oil pipeline 8, then by piston 3 from the position with pressure being currently located
Put, moved to the direction of chamber 12 connected with crude oil pipeline 8, because the chamber 12 at the mobile rear of piston 3 is kept and crude oil pipe
Road 8 disconnects, then expands the internal volume of the chamber 12 disconnected with crude oil pipeline 8 by the motion of piston 3, in follow-up standing process
In cause the chamber 12 in fluid voluntarily produce release effect.
For the ease of monitoring the oil liquid pressure in chamber 12 to be sampled, preferably in the chamber disconnected with crude oil pipeline 8
Set up between 12 and crude oil pipeline 8 in pressure gauge 11, the present embodiment one, first connected in the first control valve 6 with chamber 12
Pressure gauge 11 is set on communicating pipe 7, in order to monitor original oil liquid pressure state in chamber 12, so as to judge the self-unloading of oil sample
Pressure situation.
The preferred cavity 4 of the sampler is vertically arranged, and the motion of piston 3 is by the inside division of cavity 4 into two chambers up and down
12, the chamber of bottom by first communicating pipe 7 it is to be opened/closed connected with crude oil pipeline, the chamber on top passed through for the second communicating pipe 10
It is to be opened/closed to be connected with crude oil pipeline.It is preferred that the first communicating pipe 7 and the second communicating pipe 10 are connected to the upstream of crude oil pipeline
Side and downstream, it is more smoothly during fluid inflow cavity 4 to ensure, still, the second communicating pipe 10 and the connectivity part of crude oil pipeline
The oil in the first communicating pipe 7 and the upstream side or downstream of the connectivity part of crude oil pipeline, crude oil pipeline can also be arranged on
Liquid flow direction does not influence for sampling process；Chamber lid 1 is installed at the top of cavity 4, piston rod 13 is axially arranged along cavity 4,
Its one end is connected with piston 3, and the other end is connected vertically through chamber lid 1 with handwheel 14；The upper and lower ends of cavity 4 set air inlet respectively
Air bleeding valve 2 and sampling valve 5.
The sampler operation principle is as follows：By opening the first control valve 6 or the second control valve 9, oil stream is set to enter correspondence
Chamber 12 in, rotation hand wheel 14 makes piston 3 move reciprocatingly, and no matter piston 3 is moved to which direction, its move front and after
The chamber 12 of side is respectively at oil extraction and oil suction state so that a chamber 12 another chamber 12 row while fresh oil is sucked
Go out old oil.Moved back and forth for more than 3 times by piston, crude oil in sampler two way alternate suction pipeline so that sampler temperature with
Oil liquid temperature in crude oil pipeline is identical, reaches the purpose of isothermal sampling, and during each oil extraction, the oil of discharge is all
Pipeline is returned to, without being discharged to extraneous formation waste oil.Because two chambers 12 are disposed in parallel in cavity 4, then it can be considered as cavity 4
Two ends communicated with crude oil pipeline so that it is completely isobaric with crude oil pipeline in chamber 12, by controlling the speed of rotation hand wheel 14
Make during piston 3 is moved to the other end by one end of cavity 4, the fluid in crude oil pipeline slowly enters a chamber 12
Interior, then the process is entirely isobaric sample introduction.In addition, by self-unloading press operation during sampling, making hydraulic pressure first static release in chamber 12
Sampled again after to atmospheric pressure, so that in sample introduction and the whole influence for avoiding shearing of sampling, final realization is with pressure without waste oil
Isothermal is sampled from the anti-shearing of release.
Sampler maximum working pressure described in the present embodiment one is preferably 6MPa, and maximum operating temperature is preferably 70 DEG C,
The diameter of cavity 4 is preferably Φ 80, length preferably 160mm, and the diameter of piston 3 is preferably Φ 70, thickness preferably 40mm, sampler
Oil sample can once be accommodated for 500mL, the caliber of the first communicating pipe 7 and the second communicating pipe 10 use DN32, sampling valve 5 and cavity
The caliber of the connecting line between connecting line and air-intaking exhaust valve 2 and cavity 4 between 4 uses DN15.
