CN114458309A - Wellhead sampler for oil production well - Google Patents
Wellhead sampler for oil production well Download PDFInfo
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- CN114458309A CN114458309A CN202011245042.3A CN202011245042A CN114458309A CN 114458309 A CN114458309 A CN 114458309A CN 202011245042 A CN202011245042 A CN 202011245042A CN 114458309 A CN114458309 A CN 114458309A
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- liquid
- sampler
- wellhead
- oil production
- production well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/086—Withdrawing samples at the surface
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明为一种采油井井口取样器，该采油井井口取样器包括内部形成有第一容液腔的取样器主体，取样器主体的顶部和底部分别开设有与第一容液腔相连通的进液口和排液口，进液口与井口出液管线连接，进液口处和排液口处分别设置有进液阀和排液阀；第一容液腔的内部设置有活塞，通过控制活塞在第一容液腔内滑动，以挤压第一容液腔内的取样液从排液口排出。本发明解决了采油井井口取样装置使用效果不佳的技术问题。
The invention relates to a wellhead sampler for an oil production well. The wellhead sampler for an oil production well comprises a sampler main body with a first liquid-accommodating cavity formed inside. The top and bottom of the sampler main body are respectively provided with a The liquid inlet and the liquid discharge port, the liquid inlet is connected with the wellhead liquid outlet pipeline, and the liquid inlet and the liquid discharge port are respectively provided with a liquid inlet valve and a liquid discharge valve; The control piston slides in the first liquid containing chamber to squeeze the sample liquid in the first liquid containing chamber to be discharged from the liquid discharge port. The invention solves the technical problem of poor use effect of the sampling device at the wellhead of the oil production well.
Description
Technical Field
The invention relates to the field of oil extraction engineering, in particular to a wellhead sampler of an oil production well, and particularly relates to a wellhead sealing sampler of the oil production well, which can quantitatively sample.
Background
At present, the oil field adopts well head sample, full quality chemical examination mode to detect the oil recovery well moisture more, and well head sampling device adopts needle valve or flashboard valve etc. more, exists shortcoming and not enough in the sampling process and is:
first, during the venting process, H in the associated gas2S and other toxic and harmful gases have potential safety hazards of poisoning to operators, and are discharged into the atmosphere to cause environmental pollution;
secondly, in the process of externally discharging oil dirt, the problems of difficult dirt cleaning and overhigh post-treatment cost can be caused;
thirdly, the installation of the wellhead sampling valve is not standard, certain potential safety hazard exists, and residual oil in the wellhead sampling valve cannot be completely discharged, so that the problem of poor assay precision is caused, and the analysis and management of oil well production data are influenced;
and fourthly, sampling quantity of the oil liquid is measured by adopting a visual inspection method, so that sampling weight is not up to standard, periodical test moisture analysis is influenced, repeated sampling is caused, invalid workload is increased, the labor intensity of workers is increased, and the working efficiency is low.
Aiming at the problem that the using effect of a wellhead sampling device of an oil production well in the related technology is not good, an effective solution is not provided at present.
Therefore, the inventor provides a wellhead sampler of the oil production well by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a wellhead sampler for an oil production well, which realizes quantitative sampling of oil, reduces the working strength of sampling, improves the sampling efficiency, realizes quantitative sampling and greatly improves the sampling precision.
Another object of the present invention is to provide a wellhead sampler for an oil production well, which can fully discharge oil after sampling, thereby preventing detection errors caused by residual oil inside the wellhead sampler, preventing the residual oil from freezing in the sampler, preventing the sampler from being damaged, greatly prolonging the service life of the wellhead sampler, and being suitable for field sampling operations.
