CN204371329U - A kind of straight well downhole wet steam flow dryness measurement device - Google Patents
A kind of straight well downhole wet steam flow dryness measurement device Download PDFInfo
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- CN204371329U CN204371329U CN201420681436.7U CN201420681436U CN204371329U CN 204371329 U CN204371329 U CN 204371329U CN 201420681436 U CN201420681436 U CN 201420681436U CN 204371329 U CN204371329 U CN 204371329U
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Abstract
The utility model provides a kind of straight well downhole wet steam flow dryness measurement device, comprise data acquisition circuit, sensor circuit connector, temperature pick up, pressure probe, blade turbine sensor, steam quality measuring transducer, described data acquisition circuit, sensor circuit connector is interconnected rear integral sealing in adiabatic heat-insulation bottle, bottom described adiabatic heat-insulation bottle, dewar bottle plug is set, and dewar bottle plug connects instrument seal receptacle again, the temperature pick up be connected with sensor circuit connector is set in described instrument seal receptacle, pressure probe, the blade turbine sensor be connected with sensor circuit connector is also set gradually bottom described instrument seal receptacle, steam quality measuring transducer.The utility model measuring accuracy is high, and test data is accurate, removes technique convenient.
Description
Technical field
The utility model relates to the measuring technique of the various parameter of steam in steam injection pit shaft and oil reservoir in heavy crude heat extraction process, specifically a kind of straight well downhole wet steam flow dryness measurement device.
Background technology
China's heavy oil reserves is very abundant, utilizes Thermal Recovery For Viscous Oil By Steam to be a kind of important method of oil recovery by heating, wherein injects the flow of steam and mass dryness fraction and plays a very important role oil well production increasing and increasing economic efficiency.It is commonly use effective development scheme for the one of thickened oil recovery at present that steam incoming and outcoming and steam drive, the moist steam of being produced by injection boiler is transported to thermal production well mouth by surface line, the oil reservoir needing heating is transported to again by steam injection heat-proof string, the down-hole steam injecting temperature of steamed well, pressure, flow, mass dryness fraction is, along with well depth change, corresponding change occurs, enter steam flow after oil reservoir simultaneously, also corresponding change is there is in the parameters such as mass dryness fraction according to reservoir parameter, therefore dynamically grasp wellbore heat loss situation and the suction vapour situation entering each oil reservoir effectively can improve the development effectiveness of heavy crude reservoir, the output of development degree and viscous crude.
Utility model content
The purpose of this utility model is to provide a kind of straight well downhole wet steam flow dryness measurement device, and measuring accuracy is high, and test data is accurate, removes technique convenient.
The purpose of this utility model realizes by following technical measures:
This straight well downhole wet steam flow dryness measurement device comprises data acquisition circuit, sensor circuit connector, temperature pick up, pressure probe, blade turbine sensor, steam quality measuring transducer, described data acquisition circuit, sensor circuit connector is interconnected rear integral sealing in adiabatic heat-insulation bottle, bottom described adiabatic heat-insulation bottle, dewar bottle plug is set, and dewar bottle plug connects instrument seal receptacle again, the temperature pick up be connected with sensor circuit connector is set in described instrument seal receptacle, pressure probe, the blade turbine sensor be connected with sensor circuit connector is also set gradually bottom described instrument seal receptacle, steam quality measuring transducer.
The purpose of this utility model also realizes by following technical measures:
Described steam quality measuring transducer comprises porous wall, specific retention test probe, and described specific retention test probe empty set is inner at porous wall, and forms expansion chamber between the two, and described specific retention test probe upper end forms steam channel, and lower end is then aquaporin.
Described steam quality measuring transducer lower end is also connected with righting-oriented device, and described instrument seal receptacle connects blade turbine sensor by secondary speed tongue tube.
Described adiabatic heat-insulation bottle outer cover has the outer stainless steel protection shell of an instrument.
Also connect a pressure cap bottom described dewar bottle plug, have conical surface seal groove between dewar bottle plug and instrument seal receptacle, install metallic gasket in groove, described pressure cap is dewar bottle plug and instrument seal receptacle press seal.
The outer stainless steel protection shell upper end of described instrument connects rope socket by plug.
Described data acquisition circuit comprise pressure acquisition module for receiving the pressure value signal that pressure sensor records, for receive the temperature signal that temperature pick up produces temperature collect module, for receive the mass dryness fraction signal that steam quality measuring transducer records the capacitance type water cut acquisition module carrying out dryness measurement, for receiving the turbine type flow acquisition module of the data that blade turbine sensor records, turbine sensor measurement result can realize the accurate measurement of mass flow in conjunction with dryness measurement data.
The utility model has following beneficial effect:
The utility model comprise rope socket, measuring section, be connected to measuring section bottom soaking zone, be connected to the adiabatic section of soaking zone bottom and be arranged in the data acquisition storage system of adiabatic section, described measuring section comprise longitudinally be arranged in order along tester, for testing the pressure sensor of different longitudinal position, and temperature pick up, turbine sensor and specific retention probe, described data acquisition storage system comprises the pressure acquisition module for receiving the pressure value signal that one of them pressure sensor records; For receiving the temperature collect module of the temperature signal that thermal resistance produces; For the new liquid electrode capacitance formula specific retention acquisition module by heavy potential difference design of dryness measurement; For flow measurement is turbine type flow acquisition module, this turbine sensor measurement result can realize the accurate measurement of mass flow in conjunction with dryness measurement data, instead of at present on-the-spot adopt calculate mass dryness fraction then at the underground steam flow of conversion mass dryness fraction, mass dryness fraction, temperature, pressure four parameter testing technology and instrument according to Two-phase flow's separation.
Flow measurement range 0t/h-18t/h, precision is better than 6%; 2, dryness measurement scope: 0-100%, precision is better than 6%; 3, pressure measurement range 0-22MPa, precision is better than 0.5%; 4, temperature measurement range: 0-374 DEG C, precision is better than 0.2%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the steam quality measuring transducer structural representation of Fig. 1;
Fig. 3 is that data acquisition circuit module principle connects block diagram.
In figure, 1, rope socket; 2, plug; 3, the outer stainless steel protection shell of instrument; 4, adiabatic heat-insulation bottle; 5, data acquisition circuit; 6, sensor circuit connector; 7, instrument seal receptacle; 8, dewar bottle plug; 9, metallic gasket; 10, pressure cap; 11, temperature pick up; 12 pressure probes; 13 secondary speed tongue tubes; 14 blade turbine sensors; 15 steam quality measuring transducers; 16 righting-oriented devices.
151, insulated tubing or production string; 152, porous wall; 153, expansion chamber; 154 steam channels; 155, specific retention test probe; 156, aquaporin.
Detailed description of the invention
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the utility model.
With reference to figure 1, Fig. 2, shown in Fig. 3, straight well downhole wet steam flow dryness measurement device, piano wire is fixed on rope socket 1 li by the mode of knotting, then data acquisition circuit 5 is connected to sensor circuit connector 6 place, then adiabatic heat-insulation bottle 4 will be placed in upper part, this dewar bottle rear end is sealed by dewar bottle plug 8, then the outer stainless steel protection shell 3 of instrument will be placed in upper part, now instrument seal receptacle 7 and metallic gasket 9 are compressed by pressure cap 10, thus by the Acquisition Circuit of entirety not heatproof, protect in the seal parts such as battery and metal heat insulation bottle 4.Instrument seal receptacle 7 is connected to temperature pick up 11 respectively from pressure cap 10 part extensive protection part; pressure probe 12 and rear end secondary speed tongue tube 13 and blade turbine sensor 14, steam quality measuring transducer 15 and the righting-oriented device 16 for entering guiding and centralizing function in process under straight well, constitute novel oil field straight well downhole wet vapor (steam) temperature, pressure, flow, mass dryness fraction tester.Described data acquisition circuit comprise pressure acquisition module for receiving the pressure value signal that pressure sensor records, for receive the temperature signal that temperature pick up produces temperature collect module, for receive the mass dryness fraction signal that steam quality measuring transducer records the capacitance type water cut acquisition module carrying out dryness measurement, for receiving the turbine type flow acquisition module of the data that blade turbine sensor records, turbine sensor measurement result can realize the accurate measurement of mass flow in conjunction with dryness measurement data.
Wherein steam quality measuring transducer belongs to core innovative part, its test philosophy and method as follows:
Steam quality is measured: when the steam in oil field gas injection moist steam and water flow through 15 steam quality measuring transducer, conducting liquid (conductive phase) is while contact with the insulating layer of anode surface, while be connected with liquid electrode electric capacity water cut meter shell connector, now the insulating layer on anode cylindrical metal, positive plate surface and conducting liquid three just constitute a capacitor.Vapor phase in moist steam then can not form similar capacitor, and they contact formed electric capacity to the capacitance of sensor almost without contributing with positive plate.By capacitor principle, effective polar plate area of this capacitor just equals the contact area between conducting liquid and positive plate surface insulation layer, so the capacitance of sensor is
In formula, ε is the dielectric constant of insulating layer, and A is total contact area of water and anode, and d is the thickness of insulating layer.As can be seen from the above equation, because insulating layer d is very little, the capacitance surveyed reaches the nanofarad order of magnitude, highly sensitive.In design process, anode has 300mm length in the flowing direction, for measuring circuit leaves enough response times, ensure that certainty of measurement and range of application.Fundamentally solve a dryness measurement difficult problem in moist steam measuring process, solve null offset and anti-interference problem simultaneously, the mass dryness fraction of measurement and two phase flow of damp steam flow pattern and size factor in steam injection pit shaft have nothing to do.
Fig. 2 is a kind of tester structure when being less than 28 DEG C for steam injection pit shaft hole deviation and method.Whole measurement mechanism is suspended on steel wire, can move up and down in insulated tubing or production string 1.Specific retention test probe 5 is positioned at the center of steam quality measuring transducer, and the toroidal cavity between the outer wall of specific retention test probe 5 and the inwall of porous wall 2 then constitutes expansion chamber 3.Be connected with aquaporin 6 by steam channel 4 between specific retention test probe 5 with expansion chamber 3.Porous wall 2 is still between runner 1 and expansion chamber 3, also plays tester shell simultaneously.Opening area in addition on porous wall 2 is lower than the height of expansion chamber, respectively reserves the region of one section of not perforate in top and bottom, so that light phase steam and heavy phase water are assembled in the upper and lower of expansion chamber respectively.