Embodiment two
The structure and the basic phase of embodiment one of the sampler for realizing the anti-shearing sampling of isothermal with pressure described in the present embodiment two
Together, something in common is repeated no more, and difference is：As shown in Fig. 2 in sampler described in the present embodiment two, the level of cavity 4
Horizontal, piston 3 is in the interior axial bilateral reciprocation along cavity 4 of cavity 4, so that the inner sealing of cavity 4 is divided into left and right simultaneously
The two chambers 12 of row, two chambers 12 distinguish it is to be opened/closed connected with crude oil pipeline, by one in 4 or so two ends of cavity
Individual end-enclosed, another end installation cavity lid 1, axial direction of the piston rod 13 along cavity 4 is horizontally disposed with, and its one end connects with piston 3
Connect, the other end is connected through chamber lid 1 with handwheel 14, and perpendicular with chamber lid 1；The left and right ends of cavity 4 set air inlet to arrange respectively
Air valve 2 and sampling valve 5, according to the identical operation principle of embodiment one, the structure setting of the embodiment two can equally realize
Double-way sucking isothermal with pressure is from the anti-shearing of release without waste oil sampling process.
Embodiment three
Based on the sampler described in embodiment one or embodiment two, the present embodiment two proposes a kind of crude oil sampling method,
This method comprises the following steps：
Sampling procedure：The piston 3 of sampler is repeatedly moved back and forth in cavity 4, drives the fluid alternating in crude oil pipeline
Two chambers 12 are passed in and out, until the hydraulic pressure and liquid temperature in each chamber 12 are equal with the hydraulic pressure and liquid temperature in crude oil pipeline respectively.
From release step：Hydraulic pressure and liquid temperature in each chamber 12 respectively with the hydraulic pressure and liquid temperature phase in crude oil pipeline
Deng, and any chamber 12 is with when crude oil pipeline is disconnected and another is connected with crude oil pipeline, piston 3 is moved from position with pressure
Standing is moved to pressure relieving position, so that the hydraulic pressure release in the quiescent state in chamber 12.
This method can realize sampling with pressure, isothermal sampling and anti-shearing sampling simultaneously, can be completely eliminated during sampling
Sampling effect factor, reaches the requirement of the anti-shearing sampling of isothermal with pressure, and the oil sample of taking-up can truly reflect the reality of crude oil in pipe
Flow behavior；In addition, the sampler has self-unloading pressure, do not produce the effect of waste oil, the crude oil in chamber 12 can both take out use
In carrying out crude oil test, workload is both reduced, but it is economic and environment-friendly.
Example IV
The present embodiment four is with detailed operating process to the sampler and embodiment described in embodiment one or embodiment two
Sampling method described in three is described.Specifically, this method comprises the following steps：
S1, initialization step：The position of piston 3 is placed in original state, the original state need ensure the first control valve 6,
Second control valve 9, air-intaking exhaust valve 2 and sampling valve 5 are in closed mode, and piston 3 is located at bottom in cavity 4.
S2, sampling procedure, the sampling procedure further comprise following steps：
S21, pre- sampling procedure：The first control valve 6 and air-intaking exhaust valve 2 are separately turned on first, and quick rotation hand wheel 14 makes
Piston 3 is moved up, and the air in chamber 12 in front of the movement of piston 3 is constantly discharged to outside cavity 4 by air-intaking exhaust valve 2,
At the same time the crude oil fluid in crude oil pipeline is moved in the chamber 12 at rear through the sucker 3 of the first communicating pipe 7, i.e., in piston
3 when being moved up, and the gas in the chamber on top is discharged by air-intaking exhaust valve 2, and from crude oil pipeline suction in the chamber of bottom
And full of fluid；When being moved to the top of cavity 4 with piston 3, stop the rotation handwheel 14, and exhaust terminates, the bottom of piston 3
Chamber is full of by crude oil.