The purpose of the invention can be realized by adopting the following technical scheme:
the invention provides a wellhead sampler of an oil production well, which comprises a sampler main body, wherein a first liquid containing cavity is formed inside the sampler main body, the top and the bottom of the sampler main body are respectively provided with a liquid inlet and a liquid outlet which are communicated with the first liquid containing cavity, the liquid inlet is connected with a wellhead liquid outlet pipeline, and the liquid inlet and the liquid outlet are respectively provided with a liquid inlet valve and a liquid outlet valve;
the piston is arranged in the first liquid containing cavity and is controlled to slide in the first liquid containing cavity so as to extrude the sampling liquid in the first liquid containing cavity to be discharged from the liquid discharge port.
In a preferred embodiment of the present invention, the wellhead sampler for the oil production well further comprises a liquid discharge control rod, a connection end of the liquid discharge control rod is connected with the piston, and a control end of the liquid discharge control rod extends to the outside of the first liquid containing cavity so as to control the piston to slide through the liquid discharge control rod.
In a preferred embodiment of the present invention, the first liquid containing cavity extends horizontally inside the sampler main body, the piston can slide along the extending direction of the first liquid containing cavity, and the outer wall of the piston is tightly attached to the inner wall of the first liquid containing cavity;
the liquid inlet and the liquid outlet are communicated with the inside of the first liquid containing cavity and one side of the control end far away from the liquid drainage control rod.
In a preferred embodiment of the present invention, the sampler main body is provided with a first gland, the first gland is connected with the sampler main body in a sealing manner, and one end of the liquid discharge control rod, which is far away from the piston, passes through the first gland and extends out of the first liquid containing cavity.
In a preferred embodiment of the present invention, a support ring is disposed inside the first liquid containing cavity, an annular outer edge of the support ring is connected to an inner wall of the first liquid containing cavity, and an end of the liquid discharge control rod, which is far away from the piston, sequentially passes through the support ring and the first gland and extends out of the first liquid containing cavity.
In a preferred embodiment of the present invention, a first hand wheel is disposed on an end of the liquid discharge control rod away from the piston.
In a preferred embodiment of the present invention, the liquid discharge control rod is a screw rod, the first pressing cover and the support ring are respectively provided with a threaded hole matching with the liquid discharge control rod, and the liquid discharge control rod is respectively in threaded connection with the first pressing cover and the support ring.
In a preferred embodiment of the present invention, the wellhead sampler for the oil production well further includes a liquid inlet control rod for controlling a lifting position of the liquid inlet valve, the liquid inlet control rod is sleeved with a gear, the liquid inlet valve is provided with a rack along a vertical direction, teeth on the gear are engaged with teeth on the rack, and the liquid inlet control rod is rotated to drive the liquid inlet valve to perform a lifting motion so as to control the on-off of the liquid inlet.
In a preferred embodiment of the present invention, the liquid inlet valve includes a valve head, a first connecting rod arranged along a vertical direction, and a second connecting rod arranged along a horizontal direction, the rack is arranged on an outer wall of the first connecting rod, an accommodating cavity is formed inside the sampler main body, a lower portion of the first connecting rod is arranged in the accommodating cavity in a manner of being capable of moving up and down, one end of the liquid inlet control rod, which is provided with the gear, is arranged in the accommodating cavity, and the liquid inlet control rod is connected with the first connecting rod through the gear and the rack in a matching manner;
the top end of the first connecting rod is positioned outside the accommodating cavity and is connected with one end of the second connecting rod, the other end of the second connecting rod is connected with the valve head, and when the valve head moves upwards, the first liquid accommodating cavity is communicated with the wellhead liquid outlet pipeline through the liquid inlet; when the valve head moves downwards, the valve head enters the liquid inlet so as to seal the liquid inlet.
In a preferred embodiment of the present invention, the first link and the second link are integrally formed.
In a preferred embodiment of the present invention, a second gland is disposed on the sampler main body, the second gland is connected to the sampler main body in a sealing manner, and an end of the liquid inlet control rod, which is far away from the liquid inlet valve, passes through the second gland and extends out of the accommodating chamber.
In a preferred embodiment of the present invention, a second handwheel is disposed at an end of the liquid inlet control lever away from the liquid inlet valve.