Flow measurement of steam: the rotating speed of turbine is detected by the sensor coil be contained in outside casing. when the magnetic line of force that turbo blade cutting is produced by permanent-magnet steel in housing, the flux change in sensor coil will be caused. the magnetic flux mechanical periodicity signal detected is sent into preamplifier by sensor coil, signal is amplified, shaping, produce the pulse signal be directly proportional to flow velocity, feeding unit conversion and flow accumulation circuit obtain and show cumulative flow value; Also pulse signal is sent into frequency-current conversion circuit simultaneously, convert pulse signal to simulation current flow, and then instruction instantaneous delivery value.The mass dryness fraction data converted by the specific retention probe measurement on this instrument, in conjunction with the pressure data of apparatus measures, temperature data and caliber can obtain the two-phase mass flow of now steam.
Pressure measxurement: adopt conventional oil well pressure sensor to measure.
Temperature survey: adopt thermal resistance thermometer to carry out downhole temperature measurement.
The foregoing is only preferred embodiment of the present utility model, be not used to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (7)
1. a straight well downhole wet steam flow dryness measurement device, it is characterized in that, comprise data acquisition circuit, sensor circuit connector, temperature pick up, pressure probe, blade turbine sensor, steam quality measuring transducer, described data acquisition circuit, sensor circuit connector is interconnected rear integral sealing in adiabatic heat-insulation bottle, bottom described adiabatic heat-insulation bottle, dewar bottle plug is set, and dewar bottle plug connects instrument seal receptacle again, the temperature pick up be connected with sensor circuit connector is set in described instrument seal receptacle, pressure probe, the blade turbine sensor be connected with sensor circuit connector is also set gradually bottom described instrument seal receptacle, steam quality measuring transducer.
2. a kind of straight well downhole wet steam flow dryness measurement device according to claim 1, it is characterized in that, described steam quality measuring transducer comprises porous wall, specific retention test probe, described specific retention test probe empty set is inner at porous wall, and form expansion chamber between the two, described specific retention test probe upper end forms steam channel, and lower end is then aquaporin.
3. a kind of straight well downhole wet steam flow dryness measurement device according to claim 1, it is characterized in that, described steam quality measuring transducer lower end is also connected with righting-oriented device, and described instrument seal receptacle connects blade turbine sensor by secondary speed tongue tube.
4. a kind of straight well downhole wet steam flow dryness measurement device according to claim 1, is characterized in that, described adiabatic heat-insulation bottle outer cover has the outer stainless steel protection shell of an instrument.
5. a kind of straight well downhole wet steam flow dryness measurement device according to claim 1, it is characterized in that, a pressure cap is also connected bottom described dewar bottle plug, there is between dewar bottle plug and instrument seal receptacle conical surface seal groove, install metallic gasket in groove, described pressure cap is dewar bottle plug and instrument seal receptacle press seal.
6. a kind of straight well downhole wet steam flow dryness measurement device according to claim 4, is characterized in that, the outer stainless steel protection shell upper end of described instrument connects rope socket by plug.
7. a kind of straight well downhole wet steam flow dryness measurement device according to claim 1, it is characterized in that, described data acquisition circuit comprises the pressure acquisition module for receiving the pressure value signal that pressure sensor records, for receiving the temperature collect module of the temperature signal that temperature pick up produces, for receiving the capacitance type water cut acquisition module carrying out dryness measurement of the mass dryness fraction signal that steam quality measuring transducer records, for receiving the turbine type flow acquisition module of the data that blade turbine sensor records, turbine sensor measurement result can realize the accurate measurement of mass flow in conjunction with dryness measurement data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420681436.7U CN204371329U (en) | 2014-11-10 | 2014-11-10 | A kind of straight well downhole wet steam flow dryness measurement device |
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| CN201420681436.7U CN204371329U (en) | 2014-11-10 | 2014-11-10 | A kind of straight well downhole wet steam flow dryness measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569653A (en) * | 2014-11-10 | 2016-05-11 | 中国石油化工股份有限公司 | Plumb shaft underground wet steam flow dryness measurement device and method |
| CN107389749A (en) * | 2017-08-04 | 2017-11-24 | 中国石油天然气股份有限公司 | Downhole Steam Dryness Measuring Device |
-
2014
- 2014-11-10 CN CN201420681436.7U patent/CN204371329U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569653A (en) * | 2014-11-10 | 2016-05-11 | 中国石油化工股份有限公司 | Plumb shaft underground wet steam flow dryness measurement device and method |
| CN107389749A (en) * | 2017-08-04 | 2017-11-24 | 中国石油天然气股份有限公司 | Downhole Steam Dryness Measuring Device |
| CN107389749B (en) * | 2017-08-04 | 2024-03-01 | 中国石油天然气股份有限公司 | Underground steam dryness measuring device |
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