CN111022036A - Method for detecting damage of well pipe - Google Patents
Method for detecting damage of well pipe Download PDFInfo
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- CN111022036A CN111022036A CN201911009634.2A CN201911009634A CN111022036A CN 111022036 A CN111022036 A CN 111022036A CN 201911009634 A CN201911009634 A CN 201911009634A CN 111022036 A CN111022036 A CN 111022036A
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- 238000000034 method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000002349 well water Substances 0.000 claims abstract description 21
- 235000020681 well water Nutrition 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 3
- 238000000547 structure data Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000003384 imaging method Methods 0.000 description 3
- 230000035622 drinking Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000007 visual effect Effects 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sewage (AREA)
- Pipeline Systems (AREA)
Abstract
The invention provides a well pipe damage detection method, which comprises the following steps: a. preparing a set of liquid level adjacent ultra-deep sampling device; b. measuring the distance between the surface of the well water in the well to be measured and the well mouth; c. intercepting a water inlet pipe with corresponding length, and preparing a lifting rope with the length exceeding the total length of the well pipe; d. one end of the intercepted water inlet pipe is fixedly connected to the lower port of the ejector suction chamber, the other end of the intercepted water inlet pipe is fixedly connected to the interface of the lace pipe pendant, the exhaust hole of the air pump is connected with the lower port of the nozzle in the ejector suction chamber through the air supply pipe, and one end of the lifting rope is tied to the lace pipe pendant; e. a flower net pipe drop, a water inlet pipe, a jet device, a water outlet pipe and an air supply pipe which are connected in sequence are put down in a well to be tested, and meanwhile, a lifting rope is also put down together; f. starting the air pump, continuously pumping out the water body at the position of the flower net pipe pendant in the well, releasing the flower net pipe pendant through the lifting rope, observing whether the color of the water body pumped out at the position corresponding to the flower net pipe pendant changes, and determining the depth position of the damaged well pipe.
Description
Technical Field
The invention relates to a well pipe damage detection technology, in particular to a well pipe damage detection method.
Background
Along with the service life of a well, the pipe wall of the well pipe can be broken, and underground water carrying silt seeps into the well from the broken opening, so that the well water is turbid and polluted, and the quality of the well water is influenced. As the current built water well is deeper and deeper, and the diameter of the well pipe is smaller and smaller, great difficulty is brought to the damage detection of the well wall in the deep underwater position. For drinking wells, the damage of the well wall cannot be timely and accurately detected and maintained, so that the whole well can be possibly scrapped, and the economic loss is very large.
At present, the damage detection means of the water well mainly adopts electronic technologies such as an underground television and the like for judgment. And implanting a visual probe in the well to perform imaging observation on the well wall. For a water well with high well water turbidity, the imaging is fuzzy, and the judgment effect is poor; for a water well with damaged multi-section well pipes, because the well water in the damaged sections are mixed, the depth range of the turbid well water distributed in the well is large, the imaging effect on the section of well pipe is poor, and the damaged position of the well pipe cannot be accurately judged. Thus, such techniques are less effective in detection.
Disclosure of Invention
The invention aims to provide a method for detecting damage of a well pipe, which aims to solve the problem that the damage of a narrow long and deep well pipe is difficult to detect.