In a preferred embodiment of the present invention, the valve head is a cylindrical structure arranged along a vertical direction, a top end of the valve head is fixed on the second connecting rod, a sealing ring is fixedly sleeved on the valve head, and an outer wall of the sealing ring is tightly attached to an inner wall of the liquid inlet when the valve head blocks the liquid inlet.
In a preferred embodiment of the present invention, the oil production wellhead sampler further includes a liquid containing cover, the liquid containing cover is covered on the top of the sampler main body, a second liquid containing cavity communicated with the liquid inlet is formed inside the liquid containing cover, the liquid inlet valve is located inside the second liquid containing cavity, a liquid containing cover inlet communicated with the second liquid containing cavity is formed on the second liquid containing cover, and the liquid containing cover inlet is connected with the wellhead liquid outlet pipeline.
In a preferred embodiment of the present invention, a mounting flange is provided at the inlet of the liquid containing cover.
In a preferred embodiment of the present invention, the drain valve is a columnar structure disposed along a horizontal direction, the drain valve is slidably connected to the sampler body, one end of the drain valve passes through the drain port along a radial direction of the drain port to close the drain port, and the other end of the drain valve is located outside the sampler body.
In a preferred embodiment of the present invention, a third hand wheel is disposed at one end of the drain valve located outside the sampler body.
In a preferred embodiment of the present invention, a liquid receiving box with an open top is disposed below the liquid discharge port, and the open top of the liquid receiving box is communicated with the liquid discharge port.
In a preferred embodiment of the present invention, a slide way is disposed at the bottom of the sampler body, and the top edge of the liquid receiving box is slidably embedded in the slide way.
From the above, the oil production well head sampler of the invention has the characteristics and advantages that: a first liquid containing cavity is formed in the sampler main body, a liquid inlet and a liquid outlet which are communicated with the first liquid containing cavity are formed in the sampler main body, a liquid inlet valve and a liquid outlet valve are respectively arranged at the liquid inlet and the liquid outlet, a piston is slidably arranged in the first liquid containing cavity, the liquid inlet valve is controlled to be opened and the liquid outlet valve is controlled to be closed in the sampling process, the sampling liquid in a wellhead liquid outlet pipeline flows into the first liquid containing cavity through the liquid inlet, the liquid containing amount of the first liquid containing cavity is adjusted by controlling the position of the piston, the quantitative sampling of the sampling liquid is completed, the working strength of the sampling is reduced, the sampling efficiency is improved, and the sampling precision is improved; in the process of discharging the sampling liquid, the liquid inlet valve is controlled to be closed, the liquid discharge valve is controlled to be opened, the piston is controlled to slide towards the direction close to the liquid discharge port, the sampling liquid in the first liquid containing cavity is extruded and discharged from the liquid discharge port, the sampling liquid is ensured to be fully discharged, the detection error caused by the sampling liquid remaining in the first liquid containing cavity is avoided, the remaining sampling liquid is prevented from being frozen in the sampler, the sampler is ensured to be in a stable working state for a long time, the service life of the sampler is prolonged, and the sampling device is particularly suitable for field sampling operation in harsh environments and the like.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Wherein:
FIG. 1: the invention is a structural schematic diagram of a wellhead sampler of an oil production well.
FIG. 2: the invention is a structural schematic diagram of the connection position of a liquid inlet control rod and a liquid inlet valve in a wellhead sampler of an oil production well.
FIG. 3: the invention is a schematic structural diagram of a wellhead sampler of an oil production well in a liquid inlet state.
FIG. 4: the invention is a structural schematic diagram of the oil production well head sampler in a liquid discharge state.
