CN106761674B - It is a kind of integrate draw water and the ground of unrestrained water test lead directly to down-hole drilling device - Google Patents

Abstract

The invention discloses a ground through-hole drilling device integrating water pumping and water drainage testing, comprising a water pumping test device, a water drainage testing device, a hole through the ground through the well and a ground comprehensive receiving device. Downhole are sequentially arranged with reverse wire water stop casing a, taper water stopper, water filter flower tube, sand settling solid tube and reverse wire water stop casing b. The water filter flower tube is located in the aquifer, and the sand settling solid tube is arranged with a sand settling sleeve A water level and water temperature sensor is installed in the borehole; the water drainage test device includes five flanges and magnetic vortex flow sensors arranged in the underground tunnel, and a gate valve is installed between the bottom of the borehole and the water drainage test device. The invention fully considers the needs of pumping test or drainage test, one hole is used for two purposes, overcomes the disadvantage of inconvenient construction in underground wells, and realizes real-time automatic monitoring of quantitative data such as water level and water temperature of the target aquifer on the ground.

Description

A ground through-hole drilling device integrating water pumping and water drainage tests

technical field

The invention relates to a ground through-hole drilling device integrating water pumping and water drainage tests, belonging to the technical field of water pumping and water drainage tests.

Background technique

At present, the pumping test and drainage test of an aquifer are generally carried out independently. Generally, the pumping test is carried out through the ground construction drilling hole, and the water drainage test is carried out through the underground construction drilling hole. Therefore, two boreholes need to be constructed, and the construction and monitoring of the underground water drainage boreholes are limited by the roadway conditions, and it is not easy to collect data.

SUMMARY OF THE INVENTION

In view of the problems existing in the above-mentioned prior art, the present invention provides a ground through-hole drilling device integrating water pumping and water drainage tests, which can realize water pumping and water drainage tests, and can monitor the water level, water temperature, etc. of an aquifer in real time. It solves the problems of cumbersome links, complicated processes, difficult to control and cannot be used for long-distance automatic monitoring on the ground caused by the current pumping and drainage tests.

In order to achieve the above purpose, the present invention adopts a ground through-hole drilling device integrating water pumping and water drainage test, including a water pumping test device for conducting a water pumping test and a water pumping test device installed in the underground tunnel for conducting the water drainage test. The water drainage test device also includes a borehole that goes straight from the ground to the downhole and a ground comprehensive receiving device for monitoring the state of the aquifer in real time. The borehole is sequentially arranged from the ground to the downhole with a reverse wire waterstop casing a, a taper stopper The water filter, the water filter flower tube, the sand settling solid tube and the reverse silk water stop casing b, the water filter flower tube is located in the aquifer, and the sand settling solid tube is arranged with a sand settling casing; the reverse wire water stop casing a, the taper stopper The water device, the solid sand settling pipe and the reverse wire water stop casing b all pass through the cement slurry full solid pipe; a water level and water temperature sensor is installed in the borehole; the water drainage test device includes five flanges with different diameters and The drainage pipeline connecting the flanges, five flanges are arranged in the downhole roadway with different diameters step by step, namely the first flange, the second flange, the third flange, the fourth flange and the third flange. Five flanges, the drainage pipeline between the first flange and the second flange is a T-shaped pipeline, a sand mesh for filtering sand particles is installed in the T-shaped pipeline, and a sand discharge valve is installed at the bottom of the T-shaped pipeline; A magnetic vortex flow sensor for detecting the flow of the drainage water is installed on the drainage pipeline between the third flange and the fourth flange; the bottom of the borehole is connected with the drainage water test device through a drainage pipeline, and a gate valve is installed on the drainage pipeline; The water level water temperature sensor and the magnetic vortex flow sensor transmit the detected data to the ground comprehensive receiving device; through drilling, using the gate valve, the pumping test or the water drainage test can be carried out at any time, and the water level and water temperature data can be received in real time on the ground, so as to accurately Quantitatively judge the hydrogeological parameters of the monitored aquifers.

The outer side of the water filter flower tube is welded with iron wire, covered with three layers of nylon mesh, and the outer side of the nylon mesh is bundled with iron wire in sections.