The invention is realized by the following steps: a method of detecting well pipe damage comprising the steps of:
a. prepare one set and face liquid level ultra-deep sampling device, face liquid level ultra-deep sampling device includes:
the jet device is characterized in that the end part of the upper diffusion section of the jet device is connected with a water outlet pipe used for guiding the water outlet pipe to the ground, scale marks for indicating the length of the water outlet pipe are marked on the pipe wall of the water outlet pipe, and one end for marking the starting point of the scale marks of the water outlet pipe is connected to a water outlet of the jet device;
the air pump is connected with the lower end of a nozzle in the suction chamber of the ejector through an air supply pipe and is used for conveying high-pressure air towards the diffusion section direction of the ejector into the suction chamber of the ejector so as to drive underground water sucked into the chamber to be conveyed towards the ground along the water outlet pipe through negative pressure;
the upper end of the water inlet pipe is connected with the suction chamber of the ejector, and the lower end of the water inlet pipe is connected with the flower net pipe drop; and
the flower net pipe plummet is used for collecting underground water and providing pull-down gravity; the structure is that the bottom of a section of straight-wall lattice net pipe is connected with a conical bottom plate, the top of the straight-wall lattice net pipe is connected with an annular top plate, and the inner circle of the annular top plate is connected with a connector which is used for connecting the water inlet pipe;
b. measuring the distance between the well water liquid level in the well to be measured and the well mouth, and determining the throwing depth of the ejector in the well to be measured according to the distance so that the ejector can be submerged below the well water liquid level after throwing;
c. respectively calculating the distance between the bottom of the well pipe and the well water liquid level and the configuration length of a required water inlet pipe according to well pipe structure data of a well to be detected and measured distance data between the well water liquid level and a well mouth, intercepting the water inlet pipe with corresponding length according to the calculation result, and preparing a lifting rope with the length exceeding the total length of the well pipe;
d. one end of the intercepted water inlet pipe is fixedly connected to the lower port of the ejector suction chamber, the other end of the intercepted water inlet pipe is fixedly connected to the port of the flower net plummet, and the exhaust hole of the air pump is connected with the lower port of the nozzle in the ejector suction chamber through the air supply pipe; tying one end of a lifting rope on the lace pipe pendant;
e. the method comprises the following steps that a flower net pipe drop, a water inlet pipe, an ejector, a water outlet pipe and an air supply pipe which are sequentially connected are placed in a well to be detected, meanwhile, a lifting rope is also placed downwards, after the fact that the placed ejector is completely immersed into the surface of the well water is determined according to the size marked on the pipe wall of the water outlet pipe, the placing operation is stopped, at the moment, the water inlet pipe is straightened in a well pipe by the flower net pipe drop, and the flower net pipe drop is just suspended at the bottom of the well pipe or in the range of a suspected damage section of the well pipe to be;
f. starting an air pump, continuously pumping out the water in the well, then lifting the lifting rope 0.5-1 meter each time, immediately pulling up the flower net pipe pendant connected to the port of the water inlet pipe by 0.5-1 meter, and observing whether the color and the water quality of the water pumped out from the depth position change; when the lifting rope is lifted to a certain position, the color of the water body at the extracted depth is changed, the water quality is turbid, the damaged part on the pipe wall of the well pipe at the position can be determined, the lowering length of the lifting rope at the position is recorded, and the depth of the damaged part of the well pipe can be determined.
When the initial section with changed water quality is determined, the small lifting of the perforated pipe in the damaged section of the well pipe is controlled by the lifting rope, and the most serious part with dirty water quality is observed, namely the accurate position of the damaged well pipe is determined.
When the method is adopted to detect the damage of the well pipe, the ejector is just immersed below the liquid level in the well, the port of the diffusion end of the ejector is led to the ground through the water outlet pipe, the water inlet pipe connected with the lower port of the suction chamber is arranged in the deep well, the air pump is connected with the suction chamber through the air supply pipe to deliver high-pressure air into the suction chamber, so that the water in the suction chamber is delivered to the water sample collecting device on the ground along the water outlet pipe, because the jet device is only arranged below the liquid level and the water inlet of the jet device is prolonged downwards through the water inlet pipe and the flower net pipe drop which are connected with the lower part, the ejector is only required to be arranged below the liquid level, so that the range limit of the ejector is virtually eliminated, thereby pumping water bodies in well pipes with different depths by measuring the net pipe plummets laid under the lifting ropes, therefore, whether the wall of the well pipe at the position of the floral tube plummet is damaged or not is judged according to the turbidity of the water body.
The well pipe damage detection method is simple to operate, accurate in detection, economical and reliable, is particularly suitable for damage detection of drinking wells, and effectively solves the problem that damage of narrow long and deep well pipes is difficult to detect.
Drawings
FIG. 1 is a schematic diagram of a well pipe damage detection using an ultra-deep near-liquid sampling device.
In the figure: 1. a water outlet pipe; 2. an air pump; 3. an air supply pipe; 4. a diffuser section; 5. a throat section; 6. a suction chamber; 7. a well pipe; 8. a water inlet pipe; 9. the lace pipe pendant; 10. a filter; 11. an ejector; 12. a nozzle; 13. a lifting rope.
Detailed Description
The method for detecting the damage of the well pipe comprises the following steps:
firstly, a set of near liquid level ultra-deep sampling device is prepared, and the near liquid level ultra-deep sampling device comprises a jet device 11, an air pump 2, a water inlet pipe 8, a flower net pipe pendant 9 and the like as shown in figure 1.
The ejector 11 may be a commercially available ejector, and includes a suction chamber 6, a nozzle 12 disposed in the suction chamber 6, a throat section 5 connected to an upper port of the suction chamber 6, and a diffuser section 4 connected to an upper port of the throat section 5. The upper port of the diffusion end 4 of the ejector is connected with a water outlet pipe 1, and the other end of the water outlet pipe 1 is led to the ground. The pipe wall of the water outlet pipe 1 is marked with scale marks for indicating the length of the water outlet pipe 1.
The air pump 2 is arranged on the ground close to the well pipe 7, the exhaust hole of the air pump is connected with the lower end of a nozzle 12 of the ejector 11 through the air feeding pipe 3, and the air pump is used for conveying high-pressure air upwards along the diffusion section 4 into the suction chamber 6 through the nozzle 12, the high-pressure air is mixed with underground water in the suction chamber 6 to form high-speed water-gas mixed flow, and the underground water in the suction chamber 6 is promoted to be conveyed towards the ground along the water outlet pipe.
The upper end of the water inlet pipe 8 is connected with the lower port of the suction chamber 6 of the ejector 11, and the lower end is connected with the lace pipe pendant 9. The perforated pipe drop 9 is used for collecting and filtering underground water and providing pull-down gravity for the water inlet pipe 8. The lattice pipe drop 9 is formed by connecting a conical bottom plate at the bottom of a section of straight arm lattice pipe, connecting an annular top plate at the top of the straight arm lattice pipe, and connecting a connector at the inner circle of the annular top plate, wherein the connector is connected with a water inlet pipe 8.
In order to prevent the cavity of the suction chamber 6 of the ejector from being incapable of replenishing groundwater in time, the cross section area of the water outlet pipe 1 is smaller than that of the water inlet pipe 8.
And secondly, measuring the distance between the well water level in the well to be measured and the well mouth, and determining the throwing depth of the ejector 11 in the well to be measured according to the distance so as to enable the ejector 11 to be submerged below the well water level after throwing.
And thirdly, respectively calculating the distance between the bottom of the well pipe 7 and the well water liquid level and the configuration length of the required water inlet pipe 8 according to the well pipe 7 structure data of the well to be detected and the measured data of the distance between the well water liquid level and the wellhead, intercepting the water inlet pipe 8 with the corresponding length according to the calculation result, and preparing a lifting rope 13 with the length exceeding the total length of the well pipe 7.
And fourthly, fixedly connecting one end of the intercepted water inlet pipe 8 to the lower port of the suction chamber 6 of the ejector 11, fixedly connecting the other end of the intercepted water inlet pipe 8 to a port of the flower net pipe pendant 9, connecting an exhaust hole of the air pump 2 with the lower port of a nozzle 12 in the suction chamber 6 of the ejector 11 through the air supply pipe 3, and tying one end of a lifting rope 13 to the flower net pipe pendant 9.
Fifthly, lowering the flower net pipe weight 9, the water inlet pipe 8, the ejector 11, the water outlet pipe 1 and the air feed pipe 3 which are sequentially connected in the well to be tested, simultaneously lowering the lifting rope 13, stopping lowering operation after determining that the lowered ejector 11 is totally submerged into the well water liquid level according to the size marked on the pipe wall of the water outlet pipe 1, straightening the water inlet pipe 8 in the well pipe 7 through the flower net pipe weight 9, and hanging the flower net pipe weight 9 at the bottom of the well pipe 7.
Sixthly, starting the air pump 2, continuously pumping out the water in the well, then lifting the lifting rope for 0.5-1 meter, immediately pulling up the flower net pipe drop 9 connected to the port of the water inlet pipe 8 for 0.5-1 meter, and observing whether the color and the water quality of the water pumped out from the depth position change; if the water quality does not change, continuously lifting the lifting rope for 0.5-1 m, and observing whether the color and the water quality of the water body pumped out from the depth change; repeating the above operations until the color of the water body at the extracted depth changes and the water quality is turbid when the lifting rope is lifted to a certain position, determining the damaged position on the pipe wall of the well pipe at the position, recording the lowering length of the lifting rope 13 at the position, and determining the depth of the damaged position of the well pipe 7.