S22, sampling process step：Complete after pre- sampling procedure, close air-intaking exhaust valve 2, open the second control valve 9, instead
The quick rotation hand wheel 14 in direction, moves down piston 3, now crude oil out of crude oil pipeline through the sucker of the second communicating pipe 10
3 move in the chamber 12 at rears, i.e. the chamber on top, and the crude oil in chamber 12 in front of the at the same time movement of piston 3 is through first
Communicating pipe 7 is discharged into crude oil pipeline, realizes that a chamber 12 has fresh oil suction, while another chamber 12 has old oil discharge, inhale with
Two-way simultaneous progress is come, after piston 3 is moved to 4 bottom of cavity, the quick rotation hand wheel 14 of opposite direction, starts newly immediately
Two-way fast sucking, discharging process.Sampler is through repeated multiple times former by the first communicating pipe 7 and the two way alternate suction of the second communicating pipe 10
After crude oil fluid in oil-piping, the oil liquid temperature up and down in two chambers 12 is equal, and with the fluid temperature in crude oil pipeline
Degree is consistent, reaches the condition of isothermal sample introduction, and because two chambers 12 are inside and outside without gas connection, then the fluid in two chambers 12
Pressure is equal, and consistent with the oil liquid pressure in crude oil pipeline, realizes from the isobaric sampling in crude oil pipeline into sampler.
S3, anti-shearing sampling：Complete after above-mentioned sampling procedure, slow rotation hand wheel 14 moves up piston 3, it is former
Fluid in oil-piping slowly enters the chamber of bottom through the first communicating pipe 7, to avoid the shear inference that quick flowing is formed.
S4, from release step：When piston 3 is moved upward to poor a little arrival 4 the top of cavity, using the position to be with pressure
Position, using the top of cavity 4 as pressure relieving position, now closes the first control valve 6, seals oil sample and original in the chamber of bottom up for safekeeping
Crude oil in oil-piping is in equal temperature and pressure；Now rotation hand wheel 14 makes piston 3 continue up shifting from position with pressure
Move to pressure relieving position, due to entering the chamber of the bottom of piston 3 without crude oil, piston 3 is moved up so that sealing the pressure of crude oil up for safekeeping quiet
Voluntarily reduced under state, when the registration of pressure gauge 11 is 0MPa, represents that the hydraulic pressure in the chamber 12 is unloaded and be depressed into atmospheric pressure, now stop
Rotation hand wheel 14, closes the second control valve 9, possesses from the sampler condition that outwards equipressure is sampled.
S5, outside sampling procedure：Because sampling valve 5 is arranged on the bottom of cavity 4, and with the chamber company to be opened/closed of bottom
It is logical, sample bottle will be connect it is placed in sampling valve 5 and export, opens sampling valve 5, rotation hand wheel 14 makes piston 3 slowly move down, you can
The oil sample do not sheared to isothermal and isobaric, after piston 3 reaches 4 bottom of cavity, closes sampling valve 5 and air-intaking exhaust valve 2, complete
The overall process sampled into Double-way sucking isothermal with pressure from the anti-shearing of release without waste oil.
It should be noted that in above-mentioned steps S5, rotation hand wheel 14 makes during piston 3 moves down, with work
The movement of plug 3, moves in the chamber 12 at rear positioned at piston 3 and negative pressure occurs, in order to avoid occurring because suction function makes work
Plug 3 continues to move to situation that is difficult and damaging the seal between piston 3 and sampler inwall, should open air intake-exhaust
Valve 2 is that the chamber 12 at the movement of piston 3 rear fills into gas.
In summary, in sampler and sampling method that the anti-shearing sampling of isothermal with pressure is realized as described above, piston 3 is set
It is placed in cavity 4, will be divided into two chambers 12 in cavity 4, two chambers 12 are distinguished to be opened/closed is connected with crude oil pipeline；It is living
Plug 3 is repeatedly moved back and forth in cavity 4, drives the fluid in crude oil pipeline alternately to pass in and out two chambers 12, until each chamber
Hydraulic pressure and liquid temperature in 12 is equal with the hydraulic pressure and liquid temperature in crude oil pipeline respectively；This method is proposed based on above-mentioned sampler.
