CN103603660B - A kind of steam sampling system and method - Google Patents
A kind of steam sampling system and method Download PDFInfo
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- CN103603660B CN103603660B CN201310485122.XA CN201310485122A CN103603660B CN 103603660 B CN103603660 B CN 103603660B CN 201310485122 A CN201310485122 A CN 201310485122A CN 103603660 B CN103603660 B CN 103603660B
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Abstract
The invention discloses a kind of steam sampling system, it comprises: water separator, sampling pipe, relief valve, sample heat sink and sample tap.Described water separator comprises rotational flow separation room, dilatation separation chamber, central passage, obstruct separate sheet and collecting chamber.The present invention is also corresponding provides a kind of steam sampling method.Utilize described sampling method to realize the real-time separation of down-hole HTHP wet saturated steam by described sampler, obtain the condensed water sample after decrease temperature and pressure, for on-line measurement provides real-time sample.
Description
Technical field
The present invention relates to field of heavy oil thermal recovery, particularly a kind of steam sampling system and method.
Background technology
Viscous crude refers to that viscosity of crude is under formation conditions greater than 50mPa.s(milli handkerchief second) or reservoir temperature under degassed crude viscosity be greater than the high viscosity heavy crude of 100mPa.s.In the oil exploitation in oil field, because viscous crude has special high viscosity and the characteristic of high-solidification point, poor fluidity in reservoir and pit shaft, conventional mining yield is low, namely cannot ensure normal economic flow rate.In order to ensure rational recovery ratio, recover the oil often through the former oil viscosity of reduction.
The Technology of Heavy Oil Recovery of the prior art comprises thermal recovery technology, namely applies steam injection equipment (a kind of wet steam generator), first water is converted into the wet saturated steam that the mass dryness fraction content of vapour (in the steam) is 75%.Described steam injection equipment is by under the wet saturated steam Injection Well of described 75% mass dryness fraction afterwards, by the transmission realization heating to oil reservoir of heat in wet saturated steam to oil reservoir, thus reduces viscosity of crude, and then improves recovery ratio.Described thermal recovery technical matters mainly comprises steam soak, steam flooding, SAGD(steam assisted gravity unload oil tech) three large techniques.
Steam injection equipment outlet steam quality be the wet saturated steam of 75% after terrestrial transmission, pit shaft transmission, due to the loss in transmitting procedure, arrive steam quality behind down-hole and be only 30%-40%.And steam soak, steam flooding and the SAGD in aforementioned thermal recovery technical matters require respectively >=50%, >=shaft bottom the steam quality of 50% and >=70%.Therefore after arriving down-hole, steam quality is only the requirement that 30%-40% wet saturated steam obviously cannot meet thermal recovery technical matters.Particularly the Liaohe River, Xinjiang are all heavy crude heat extractions at present, mainly based on SAGD development scheme, if down-hole mass dryness fraction can not reach requirement, then cannot normally recover the oil.Therefore often need the steam quality by controlling the outlet of steam injection equipment, the steam quality such as improving this steaming plant exit can meet technological requirement to make the mass dryness fraction reaching shaft bottom after the loss of transmitting procedure.And how accurately steam quality at the bottom of measuring well is the important prerequisite realizing steam quality at the bottom of control well.
The sampling of currently available technology underground steam is main adopts high temperature and high pressure steam condensed water under sample apparatus sampled well, then by materials to hold and bring back to laboratory in a reservoir, by labor measurement basicity, draw underground steam mass dryness fraction value.Described basicity to refer in water contained can with the total material of strong acid generation neutralization, the total amount of the material of H+ can be accepted.In water, described material mainly strong acid weak base salt.Described steam quality value is numerically inversely proportional to the concentration of salt.
But said determination mode is not real-time on-line period, but need by sample apparatus, the sample collected to be taken ground from down-hole, then sample is taken out.It is originally the state that gas-liquid two-phase coexists in sample apparatus, originally the wet saturated steam of the HTHP in sample apparatus is present in the process from down-hole to ground in the process of materialsing, water sample can be entered due to condensation, thus have diluting effect to former water sample.Due to described diluting effect, salt concentration in condensation water sample water is diminished, for materials that to detect the steam quality value that obtains also just large than actual value, therefore got steam sample fully can not represent actual steam quality, also just cannot provide desirable sample for the accurate measurement of steam quality.
