CN101082598A - Oil pad interface detector - Google Patents
Oil pad interface detector Download PDFInfo
- Publication number
- CN101082598A CN101082598A CN 200610083719 CN200610083719A CN101082598A CN 101082598 A CN101082598 A CN 101082598A CN 200610083719 CN200610083719 CN 200610083719 CN 200610083719 A CN200610083719 A CN 200610083719A CN 101082598 A CN101082598 A CN 101082598A
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- Prior art keywords
- detecting sensor
- pad interface
- contact
- oil pad
- intervalve
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- 238000005259 measurement Methods 0.000 claims abstract description 13
- 241001131796 Botaurus stellaris Species 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 239000012267 brine Substances 0.000 abstract 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 description 20
- 238000000034 method Methods 0.000 description 17
- 229910001220 stainless steel Inorganic materials 0.000 description 16
- 239000010935 stainless steel Substances 0.000 description 16
- 230000001050 lubricating effect Effects 0.000 description 12
- 239000012266 salt solution Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 9
- 239000002283 diesel fuel Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 229920006351 engineering plastic Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001455 metallic ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
An oil pad interface detector used in a cavity manufacturing process of a natural gas salt cavern gas storage comprises an intermediate pipe (1), a detection sensor (5), a contact (6) and the like, wherein ground equipment (4) is respectively connected with the intermediate pipe (1) and the detection sensor (5) through a cable core (3), the contact (6) is arranged on the detection sensor (5), and the characteristic that the internal resistance of a constant current source circuit changes along with voltage is utilized, so that the influence of resistance change caused by the brine density change of a medium to be detected is effectively overcome, and the requirement of measurement precision is ensured; in the design of a circuit system, the positive electrode of a system power supply is connected with a middle tube, so that the point is not influenced by the dissolution of an electrolytic reaction anode; the normally open button switch is connected in series in the power supply loop in a non-continuous measurement mode, so that the dissolution of an electrolytic reaction on the intermediate pipe is reduced, the measurement precision is high, the service life is long, and the requirement of long-term oil pad interface detection in the cavity manufacturing process of the natural gas salt cavern gas storage can be met.
Description
Technical field:
The invention belongs to the rock gas salt hole air reserved storeroom and make testing tool in the process of chamber, specifically, is a kind of oil pad interface detector.
Background technology:
The rock gas salt hole air reserved storeroom is made in the process of chamber, by pipe core by ground to down-hole salt deposit water filling, the annular space of asking by pipe core and intervalve is to extracted out the bittern that contains the dissolving salt composition earthward by the down-hole salt deposit.Along with constantly carrying out of this process, the salt in the salt deposit of down-hole is constantly dissolved and be sent to ground, forms hole and constantly increase in the salt deposit, and the volume until this salt cave reaches designing requirement.Make in the process of chamber, not only will control the volume in salt cave, will guarantee that also the bottom of salt deposit and top do not worn by molten, in order to avoid leak when causing natural gas-storing.For reaching this purpose, inject diesel oil as resistance solvent by the annular space between intervalve and the sleeve pipe to the down-hole, be called lubricating pad.Because lubricating pad proportion is less than bittern, lubricating pad is in the bittern top, by regulating the height at interface between lubricating pad and the bittern, i.e. and the shape in the molten chamber of may command and protect the bottom of salt deposit and top not to be worn by molten.Interface location determines that prior art is to realize by calculation of parameter such as the volume of annular space between the volume of molten cavity in the sixth of the twelve Earthly Branches, intervalve and the sleeve pipe, diesel oil density and injection diesel oil amounts between lubricating pad and the bittern.Since above-mentioned parameter especially the sixth of the twelve Earthly Branches molten cavity volume be difficult to accurate acquisition, more since molten chamber process in the sixth of the twelve Earthly Branches molten cavity volume be in the variation, calculate lubricating pad and the bigger error of the inevitable existence of the interface location between the bittern that obtains by above-mentioned parameter, be difficult to satisfy the rock gas salt hole air reserved storeroom and make the chamber requirement of engineering precision.
Summary of the invention:
The object of the present invention is to provide a kind of rock gas salt hole air reserved storeroom that can improve to make the accuracy requirement of determining interface location between lubricating pad and the bittern in the engineering of chamber, and make the oil pad interface detector that can effectively use in the process of chamber as the rock gas salt hole air reserved storeroom.