The reference numbers in the invention are:
1. a sampler main body; 101. A first liquid containing chamber;
102. a liquid inlet; 103. A liquid discharge port;
104. a slideway; 105. An accommodating cavity;
2. a liquid containing cover; 201. A second liquid containing cavity;
202. an inlet of the liquid containing cover; 3. A liquid discharge control lever;
4. a piston; 5. A first hand wheel;
6. a first gland; 7. A support ring;
8. a liquid inlet valve; 801. A first link;
802. a second link; 803. A valve head;
804. a rack; 9. A seal ring;
10. a liquid inlet control lever; 1001. A gear;
11. a second hand wheel; 12. A second gland;
13. a drain valve; 14. A third hand wheel;
15. a liquid receiving box; 16. And (7) mounting a flange.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a wellhead sampler for an oil production well, which comprises a sampler main body 1, wherein a first liquid containing cavity 101 is formed inside the sampler main body 1, a liquid inlet 102 communicated with the first liquid containing cavity 101 is formed at the top of the sampler main body 1, a liquid outlet 103 communicated with the first liquid containing cavity 101 is formed at the bottom of the sampler main body 1, the liquid inlet 102 is connected with a wellhead liquid outlet pipeline, a liquid inlet valve 8 capable of controlling the on-off of the liquid inlet 102 is arranged at the liquid inlet 102, and a liquid outlet valve 13 capable of controlling the on-off of the liquid outlet 103 is arranged at the liquid outlet 103; a piston 4 is slidably provided in the first liquid containing chamber 101, and the piston 4 is controlled to slide in the first liquid containing chamber 101 to press the sample liquid in the first liquid containing chamber 101 and discharge the sample liquid from the liquid discharge port 103.
In the sampling process, the liquid inlet valve 8 is controlled to be opened, the liquid outlet valve 13 is controlled to be closed, the sampling liquid in the wellhead liquid outlet pipeline flows into the first liquid containing cavity 101 through the liquid inlet 102, and the liquid containing amount of the first liquid containing cavity 101 is regulated and controlled by controlling the sliding position of the piston 4 in the first liquid containing cavity 101, so that the quantitative sampling of the sampling liquid can be completed, the sampling working strength is reduced, the sampling efficiency is improved, and the sampling precision is improved; in the process of discharging the sampling liquid, the liquid inlet valve 8 is controlled to be closed, the liquid discharge valve 13 is controlled to be opened, the piston 4 is controlled to slide towards the direction close to the liquid discharge port 103, the sampling liquid in the first liquid containing cavity 101 is extruded through the piston 4 and is discharged from the liquid discharge port 103, so that the sampling liquid is fully discharged, the detection error caused by the sampling liquid remaining in the first liquid containing cavity 101 is avoided, the remaining sampling liquid is prevented from being frozen in the sampler, the sampler is ensured to be in a stable working state for a long time, the service life of the sampler is prolonged, and the sampling device is particularly suitable for field sampling operation in bad environment and the like.
In an alternative embodiment of the present invention, as shown in fig. 1, the wellhead sampler for the oil production well further comprises a liquid discharge control rod 3, two ends of the liquid discharge control rod 3 are a connection end and a control end respectively, the connection end of the liquid discharge control rod 3 is connected with the piston 4, and the control end of the liquid discharge control rod 3 extends out of the first liquid containing cavity 101 so as to control the piston 4 to slide in the first liquid containing cavity 101 through the liquid discharge control rod 3.
Furthermore, the liquid discharge control rod 3 is marked with scales, so that the worker can conveniently determine the position of the piston 4 in the first liquid containing cavity 101, further determine the liquid containing amount of the first liquid containing cavity 101, and achieve the purpose of quantitative sampling.
Specifically, as shown in fig. 1, the first liquid containing cavity 101 is a cylindrical cavity extending in the horizontal direction inside the sampler body 1, the piston 4 can be slidably disposed in the first liquid containing cavity 101 along the extending direction of the first liquid containing cavity 101, and the outer wall of the piston 4 is tightly attached to the inner wall of the first liquid containing cavity 101; the liquid inlet 102 and the liquid outlet 103 are both communicated with the inside of the first liquid containing cavity 101 and one side of the control end far away from the liquid discharge control rod 3, so that the piston 4 is ensured to fully extrude the sampling liquid in the first liquid containing cavity 101 to one side of the liquid outlet 103, and the sampling liquid is fully discharged.
