CN2606349Y - Pressure differential mercury instrument - Google Patents
Pressure differential mercury instrument Download PDFInfo
- Publication number
- CN2606349Y CN2606349Y CN 03216204 CN03216204U CN2606349Y CN 2606349 Y CN2606349 Y CN 2606349Y CN 03216204 CN03216204 CN 03216204 CN 03216204 U CN03216204 U CN 03216204U CN 2606349 Y CN2606349 Y CN 2606349Y
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- mercury
- pressure
- differential pressure
- pipeline
- core chamber
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Abstract
The utility model provides an-injection apparatus by differential pressure method. The apparatus utilizes the principle of gravity difference to design in the area of structure, wherein a core room, a mercury-volume measure tube and a mercury-supplement cup are communicated in U-shape, and high-pressure valves are arranged in the pipeline among the core room, the mercury-volume measure tube and the mercury-supplement cup. Moreover, the positing of the core room is higher than the initiative position of the mercury surface in the measure tube. The height of the mercury-supplement cup is adjustable. The top of the core room is connected with a vacuum pump. The lower end of the mercury-volume measure tube is connected with the high-pressure cavity of the differential pressure sensor, which the pipeline and the high-pressure cavity are full of mercury. The upper end of the mercury-volume measure tube is divided into three routes which connect with the low-pressure cavity of the differential pressure sensor, a pressure measure unit and the high-pressure column piston pump, which the pipeline and the low-pressure cavity are full of alcohol. Electromagnetic valves are arranged between the pressure sensor of high, middle and low range. The change of the pressure of mercury, pressure measurement and balanced judgments and the switching of the electromagnetic valves are fulfilled automatically by a computer, thereby the whole test process happens in the core room and ensuring the continuity of the test and the integrality of the mercury-ebbing curve.
Description
Technical field:
The utility model relates to a kind of oil geology field that is used for, and measures the instrument of reservoir rocks sample well gap structure.
Background technology:
The method of work of mercury injection apparatus is under different pressure mercury to be pressed in the rock sample hole, measures to enter the Trace Mercury volume of rock sample and the corresponding variation relation of pressure, thereby measures the pore structure characteristic of rock sample.Producing both at home and abroad at present has dissimilar mercury injection apparatuses, and structure is different, and length is arranged mutually.But the problem that still has following several respects: 1. its mercury ejection pressure falls less than absolute pressure zero during mercury ejection, can only fall back on relative pressure zero, makes mercury ejection curve imperfect.2. will interrupt in working rock sample is moved to high pressure core chamber from low pressure core chamber, test process be discontinuous.3. the process of changing core chamber and cleaning low pressure core chamber has increased operating personnel and the chance that mercury comes in contact, and owing to mercury is noxious material, can operating personnel's health be damaged.4. the measuring method complexity of Trace Mercury volume change.
Summary of the invention:
The purpose of this utility model is that a kind of differential pressure method mercury injection apparatus will be provided, and it utilizes differential pressure pick-up to measure the Trace Mercury volume, to solve simultaneously that curve is imperfect, the course of work is discontinuous and operation in the many problems of contact mercury chance.
The purpose of this utility model is achieved in that core chamber, mercury cubing pipe, being the U type between the mercury supplementing cup three is communicated with, on the pipeline between any two high-pressure valve is housed, and the position of core chamber is higher than initial mercury solution face position in the measuring tube, the mercury supplementing cup adjustable height, the core chamber top connects vacuum pump, high-pressure valve also is housed on the pipeline between them, the high pressure chest of the following termination differential pressure pick-up of mercury cubing pipe, be full of mercury in its pipeline and the high pressure chest, three tunnel low-pressure cavity that connect differential pressure pick-up are respectively divided in the upper end of mercury cubing pipe, pressure measurement unit and high-pressure plunger pump, be full of alcohol in its pipeline and the low-pressure cavity, the pressure measurement unit is connected in series by the pressure transducer and the high-pressure solenoid valve of different ranges, the supercharging decompression of pump, the measurement of pressure and balance are judged, the switch of solenoid valve is finished automatically by computing machine.
Because adopt such scheme, the utility model can intactly be measured into mercury and mercury ejection curve; Need not interrupt in the test, guarantee the integrality of test process; Differential pressure method is measured the mercury volume, and method is simple, and precision is also guaranteed; Alcohol is made pressure transmission medium, does not need frequent cleaning, and test is carried out in a core chamber, need not to change core chamber, reduces the harm of mercury to human body; The pressure survey classification is carried out, and has guaranteed tonometric continuity and accuracy; In the test process, the supercharging decompression of pump, the measurement of pressure and balance are judged, the switch of solenoid valve is finished automatically by computing machine, have improved the automaticity of instrument.
Describe the concrete structure of the differential pressure method mercury injection apparatus that the utility model proposes in detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the structural representation of the differential pressure method mercury injection apparatus that proposes of the utility model.