The present invention is achieved in that by uphole equipment, sheathed cable and detecting sensor and forms that uphole equipment links to each other by sheathed cable with the detecting sensor that is positioned at the down-hole.Comprise power supply, reometer and pushbutton switch in the uphole equipment.Sheathed cable is a single core cable.Detecting sensor is an elongated cylindrical, is fixed on the intervalve bottom outside.Detecting sensor reaches constant-current source circuit tens of even that reach hundreds of end parallel connections by quantity and forms.All constant-current source circuit parallel end connection sheathed cable heart yearns, each constant-current source circuit other end then connect respectively be positioned at the detecting sensor surface, spacing is 10-20 centimetre stainless steel contact each other.Be the lubricating pad (diesel oil) of insulator for measured medium between stainless steel contact and the intervalve or be the bittern of conductor (salt solution).Power positive end in the uphole equipment connects intervalve through reometer, pushbutton switch, power-termination sheathed cable heart yearn.When carrying out the oil pad interface detection, press the button switch connection and detect the loop, to connect measured medium between stainless steel contact and the intervalve be that the constant-current source circuit no current of lubricating pad (diesel oil) passes through, and to connect measured medium between stainless steel contact and the intervalve be that the constant-current source circuit of bittern (salt solution) has steady current to pass through.The current value that reads by reometer in the uphole equipment is divided by the constant current value of constant-current source circuit, can calculate the constant-current source circuit number of conducting, again the constant-current source circuit number of conducting be multiply by the spacing between the stainless steel contact, can obtain the oil pad interface height value, realize the measurement of oil pad interface.
The invention has the advantages that: detecting sensor uses constant-current source circuit as testing circuit, utilize the characteristics of constant-current source circuit internal resistance with change in voltage, overcome the influence of the deep or light variation of the measured medium bittern resistance variations that causes effectively, guaranteed the requirement of measuring accuracy.The system power supply positive pole connects intervalve in Circuits System design, makes the stainless steel contact of survey sensor not be subjected to the influence of electrolytic reaction anodic solution.The serial connection normally open push button switch is taked the non-continuous mode in the electric power loop, has reduced the dissolving of electrolytic reaction to intervalve.Owing in system design, taked above measure, the utility model measuring accuracy height, long service life can satisfy the rock gas salt hole air reserved storeroom and make the chamber process midium or long term and carry out the requirement that oil pad interface detects.The utility model is simple in structure, and low cost of manufacture is easy to install, and makes in the process of chamber widespread use for it at the rock gas salt hole air reserved storeroom and has created condition.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is an electric principle assumption diagram of the present invention.
Embodiment
As shown in Figure 1, comprise intervalve 1, support 2, cable core 3, uphole equipment 4, detecting sensor 5, contact 6, intervalve is fixedlyed connected with support 2, detecting sensor 5 is connected with support 2, uphole equipment 4 is connected with intervalve 1, detecting sensor 5 by cable core 3 respectively, is provided with contact 6 on detecting sensor 5.
Detecting sensor 5 is a right cylinder, diameter is general≤and 20 millimeters.
The number of detecting sensor 5 〉=1.
The number of contact 6 〉=1, contact 6 is a disc, and 6～7 millimeters of diameters are embedded on the surface of survey sensor 5, and the inboard is linked to each other with corresponding constant-current source circuit by lead, and the outside is in the surface of detecting sensor 5.
Be filled with bittern between contact 6 on the detecting sensor 5 and the intervalve 1.
Each measurement point on the detecting sensor 5 is made of identical constant-current source circuit and a contact 6.
Testing circuit on the detecting sensor adopts the constant-current source circuit that is made of adjustable voltage adjuster LM317 of three ends and current-limiting resistance R to form this circuit input end V
INContact point 6, output terminal V
OUTAfter current-limiting resistance R and adjustable side ADJ converge, lead to and measure cable.
As shown in Figure 2, the rock gas salt hole air reserved storeroom is made in the process of chamber, and the variation range of interfacial level can reach several meters to tens of rice between lubricating pad and the bittern, and the utility model is for adapting to the requirement of measurement range, and detecting sensor 5 adopts multiple spot continuous coverage mode to measure.The gap is generally 10～20 centimetres between two measurement points, can set according to the needs of measuring accuracy.Consider the facility of processing and manufacturing, transportation and installation, the downhole detection sensor 5 general merogenesis processing and manufacturings of oil pad interface detector, general long two meters of every joint has 10～20 measurement points on every joint.Install in the process of going into the well at the downhole detection sensor, interfacial level scope between lubricating pad of Jian Ceing and the bittern as required, detecting sensor 5 joint numbers of serial connection necessary amount are to satisfy interfacial level detection requirement.Every joint survey sensor all uses engineering plastics to make, and every joint detecting sensor of making 5 is right cylinder, and diameter generally is not more than 20 millimeters, only to guarantee to be lowered to smoothly between intervalve and the sleeve pipe in more than 30 millimeter the annular space.Each measurement point on the detecting sensor 5 is made of identical constant-current source circuit and a stainless steel contact 6.Constant-current source circuit is sealed in the engineering plastics, seals the withstand voltage 15MP that reaches, with guarantee survey sensor 5 surpass 1000 meters well depth salt hole air reserved storerooms make in the hyperbaric environment of chamber process can be reliably and with long-term work.Stainless steel contact 6 is a disc, 6～7 millimeters of diameters are embedded on detecting sensor 5 surfaces of being made by engineering plastics, and the inboard is linked to each other with corresponding constant-current source circuit by lead, the outside is in the surface of detecting sensor 5, can directly contact with measured medium lubricating pad or bittern and measure.