The sampler and method can realize sampling with pressure, isothermal sampling and anti-shearing sampling simultaneously, can be completely eliminated during sampling
Sampling effect factor, reaches the requirement of the anti-shearing sampling of isothermal with pressure, and the oil sample of taking-up can truly reflect the reality of crude oil in pipe
Flow behavior；In addition, the sampler has self-unloading pressure, do not produce the effect of waste oil, the crude oil in chamber 12 can both take out use
In carrying out crude oil test, workload is both reduced, but it is economic and environment-friendly.
Embodiments of the invention are provided for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be more preferably to illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (10)
1. a kind of sampler for realizing the anti-shearing sampling of isothermal with pressure, it is characterised in that including cavity and piston, the piston is set
It is placed in cavity, two chambers will be divided into the cavity, two chamber difference are to be opened/closed is connected with crude oil pipeline；
The piston is repeatedly moved back and forth in cavity, drives the fluid in the crude oil pipeline alternately to pass in and out two chambers, directly
It is equal with the hydraulic pressure and liquid temperature in the crude oil pipeline respectively to the hydraulic pressure and liquid temperature each described in chamber.
2. sampler according to claim 1, it is characterised in that hydraulic pressure and liquid temperature in each described chamber respectively with
Hydraulic pressure and liquid temperature in the crude oil pipeline is equal, and any chamber disconnects and another and crude oil with crude oil pipeline
During pipeline communication, using the current location of piston as position with pressure, release is set in the chamber connected with the crude oil pipeline
Position, it is spaced apart between the pressure relieving position and position with pressure；
The piston is moved to after pressure relieving position from position with pressure and stood, so that the liquid in the chamber disconnected with the crude oil pipeline
Press release in the quiescent state.
3. sampler according to claim 2, it is characterised in that also including piston rod and handwheel, the piston passes through work
Stopper rod is connected with handwheel, and the handwheel is moved by rotational band piston bar, to drive the piston to be moved in cavity.
4. sampler according to claim 3, it is characterised in that chamber lid is provided with the cavity, the chamber, which is covered, to be set
There is pilot hole, the pilot hole is used for being oriented to the reciprocating movement sealing of piston rod.
5. the sampler according to claim any one of 1-4, it is characterised in that two chambers connect by first respectively
Siphunculus and the second communicating pipe connect with crude oil pipeline.
6. sampler according to claim 5, it is characterised in that pacify respectively on first communicating pipe and the second communicating pipe
Equipped with the first control valve and the second control valve.
7. the sampler according to claim any one of 1-4, it is characterised in that be provided with air intake-exhaust on the cavity
Valve.
8. the sampler according to claim any one of 1-4, it is characterised in that be provided with sampling valve on the cavity.
9. a kind of sampling method, it is characterised in that the piston of sampler is arranged in cavity, will be divided into two in the cavity
Chamber, two chamber difference are to be opened/closed to be connected with crude oil pipeline；The piston is repeatedly moved back and forth in cavity, is driven
Fluid in the crude oil pipeline alternately passes in and out two chambers, until the hydraulic pressure and liquid temperature in each described chamber respectively with
Hydraulic pressure and liquid temperature in the crude oil pipeline is equal.
10. method according to claim 9, it is characterised in that hydraulic pressure and liquid temperature in each described chamber respectively with
Hydraulic pressure and liquid temperature in the crude oil pipeline is equal, and any chamber disconnects and another and crude oil with crude oil pipeline
During pipeline communication, using the current location of piston as position with pressure, release is set in the chamber connected with the crude oil pipeline
Position, it is spaced apart between the pressure relieving position and position with pressure；
The piston is moved to after pressure relieving position from position with pressure and stood, so that the hydraulic pressure in the chamber is unloaded in the quiescent state
Pressure.
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| CN108871864A (en) * | 2018-07-06 | 2018-11-23 | 山东理工大学 | A kind of Industrial Engineering liquid conveying pipe sampling apparatus |
| CN108939219A (en) * | 2018-07-06 | 2018-12-07 | 深圳市国赛生物技术有限公司 | Bubble removal method, bubble removal system and storage medium in plunger pump cavity |
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| CN114098895B (en) * | 2021-11-02 | 2024-04-16 | 中国人民解放军总医院第三医学中心 | Soft lens calculus irrigation sheath |
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Application publication date: 20170929 |