The ground comprehensive receiving device includes a monitoring system main control station, a data storage backup server, and a ground telemetry system sub-station, and the ground telemetry system sub-station receives the water level, water temperature, and drainage water flow signals detected by the water level and water temperature sensor and the magnetic vortex flow sensor. It is backed up to the data storage backup server, and sent to the main control station of the monitoring system at the same time to realize the data collection, processing and query functions of the hydrogeological parameters of the aquifer.

The specific structure of the drilled hole is:

(1) The diameter of 0-124.94m is Ф270mm, and the Ф194×8mm anti-wire water stop casing a and the Ф240mm taper water stop are installed, and the pipe is fully solidified with cement slurry;

(2) 124.94-154.20m hole diameter Ф250mm, among which, 127.94-154.20m is put into Ф194×6mm water filter flower tube, 8# iron wire is welded outside the tube, and 120 mesh nylon mesh is covered with three layers, and 16# iron wire with a spacing of 0.15m is used externally. Sectional bundling; 156.00-158.00m run into Ф146×8mm sand settling solid pipe and Ф127×4mm sand settling casing, and use cement slurry to fully solidify the pipe;

(3) 158.00-225.00m hole diameter Ф113mm, run down Ф89×4.5mm reverse wire water stop casing b, and use cement slurry to fully solidify the pipe.

Compared with the prior art, the present invention constructs a ground through-hole drilling device that integrates water pumping and water drainage tests by taking advantage of the characteristics of easy construction on the ground and combining with the upper and lower comparison diagrams of the well. Layer properties are monitored in real time. Through the ground construction and the direct access to the underground hole, the water pumping test or the water drainage test can be carried out at any time by using the gate valve installed in the roadway in advance, and the water level and water temperature data can be received in real time on the ground, so as to accurately quantify and judge the monitored hydrogeological parameters of the aquifer. . The device is especially suitable for the situation that the underground roadway is not suitable for the construction of the drainage hole, and then the construction is convenient on the ground according to the position map of the upper and lower wells. Finally, while the water pumping and drainage tests are realized, the water level, water temperature and other states of an aquifer can be monitored in real time, which solves the cumbersome links, complicated processes, difficult to control and unusable problems caused by the current pumping and drainage tests. The problem of long-distance automatic monitoring on the ground. In general, the present invention has the following advantages:

(1) The ground is convenient for construction, which integrates three parts, and water pumping and drainage can be performed interactively according to needs;

(2) It can automatically collect and analyze data in real time, and the calculated data is easy to obtain and reliable;

(3) Save drilling costs, adjust the evacuation amount according to needs, and can be used for a long time.

Description of drawings

1 is a schematic diagram of an integrated device of the present invention;

Fig. 2 is the pumping test model diagram of the present invention;

FIG. 3 is a schematic diagram of the water drainage test device of the present invention.

In the picture: 1. Ground comprehensive receiving device, 2. Drilling hole, 3. Water level and water temperature sensor, 4. Upper flange, 5. Gate valve, 6. Lower flange, 7. Drainage test device, 8. Reverse wire Water stop casing a, 9, taper water stop, 10, water filter flower tube, 11, sand settling solid pipe, 12, sand settling casing, 13, reverse wire water stop casing b, 14, first flange , 15, sand release valve, 16, sand screen, 17, second flange, 18, third flange, 19, magnetic vortex flow sensor, 20, fourth flange, 21, fifth flange , 22, the outlet of the water discharge pipe, 23, the automatic flow recorder.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, a ground through-hole drilling device that integrates water pumping and water drainage tests, a water pumping test device for conducting water pumping tests, and a dredging device installed in underground tunnels for conducting water drainage tests. The water discharge test device 7, the borehole 2 which is directly connected to the well from the ground, and the ground comprehensive receiving device 1 for monitoring the state of the aquifer in real time. The borehole 2 is sequentially arranged from the ground to the downhole with a reverse wire water stop casing a8, a taper The water stopper 9, the water filter flower tube 10, the sand settling solid tube 11 and the reverse silk water stop casing b13, the water filter flower tube 10 is located in the aquifer, and the sand settling tube 11 is arranged with a sand settling sleeve 12; The water stop casing a8, the taper water stopper 9, the sand settling solid pipe 11 and the reverse wire water stop casing b13 all pass through the cement slurry full solid pipe; a water level and water temperature sensor 3 is installed in the borehole 2; the drainage water test device 7. It includes five flanges with different diameters and a water discharge pipeline connecting the flanges. The five flanges are arranged in the underground tunnel with different diameters step by step, and they are the first flange 14 and the second flange respectively. 17. The third flange 18, the fourth flange 20 and the fifth flange 21, the drain pipe between the first flange 12 and the second flange 17 is a T-shaped pipe, and the inside of the T-shaped pipe is A sand screen 15 for filtering sand is installed, and a sand discharge valve 16 is installed at the bottom of the T-shaped pipe; the water discharge pipe between the third flange 18 and the fourth flange 20 is installed with a magnetic sensor for detecting the flow of drainage water. Vortex flow sensor 19; the bottom of the borehole 2 is connected to the drainage water test device 7 through a drainage pipe, and a gate valve 5 is installed on the drainage pipe; ; Through borehole 2 and gate valve 5, the pumping test or drainage test can be carried out at any time, and the water level and water temperature data can be received in real time on the ground, so as to accurately quantify and judge the hydrogeological parameters of the monitored aquifer. Among them, the pumping test device is the necessary equipment for pumping test in addition to drilling, such as pumping pump, weir and so on.