Theoretical and the test detection according to electricity when being full of bittern (salt solution) between stainless steel contact 6 on the detecting sensor 5 and the intervalve 1, has resistance to exist between the two.The value of this resistance is directly proportional with distance between the two, is inversely proportional to the concentration of bittern (salt solution).The rock gas salt hole air reserved storeroom is made in the process of chamber, detecting sensor 5 and as the constant distance between the intervalve 1 of public electrode, thereby this resistance only the concentration with bittern (salt solution) is relevant.Owing to make the concentration of bittern in the process of chamber (salt solution) is often to change, thereby the value of this resistance also is often to change.In order to guarantee to measure the influence that electric current is not subjected to this resistance between stainless steel contact 6 and the intervalve 1, must be on the circuit design of detecting sensor 5, make the circuit internal resistance have automatic regulatory function, make when being in conducting state between stainless steel contact 6 and the intervalve 1, be not subjected to the influence of the concentration of bittern (salt solution) by the measurement electric current between the two, keep steady state value constant.
Chat purpose on reaching, the testing circuit on the detecting sensor 5 adopts the constant-current source circuit that is made of adjustable voltage adjuster LM317 of three ends and current-limiting resistance R to form this circuit input end V
INConnect stainless steel contact 6, output terminal V
OUTAfter current-limiting resistance R and adjustable side ADJ converge, lead to and measure cable.Constant-current source circuit output current I
OUT=1.2/R.Be influence and the detecting sensor 5 overall measurement electric currents that reduce electrolytic reaction, the value of getting current-limiting resistance R in fact is 240 Ω, then I
OUT=4mA.The voltage regulation factor of the adjustable voltage adjuster LM317 of three ends is: 3V≤(V
IN-V
OUT)≤40V, when power supply in the equipment of ground with 40V voltage during to the power supply of the testing circuit (constant-current source circuit) of detecting sensor, the internal resistance variation range maximal value of testing circuit (constant-current source circuit) is (40V-3V)/4mA=9.25K Ω.According to test, to cause between stainless steel contact 6 and the intervalve 1 conductive resistance be that tens of ohms are to hundreds of ohms in the variation of bittern (salt solution) concentration between stainless steel contact 6 on the detecting sensor 5 and the intervalve 1, much smaller than the variation range of the internal resistance 9.25K Ω of testing circuit (constant-current source circuit), thus testing circuit (constant-current source circuit) when between stainless steel contact 6 and intervalve 1, being full of bittern (salt solution) 4mA measure electric current and can keep invariable.
In the oil pad interface testing process, because of being arranged, electric current passes through bittern (salt solution), electrolytic reaction must take place, the own betatopic of anode material during electrolysis and become the metallic ion anodic solution.Stream time was the longest after the detecting sensor 5 of oil pad interface detector was installed and gone into the well reaches 3 years, for avoiding stainless steel contact 6 dissolving disappearance gradually in long-term oil pad interface testing process on the detecting sensor 5, consider that simultaneously will dissolve the infringement that intervalve is caused alleviates to bottom line, has taked following two technical measures in the design of circuit system:
1, with the positive termination intervalve of system's power supply, negative terminal connects cable core.The polarity of all constant-current source circuits is pressed the connection of power supply direction in the survey sensor.In this case, intervalve is an anode when in the oil pad interface testing process electrolytic reaction taking place, because the metal volume of intervalve 1 is big, thereby anodic solution is less to the influence that intervalve 1 causes, and oil pad interface detector is operate as normal for a long time.
2, oil pad interface is in more stable state, does not need continuous monitoring, so has been connected in series normally open push button switch in the measurement loop in the circuit design, only presses normally open push button switch when needs are monitored and monitors.This working method has significantly reduced system's electrical working time, the corresponding minimizing of time of anodic solution takes place on the intervalve, thereby anodic solution is controlled to the infringement that intervalve causes.
Claims (8)
1, oil pad interface detector, comprise intervalve (1), support (2), cable core (3), uphole equipment (4), detecting sensor (5), contact (6), it is characterized in that: intervalve (1) is fixedlyed connected with support (2), detecting sensor (5) is connected with support (2), uphole equipment (4) is connected with intervalve (1), detecting sensor (5) by cable core (3) respectively, is provided with contact (6) on detecting sensor (5).
2, oil pad interface detector according to claim 1 is characterized in that: detecting sensor (5) is a right cylinder, diameter≤20 millimeter.