Fig. 2 is the mercury cubing pipe synoptic diagram of the differential pressure method mercury injection apparatus that proposes of the utility model.
Embodiment
1. adopt the gravitational difference principle to design on the structure, the core chamber top is higher than initial specific height of mercury face in the mercury cubing pipe, the on-site atmospheric numerical value H that represents with height of mercury when this highly equals the instrument use.Because atmospheric pressure changes to some extent with environment, so specialized designs adjustable for height mercury supplementing cup, the mercury supplementing cup bottom is linked to each other by pipeline with mercury cubing pipe bottom, forming the U type is communicated with, by regulating the height of mercury supplementing cup, just can regulate initial mercury face in the mercury cubing pipe, guarantee that the difference in height at initial mercury face and core chamber top equals H.As in Fig. 1, mercury cubing pipe 14, mercury supplementing cup 16, high-pressure valve 13,15 and differential pressure pick-up 12 are installed in the rack 4, core chamber 3 is installed on the top of rack 4, mercury face in the top of core chamber 3 and the mercury supplementing cup 16 and the difference in height between the initial mercury face in the mercury cubing pipe 14 are H, the adjustable height of mercury supplementing cup 16.During test, the core chamber 3 of earlier tested rock sample being packed into, open the valve 2,13 of core chamber's upper and lower then, close the valve 15 between mercury supplementing cup 16 and the mercury cubing pipe 14, the power supply of connecting vacuum pump 1 vacuumizes, and after 10 minutes, opens valve 15, mercury in the mercury supplementing cup 16 will enter core chamber 3 under atmospheric effect, regulating mercury supplementing cup 16, to make the difference in height at wherein initial mercury face position and core chamber 3 tops be at that time the suitable height of mercury value of atmospheric value.Valve-off 2 then, close vacuum pump 1.Initial mercury face in the mercury cubing pipe 14 can utilize the advance and retreat of system controlled by computer high-pressure plunger pump 11 to regulate, the foundation of regulating is the reading of pressure transducer 7, valve-off 15 when the solenoid valve 8,9 of opening installation between pressure transducer 5,6,7, the reading that is adjusted to pressure transducer 7 are zero.Just can utilize system controlled by computer high-pressure plunger pump 11 to press mercury and mercury ejection work then.At this moment, when the pressure at initial mercury face place was relative pressure zero in pressure transducer 7 is measured mercury cubing pipe 14, the pressure at core chamber 3 tops was absolute pressures zero.Can guarantee that so just pressure survey all carries out under positive pressure, and when pressure transducer 7 retreated to relative pressure zero, core chamber's 3 top pressures can retreat to absolute pressure zero, have guaranteed the integrality of mercury ejection curve during mercury ejection.Because structural improvement also makes all tests all carry out in a core chamber, has guaranteed the integrality of the course of work.
2. as in Fig. 1, utilize computing machine to drag high-pressure plunger pump 11 and carry out the increase and decrease of pressure, guarantee the continuity of supercharging and decompression, thereby guarantee the integrality and the continuity of data according to predefined spot pressure control step motor 10; The maintenance of each spot pressure pressure balance, the collection of pressure and processing, the measurement of mercury volume is also finished by computing machine entirely automatically.
3. differential pressure method is measured the mercury volume.Its measuring principle is to utilize different liquid-column heights to produce different pressure to measure, i.e. P=ρ * g * h.As shown in Figure 2, the lower end 17 of mercury cubing pipe 14 connects the high pressure chest 20 of differential pressure pick-up 12, the upper end 18 of mercury cubing pipe 14 connects the low-pressure cavity 21 of differential pressure pick-up 12, be full of mercury in the lower end 17 of pipeline 22 that links to each other with high pressure chest 20 and high pressure chest 20 and mercury cubing pipe 14, be full of alcohol in the upper end 18 of pipeline 19 that links to each other with low-pressure cavity 21 and low-pressure cavity 21 and mercury cubing pipe 14, at this moment, the reading Δ P=(ρ of differential pressure pick-up 12
Mercury-ρ
Alcohol) * g * h, thus release the h value, mercury volume V=h * A, wherein A represents mercury cubing pipe 14 endoporus areas.Select for use the differential pressure pick-up of precision 0.1% just can guarantee the accuracy requirement that the mercury volume is tested fully.
4. use alcohol to make pressure transmission medium, can guarantee the cleaning of pipeline, prevent corrosion, so do not need frequent cleaning, because all tests are all carried out, need not to change core chamber in addition in a core chamber, thereby the chance that reduces a staff and contact with mercury reduces the harm of mercury to human body.