Summary of the invention
The object of this invention is to provide a kind of steam sampling system and method, enable got steam sample fully represent steam quality, thus provide desirable sample for the accurate measurement of steam quality.
For achieving the above object, technical scheme provided by the invention is as described below:
A kind of steam sampling system, comprise water separator, sampling pipe, relief valve, sample heat sink, sample tap, wherein, water separator, is positioned at oil pipe, for carrying out carbonated drink separation to the underground steam injected; Sampling pipe, for connecting water separator and relief valve, the current flowline guiding described water separator to be separated is to relief valve; Relief valve, for reducing pressure to the described Separation of Water flowed into from sampling pipe; Sample heat sink, for lowering the temperature through the post-decompression Separation of Water of relief valve to described; Sample tap, for the outlet as the Separation of Water after described cooling; Described water separator comprises rotational flow separation room, dilatation separation chamber, central passage, obstruct separate sheet and collecting chamber, wherein, rotational flow separation room is positioned at the top of described water separator, the upper surface of described rotational flow separation room is provided with opening and is communicated with oil pipe, lower surface is provided with opening and is communicated with dilatation separation chamber, inside is provided with rotational flow separation sheet, and described rotational flow separation room is for realizing the rotational flow separation of carbonated drink; Dilatation separation chamber is positioned at the middle part of described water separator, and described dilatation separation chamber is all communicated with described rotational flow separation room, central passage, collecting chamber, and described dilatation separation chamber is separated for the dilatation realizing carbonated drink; Central passage is positioned at the middle and lower part of described water separator, and distribute along the central axis of described water separator, described central passage is equal opening up and down, and upper surface is communicated with dilatation separation chamber, lower surface is communicated with oil pipe, and described central passage is used for the circulation of steam; Intercept separate sheet to be fixedly connected with described central passage outer wall, leave gap with water separator inwall, described obstruct separate sheet is separated for the obstruct realizing carbonated drink; Collecting chamber is positioned at the bottom of described water separator, and be positioned at beyond described central passage, intercept below separate sheet, described collecting chamber is for collecting the water after separation.
In a preferred embodiment, described collecting chamber from bottom surface upwards sectional area increase progressively.
In a preferred embodiment, described collecting chamber is also being provided with hole with central passage intersection.
In a preferred embodiment, the described sampling pipe for connecting water separator is at least 2.
In a preferred embodiment, described sampling pipe water sucting port is tubaeform.
In a preferred embodiment, described obstruct separate sheet is outward-dipping by center.
A kind of steam sampling method, its concrete steps are:
S1: by good for described steam sampling Operation system setting water separator, relief valve, sample heat sink and sample tap;
S2: tested steam is injected oil pipe by little four-way, injects water separator by oil pipe;
S3: the tested steam entering water separator is carried out carbonated drink separation;
S4: utilize the pressure differential in sampling pipe to derive in water separator the water sample after being separated;
S5: the water sample of derivation is introduced relief valve and carries out reduced pressure treatment;
S6: post-decompression water sample is introduced heat sink and carry out cooling process;
S7: taken out from sample tap by the water sample after described cooling, sampling terminates.
In a preferred embodiment, the carbonated drink described in S3 separation specifically comprises rotational flow separation, dilatation is separated and is separated with obstruct.
In a preferred embodiment, the cooling process described in S6 is specially is down to less than 40 DEG C by described post-decompression water sample through heat sink.
Beneficial effect: by using described sampler and adopting described sampling method, carries out decrease temperature and pressure to sample in the process of sampling, and what obtain is the condensed water sample of lower less than 40 DEG C of normal pressure.Enter sample after the wet saturated steam condensation compared with prior art avoided in water separator becomes water, to the situation that sample dilutes, enable acquired steam sample fully represent the mass dryness fraction quality of steam.The sample that sampler of the present invention obtains in addition directly can lead in measurement mechanism by flexible pipe and go to test, and need not by deposit in intermediate receptacle take to laboratory go survey, such measurement just not by the restriction of time, can obtain up-to-date steam quality value at any time quickly and accurately.
Accompanying drawing explanation
Fig. 1 is steam sampling system schematic in first embodiment of the invention;
Fig. 2 is water separator structural representation in first embodiment of the invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated, be to be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen in the application's claims limited range.