In an alternative embodiment of the present invention, as shown in fig. 1, a first gland 6 for sealing the connection position of the liquid discharge control rod 3 and the sampler body 1 is arranged on the sampler body 1, the first gland 6 is connected with the sampler body 1 in a sealing manner, one end of the liquid discharge control rod 3 far away from the piston 4 (i.e. the control end of the liquid discharge control rod 3) passes through the first gland 6 and extends out of the first liquid containing cavity 101, and the first gland 6 ensures good sealing performance of the connection position of the liquid discharge control rod 3 and the sampler body 1.
Further, as shown in fig. 1, a support ring 7 is arranged inside the first liquid containing cavity 101, an annular outer edge of the support ring 7 is connected with an inner wall of the first liquid containing cavity 101, one end of the liquid discharge control rod 3, which is far away from the piston 4, sequentially penetrates through the support ring 7 and the first gland 6 and extends out of the first liquid containing cavity 101, and the support ring 7 supports the liquid discharge control rod 3, so that the stability of the liquid discharge control rod 3 is improved.
Further, as shown in fig. 1, a first hand wheel 5 is arranged at one end of the liquid discharge control rod 3, which is far away from the piston 4, and the liquid discharge control rod 3 is convenient for a worker to control through the first hand wheel 5.
Further, the liquid discharge control rod 3 may be, but not limited to, a screw rod, threaded holes are respectively formed in the first pressing cover 6 and the support ring 7, the threaded holes are matched with the liquid discharge control rod 3, the liquid discharge control rod 3 is respectively in threaded connection with the first pressing cover 6 and the support ring 7, the length of the liquid discharge control rod 3 entering the first liquid containing cavity 101 is adjusted by rotating the liquid discharge control rod 3, and then the position of the piston 4 in the first liquid containing cavity 101 is controlled.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, the wellhead sampler for the oil production well further includes a liquid inlet control rod 10, the liquid inlet control rod 10 controls the lifting position of the liquid inlet valve 8, a gear 1001 is sleeved on the liquid inlet control rod 10, a rack 804 is vertically disposed on the liquid inlet valve 8, teeth on the gear 1001 are engaged with teeth on the rack 804, and the liquid inlet control rod 10 is rotated to drive the liquid inlet valve 8 to move up and down, so as to control the on-off of the liquid inlet 102.
Specifically, as shown in fig. 1 and fig. 2, the liquid inlet valve 8 includes a valve head 803, a first connecting rod 801 arranged along a vertical direction, and a second connecting rod 802 arranged along a horizontal direction, a rack 804 is fixedly arranged on an outer wall of the first connecting rod 801 along the vertical direction, an accommodating cavity 105 isolated from the first liquid accommodating cavity 101 is further formed inside the sampler body 1, a lower portion of the first connecting rod 801 is movably arranged in the accommodating cavity 105 up and down, one end of the liquid inlet control rod 10, which is provided with a gear 1001, is arranged in the accommodating cavity 105, and the liquid inlet control rod 10 is connected with the first connecting rod 801 through the gear 1001 and the rack 804 in a matching manner; the top end of the first connecting rod 801 is located outside the accommodating cavity 105 and is connected with one end of the second connecting rod 802, the other end of the second connecting rod 802 is connected with the valve head 803, when the valve head 803 is controlled to move upwards, the first liquid accommodating cavity 101 is communicated with a wellhead liquid outlet pipeline through the liquid inlet 102, and sampling liquid in the wellhead liquid outlet pipeline can flow into the first liquid accommodating cavity 101; when the control valve head 803 is moved downwards, the valve head 803 enters the liquid inlet 102 to seal the liquid inlet 102.
