CN106979005B - Working fluid level height sensor suitable for gas-liquid two-phase flow and use method thereof - Google Patents
Working fluid level height sensor suitable for gas-liquid two-phase flow and use method thereof Download PDFInfo
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- CN106979005B CN106979005B CN201710328194.1A CN201710328194A CN106979005B CN 106979005 B CN106979005 B CN 106979005B CN 201710328194 A CN201710328194 A CN 201710328194A CN 106979005 B CN106979005 B CN 106979005B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Abstract
The invention provides a working fluid level sensor suitable for gas-liquid two-phase flow, which comprises a sealing head, a sealing seat, an outer shell and a base which are sequentially connected, and further comprises a lead, a circuit board, a bubble probe, a temperature probe and a strain gauge, wherein the circuit board, the bubble probe and the temperature probe are all positioned in the outer shell, the strain gauge is positioned in the base, one end of the lead, the bubble probe, the strain gauge and the temperature probe are respectively connected with the circuit board, and the other end of the lead is connected with a terminal device. The invention also provides a using method of the working fluid level sensor, which comprises the following steps: placing an oil pipe provided with a working fluid level sensor below a working fluid level in the well to obtain a first height and the pressure of air at a well mouth; inputting the first elevation and a pressure of wellhead air to a terminal device; measuring to obtain fluid pressure and fluid average density; and calculating the height of the working fluid level. The invention can measure the height of the working fluid level in real time.
Description
Technical Field
The invention relates to the technical field of coal bed gas detection, in particular to a working fluid level height sensor suitable for gas-liquid two-phase flow and a using method thereof.
Background
The reserve of coal bed gas in China is rich, wherein the coal bed gas resource with the buried depth of less than 2000 m is 36.81 trillion cubic meters, which accounts for about 15.3 percent of the world, and the reserve is the third place of the world. In order to fully utilize coal bed gas resources, the research and development of coal bed gas mining technology is enhanced by our government in recent years, and a plurality of test wells are drilled to explore the complete set of technology of coal bed gas mining, but under the limitation of technical conditions, the number of coal bed gas mining wells in our country is still more than that of vertical wells.
For coal bed gas exploitation, due to the natural fracture development structure of a coal reservoir, a coal bed gas production well needs to be drained and depressurized, in the process, underground water and coal bed gas permeate into a shaft annulus together, and gas-liquid two-phase flow is formed in the shaft annulus, so that the working fluid level of the shaft annulus is increased; the coal bed gas permeating into the shaft annulus exists in the form of bubbles or gas columns and rises along the shaft, and the rising coal bed gas finally breaks away from the shaft annulus liquid level, so that the shaft annulus working fluid level is reduced; in addition, factors such as water gushing and water leakage of the stratum can also cause the working fluid level of the shaft annulus to change. Therefore, due to the existence of the complex factors, the working fluid level of the well bore annulus is dynamically changed, and thus the working fluid level is formed.
For a vertical well, the working fluid level height of the shaft annulus is one of important parameters for setting a drainage and production process, so the working fluid level height must be measured in real time, and common oil and gas well liquid level measurement methods comprise a float bowl measurement method, an echo detection method, a pressure detection method and the like.
Disclosure of Invention
In view of the above, the present invention provides a working fluid level sensor suitable for gas-liquid two-phase flow, which can measure the working fluid level in real time and improve the measurement accuracy, and also provides a method for measuring the working fluid level by using the working fluid level sensor.
The invention provides a working fluid level sensor suitable for gas-liquid two-phase flow, which comprises a sealing head, a sealing seat, an outer shell and a base which are sequentially connected, and further comprises a lead, a circuit board, a bubble probe, a temperature probe and a strain gauge, wherein the circuit board, the bubble probe and the temperature probe are all positioned in the outer shell, the strain gauge is positioned in the base, the lead, the bubble probe, the temperature probe and the strain gauge are respectively connected with the circuit board, the bubble probe is used for obtaining the average density of fluid, the strain gauge is used for measuring the pressure of the fluid, the temperature probe is used for measuring the temperature, and the temperature measured by the temperature probe is used for correcting the pressure measured by the strain gauge so as to eliminate the temperature drift of the strain gauge.
Further, the shell body includes shell body upper end and shell body lower extreme, the upper end threaded connection of sealed head and seal receptacle, the lower extreme and the shell body upper end threaded connection of seal receptacle, shell body lower extreme and base threaded connection, the junction of sealed head and seal receptacle is equipped with first rubber ring, the upper end of seal receptacle is equipped with the first recess that is used for placing first rubber ring, the junction of shell body upper end and seal receptacle is equipped with sealed the pad, be equipped with the second recess that is used for placing sealed the pad on the shell body upper end, the junction of shell body lower extreme and base is equipped with rubber seal, the shell body lower extreme is the echelonment, will rubber seal places the echelonment step department at the shell body lower extreme.
Furthermore, one end of the wire sequentially penetrates through center holes of the sealing head, the first rubber ring and the sealing seat to be connected with the circuit board, the first rubber ring is pressed at the joint of the sealing head and the sealing seat, so that the first rubber ring is tightly attached to the wire to seal the wire, and the other end of the wire is connected with the terminal equipment.
Furthermore, the internal connection of shell body is a cassette, the cassette is connected with the internal thread of shell body, processing has first screw thread blind hole on the cassette, be equipped with first through-hole on the circuit board, through insert the bolt can fix the circuit board on the cassette in first through-hole and first screw thread blind hole, the terminal surface processing of cassette has interior hexagonal recess to convenient adoption interior hexagonal spanner is unscrewed.
Further, connect a gland on the shell body, the shell body is equipped with the second rubber ring with the junction of gland be equipped with the third recess that is used for placing the second rubber ring on the shell body, processing has second screw thread blind hole and second through-hole on the shell body, the bubble probe passes in proper order and is connected with the circuit board behind gland, the centre bore and the second through-hole of second rubber ring, be equipped with the third through-hole on the gland, can be with gland fixed connection on the shell body through inserting the screw in third through-hole and second screw thread blind hole, thereby simultaneously the gland compresses tightly the second rubber ring and realizes the sealed to the bubble probe.
Furthermore, still connect a safety cover on the shell body, the safety cover is located the top of gland, be equipped with the fourth through-hole on the safety cover, can be with safety cover fixed connection on the shell body through inserting the screw in fourth through-hole and second screw thread blind hole, the safety cover is used for protecting the bubble probe.
Further, a fourth groove is processed in the base, a strain gauge with a waterproof function is placed in the fourth groove, a pressing ring is arranged above the strain gauge and located at the connecting position of the clamping seat and the inner portion of the outer shell, and the pressing ring is used for sealing the strain gauge.
Furthermore, a third threaded blind hole is processed on the circuit board, the temperature probe is screwed into the third threaded blind hole through threaded connection, so that the temperature probe is connected with the circuit board, and the circuit board is connected with a data processing circuit which is used for processing data detected by the strain gauge, the bubble probe and the temperature probe.
The invention also provides a use method of the working fluid level height sensor suitable for gas-liquid two-phase flow, which comprises the following steps:
installing the working fluid level sensor on an oil pipe, then placing the oil pipe provided with the working fluid level sensor below the working fluid level in the well to obtain a first height, wherein the first height is the depth from the installation position of the working fluid level sensor to the well head, and meanwhile, the pressure of the air at the well head is obtained;
inputting the first elevation and a pressure of wellhead air to a terminal device;
starting a dynamic liquid level sensor, measuring by using the strain gauge to obtain fluid pressure at the installation position of the dynamic liquid level sensor, obtaining the average density of fluid between the installation position of the dynamic liquid level sensor and the dynamic liquid level by using the bubble probe, and transmitting the fluid pressure and the average density to terminal equipment;
and the terminal equipment processes the received fluid pressure and the average density to obtain the working fluid level height.
Further, the working fluid level is obtained by the following steps:
calculating the pressure generated by the liquid at the mounting position of the working fluid level sensor, wherein the calculation formula of the pressure generated by the liquid at the mounting position of the working fluid level sensor is as follows:
P 2 ＝P 1 -P 0
in the formula, P 2 For the pressure of the liquid at the location of the mounting of the dynamic liquid level sensor, P 1 For measuring the fluid pressure, P, at the mounting position of the dynamic liquid level sensor by means of a strain gauge 0 The pressure of the wellhead air;
calculating a second height, wherein the second height is the depth of the working fluid level from the mounting position of the working fluid level height sensor, and the calculation formula of the second height is as follows:
h 2 ＝P 2 /ρg
in the formula, h 2 At a second height, ρ is the average density obtained with the bubble probe, g is the gravity constant;
calculating the height of the working fluid level, wherein the calculation formula of the height of the working fluid level is as follows:
h 3 ＝h 1 -h 2
in the formula, h 3 Is the working fluid level, h 1 Is a first height.
The technical scheme provided by the invention has the beneficial effects that:
1. the dynamic liquid level height sensor provided by the invention has a simple structure and is convenient to install, the first rubber ring is arranged at the joint of the sealing head and the sealing seat, the sealing gasket is arranged at the joint of the upper end of the outer shell and the sealing seat, and the rubber sealing ring is arranged at the joint of the lower end of the outer shell and the base, so that the sealing property of the dynamic liquid level height sensor is effectively ensured, and the potential safety hazard is reduced;
2. according to the invention, the first rubber ring is adopted to seal the lead, the second rubber ring is adopted to seal the bubble probe, meanwhile, the protective cover is adopted to protect the bubble probe, and the pressure ring is adopted to seal the strain gauge, so that the influence of fluid flow on the dynamic liquid level height sensor is avoided;
3. according to the invention, the temperature drift of the strain gauge can be effectively eliminated by correcting the pressure measured by the strain gauge through the temperature probe, the average density of the fluid is obtained by using the bubble probe, the error caused by the influence of the annular bubble section of the well casing is reduced, the problem of larger error of the height of the working fluid level of the bubble-containing section measured by the existing measuring method is effectively solved, and the measuring precision of the height of the working fluid level is improved;
4. the using method provided by the invention has simple steps and is convenient to calculate, and the height of the working fluid level can be measured in real time.
Drawings
FIG. 1 is a front view of a working fluid level sensor suitable for a two-phase gas-liquid flow in accordance with the present invention.
Fig. 2 is a right side view of a working fluid level sensor suitable for a two-phase gas-liquid flow in accordance with the present invention.
FIG. 3 is a top view of a working fluid level sensor suitable for use with a two-phase gas-liquid flow in accordance with the present invention.
FIG. 4 is a schematic cross-sectional view of a hydrodynamic level sensor suitable for use in a two-phase gas-liquid flow in accordance with the present invention.
Fig. 5 is a top view of a cartridge for a hydrodynamic level sensor suitable for two-phase gas-liquid flow in accordance with the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 5, an embodiment of the present invention provides a dynamic liquid level sensor suitable for gas-liquid two-phase flow, which includes a sealing head 1, a sealing seat 2, an outer shell 3 and a base 4 connected in sequence, where the outer shell 3 includes an outer shell upper end 31 and an outer shell lower end 32, both the outer shell upper end 31 and the outer shell lower end 32 are processed with threads, the sealing head 1 is in threaded connection with the upper end of the sealing seat 2, the lower end of the sealing seat 2 is in threaded connection with the outer shell upper end 31, the outer shell lower end 32 is in threaded connection with the base 4, a first rubber ring 22 is disposed at the connection between the sealing head 1 and the sealing seat 2, a first groove 21 for placing the first rubber ring 22 is disposed at the upper end of the sealing seat 2, the first groove 21 is conical in shape, a sealing gasket 312 is disposed at the connection between the outer shell upper end 31 and the sealing seat 2, a second groove 311 for placing the sealing gasket 312 is disposed at the connection between the outer shell lower end 32 and the outer shell lower end is disposed in a stepped shape, and the sealing gasket 321 is disposed at the connection between the outer shell lower end of the outer shell 32, and the outer shell is disposed in the stepped rubber ring 321.
This dynamic liquid level height sensor still includes wire 5, circuit board 6, bubble probe 7, temperature probe 8 and foil gage 9, circuit board 6, bubble probe 7 and temperature probe 8 all are located shell body 3, sealed head 1 is passed in proper order to the one end of wire 5, the centre bore and the circuit board 6 of first rubber ring 22 and seal receptacle 2 are connected, first rubber ring 22 is compressed tightly at the junction of sealed head 1 and seal receptacle 2, thereby make first rubber ring 22 hug closely wire 5 and seal up wire 5, a terminal equipment 101 is connected to the other end of wire 5.
The bubble probe 7 is used for obtaining the average density of the fluid, the strain gauge 9 is used for measuring the pressure of the fluid, the temperature probe 8 is used for measuring the temperature, and the temperature measured by the temperature probe 8 is used for correcting the pressure measured by the strain gauge 9, so that the temperature drift of the strain gauge 9 is eliminated.
The inner part of the outer shell 3 is connected with a clamping seat 33, the clamping seat 33 is in threaded connection with the inner part of the outer shell 3, a first threaded blind hole 331 is processed on the clamping seat 33, a first through hole 61 is arranged on the circuit board 6, and the circuit board 6 can be fixed on the clamping seat 33 by inserting bolts into the first through hole 61 and the first threaded blind hole 331.
Referring to fig. 5, an end surface of the clamping seat 33 is processed with an inner hexagonal groove 332 to facilitate screwing and unscrewing with an inner hexagonal wrench.
A gland 352 of fixed connection on the outer casing 3, outer casing 3 is equipped with second rubber ring 351 with gland 352's junction, be equipped with the third recess 35 that is used for placing second rubber ring 351 on outer casing 3, still process second screw thread blind hole 34 and second through-hole 36 on the outer casing 3, bubble probe 7 passes gland 352 in proper order, be connected with circuit board 6 behind second rubber ring 351's the centre bore and the second through-hole 36, be equipped with third through-hole 3521 on the gland 352, can be with gland 352 fixed connection on outer casing 3 through insert the screw in third through-hole 3521 and second screw thread blind hole 34, thereby gland 352 compresses tightly second rubber ring 351 realizes the sealed to bubble probe 7 simultaneously.
A protection cover 353 is further fixedly connected to the outer shell 3, the protection cover 353 is located above the pressing cover 352, a fourth through hole 3531 is formed in the protection cover 353, the protection cover 353 can be fixedly connected to the outer shell 3 through inserting screws into the fourth through hole 3531 and the second threaded blind hole 34, and the protection cover 353 is used for protecting the bubble probe 7.
Referring to fig. 4, a third threaded blind hole 62 is formed on the circuit board 6, and the temperature probe 8 is screwed into the third threaded blind hole 62 by means of a threaded connection, so as to connect the temperature probe 8 with the circuit board 6.
A fourth groove 41 is processed in the base 4, a strain gauge 9 with a waterproof function is placed in the fourth groove 41, the strain gauge 9 is connected with the circuit board 6, a pressing ring 333 is arranged above the strain gauge 9, and the pressing ring 333 is located at the connection position of the clamping seat 33 and the inner part of the outer shell 3 and used for sealing the strain gauge 9.
The circuit board 6 is connected with a data processing circuit 63, and the data processing circuit 63 is used for processing data detected by the strain gauge 9, the bubble probe 7 and the temperature probe 8.
The working principle of the working liquid level sensor is as follows: the strain gauge 9 is deformed under the influence of the pressure of gas-liquid two-phase flow in the shaft annulus, the deformation is larger when the pressure is larger, and a linear relation exists between the pressure value and the deformation, the pressure value of the fluid can be obtained by calibrating the deformation of the strain gauge 9, meanwhile, the temperature drift is easy to generate because the strain gauge 9 is sensitive to the temperature, the temperature is measured in real time by using the temperature probe 8, the temperature drift of the strain gauge 9 is corrected according to the measurement result of the temperature, the data measured by the strain gauge 9 and the temperature probe 8 are transmitted to the data processing circuit 63, and the data processing circuit 63 can process the data; because the coal bed gas well cylinder annular fluid is gas-liquid two-phase flow, if a common density sensor is adopted for measurement, the measurement result is liquid density, the average density of the mixed liquid and gas cannot be obtained, the gas-liquid two-phase flow is divided into different flow patterns according to different gas contents, the corresponding relation exists between the flow patterns of the fluid and the fluid density, the parameter data of the fluid can be detected in real time by using the bubble probe 7, the parameter data are transmitted to the data processing circuit 63, the data processing circuit 63 judges the flow patterns of the fluid through operation, and the average density of the mixed liquid and gas is obtained according to the judgment result of the flow patterns.
The embodiment of the invention also provides a use method of the working fluid level sensor, which comprises the following steps: the method comprises the following steps:
s101, installing a working fluid level sensor on an oil pipe, then placing the oil pipe provided with the working fluid level sensor below a working fluid level in a well, and obtaining a first height h 1 First height h 1 The depth of the installation position of the dynamic liquid level sensor from the well head is obtained, and the pressure P of the air at the well head is obtained 0 。
S102, setting the first height h 1 And pressure P of well head air 0 Input to the terminal device 101;
s103, starting the working fluid level sensor, and measuring by using the strain gauge 9 to obtain the fluid pressure P at the mounting position of the working fluid level sensor 1 The average density ρ and the fluid pressure P of the fluid between the mounting position of the working fluid level sensor and the working fluid level are obtained by the bubble probe 7 1 And the average density ρ are transmitted to the terminal device 101;
s104, the terminal device 101 receives the fluid pressure P 1 Processing with the average density rho to obtain the working fluid level height h 3 ；
Working fluid level height h 3 The preparation method specifically comprises the following steps:
4.1 calculating the pressure P of the liquid at the mounting position of the dynamic liquid level sensor 2 The liquid is mounted on the working liquid level sensorPressure P generated by position 2 The calculation formula of (c) is:
P 2 ＝P 1 -P 0 ；
4.2 calculating the second height h 2 Second height h 2 The depth of the working fluid level from the mounting position of the working fluid level height sensor and the second height h 2 The calculation formula of (c) is:
h 2 ＝P 2 /ρg
where ρ is an average density obtained with the bubble probe 7 and g is a gravity constant;
4.3 calculating the working fluid level h 3 Height h of working fluid level 3 The calculation formula of (2) is as follows:
h 3 ＝h 1 -h 2 。
the dynamic liquid level height sensor provided by the invention has a simple structure and is convenient to install, the first rubber ring 22 is arranged at the joint of the sealing head 1 and the sealing seat 2, the sealing gasket 312 is arranged at the joint of the upper end 31 of the outer shell and the sealing seat 2, and the rubber sealing ring 321 is arranged at the joint of the lower end 32 of the outer shell and the base 4, so that the sealing property of the dynamic liquid level height sensor is effectively ensured, and the potential safety hazard is reduced; according to the invention, the lead 5 is sealed by adopting the first rubber ring 22, the bubble probe 7 is sealed by adopting the second rubber ring 351, the bubble probe 7 is protected by adopting the protective cover 353, and the strain gauge 9 is sealed by adopting the pressing ring 333, so that the working fluid level sensor is prevented from being influenced by fluid flow; according to the invention, the temperature drift of the strain gauge 9 can be effectively eliminated by correcting the pressure measured by the strain gauge 9 through the temperature probe 8, the average density of the fluid is obtained by using the bubble probe 7, the error caused by the influence of the annular bubble section of the well casing is reduced, the problem of larger error of the height of the working fluid level of the bubble-containing section measured by the existing measuring method is effectively solved, and the measuring precision of the height of the working fluid level is improved; the using method provided by the invention has simple steps and is convenient to calculate, and the height of the working fluid level can be measured in real time.