First embodiment of the invention as shown in Figure 1, is a kind of steam sampling system.Described steam sampling system comprises water separator 2, sampling pipe 3, relief valve 4, first heat sink 5, second heat sink 6 and sample tap 7.The water separator 2 that steam sampling system of the present invention comprises, relief valve 4, first heat sink 5, second heat sink 6 and sample tap 7 are successively set on the pipeline that sampling pipe 3 passes through.Steam sampling system of the present invention is installed in systems in which in whole steam injection process.
Functions is as follows:
Water separator 2: for carrying out carbonated drink separation to the underground steam injected;
Sampling pipe 3: the current flowline being mainly used in the separation of described water separator 2, to relief valve, secondly also plays the effect of water separator 2 and relief valve 4.
Relief valve 4: be mainly used in reducing pressure to the described Separation of Water flowed into from sampling pipe 3, secondly also can by controlling the break-make of Separation of Water to the opening and closing of relief valve 4.
First heat sink 5: for being cooled to 100 DEG C-120 DEG C to described after relief valve 4 reduces pressure.
Second heat sink 6: be again cooled to less than 40 DEG C for the Separation of Water obtained of lowering the temperature through the first heat sink 5.
Sample tap 7: for the outlet as the Separation of Water after described cooling.
On ground less than 10, described water separator 2 is arranged in oil pipe 1, and leaves gap with oil pipe 1.Described water separator 2 inside is provided with sampling pipe 3, and described sampling pipe 3 inside arranges internal thread 31, is threaded connection with the sampling pipe 3 on top.During use, described in first connect inside and outside the sampling pipe 3 that is threaded connection, then under lower going-into-well.On ground more than 10, described sampling pipe 3, connecting one end of relief valve 4, can arrange flange, for connecting relief valve 4.Flange joint can be adopted successively between described relief valve 4 and the first heat sink 5, second heat sink 6.Described sample tap 7 place can connect a flexible pipe, so that the device causing measurement steam quality that the condensed water obtained sampling is flexible, measures in real time.
Fig. 2 is water separator 2 structural representation.Described water separator 2 monnolithic case can be cylindrical shape.Described water separator with the end face of central axis upright on all have and export and entrance.Described water separator 2 internal main will comprise rotational flow separation room 21, dilatation separation chamber 22, central passage 23, intercept separate sheet 24 and collecting chamber 25.
Described rotational flow separation room 21 can be positioned at the top of water separator 2.Described rotational flow separation room 21 entirety can be cylindrical shape, and the upper surface of described rotational flow separation room 21 is provided with opening and is communicated with oil pipe 1, and lower surface is provided with opening and is communicated with dilatation separation chamber 22.The opening of upper and lower end face, described rotational flow separation room 21 all can opened round uncovered.Rotational flow separation sheet 211 is provided with in described rotational flow separation room 21.Described rotational flow separation room 21 can be used for realizing carbonated drink rotational flow separation.
Described dilatation separation chamber 22 can be positioned at the middle part of water separator 2.Described dilatation separation chamber 22 is the space that rotating separation room less than 21 intercepts beyond separate sheet more than 24 central passage 23.Described dilatation separation chamber 22 is all communicated with other each rooms.The upper surface of described dilatation separation chamber 22 is communicated with lower surface, described rotational flow separation room 21; Lower surface, described dilatation separation chamber 22 is connected with the gap left by intercepting separate sheet 24 and water separator 2 inwall between collecting chamber 25; Be communicated with central passage 23 in the middle of described dilatation separation chamber 22; The dilatation that described dilatation separation chamber 22 can be used for realizing carbonated drink is separated.
Described central passage 23 is positioned at the middle and lower part of described water separator 2, can distribute along the central axis of described water separator 2.Described central passage 23 upper surface is communicated with dilatation separation chamber 22, and lower surface is communicated with oil pipe 1.Described central passage 23 is also the cylindrical shape of upper lower open mouth, for the circulation of wet saturated steam.
Described obstruct separate sheet 24 can be positioned at the periphery of central passage 23, can for welding with central passage 23 outer wall.Described obstruct separate sheet 24 entirety can be an annulus thin slice.Described obstruct separate sheet 24 is arranged to the structure tilted from center to periphery, is convenient to isolated water and flows down smoothly.Described obstruct separate sheet is used for realizing carbonated drink obstruct and is separated.
Described collecting chamber 25 is positioned at the bottom of described water separator 2, is positioned at beyond described central passage 23, intercepts separate sheet less than 24.Described collecting chamber 25 is separated for collecting in whole water separator 2 water obtained.Can be taper shape bottom described collecting chamber 25, also can be circular arc or from described collecting chamber 25 bottom surface up sectional area become other large shapes gradually, described shape is conducive to the quick rising of water level in collecting chamber 25.Described collecting chamber 25 is provided with hole 231, for the height of water level in domination set hydroecium 25 with central passage 23 intersection.When water level arrives the height in hole 231, being separated the water obtained can flow in central passage 23 from hole 231, then flows in oil pipe 1.So can prevent from exceeding because water level is too high and intercept separate sheet 24, cause to intercept to be separated and lost efficacy; Entering dilatation separation chamber 22 when being separated the water obtained simultaneously, the volume of dilatation separation chamber 22 can be reduced, thus weaken the effect of dilatation separation.
The sample port of described sampling pipe 3 is tubaeform, reaches bottom distance set hydroecium 25.Described sample port compares straight port, large with Separation of Water contact area, also larger to the suction of Separation of Water, is therefore convenient to water to derive from collecting chamber 25 faster and better.In order to keep the balance of water separator 2, be provided with two axially symmetrical sampling pipeline sections in advance in the inside of described water separator 2.In order to arrange above-mentioned two sampling pipeline sections, need to slot on the entity of outside, rotational flow separation room 21, in obstruct separate sheet 24, correspondence position opens two holes.Be placed in after in described groove, hole at described sampling pipeline section, need to be fixed in the position of fluting and perforate and to seal.Described mode that is fixing and sealing can be welding.Described sampling pipeline section upper interface place can arrange internal thread 31, is convenient to be connected with the sampling pipe 3 of described water separator 2 outside.The structure on two tunnels a road is also arranged to by the sampling pipe joint that corresponding outside is attached thereto.
During use, first utilize outside sampling pipe 3 that the sampling pipe 3 of water separator 2 inside is threaded connection, under enter in oil pipe 1.Then external sampling pipe 3 is arranging a flange head with relief valve 4 junction and relief valve 4 carries out Flange joint.All the other relief valves 4 and can being in place by Flange joint between the first heat sink 5, second heat sink 6 and sample tap 7.Then open little four-way 11, HTHP wet saturated steam enters oil pipe 1 from described little four-way 11 and carries out steam injection.Part wet saturated steam enters down-hole portion by the gap between described water separator 2 and oil pipe 1, and another part wet saturated steam carries out carbonated drink separation from uncovered the entering in described water separator 2 of the circle of rotational flow separation room 21.Described wet saturated steam enters water separator 2 and realizes carbonated drink separation through rotating separation, dilatation separation, obstruct separation, and the water after separation enters collecting chamber 25.It is as follows that described carbonated drink is separated detailed process:
1, HTHP wet saturated steam enters described water separator 2 from the circle of rotational flow separation room 21 is uncovered.Because rotational flow separation room 21 is provided with rotational flow separation sheet 211, the saturated vapour of annular flow changes flow direction instantaneously under the effect of rotational flow separation sheet 211, produces eddy flow by force.Because described saturated vapour is different with the proportion of water, can produce different centrifugal force when eddy flow, the water that proportion is larger can throw away central axis, and the less steam of proportion flows downward along axis, thus realizes carbonated drink quick separating.After carbonated drink is separated, under gravity, isolated water flows down along rotational flow separation room 21 wall, flows through dilatation separation chamber 22, finally flows in collecting chamber 25.Toward current downflow together with the wet saturated steam of the constant injection that isolated saturated vapour and described steam generator produce.