The outer side of the water filter flower tube 10 is welded with iron wire, covered with three layers of nylon mesh, and the outer side of the nylon mesh is bundled with iron wire in sections, which can further prevent the sand particles in the aquifer from entering the water filter flower tube and reduce the sand-containing water entering the water filter flower tube. quantity.

The ground integrated receiving device 1 includes a monitoring system main control station, a data storage backup server, and a ground telemetry system sub-station. The ground telemetry system sub-station receives the water level, water temperature, and drainage water flow signals detected by the water level and water temperature sensor and the magnetic vortex flow sensor. It is backed up to the data storage backup server, and sent to the main control station of the monitoring system at the same time to realize the data collection, processing and query functions of the hydrogeological parameters of the aquifer.

Example:

Combined with the successful case of the bottom aquifer (bottom containing) of a huge thick loose layer in a mine of Yankuang Group in the North China coalfield, firstly, as shown in Figure 2, the structure of the Quaternary bottom containing pumping test drilling is as follows:

(1) The diameter of 0-124.94m is Ф270mm, and the Ф194×8mm anti-wire water stop casing a and the Ф240mm taper water stop are installed, and the pipe is fully solidified with cement slurry;

(2) 124.94-154.20m hole diameter Ф250mm, among which, 127.94-154.20m is put into Ф194×6mm water filter flower tube, 8# iron wire is welded outside the tube, and 120 mesh nylon mesh is covered with three layers, and 16# iron wire with a spacing of 0.15m is used externally. Sectional bundling; 156.00-158.00m run into Ф146×8mm sand settling solid pipe and Ф127×4mm sand settling casing, and use cement slurry to fully solidify the pipe;

(3) 158.00-225.00m hole diameter Ф113mm, run down Ф89×4.5mm reverse wire water stop casing b, and use cement slurry to fully solidify the pipe.

Secondly, the construction method and sequence of the drilling are as follows:

(1) Use a Ф146mm drill bit to drill coreless to 70.00m, and use a Ф94mm drill bit to core and drill to 180.73m, and perform digital logging.

(2) After digital logging, use a Ф270mm reaming bit to ream to 124.94m, and use a Ф250mm drill to ream to 158.00m. Run down Ф146mm casing, Ф194mm casing, Ф194mm flower tube and Ф240mm taper water stop to stop water, use cap grouting method to solidify the pipe, use 4900kg of cement and 2940kg of clean water to fix the pipe. Check the water stop after the cement has set.

(3) The water stop inspection adopts the pressure method, that is, the casing is filled with water, and the water level in the pipe is observed continuously for 3 hours, and the water level in the pipe rises or falls less than 2cm per hour, which is considered qualified;

(4) After the water stop inspection is qualified, the water stop plate is opened, and the Ф94mm core is used to drill to 215.02m, and the Ф113mm coreless drill is used to drill to 224.40m for digital logging.

(5) After logging, run the Ф89mm casing, and use 500kg of cement and 300kg of clean water to fix the pipe.