5. series connection staged measuring method is adopted in pressure survey, be connected in series by the range order as pressure transducer in Fig. 15,6,7, pressure source is connected on calibration device for high range pressure transducer 5 one ends, between calibration device for high range pressure transducer 5 and the middle range pressure sensor 6, be connected to solenoid valve 8 and 9 respectively between middle range pressure sensor 6 and the lower range pressure transducer 7, solenoid valve 8,9 is controlled break-make by its switch of computer control.During beginning, earlier solenoid valve 8,9 is opened, during low pressure, the pressure of record is as the criterion with the reading of lower range pressure transducer 7, when system pressure during near the 80%-90% of lower range pressure transducer 7 ranges, solenoid valve 9 cuts out, and cuts off getting in touch of lower range pressure transducer 7 and high-pressure section, and the pressure of record is as the criterion with the reading of middle range pressure sensor 6, by that analogy.Counteragent during mercury ejection, the measurement of pressure can be uninterrupted continuously like this, and the pressure data that makes record is all at the interlude (the interlude linear ratio two ends of sensor will be got well) of transducer range, thereby improves the accuracy of measuring.
Claims (3)
1. differential pressure method mercury injection apparatus, utilize differential pressure pick-up to measure the Trace Mercury volume, pressure transducer is connected in series, staged is measured, the supercharging decompression of pump, the measurement of pressure and balance are judged, the switch of solenoid valve, data processing is finished automatically by computing machine, it is characterized in that: core chamber, mercury cubing pipe, the U type is communicated with between the mercury supplementing cup three, on the pipeline between any two high-pressure valve is housed, and the position of core chamber is higher than initial mercury solution face position in the measuring tube, the mercury supplementing cup adjustable height, the core chamber top connects vacuum pump, and the lower end of mercury cubing pipe connects the high pressure chest of differential pressure pick-up, is full of mercury in its pipeline and the high pressure chest; Three tunnel low-pressure cavity, pressure measurement unit and the high-pressure plunger pumps that connect differential pressure pick-up are respectively divided in the upper end of mercury cubing pipe, are full of alcohol in its pipeline and the low-pressure cavity, between high, medium and low range pressure sensor solenoid valve are housed.
2. differential pressure method mercury injection apparatus according to claim 1, it is characterized in that: the on-site atmospheric numerical value of representing with height of mercury when the difference in height in the tip position of core chamber and the mercury cubing pipe between the position of initial mercury face is equal to the instrument use, this numerical value is set up by the height of regulating mercury supplementing cup.
3. differential pressure method mercury injection apparatus according to claim 1 is characterized in that: pressure transducer is connected in series by the range order, and pressure source is connected on sensor one end of range maximum, and the solenoid valve between sensor and the sensor is by its break-make of computer control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03216204 CN2606349Y (en) | 2003-04-07 | 2003-04-07 | Pressure differential mercury instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03216204 CN2606349Y (en) | 2003-04-07 | 2003-04-07 | Pressure differential mercury instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2606349Y true CN2606349Y (en) | 2004-03-10 |
Family
ID=34160668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03216204 Expired - Fee Related CN2606349Y (en) | 2003-04-07 | 2003-04-07 | Pressure differential mercury instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2606349Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504350B (en) * | 2009-03-13 | 2011-01-26 | 厦门大学 | Method for sealing sample room of mercury porosimeter |
| CN101634599B (en) * | 2009-08-17 | 2011-04-06 | 何志明 | Measurement method of mercury vapor pressure |
| CN105842138A (en) * | 2016-03-25 | 2016-08-10 | 南通市飞宇石油科技开发有限公司 | Mercury column interface automatic regulation system and rock core pore structure measuring instrument |
| CN107748125A (en) * | 2017-08-30 | 2018-03-02 | 中国石油化工股份有限公司 | Intrusive mercury curve measurement system and assay method based on liquid level constant method |
| CN109410726A (en) * | 2018-09-17 | 2019-03-01 | 中国石油大学(华东) | A kind of interactive pressure mercury capillary pressure curve virtual simulation test tutoring system and its operation method |
-
2003
- 2003-04-07 CN CN 03216204 patent/CN2606349Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504350B (en) * | 2009-03-13 | 2011-01-26 | 厦门大学 | Method for sealing sample room of mercury porosimeter |
| CN101634599B (en) * | 2009-08-17 | 2011-04-06 | 何志明 | Measurement method of mercury vapor pressure |
| CN105842138A (en) * | 2016-03-25 | 2016-08-10 | 南通市飞宇石油科技开发有限公司 | Mercury column interface automatic regulation system and rock core pore structure measuring instrument |
| CN105842138B (en) * | 2016-03-25 | 2018-11-16 | 南通市飞宇石油科技开发有限公司 | A kind of mercury column interface automatic regulating system and rock core pore structure analyzer |
| CN107748125A (en) * | 2017-08-30 | 2018-03-02 | 中国石油化工股份有限公司 | Intrusive mercury curve measurement system and assay method based on liquid level constant method |
| CN109410726A (en) * | 2018-09-17 | 2019-03-01 | 中国石油大学(华东) | A kind of interactive pressure mercury capillary pressure curve virtual simulation test tutoring system and its operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |