CN112780270A - Underground sampling test device and test method - Google Patents
Underground sampling test device and test method Download PDFInfo
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- CN112780270A CN112780270A CN202011463906.9A CN202011463906A CN112780270A CN 112780270 A CN112780270 A CN 112780270A CN 202011463906 A CN202011463906 A CN 202011463906A CN 112780270 A CN112780270 A CN 112780270A
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- 238000005070 sampling Methods 0.000 title claims abstract description 156
- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 238000001514 detection method Methods 0.000 claims abstract description 88
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 8
- 239000008398 formation water Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000004210 cathodic protection Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/081—Obtaining fluid samples or testing fluids, in boreholes or wells with down-hole means for trapping a fluid sample
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/088—Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling
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Abstract
The invention relates to the technical field of underground sampling test, in particular to an underground sampling test device and a test method, wherein the whole conductive unit and a connected sampling device are put down into a well, when a detection device on the ground detects that the resistance value is obviously reduced, a detection electrode in the sampling device is contacted with the underground liquid level, the distance between the detection electrode and the conductive unit to a well head is the depth of the underground liquid level, then when the weight of the whole underground sampling test device detected by the detection device on the ground is suddenly reduced and stabilized at a certain value, the distance between a balancing weight and the conductive unit to the well head is the depth of the well, then the whole underground sampling test device is lifted to the ground, then the sampling device is taken down to detect the underground liquid, the sampling of the underground liquid is realized through the device, the detection of the underground liquid level depth and the detection of the well depth can be simultaneously carried out, the data can provide basis for the development and construction of new wells in the area, so that the construction cost is saved.
Description
Technical Field
The invention relates to the technical field of underground sampling test, in particular to an underground sampling test device and a test method.
Background
The cathodic protection system for cluster well group in oil field development is an effective means for solving corrosion of external of casing. 7000 oil field cathodic protection oil-water wells have, get good protective effect, 10 years ago, the casing damage rate of the oil-water well that implements cathodic protection was only 1/7 that does not implement the oil-water well.
The anode well in the cluster well group cathode protection system is a key link of the whole system, and the change of the stratum water level is inevitably caused by the change of climate and industrial water. Once the water level of the stratum is lower than the depth of the anode well, the resistance of the system is increased, and the protection effect is influenced. Therefore, the anode well needs to be tested on site, no special anode well sampling test device exists at present, and the formation water level and the water quality components of the anode well cannot be visually tested. Existing downhole sampling test devices such as application No. 200620123886.X (a downhole sampler), application No. 201120187307.9 (injector downhole sampler), application No. 201520217987.2 (downhole sampling test device), application No. 201820543502.2 (hydraulic downhole sampler) can only collect downhole liquid samples and cannot determine liquid level depth.
In order to solve the pure problems in the prior art, the invention provides the underground sampling test device and the test method which can not only collect underground liquid samples, but also determine the liquid level depth.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the underground sampling test device and the test method, particularly has the characteristics of measuring the well depth, the underground liquid level depth and the bottom water level elevation of the area where the well is positioned, and provides construction basis for the construction of a new well in the area at the later stage.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the utility model provides a sample testing arrangement in pit, includes electrically conductive unit, and sampling device is connected to electrically conductive unit one end, be provided with detection electrode in the sampling device, the last inlet that still is provided with of sampling device, sampling device's bottom still is connected with the balancing weight, detection device is connected to the electrically conductive unit other end.
Further, sampling device including advancing the liquid bucket and sampling bucket, advance the opening of liquid bucket down, the bottom and the electrically conductive unit connection of entering the liquid bucket, the opening of sampling bucket up, the opening part of advancing the liquid bucket and the opening part sealing connection of sampling bucket, detection electrode sets up in the bottom of advancing the liquid bucket, and detection electrode's one end and the bottom fixed connection of feed liquor bucket, the bottom and the electrically conductive unit electrically conductive connection that pass into the liquid bucket simultaneously are provided with a plurality of inlet on the lateral wall of advancing the liquid bucket.
Further, the opening part of the liquid inlet barrel and the opening part of the sampling barrel are provided with connecting screw threads, and the opening part of the liquid inlet barrel and the opening part of the sampling barrel are in threaded sealing connection through the connecting screw threads.
Furthermore, an adapter is also arranged between the conductive unit and the sampling device, one end of the adapter is fixedly connected with the conductive unit, and the other end of the adapter is in threaded connection with the sampling device.
Furthermore, the conducting unit is a cable, and length scales are arranged on the cable along the length direction.
Furthermore, the cable is a steel wire cable, and the bearing capacity is more than or equal to 0.5 Kg/m.
Furthermore, the bottom of the sampling device is provided with a conversion head, one end of the conversion head is fixedly connected with the bottom of the sampling device, the other end of the conversion head is provided with a counterweight connecting screw thread, the counterweight block is connected with the other end of the conversion head through the counterweight connecting screw thread, and a plurality of counterweight blocks are arranged and increase or decrease counterweights according to requirements of well depth and a ground detection device.
A testing method of a downhole sampling testing device comprises any one of the downhole sampling testing devices, and comprises the following steps
S1: detecting whether connection of underground sampling testing device is intact
Connecting the conductive unit with the sampling device and the connection detection device, then placing the sampling device in saline, observing whether the connection detection device has a resistor or not, and if the resistor has the resistor value, connecting the sampling device and the connection detection device well;
s2: sampling and testing device under the well to the well
Installing a ground lowering device, lowering the underground sampling test device to the underground, and modulating the detection device;
s3: detecting liquid level depth
Observing the resistance value detected by the detection device in the process of putting the underground sampling test device down to the underground, when the resistance value is obviously reduced, contacting a detection electrode in the sampling device with the underground liquid level, repeatedly detecting and determining the position of the liquid level, wherein the length of the conductive unit and the length from the end part of the conductive unit to the position of the detection electrode are the height of the underground liquid level;
s4: detecting the depth of a well
And (4) continuously lowering the underground sampling testing device on the basis of S3, and if the weight value detected by the detection device suddenly drops to a certain value and is not changed, and the number of the balancing weights is n, the length of the conductive unit, the length of the sampling device and the length of the balancing weight (n-1) are the depth of the well at the moment.
Further, a testing method of the downhole sampling testing device is applied to detection and determination of the stratum water level altitude of the area where the well is located, and the detection and determination method comprises the following steps:
the elevation of the liquid level of the formation water in the area where the well is located is H, the elevation of the ground is A, the height of the liquid level under the well detected in S3 is H, and the well deviation value of the well is obtained to be alpha;
wherein H is a-hxcos α.
The invention has the beneficial effects that:
compared with the prior art, one end of the conductive unit is connected with the sampling device, the other end of the conductive unit is connected with the detection device, the detection device is positioned on the ground, when the whole conductive unit and the connected sampling device are lowered into the well through the lowering device on the ground, when the detection device on the ground detects that the resistance value is obviously lowered, the detection electrode in the sampling device is contacted with the underground liquid level, the distance from the detection electrode and the conductive unit to the wellhead is the depth of the underground liquid level, the detection electrode and the conductive unit can be lifted and lowered for multiple times for obtaining the average value for the accuracy of the depth, the depth of the underground liquid level is determined, then when the weight of the whole underground sampling test device detected by the detection device on the ground is suddenly lowered and stabilized at a certain value, the distance from the balancing weight and the conductive unit to the wellhead is the depth of the well, when the underground liquid taking detection is needed, at, the underground liquid enters the sampling device through the liquid inlet on the sampling device, then the whole underground sampling testing device is lifted to the ground, then the sampling device is taken down to detect the underground liquid, the underground liquid sampling is realized through the underground liquid sampling testing device, meanwhile, the underground liquid level depth can be detected, the well depth is detected, the basis can be provided for the development and construction of a new well in the area through the determination of the data, and therefore the construction cost is saved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the overall structure of the sampling test device of the present invention in a well.
FIG. 2 is a schematic view of the overall structure of the sampling testing device of the present invention.
In the figure: 1-gas guide tube, 2-cable, 3-conversion joint, 4-detection electrode, 5-liquid inlet, 6-connection screw thread, 7-sampling barrel, 8-balancing weight, 9-liquid inlet barrel, 10-conversion head and 11-balancing weight connection screw thread.
Detailed Description
It should be noted that, in the embodiments of the present invention, the terms referred to are:
and the conductive unit is used for transmitting the resistance value detected by the detection electrode in the underground sampling and testing device to the ground and detecting the resistance value by the detection device.
The sampling device is used for sampling underground liquid and can realize liquid level depth detection.
And the detection electrode is used for detecting the depth of the liquid level.
The balancing weight is used for increasing the balance weight of the whole sampling and testing device, so that the whole sampling and testing device can be smoothly placed underground, and meanwhile, the depth of the well can be determined by detecting the weight of the whole sampling and testing device and the balance weight through the detection device.
And the detection device is used for detecting the resistance value of the detection electrode in the sampling device after encountering the underground liquid and detecting the weight of the whole sampling test device and the counterweight.
The present invention provides a downhole sampling testing apparatus and a testing method thereof, which can be applied to various downhole sampling devices.
Example 1:
referring to fig. 1, the underground sampling and testing device comprises a conductive unit, wherein one end of the conductive unit is connected with a sampling device, a detection electrode 4 is arranged in the sampling device, a liquid inlet 5 is also arranged on the sampling device, the bottom of the sampling device is also connected with a balancing weight 8, and the other end of the conductive unit is connected with a detection device.
In the above embodiment, one end of the conductive unit is connected with the sampling device, the other end of the conductive unit is connected with the detection device, the detection device is located on the ground, when the entire conductive unit and the connected sampling device are lowered into the well through the lowering device on the ground, when the detection device on the ground detects that the resistance value is obviously lowered, the detection electrode 4 in the sampling device is contacted with the underground liquid level, the distance from the detection electrode 4 and the conductive unit to the wellhead is the depth of the underground liquid level, the detection device on the ground can lift and lower for multiple times to obtain an average value for the accuracy of the depth, the depth of the underground liquid level is determined, then when the weight of the entire underground sampling test device detected by the detection device on the ground is suddenly lowered and stabilized at a certain value, the distance from the counterweight 8 and the conductive unit to the wellhead is the depth of the well, when the underground liquid taking detection is required, liquid in the pit gets into in the sampling device through inlet 5 on the sampling device, then lifts whole sample testing arrangement in the pit to ground and then takes off sampling device and carry out the detection of liquid in the pit, has realized the sample of liquid in the pit through the device, can carry out the detection of liquid level degree in the pit simultaneously, and the detection of this well depth, can provide the basis for the development and construction of this regional new well through the determination of these data to save construction cost.
Example 2:
referring to fig. 1 and 2, sampling device including advancing liquid bucket 9 and sampling bucket 7, advance the opening of liquid bucket 9 down, the bottom and the electrically conductive unit connection of liquid bucket 9, sampling bucket 7's opening up, the opening part of liquid bucket 9 and the opening part sealing connection of sampling bucket 7, detecting electrode 4 sets up in the bottom of liquid bucket 9, and detecting electrode 4's one end and the bottom fixed connection of liquid bucket 9, passes the bottom and the electrically conductive unit electrically conductive connection of liquid bucket 9 simultaneously, is provided with a plurality of inlet 5 on the lateral wall of liquid bucket 9.
Further, the opening part of feed liquor bucket 9 and the opening part of sampling bucket 7 all be provided with connecting screw thread 6, the opening part of feed liquor bucket 9 and the opening part of sampling bucket 7 pass through connecting screw thread 6 thread sealing connection.
In the above embodiment, the sampling device is composed of a liquid inlet barrel 9 and a sampling barrel 7, when liquid is taken out from the liquid inlet barrel 9 into the sampling barrel 7, the conductive unit is lifted to the liquid inlet barrel 9 and the sampling barrel 7 are positioned on the ground, then the sampling barrel 7 is screwed by the connecting screw thread 6 to be directly taken down, the taken liquid is detected, and the sampling is convenient, wherein the connected balancing weight 8 needs to be taken down in advance, the detection electrode 4 is arranged at the bottom of the liquid inlet barrel 9 and is provided with a plurality of liquid inlets 5 to prevent impurities in a shaft from polluting the closed electrode and causing a test error, one end of the detection electrode 4 is fixedly connected with the bottom of the liquid inlet barrel 9 and penetrates through the bottom of the liquid inlet barrel 9 to be electrically connected with the conductive unit, the detection device can be communicated with and detect the resistance value of the detection electrode 4, the opening of the liquid inlet barrel 9 is in threaded sealing connection with the opening of the sampling barrel 7 through the connecting screw thread 6, avoid in the impurity entering sampling device in the pit.
Example 3:
referring to fig. 2, an adapter 3 is further disposed between the conductive unit and the sampling device, one end of the adapter 3 is fixedly connected to the conductive unit, and the other end of the adapter 3 is in threaded connection with the sampling device.
Adopt crossover sub 3 to connect sampling device and electrically conductive unit in the above-mentioned embodiment, can set up the screw thread on crossover sub 3 and connect sampling device, the other end is through electrically conductive fixed connection electrically conductive unit, conveniently changes detection electrode 4.
Example 4:
the conducting unit is a cable 2, and length scales are arranged on the cable 2 along the length direction.
The cable 2 is a steel wire cable with a bearing capacity of more than or equal to 0.5 Kg/m.
Above-mentioned embodiment conductive element adopts the cable can directly communicate detecting electrode 4 and detection device, be convenient for detect, cable 2 is the steel wire cable, the bearing capacity is more than or equal to 0.5Kg/m, or the bearing capacity of steel wire cable is about 0.5Kg/m and all is applicable to this sample testing arrangement's in the pit normal use, guarantee that cable 2 has certain bearing capacity, wherein cable 2 is provided with the length scale along length direction, can directly observe the scale and obtain the liquid level degree of depth and the degree of depth of well that detect, wherein the scale can be accurate to centimetre, guarantee the accuracy of data.
Example 5:
furthermore, the detection device is a multimeter and a weight detector.
Above-mentioned embodiment can be when the liquid level degree of depth is detected to needs when the one end that the conductive element is located ground connects the universal meter, confirms the liquid level degree of depth through detecting resistance value, can change the weight detector and connect the one end that the conductive element is located ground when needs detect the well depth and detect the degree of depth that the weight value judges the well, can audio-visually observe required numerical value through this detection device, judges the degree of depth of liquid level degree of depth or well.
Example 6:
further, referring to fig. 2, a conversion head 10 is arranged at the bottom of the sampling device, one end of the conversion head 10 is fixedly connected with the bottom of the sampling device, a counterweight connecting screw thread 11 is arranged at the other end of the conversion head 10, a plurality of counterweight blocks 8 are connected with the other end of the conversion head 10 through the counterweight connecting screw thread 11, and the counterweight is increased or decreased according to the requirements of the well depth and the ground detection device.
In the above-mentioned embodiment, the conversion head 10 is connected the balancing weight 8 through the counter weight connecting screw thread 11, conveniently changes installation balancing weight 8, guarantees that the balancing weight 8 can not drop, and the balancing weight 8 is provided with a plurality ofly, increases or reduces the counter weight according to well depth and ground detection device's requirement, and wherein the counter weight standard of balancing weight 8 does, and every increase 100m of well depth, the counter weight increases 10Kg, guarantees sample testing arrangement's normal work in the pit.
Example 7:
a method of testing a downhole sampling tool comprising a downhole sampling tool as described in any of embodiments 1-6 above, comprising the steps of
S1: detecting whether connection of underground sampling testing device is intact
Connecting the conductive unit with the sampling device and the connection detection device, then placing the sampling device in saline, observing whether the connection detection device has a resistor or not, and if the resistor has the resistor value, connecting the sampling device and the connection detection device well;
s2: sampling and testing device under the well to the well
Installing a ground lowering device, lowering the underground sampling test device to the underground, and modulating the detection device;
s3: detecting liquid level depth
Observing the resistance value detected by the detection device in the process of putting the underground sampling test device down to the underground, when the resistance value is obviously reduced, contacting the detection electrode 4 in the sampling device with the underground liquid level, repeatedly detecting and determining the position of the liquid level, wherein the length of the conductive unit and the length from the end part of the conductive unit to the position of the detection electrode 4 are the height of the underground liquid level;
s4: detecting the depth of a well
And (4) continuously lowering the downhole sampling testing device on the basis of S3, and if the weight value detected by the detection device suddenly drops to a certain value and is not changed, and the number of the balancing weights 8 is n, the length of the conductive unit, the length of the sampling device and the length of the balancing weight 8(n-1) are the depth of the well at the moment.
Further, a testing method of the downhole sampling testing device is applied to detection and determination of the stratum water level elevation of the area where the well is located, and the detection and determination method comprises the following steps:
the elevation of the liquid level of the formation water in the area where the well is located is H, the elevation of the ground is A, the height of the liquid level under the well detected in S3 is H, and the well deviation value of the well is obtained to be alpha;
wherein H is a-hxcos α.
In a further practical use of the device,
1. firstly, transporting the underground testing and sampling device to the site, and performing HSE work;
2. then carrying out underground test sampling
Connecting an underground testing and sampling device, firstly connecting a cable 2, an adapter 3 and a detection electrode 4, placing the detection electrode 4 in salt water, observing whether the equipment is well connected or not through a universal meter, and if the resistance value changes, carrying out the next step;
3. then connecting a liquid inlet barrel 9 and a sampling barrel 7, wherein the depth of the test well is about 270m, and a 30Kg counterweight is selected;
4. installing a ground lowering device, connecting a detection device, namely a universal meter, modulating a test resistance mode by the universal meter, and directly connecting a weight detector to one end of the universal meter;
the sample device for the underground test is started to be lowered, wherein the weight of the weight detector is started to display 42Kg, and the multimeter is used for displaying infinity;
lowering the underground testing sampling device, wherein the lowering speed is 10m/min within 200m, and then is reduced to 2 m/min;
5. and (3) continuing to put down the underground sampling device, obviously reducing the resistance value of the universal meter, wherein the resistance value is 0.8 omega, indicating that the underground sampling testing device reaches the surface of the formation water liquid, and lifting up the underground sampling testing device to enable the resistance of the universal meter to be infinite, namely, the resistance is above the liquid surface. Repeatedly testing to determine the position of the liquid level, controlling the lowering speed within 1m/min, and displaying the scale on the cable to 240m at the moment, namely, the depth of the liquid level is h-240 m;
6. continuing to lower the underground testing sampling device, controlling the lowering speed within 1m/min, suddenly reducing the pressure from 175Kg to 132Kg when the ground gravity detector displays that the scale on the cable displays 260m, namely the well depth is 260 m;
7. and calculating the elevation H of the formation water level of the local area according to the data, acquiring a ground elevation value A of 1200m, acquiring a depth H of the underground water level of 240m, acquiring a well deviation alpha of the well of 2 degrees, and substituting the formula H of A-H multiplied by cos alpha of 960.15 m.
The well depth of the well and the depth of the underground liquid level can be obtained through the underground sampling device and the detection method, the elevation of the stratum water liquid level of the area where the well is located can be obtained through the depth of the underground liquid level, and the depth required by the construction of a new well to be developed can be calculated through the elevation data of the stratum water liquid level of the area and the depth of the well, so that the construction cost of the new well to be developed is saved.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. The utility model provides a sample testing arrangement in pit which characterized by: the device comprises a conductive unit, wherein one end of the conductive unit is connected with a sampling device, a detection electrode (4) is arranged in the sampling device, a liquid inlet (5) is also arranged on the sampling device, the bottom of the sampling device is also connected with a balancing weight (8), and the other end of the conductive unit is connected with a detection device.