In this document, the terms front, back, upper, lower and the like in the drawings are used for the sake of clarity and convenience only for the components are located in the drawings and the positions of the components relative to each other. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The embodiments and features of the embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The working fluid level sensor is characterized by comprising a sealing head, a sealing seat, an outer shell and a base which are connected in sequence, the working fluid level sensor further comprises a lead, a circuit board, a bubble probe, a temperature probe and a strain gauge, the circuit board, the bubble probe and the temperature probe are all located in the outer shell, the strain gauge is located in the base, the lead, the bubble probe, the temperature probe and the strain gauge are connected with the circuit board respectively, the bubble probe is used for obtaining the average density of fluid, the strain gauge is used for measuring the pressure of the fluid, the temperature probe is used for measuring the temperature, and the temperature measured by the temperature probe is used for correcting the pressure measured by the strain gauge so as to eliminate temperature drift of the strain gauge.
2. A working fluid level sensor suitable for two-phase gas-liquid flow according to claim 1, wherein the outer casing comprises an upper end and a lower end, the sealing head is in threaded connection with the upper end of the sealing seat, the lower end of the sealing seat is in threaded connection with the upper end of the outer casing, the lower end of the outer casing is in threaded connection with the base, a first rubber ring is arranged at the joint of the sealing head and the sealing seat, a first groove for placing the first rubber ring is arranged at the upper end of the sealing seat, a sealing gasket is arranged at the joint of the upper end of the outer casing and the sealing seat, a second groove for placing the sealing gasket is arranged at the upper end of the outer casing, a rubber sealing ring is arranged at the joint of the lower end of the outer casing and the base, the lower end of the outer casing is stepped, and the rubber sealing ring is placed at the step of the lower end of the outer casing.
3. A working fluid level sensor suitable for two-phase gas-liquid flow according to claim 2, wherein one end of the wire is connected to the circuit board through the central holes of the seal head, the first rubber ring and the seal seat in sequence, the first rubber ring is compressed at the joint of the seal head and the seal seat, so that the first rubber ring is tightly attached to the wire to seal the wire, and the other end of the wire is connected to the terminal device.
4. A dynamic liquid level sensor suitable for two-phase gas-liquid flow as claimed in claim 1, wherein a clamping seat is connected to the inside of the outer shell, the clamping seat is in threaded connection with the inside of the outer shell, a first threaded blind hole is formed in the clamping seat, a first through hole is formed in the circuit board, the circuit board can be fixed on the clamping seat by inserting bolts into the first through hole and the first threaded blind hole, and an inner hexagonal groove is formed in the end face of the clamping seat to facilitate screwing and unscrewing with an inner hexagonal wrench.
5. A dynamic liquid level sensor suitable for two-phase gas-liquid flow as claimed in claim 1 wherein the outer shell is connected with a gland, the joint of the outer shell and the gland is provided with a second rubber ring, the outer shell is provided with a third groove for placing the second rubber ring, the outer shell is provided with a second threaded blind hole and a second through hole, the bubble probe sequentially passes through the gland, the central hole of the second rubber ring and the second through hole and then is connected with the circuit board, the gland is provided with a third through hole, the gland can be fixedly connected to the outer shell by inserting screws into the third through hole and the second threaded blind hole, and the gland compresses the second rubber ring to seal the bubble probe.
6. The two-phase flow liquid level sensor according to claim 5, wherein a protective cap is further attached to the outer shell, the protective cap is located above the gland, the protective cap has a fourth through hole, the protective cap is fixedly attached to the outer shell by inserting a screw into the fourth through hole and the second threaded blind hole, and the protective cap protects the bubble probe.
7. The working fluid level sensor suitable for two-phase gas-liquid flow according to claim 1, wherein a fourth groove is formed in the base, a strain gauge with a waterproof function is placed in the fourth groove, a pressing ring is arranged above the strain gauge and located at a joint of the clamping seat and the inner portion of the outer shell, and the pressing ring is used for sealing the strain gauge.
8. A working fluid level sensor suitable for two-phase gas-liquid flow according to claim 1, wherein the circuit board is provided with a third threaded blind hole, the temperature probe is screwed into the third threaded blind hole through threaded connection so as to connect the temperature probe with the circuit board, and the circuit board is connected with a data processing circuit for processing data detected by the strain gauge, the bubble probe and the temperature probe.