2, the saturated vapour after being separated from rotational flow separation room 21 and the described wet saturated steam continuing to inject from little four-way 11 enter in dilatation separation chamber 22.The volume 22 of dilatation separation chamber will much larger than the volume of rotational flow separation room 21.The increase of described volume moment, makes HTHP wet saturated steam pressure decline rapidly.The sudden change of described pressure makes saturated vapour and water produce different flow velocitys.Under described different in flow rate effect, described saturated vapour and water and wall produce impact friction, and saturated vapour and water can produce different centrifugal force, and the water that proportion is larger can flow down along wall after producing friction with wall, the steam that proportion is less then continues descending, thus realizes carbonated drink quick separating.The isolated water of described carbonated drink flows down along dilatation separation chamber 22 wall under gravity, finally flows in collecting chamber 25.Down advance together with the wet saturated steam of the constant injection that a part of saturated vapour after described carbonated drink is separated and described steam generator produce, after entering central passage 23, circular out uncovered from central passage 23, enter oil pipe 1, carry out steam injection.And carbonated drink in described most of dilatation separation chamber be separated after saturated vapour flow to and intercept separate sheet 24.
3, described most of saturated vapour after dilatation separation chamber 22 separation flows to and intercepts separate sheet 24, and air-flow swerves after rushing at rapidly and intercepting separate sheet 24 again.Because saturated vapour and institute have different proportion, saturated vapour with water in described movement locus after swerving just difference.The water that proportion is larger can flow in collecting chamber 25 along obstruct separate sheet; The saturated vapour that proportion is less can go back after shock intercepts separate sheet 24 in bounce-back, and described saturated vapour just furthermore achieved that carbonated drink separation with water.
Water level in collecting chamber 25 constantly rises along with the carrying out of carbonated drink separation process.When the accumulation of steam Separation of Water reaches the horn mouth of sampling pipe 3, if the relief valve 4 on sampling pipeline is in open mode, ground and down-hole inside is communicated with, then because down-hole pressure is above the ground level pressure, so sampling pipe 3 can utilize pressure differential that Separation of Water is derived from collecting chamber 25.The sample of deriving is high-temperature high-pressure state.Described HTHP Separation of Water first carry out step-down process through relief valve 4.Through the Separation of Water of step-down process again through the first heat sink 5, obtain Separation of Water after making step-down and be cooled to 100 DEG C-120 DEG C.Then less than 40 DEG C are cooled to through the second heat sink 6 Separation of Water obtained of the first step being lowered the temperature.Finally sample from sample tap 7, sampling terminates.Described water separator 2, in the process of whole steam injection, is all arranged in oil pipe 1.In the process of steam injection, when relief valve 4 is in closed condition, if when the water in collecting chamber 25 amass certain altitude reach the position in hole 231 time, Separation of Water will flow out from hole 231, is flow in oil pipe 1 by central passage 23.When needs sampling is, relief valve 4 can be opened, the water sample flexible pipe after the decrease temperature and pressure flowed out be caused the device measured for steam quality, measure, thus obtain real-time steam quality value from sample tap 7.Described system can obtain required ideal sample easily and quickly, makes the more realistic steam quality of measurement result, to provide foundation for steam quality value under control well.
The embodiment of the present invention 2 is with the main difference of embodiment 1: wherein in order to improve balance and the steadiness of water separator 2, is provided with three axially uniform sampling pipeline sections in the inside of described water separator 2 in advance.Described sampling pipeline section upper interface place is provided with internal thread 31, is convenient to be connected with the sampling pipe 3 of device outside.The structure on three tunnels a road is also arranged to by sampling pipe 3 joint that corresponding outside is attached thereto.The structure that the structure that described three probe tubes connect compares two probe tubes connections is more reliable and more stable.
Present invention also offers a kind of steam sampling method, its concrete steps are as follows:
S1: by good for described steam sampling Operation system setting water separator 2, relief valve 4, first heat sink 5, second heat sink 6 and sample tap 7;
S2: tested steam is injected oil pipe 1 by little four-way 11, injects water separator 2 by oil pipe 1;
S3: the tested steam entering water separator 2 is carried out carbonated drink separation;
S4: utilize the pressure differential in sampling pipe 3 to derive in water separator 2 water sample after being separated;
S5: the water sample of derivation is introduced relief valve 4 and carries out reduced pressure treatment;
S6: post-decompression water sample is introduced heat sink and carry out cooling process;
S7: taken out from sample tap 7 by the water sample after described cooling, sampling terminates.
Described steam sampling method, S3 specifically comprises rotational flow separation, dilatation is separated and intercept the mode being separated three's carbonated drink and being separated.