3, oil pad interface detector according to claim 1 is characterized in that: number 〉=1 of detecting sensor (5).
4, oil pad interface detector according to claim 1, it is characterized in that: number 〉=1 of contact (6), each contact (6) is a disc, 6～7 millimeters of its diameters, be embedded on the surface of survey sensor (5), the inboard is linked to each other with corresponding constant-current source circuit by lead, and the outside is in the surface of detecting sensor (5).
5, oil pad interface detector according to claim 1 is characterized in that: be filled with bittern between contact (6) on the detecting sensor (5) and the intervalve (1).
6, oil pad interface detector according to claim 1 is characterized in that: each measurement point on the detecting sensor (5) is made of an identical constant-current source circuit and a contact (6).
7, oil pad interface detector according to claim 1 is characterized in that: uphole equipment (4) is made up of power switch (41), pushbutton switch (42), reometer (43), voltage table (44).
8, oil pad interface detector according to claim 1 is characterized in that: the testing circuit of (5) adopts the constant-current source circuit that is made of adjustable voltage adjuster LM317 of three ends and current-limiting resistance R to form this circuit input end V on the detecting sensor
INContact point 6, output terminal V
OUTAfter current-limiting resistance R and adjustable side ADJ converge, lead to and measure cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100837191A CN101082598B (en) | 2006-06-02 | 2006-06-02 | Oil pad interface detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100837191A CN101082598B (en) | 2006-06-02 | 2006-06-02 | Oil pad interface detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101082598A true CN101082598A (en) | 2007-12-05 |
| CN101082598B CN101082598B (en) | 2011-04-20 |
Family
ID=38912279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100837191A Expired - Fee Related CN101082598B (en) | 2006-06-02 | 2006-06-02 | Oil pad interface detector |
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| Country | Link |
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| CN (1) | CN101082598B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501906A (en) * | 2014-12-30 | 2015-04-08 | 中国石油天然气集团公司 | Series resistance type underground oil-water interface detection system controlled by pressure-controlled switch |
| CN104614041A (en) * | 2014-12-30 | 2015-05-13 | 中国石油天然气集团公司 | Series-parallel connection type underground oil-water interface detecting system controlled by pressure control switch |
| CN106197605A (en) * | 2015-05-04 | 2016-12-07 | 中国石油天然气集团公司 | Oil-water interfaces detecting system and the method in chamber is made for salt hole air reserved storeroom |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2062445U (en) * | 1990-03-07 | 1990-09-19 | 于践 | Oil and water interface sensor |
| CN2132166Y (en) * | 1992-08-13 | 1993-05-05 | 汤广武 | Interface variable dilivery device |
| CN2170506Y (en) * | 1993-04-06 | 1994-06-29 | 鞍钢矿山公司质计处计控工程公司 | Multi-parameter monitor for liquid tank |
| CN1112677A (en) * | 1994-05-25 | 1995-11-29 | 刘瑞复 | High precision instrument for testing water content of crude oil by impedance method |
| CN2414399Y (en) * | 2000-03-10 | 2001-01-10 | 王连顺 | Liquid level boundary meter |
| CN2581693Y (en) * | 2002-11-12 | 2003-10-22 | 辽河石油勘探局井下作业公司 | Underground oil-water interface testing device |
| CN1506666A (en) * | 2002-12-13 | 2004-06-23 | 上海特晟商贸有限公司 | Oil-water interface and oil surface measuring instrument |
| US7049622B1 (en) * | 2004-04-09 | 2006-05-23 | Sandia Corporation | Optical position sensor for determining the interface between a clear and an opaque fluid |
| CN2924530Y (en) * | 2006-06-02 | 2007-07-18 | 中国石油天然气股份有限公司 | Oil-water interface detection sensor |
-
2006
- 2006-06-02 CN CN2006100837191A patent/CN101082598B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501906A (en) * | 2014-12-30 | 2015-04-08 | 中国石油天然气集团公司 | Series resistance type underground oil-water interface detection system controlled by pressure-controlled switch |
| CN104614041A (en) * | 2014-12-30 | 2015-05-13 | 中国石油天然气集团公司 | Series-parallel connection type underground oil-water interface detecting system controlled by pressure control switch |
| CN106197605A (en) * | 2015-05-04 | 2016-12-07 | 中国石油天然气集团公司 | Oil-water interfaces detecting system and the method in chamber is made for salt hole air reserved storeroom |
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| Publication number | Publication date |
|---|---|
| CN101082598B (en) | 2011-04-20 |
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Effective date of registration: 20210302 Address after: 100120 Xicheng District six paw Kang in Beijing City Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Address before: 100011 Beijing Dongcheng District andelu interstate 16 building Patentee before: PetroChina Company Limited |
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