(6) After the cement is solidified, drill down the hole 224.35m, use yellow mud cement to form a mud ball to seal the hole, and use a drilling tool to press it to 152.00m.

(7) Well cleaning methods such as drill pipe injection method, chemical composition soaking method, bucket lifting water, piston and deep well pump pumping are used for well cleaning.

(8) After the pumping test is over, the coordinates are re-measured, and the project is over.

Finally, carry out the pumping test: according to the demand, this hole will carry out the pumping test of the lower Quaternary sand layer.

(1) Aquifer

The pumping section is the lower Quaternary sand section, with a burial depth of 139.15-154.20m and a layer thickness of 15.05m. The lithology is composed of fine sand, clay fine sand and clay silt. Among them, the thickness of fine sand is 10.65m, the thickness of clay fine sand is 3.42m, and the thickness of clay silt is 0.98m. The total thickness of the aquifer is 15.05m.

(2) Observation of well flushing, test pumping and static water level

After the water stop inspection is qualified, first use the flower drill pipe to carry out the jetting method, the bucket lifting method and the deep well pumping method to wash the well until the water is clean and sandy; the unit water inflow q measured by the test pump is about 0.048L/( s.m).

(3) Formal pumping

The equipment used in this pumping includes triangular weir, electric water level gauge, steel tape measure, thermometer, water sample bucket, etc. A total of one drawdown pumping test was carried out. The water pumping test took place from 12:00 on February 15, 2016 to 18:00 on February 17, 2016, for a total of 54 hours, the water level stabilization time was 8 hours, the first moving water level was 139.47m, and the drawdown was 5.15m; The second moving water level is 144.67m and the drawdown is 10.35m; the third moving water level is 149.79m and the drawdown is 15.47m. During the pumping process, the water temperature was measured every 2 hours, and the average measured water temperature was 27°C, with little change. After the pumping was completed, the water level was recovered, and the water level recovered to 134.31m and the elevation was -91.91m. After the restoration of water level observation, the exploration hole depth is 151.89m.

The gate valve can be controlled, and the water drainage test can be carried out in a suitable tunnel underground through five flanges with different diameters. Considering that it is to evacuate the water of the Quaternary loose aquifer, the loose sand in the aquifer will be mixed with the water, so a sand net is set up at the beginning, and a sand discharge valve is installed at the lower part, and the sand discharge valve can be opened regularly to clear the sediment. The specific structure of fine sand is shown in Figure 3. The flow of the drainage water can be transmitted to the underground flow automatic recorder through the magnetic vortex flow sensor, and the flow data can be recorded automatically, and it can also be transmitted to the ground integrated receiving system through the telephone line or the special laying of the relevant network cable. Since the bottom of the Quaternary system is weakly water-rich, in order to enable the flow sensor to sense the flow, the downhole water discharge pipeline is reduced in diameter five times, and the diameter of the water discharge pipeline is gradually reduced, and the effect is better. Among them, the automatic flow recorder 23 can be installed in the sensor protective cover.

To sum up, the present invention generally adopts independent methods to carry out the water pumping test and the water drainage test of a certain aquifer at present. Generally, the water pumping test is carried out through the ground construction drilling, and the actual situation of the underground construction of the drainage drilling hole is designed. And implemented a ground through-hole drilling device that integrates water pumping and water drainage tests. The drilling device is mainly composed of three parts: the ground comprehensive receiving system, the pumping test and the drainage test. It fully considers the needs of the pumping test or the drainage test. One hole is used for two purposes. Automatically monitor quantitative data such as water level and water temperature in target aquifers.

By means of the characteristics of easy construction on the ground, combined with the upper and lower comparison diagrams of the well, the invention constructs a ground through-hole drilling device that integrates water pumping and water drainage tests, and can monitor the properties of aquifers pre-explored at a certain depth underground in real time. Through the ground construction and the direct access to the underground hole, the water pumping test or the water drainage test can be carried out at any time by using the gate valve installed in the roadway in advance, and the water level and water temperature data can be received in real time on the ground, so as to accurately quantify and judge the monitored hydrogeological parameters of the aquifer. . The device is especially suitable for the situation that the underground roadway is not suitable for the construction of the drainage hole, and then the construction is convenient on the ground according to the position map of the upper and lower wells. While realizing the water pumping and drainage test, it can monitor the water level, water temperature and other states of an aquifer in real time, and solve the cumbersome process, complicated process, difficult to control and cannot be used for the ground caused by the current water pumping and drainage test. The problem of long-distance automatic monitoring. In general, the present invention has the following advantages:

(1) The ground is convenient for construction, which integrates three parts, and water pumping and water discharge can be carried out interactively according to needs;

(2) It can automatically collect and analyze data in real time, and the calculated data is easy to obtain and reliable;

(3) Save drilling costs, adjust the evacuation amount according to needs, and can be used for a long time.

Claims (4)

1. a ground straight through downhole drilling device that collects pumping and draining water test in one, comprises the pumping test device for carrying out the pumping test and is installed in the underground tunnel for carrying out the draining water test device for the water draining test, it is characterized in that In addition, it also includes a borehole directly connected to the downhole from the ground and a ground integrated receiving device for real-time monitoring of the state of the aquifer, Inside the borehole are sequentially arranged from the ground to the downhole with a reverse wire water stop casing a, a taper water stopper, a water filter flower tube, a sand settling solid pipe and a reverse wire water stop casing b, and the water filter flower tube is located in the aquifer and sinks. The sand solid pipe is arranged with a sand settling casing; the reverse wire water stop casing a, the taper water stopper, the sand settling solid tube and the reverse wire water stop casing b are all solid pipes through the cement slurry; water level water temperature sensor; The water drainage test device includes five flanges with different diameters and a water discharge pipeline connecting the flanges. The five flanges are arranged in the underground tunnel with different diameters step by step. The second flange, the third flange, the fourth flange and the fifth flange, the drain pipe between the first flange and the second flange is a T-shaped pipe, which is useful for installation in the T-shaped pipe For the sand screen for filtering sand particles, a sand discharge valve is installed at the bottom of the T-shaped pipe; a magnetic vortex flow sensor for detecting the flow of drainage water is installed on the water discharge pipe between the third flange and the fourth flange; The bottom of the borehole is connected to the drainage test device through a drainage pipe, and a gate valve is installed on the drainage pipe; The water level water temperature sensor and the magnetic vortex flow sensor transmit the detected data to the ground comprehensive receiving device; By drilling holes and using gate valves, the pumping test or drainage test can be carried out at any time, and the water level and water temperature data can be received in real time on the ground, so as to accurately quantify and judge the hydrogeological parameters of the monitored aquifer. 2. a kind of ground straight-through downhole drilling device that integrates water pumping and drainage test according to claim 1, is characterized in that, the outside of described water-filtering flower tube is welded with iron wire, outsourcing three layers of nylon mesh, nylon mesh The outer side is bundled with iron wire. 3. The ground through-hole drilling device integrating water pumping and water drainage test according to claim 1, is characterized in that, described ground comprehensive receiving device comprises monitoring system master control station, data storage backup server and ground The telemetry system substation and the ground telemetry system substation receive the water level and water temperature and drainage water flow signals detected by the water level water temperature sensor and the magnetic vortex flow sensor, and back them up to the data storage backup server, and send them to the monitoring system main control station at the same time. Data collection, processing and query functions for hydrogeological parameters of aquifers. 4. a kind of ground straight through downhole drilling device integrating water pumping and water drainage test according to claim 1, is characterized in that, the concrete structure of described drilling is: (1) The diameter of 0-124.94m is Ф270mm, and the Ф194×8mm anti-wire water stop casing a and the Ф240mm taper water stop are installed, and the pipe is fully solidified with cement slurry; (2) 124.94-154.20m hole diameter Ф250mm, among which, 127.94-154.20m is put into Ф194×6mm water filter flower tube, 8# iron wire is welded outside the tube, and 120 mesh nylon mesh is covered with three layers, and 16# iron wire with a spacing of 0.15m is used externally. Sectional bundling; 156.00-158.00m run into Ф146×8mm sand settling solid pipe and Ф127×4mm sand settling casing, and use cement slurry to fully solidify the pipe; (3) 158.00-225.00m hole diameter Ф113mm, run down Ф89×4.5mm reverse wire water stop casing b, and use cement slurry to fully solidify the pipe.