9. Use of a mobile liquid level sensor adapted for gas-liquid two-phase flow according to any of claims 1 to 8, characterized in that it comprises the following steps:
installing the working fluid level sensor on an oil pipe, then placing the oil pipe provided with the working fluid level sensor below the working fluid level in the well to obtain a first height, wherein the first height is the depth from the installation position of the working fluid level sensor to the well head, and meanwhile, the pressure of the air at the well head is obtained;
inputting the first elevation and a pressure of wellhead air to a terminal device;
starting a dynamic liquid level sensor, measuring by using the strain gauge to obtain fluid pressure at the installation position of the dynamic liquid level sensor, obtaining the average density of fluid between the installation position of the dynamic liquid level sensor and the dynamic liquid level by using the bubble probe, and transmitting the fluid pressure and the average density to terminal equipment;
and the terminal equipment processes the received fluid pressure and the average density to obtain the working fluid level height.
10. Use of a meniscus level sensor suitable for two-phase gas-liquid flow according to claim 9, characterized in that the meniscus level is obtained by:
calculating the pressure generated by the liquid at the mounting position of the working fluid level sensor, wherein the calculation formula of the pressure generated by the liquid at the mounting position of the working fluid level sensor is as follows:
P 2 ＝P 1 -P 0
in the formula, P 2 For the pressure of the liquid at the location of the mounting of the dynamic liquid level sensor, P 1 For measuring the fluid pressure at the mounting position of the dynamic liquid level sensor by means of strain gauges, P 0 The pressure of the wellhead air;
calculating a second height, wherein the second height is the depth of the working fluid level from the mounting position of the working fluid level height sensor, and the calculation formula of the second height is as follows:
h 2 ＝P 2 /ρg
in the formula, h 2 At a second height, ρ is the average density obtained with the bubble probe, g is the gravity constant;
calculating the height of the working fluid level, wherein the calculation formula of the height of the working fluid level is as follows:
h 3 ＝h 1 -h 2
in the formula, h 3 Is the working fluid level, h 1 Is a first height.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202064933U (en) * | 2011-06-01 | 2011-12-07 | 中国石油天然气股份有限公司 | Multi-parameter monitoring device for oil well |
| CN202250044U (en) * | 2011-08-26 | 2012-05-30 | 廖正佳 | Automatic collecting instrument for dynamic liquid level of oil well |
| CN102877832A (en) * | 2012-09-14 | 2013-01-16 | 中国石油天然气股份有限公司 | Method and system for measuring movable liquid surface of oil well |
| CN103132989A (en) * | 2013-02-01 | 2013-06-05 | 中联煤层气国家工程研究中心有限责任公司 | Method and system for calculating coal-bed gas well working fluid level |
| CN104389586A (en) * | 2014-10-20 | 2015-03-04 | 重庆科技学院 | Oil well working fluid level measuring device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140130591A1 (en) * | 2011-06-13 | 2014-05-15 | Schlumberger Technology Corporation | Methods and Apparatus for Determining Downhole Parameters |
-
2017
- 2017-05-11 CN CN201710328194.1A patent/CN106979005B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202064933U (en) * | 2011-06-01 | 2011-12-07 | 中国石油天然气股份有限公司 | Multi-parameter monitoring device for oil well |
| CN202250044U (en) * | 2011-08-26 | 2012-05-30 | 廖正佳 | Automatic collecting instrument for dynamic liquid level of oil well |
| CN102877832A (en) * | 2012-09-14 | 2013-01-16 | 中国石油天然气股份有限公司 | Method and system for measuring movable liquid surface of oil well |
| CN103132989A (en) * | 2013-02-01 | 2013-06-05 | 中联煤层气国家工程研究中心有限责任公司 | Method and system for calculating coal-bed gas well working fluid level |
| CN104389586A (en) * | 2014-10-20 | 2015-03-04 | 重庆科技学院 | Oil well working fluid level measuring device and method |
Non-Patent Citations (1)
| Title |
|---|
| 吴川.煤层气合层排采井下工况参数实时探测技术研究.《中国博士学位论文全文数据库工程科技I辑》.2017,(第undefined期),B019-9. * |
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