Seventhly, in an initial section with changed water quality, the flower net pipe drop 9 is controlled to lift slightly in the damaged section of the well pipe through the lifting rope 13, and the most serious part with dirty water quality can be observed, namely the accurate position of the damaged well pipe.
Claims (2)
1. A method for detecting well pipe breakage is characterized by comprising the following steps:
a. prepare one set and face liquid level ultra-deep sampling device, face liquid level ultra-deep sampling device includes:
the jet device is characterized in that the end part of the upper diffusion section of the jet device is connected with a water outlet pipe used for guiding the water outlet pipe to the ground, scale marks for indicating the length of the water outlet pipe are marked on the pipe wall of the water outlet pipe, and one end for marking the starting point of the scale marks of the water outlet pipe is connected to a water outlet of the jet device;
the air pump is connected with the lower end of a nozzle in the suction chamber of the ejector through an air supply pipe and is used for conveying high-pressure air towards the diffusion section direction of the ejector into the suction chamber of the ejector so as to drive underground water sucked into the chamber to be conveyed towards the ground along the water outlet pipe through negative pressure;
the upper end of the water inlet pipe is connected with the suction chamber of the ejector, and the lower end of the water inlet pipe is connected with the flower net pipe drop; and
the flower net pipe plummet is used for collecting underground water and providing pull-down gravity; the structure is that the bottom of a section of straight-wall lattice net pipe is connected with a conical bottom plate, the top of the straight-wall lattice net pipe is connected with an annular top plate, and the inner circle of the annular top plate is connected with a connector which is used for connecting the water inlet pipe;
b. measuring the distance between the well water liquid level in the well to be measured and the well mouth, and determining the throwing depth of the ejector in the well to be measured according to the distance so that the ejector can be submerged below the well water liquid level after throwing;
c. respectively calculating the distance between the bottom of the well pipe and the well water liquid level and the configuration length of a required water inlet pipe according to well pipe structure data of a well to be detected and measured distance data between the well water liquid level and a well mouth, intercepting the water inlet pipe with corresponding length according to the calculation result, and preparing a lifting rope with the length exceeding the total length of the well pipe;
d. one end of the intercepted water inlet pipe is fixedly connected to the lower port of the ejector suction chamber, the other end of the intercepted water inlet pipe is fixedly connected to the port of the flower net plummet, and the exhaust hole of the air pump is connected with the lower port of the nozzle in the ejector suction chamber through the air supply pipe; tying one end of a lifting rope on the lace pipe pendant;
e. the method comprises the following steps that a flower net pipe drop, a water inlet pipe, an ejector, a water outlet pipe and an air supply pipe which are sequentially connected are placed in a well to be detected, meanwhile, a lifting rope is also placed downwards, after the fact that the placed ejector is completely immersed into the surface of the well water is determined according to the size marked on the pipe wall of the water outlet pipe, the placing operation is stopped, at the moment, the water inlet pipe is straightened in a well pipe by the flower net pipe drop, and the flower net pipe drop is just suspended at the bottom of the well pipe or in the range of a suspected damage section of the well pipe to be;
f. starting an air pump, continuously pumping out the water in the well, then lifting the lifting rope 0.5-1 meter each time, immediately pulling up the flower net pipe pendant connected to the port of the water inlet pipe by 0.5-1 meter, and observing whether the color and the water quality of the water pumped out from the depth position change; when the lifting rope is lifted to a certain position, the color of the water body at the extracted depth is changed, the water quality is turbid, the damaged part on the pipe wall of the well pipe at the position can be determined, the lowering length of the lifting rope at the position is recorded, and the depth of the damaged part of the well pipe can be determined.
2. The method according to claim 1, wherein the initial zone in which the water quality has changed is determined, and the mesh tube is controlled by the hoisting rope to be lifted and lowered slightly in the damaged zone of the well tube, and the position where the water quality is most polluted is observed, that is, the position where the well tube is damaged is determined to be the exact position.
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| CN201911009634.2A CN111022036B (en) | 2019-10-23 | 2019-10-23 | Method for detecting damage of well pipe |
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