2. A downhole sampling testing device according to claim 1, wherein: sampling device including advancing liquid bucket (9) and sampling bucket (7), the opening of liquid bucket (9) is down, the bottom and the electrically conductive unit connection of advancing liquid bucket (9), the opening of sampling bucket (7) up, the opening part and the opening part sealing connection of sampling bucket (7) of advancing liquid bucket (9), detecting electrode (4) set up in the bottom of advancing liquid bucket (9), and the one end of detecting electrode (4) and the bottom fixed connection of advancing liquid bucket (9), pass the bottom and the electrically conductive unit electrically conductive connection of advancing liquid bucket (9) simultaneously, be provided with a plurality of inlet (5) on the lateral wall of advancing liquid bucket (9).
3. A downhole sampling testing device according to claim 2, wherein: the opening part of feed liquor bucket (9) and the opening part of sampling bucket (7) all be provided with connection screw thread (6), the opening part of feed liquor bucket (9) and the opening part of sampling bucket (7) pass through connection screw thread (6) thread sealing connection.
4. A downhole sampling testing device according to claim 1 or 2, wherein: still be provided with adapter (3) between electrically conductive unit and the sampling device, adapter (3) one end and electrically conductive unit fixed connection, threaded connection between adapter (3) the other end and the sampling device.
5. A downhole sampling testing device according to claim 1, wherein: the conducting unit is a cable (2), and length scales are arranged on the cable (2) along the length direction.
6. A downhole sampling testing device according to claim 5, wherein: the cable (2) is a steel wire cable, and the bearing capacity is more than or equal to 0.5 Kg/m.
7. A downhole sampling testing device according to claim 1, wherein: the detection device is a multimeter and a weight detector.
8. A downhole sampling testing device according to claim 1, wherein: the bottom of sampling device be provided with conversion head (10), conversion head (10) one end and sampling device's bottom fixed connection, conversion head (10) other end is provided with counter weight and connects screw thread (11), balancing weight (8) connect screw thread (11) and be connected with the conversion head (10) other end through the counter weight, balancing weight (8) be provided with a plurality ofly, increase or reduce the counter weight according to well depth and ground detection device's requirement.
9. A method of testing a downhole sampling and testing device comprising a downhole sampling and testing device according to any of claims 1 to 8, the method comprising: comprises the following steps
S1: detecting whether connection of underground sampling testing device is intact
Connecting the conductive unit with the sampling device and the connection detection device, then placing the sampling device in saline, observing whether the connection detection device has a resistor or not, and if the resistor has the resistor value, connecting the sampling device and the connection detection device well;
s2: sampling and testing device under the well to the well
Installing a ground lowering device, lowering the underground sampling test device to the underground, and modulating the detection device;
s3: detecting liquid level depth
Observing the resistance value detected by the detection device in the process of putting the underground sampling test device down to the underground, when the resistance value is obviously reduced, contacting the detection electrode (4) in the sampling device with the underground liquid level, repeatedly detecting and determining the position of the liquid level, wherein the length of the conductive unit and the length from the end part of the conductive unit to the position of the detection electrode (4) are the height of the underground liquid level at the moment;
s4: detecting the depth of a well
And (4) continuously lowering the downhole sampling testing device on the basis of S3, and if the weight value detected by the detection device suddenly drops to a certain value and is not changed, and the number of the balancing weights (8) is n, the length of the conductive unit, the length of the sampling device and the length of the balancing weights (8) (n-1) are the depth of the well at the moment.
10. The method for testing the downhole sampling test device according to claim 9 is applied to the detection and determination of the formation water level elevation of the area where the well is located, and the detection and determination method comprises the following steps:
the elevation of the liquid level of the formation water in the area where the well is located is H, the elevation of the ground is A, the height of the liquid level under the well detected in S3 is H, and the well deviation value of the well is obtained to be alpha;
wherein H is a-hxcos α.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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