Described steam sampling method, S6 specifically comprises:
S61: utilize the first heat sink 5 that the water sample after relief valve 4 reduced pressure treatment is cooled to 100 DEG C-120 DEG C;
S62: utilize the second heat sink 6 that the water sample after lowering the temperature through the first heat sink 5 is cooled to less than 40 DEG C.
Described first heat sink 5 can be blast injection vortex tube refrigerating plant.Described second heat sink 6 can be semiconductor cooler.
Claims (9)
1. a steam sampling system, is characterized in that, comprises water separator, sampling pipe, relief valve, sample heat sink, sample tap, wherein,
Water separator, is positioned at oil pipe, for carrying out carbonated drink separation to the underground steam injected;
Sampling pipe, for connecting water separator and relief valve, the current flowline guiding described water separator to be separated is to relief valve;
Relief valve, for reducing pressure to the described Separation of Water flowed into from sampling pipe;
Sample heat sink, for lowering the temperature through the post-decompression Separation of Water of relief valve to described;
Sample tap, for the outlet as the Separation of Water after described cooling;
Described water separator comprises rotational flow separation room, dilatation separation chamber, central passage, obstruct separate sheet and collecting chamber, wherein,
Rotational flow separation room is positioned at the top of described water separator, the upper surface of described rotational flow separation room is provided with opening and is communicated with oil pipe, lower surface is provided with opening and is communicated with dilatation separation chamber, and inside is provided with rotational flow separation sheet, and described rotational flow separation room is for realizing the rotational flow separation of carbonated drink;
Dilatation separation chamber is positioned at the middle part of described water separator, and described dilatation separation chamber is all communicated with described rotational flow separation room, central passage, collecting chamber, and described dilatation separation chamber is separated for the dilatation realizing carbonated drink;
Central passage is positioned at the middle and lower part of described water separator, and distribute along the central axis of described water separator, described central passage is equal opening up and down, and upper surface is communicated with dilatation separation chamber, lower surface is communicated with oil pipe, and described central passage is used for the circulation of steam;
Intercept separate sheet to be fixedly connected with described central passage outer wall, leave gap with water separator inwall, described obstruct separate sheet is separated for the obstruct realizing carbonated drink;
Collecting chamber is positioned at the bottom of described water separator, and be positioned at beyond described central passage, intercept below separate sheet, described collecting chamber is for collecting the water after separation.
2. steam sampling system as claimed in claim 1, is characterized in that: described collecting chamber from bottom surface upwards sectional area increase progressively.
3. steam sampling system as claimed in claim 1, is characterized in that: described collecting chamber is also being provided with hole with central passage intersection.
4. steam sampling system as claimed in claim 1, is characterized in that: the described sampling pipe for connecting water separator is at least 2.
5. the steam sampling system as described in claim 1 or 4, is characterized in that: described sampling pipe water sucting port is tubaeform.
6. steam sampling system as claimed in claim 1, is characterized in that: described obstruct separate sheet is outward-dipping by center.
7. a steam sampling method, is characterized in that:
S1: by good for described steam sampling Operation system setting water separator, relief valve, sample heat sink and sample tap;
S2: tested steam is injected oil pipe by little four-way, injects water separator by oil pipe;
S3: the tested steam entering water separator is carried out carbonated drink separation;
S4: utilize the pressure differential in sampling pipe to derive in water separator the water sample after being separated;
S5: the water sample of derivation is introduced relief valve and carries out reduced pressure treatment;
S6: post-decompression water sample is introduced heat sink and carry out cooling process;
S7: taken out from sample tap by the water sample after described cooling, sampling terminates.
8. steam sampling method as claimed in claim 7, is characterized in that: the carbonated drink described in S3 separation specifically comprises rotational flow separation, dilatation is separated and is separated with obstruct.
9. steam sampling method as claimed in claim 7, is characterized in that: the cooling process described in S6 is specially is down to less than 40 DEG C by described post-decompression water sample through heat sink.
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| CN104314543B (en) * | 2014-10-11 | 2017-01-25 | 中国石油天然气股份有限公司 | Shaft and method used for reducing heat loss |
| CN105756677B (en) * | 2016-05-14 | 2022-11-18 | 中国石油化工股份有限公司 | High water content oil well total analysis oil sample sampler |
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