Further, the first link 801 and the second link 802 may be, but not limited to, integrally formed.
Further, as shown in fig. 1, be provided with on the sampler main body 1 and carry out the second gland 12 sealed to the hookup location of feed liquor control rod 10 with sampler main body 1, second gland 12 and sampler main body 1 sealing connection, the one end of keeping away from feed liquor valve 8 on the feed liquor control rod 10 passes second gland 12 and stretches out to the outside of holding chamber 105, guarantees the good leakproofness of hookup location of feed liquor control rod 10 and sampler main body 1 through second gland 12.
Further, as shown in fig. 1, a second hand wheel 11 is arranged at one end of the liquid inlet control rod 10, which is far away from the liquid inlet valve 8, and the second hand wheel 11 is convenient for an operator to control the liquid inlet control rod 10.
Further, as shown in fig. 1, the valve head 803 is a cylindrical structure arranged along the vertical direction, the top end of the valve head 803 is fixed on the second connecting rod 802, the valve head 803 is fixedly sleeved with the sealing ring 9, and the outer wall of the sealing ring 9 is tightly attached to the inner wall of the liquid inlet 102 in the state that the valve head 803 blocks the liquid inlet 102, so that good sealing performance of the valve head 803 to the liquid inlet 102 in the blocking state is ensured, and the sample liquid is prevented from permeating into the first liquid containing cavity 101.
In an alternative embodiment of the present invention, as shown in fig. 1, the wellhead sampler for the oil production well further includes a liquid containing cover 2, the liquid containing cover 2 is covered on the top of the sampler main body 1, a second liquid containing cavity 201 communicated with the liquid inlet 102 is formed inside the liquid containing cover 2, the liquid inlet valve 8 is located inside the second liquid containing cavity 201, a liquid containing cover inlet 202 communicated with the second liquid containing cavity 201 is formed on the second liquid containing cover 2, and the liquid containing cover inlet 202 is connected with a wellhead liquid outlet pipeline.
Further, as shown in fig. 1, a mounting flange 16 is provided at the inlet 202 of the liquid-containing cover.
In an alternative embodiment of the present invention, as shown in fig. 1, drain valve 13 is a cylindrical structure disposed in a horizontal direction, drain valve 13 is slidably connected to sampler body 1, one end of drain valve 13 passes through drain port 103 along a radial direction of drain port 103 to close drain port 103, and the other end of drain valve 13 is located outside sampler body 1.
Further, as shown in fig. 1, a third hand wheel 14 is arranged at one end of liquid discharge valve 13 located outside sampler main body 1, and a worker can control liquid discharge valve 13 conveniently through third hand wheel 14, so as to control the on-off of liquid discharge port 103.
In an alternative embodiment of the present invention, as shown in fig. 1, a liquid receiving box 15 with an open top is disposed below the liquid discharge port 103, the open top of the liquid receiving box 15 is communicated with the liquid discharge port 103, and externally discharged sampling liquid is directly discharged into the liquid receiving box 15.
Further, as shown in fig. 1, a slide way 104 is provided at the bottom of the sampler body 1, and a boss is provided at the top edge of the liquid receiving box 15, and the boss is slidably embedded in the slide way 104, so that the liquid receiving box 15 can be detachably mounted at the bottom of the sampler body 1.
The using process of the oil production well head sampler of the invention is as follows:
step S1: wiping the liquid discharge port 103 clean with cotton yarn;
step S2: placing a sampling liquid container (a sampling bag or a sampling barrel) in the liquid receiving box 15, and installing the liquid receiving box 15 at the lower part of the sampler main body 1 through a slide way 104, wherein the opening of the sampling liquid container is aligned with the liquid discharge port 103;
step S3: as shown in fig. 3, the liquid inlet control rod 10 is rotated to control the liquid inlet valve 8 to move upwards, the liquid inlet 102 connects the first liquid containing cavity 101 with the liquid outlet pipeline of the wellhead, and the liquid outlet valve 13 is in a closed state;
step S4: the liquid discharge control rod 3 is rotated for multiple times in the forward direction and the reverse direction, so that the piston 4 finishes multiple liquid suction and discharge actions in the first liquid containing cavity 101, and the sampling liquid flowing into the first liquid containing cavity 101 through a wellhead liquid outlet pipeline is ensured to be fresh output liquid (namely, the sampling liquid is not remained in the original first liquid containing cavity 101 or the wellhead liquid outlet pipeline);
step S5: controlling the position at which the piston 4 stops in the first liquid containing chamber 101 according to the required amount of the sampling liquid, and enabling the sampling liquid to flow into the first liquid containing chamber 101;
step S6: the liquid inlet control rod 10 is rotated to control the valve head 803 on the liquid inlet valve 8 to move downwards into the liquid inlet 102, and the liquid inlet valve 8 is closed;
step S7: as shown in fig. 4, the liquid discharge valve 13 is controlled to be opened, the liquid discharge control lever 3 is rotated to slide the piston 4 toward the liquid discharge port 103, and the sample liquid is squeezed and discharged from the liquid discharge port 103 and flows into the sample liquid container;
step S8: and (4) controlling the liquid discharge valve 13 to be closed, taking out the sampling liquid container, and wiping the liquid discharge port 103 clean by cotton yarns to finish sampling operation.
The oil production well mouth sampler of the invention has the characteristics and advantages that:
one, this oil recovery well head sampler is through the gliding position of control piston 4 in first appearance fluid chamber 101 to the appearance fluid measure to first appearance fluid chamber 101 is regulated and control, can accomplish the quantitative sample to the sampling liquid, reduces the working strength of sample, improves sample efficiency, improves the sample precision.
Secondly, this oil recovery well head sampler extrudees the sample fluid in first appearance sap cavity 101 and discharges from leakage fluid dram 103 through piston 4 to guarantee the abundant discharge of sample fluid, avoided because remaining the detection error that causes of sample fluid in first appearance sap cavity 101, and avoid remaining sample fluid to freeze in the sampler, guaranteed that the sampler is in stable operating condition for a long time, the life of extension sampler, be particularly suitable for the harsh open-air on-the-spot sample operation of environment.
Thirdly, the oil production well head sampler realizes the functions of sealing, quantifying, reducing water content error, preventing freezing, preventing theft and the like, so that the well head sampling is safe and environment-friendly, the labor intensity of sampling and testing is reduced, and the oil well sampling work efficiency is improved.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (19)
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| RU2257471C1 (en) * | 2003-12-15 | 2005-07-27 | Хузин Ринат Раисович | Sampler |
| RU2305770C1 (en) * | 2006-02-06 | 2007-09-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Accumulation sampling device |
| CN101526444A (en) * | 2009-04-13 | 2009-09-09 | 中国海洋石油总公司 | Hydraulic-control high-pressure environment liquid sampler |
| CN105089665A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Extraction type polymer solution sampler |
| US20180045616A1 (en) * | 2015-02-10 | 2018-02-15 | Fluid Transfer Technology Pty Ltd | Liquid sampling |
| CN206130275U (en) * | 2016-10-26 | 2017-04-26 | 江苏腾龙石化机械有限公司 | Meshing slidingtype stop valve |
| CN206746503U (en) * | 2017-04-27 | 2017-12-15 | 金溪斯普瑞药业有限公司 | Enter charging mechanism in a kind of pharmaceutical intermediate reaction |
| CN107882553A (en) * | 2017-12-13 | 2018-04-06 | 李振文 | Note the online closed sampling device of polymers |
| CN208918527U (en) * | 2018-10-26 | 2019-05-31 | 李贺军 | A kind of sampling device for freezen protection at portal of petroleum attraction well |
| CN210714691U (en) * | 2019-05-31 | 2020-06-09 | 中国石油天然气股份有限公司 | A sampling valve and oil well sampling system |
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