CN113123744A - Gas-water mixed well washing device and well washing method - Google Patents
Gas-water mixed well washing device and well washing method Download PDFInfo
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- CN113123744A CN113123744A CN202110632043.1A CN202110632043A CN113123744A CN 113123744 A CN113123744 A CN 113123744A CN 202110632043 A CN202110632043 A CN 202110632043A CN 113123744 A CN113123744 A CN 113123744A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000005406 washing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims description 11
- 238000004891 communication Methods 0.000 claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims description 14
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a gas-water mixing well washing device, which comprises: a water pump; the drilling machine is characterized in that the lower end of a drill rod of the drilling machine is connected with a drill bit, a jet orifice is arranged on the drill bit, a communication hole is formed in the drill rod along the length direction of the drill rod, the lower end of the communication hole is communicated with the jet orifice of the drill bit, and the upper end of the communication hole is communicated with a water pump through a pipeline; further comprising: and the air pump is communicated with the upper end of the communicating hole through a pipeline. The device gives consideration to well washing power and the cleaning degree of well wall mud skin under the conditions of no environmental pollution and no need of cleaning again.
Description
Technical Field
The invention relates to a gas-water mixed well washing device and a well washing method, and belongs to the technical field of well washing.
Background
The geothermal well washing is to destroy and wash away mud skin formed on a well wall by a well washing process, so that a well wall crack communicated with a aquifer is opened, and the water yield and the water outlet temperature of a well are increased. The existing well washing technology is mainly divided into two categories, namely physical well washing and chemical well washing.
Chemical well flushing refers to the action of breaking the mud skin of the well wall and dredging the blockage through the dissolution and separation of chemical reaction and the pressure action generated by chemical change. Such as sodium pyrophosphate well washing, hydrochloric acid well washing, carbon dioxide well washing, etc. But the chemical substances used by chemical well washing can cause environmental pollution, and finally, the well is washed again by clean water until the water is sand-cleaned;
in order to solve the problems that the chemical well washing pollutes the environment and needs to be cleaned again, technical personnel in the field carry out various attempts to wash the well of the hot spring well by adopting a physical well washing method.
The physical well washing method comprises the following steps: the mud skin on the well wall is damaged through the pumping, pressing, impacting and vibrating actions generated by the well washing equipment. Such as wall breaking gun well washing, piston well washing, compressed air well washing and the like.
The well washing by the wall breaking gun is to use a steel pipe with 50-80mm smaller diameter than the well hole, and to drill a pore on the steel pipe, and to use the high-pressure and high-flow water flow of the slurry pump to wash the well wall.
The piston well-flushing is also called piston pulling, that is, a soft material slightly larger than the well diameter is repeatedly pumped up and down in the water producing well section. The piston is pulled in stages. The well pipe is not strong enough and is easy to be broken by the piston. A large amount of sand is likely to be introduced in the fine grained water production layer.
The compressed air well washing is to discharge liquid in the well by a pressure fan, and to destroy mud on the well wall by using the pressure difference between formation water and air in the well shaft. Too deep a dynamic water level is not suitable.
However, in the hot spring well drilling, the depth of the hot spring well drilling is usually over 2000 meters in order to obtain water with sufficient temperature, when the existing physical well washing technology is used for the hot spring well washing, in order to generate enough impact on the mud skin of the well wall to damage the mud skin, power must be added to a mud pump, a piston and a gas pump, the problems of wall breaking gun well washing and compressed air well washing are that cost investment is increased, the problems of piston well washing are that besides the cost investment is increased, the well pipe is easier to damage due to the increase of the power of the piston, and a large amount of sand entering is easily caused in a fine-grained water production layer.
The above technical problems are due to the nature of mechanical well cleanout itself and are at present insurmountable.
The existing well washing process has the defects of the technical idea, so that the well washing power and the well wall mud skin cleaning degree can not be considered all the time under the conditions of no environmental pollution and no need of cleaning again.
The existence of the technical problem hinders the further development of the prior art. Meanwhile, because the problem is caused by the defects of the technical idea of the prior art, the prior art cannot solve the technical problem with technical contradiction, and therefore, the requirement that the well washing power is lower under the conditions of no environmental pollution and no need of cleaning again is a technical problem which is desired to be solved but is not successful all the time in the technical field.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a gas-water mixed well washing device and a well washing method, which overcome the defects of the prior art.
The technical scheme of the invention is as follows: a gas-water mixing well-flushing device comprising:
a water pump;
the drilling machine is characterized in that the lower end of a drill rod of the drilling machine is connected with a drill bit, a jet orifice is arranged on the drill bit, a communication hole is formed in the drill rod along the length direction of the drill rod, the lower end of the communication hole is communicated with the jet orifice of the drill bit, and the upper end of the communication hole is communicated with a water pump through a pipeline;
further comprising:
and the air pump is communicated with the upper end of the communicating hole through a pipeline.
Further, still include:
the first electric valve is arranged on the pipeline between the water pump and the communication hole;
the second electric valve is arranged on the pipeline between the air pump and the communication hole;
and the controller is electrically connected with the first electric valve and the second electric valve.
Further, still include:
the water pressure sensor is arranged on a pipeline between the first electric valve and the communication hole and is electrically connected with the controller;
and the air pressure sensor is arranged on a pipeline between the second electric valve and the communication hole and is electrically connected with the controller.
Further, still include:
and the water pump and the air pump are communicated with the communicating hole together through the gas-water mixer.
Further, the gas-water mixer includes:
the air pump is characterized by comprising a shell, wherein the shell is cylindrical, an air-water mixing jet orifice is arranged on the upper surface of the shell and is communicated with a communicating hole through a pipeline, an air inlet and a water inlet are arranged on the lower surface of the shell, the air inlet is communicated with an air pump through a pipeline, and the water inlet is communicated with a water pump through a pipeline;
the impeller, the impeller matches with the inner chamber of casing, and the impeller rotates to be installed in the inner chamber of casing, and the impeller pivot is parallel with casing axis.
A gas-water mixing well washing method comprises the following steps: when the well is washed, the gas-water mixture is conveyed to the position to be cleaned of the well to wash the well wall.
Further, the gas-water mixture is conveyed to the drill jet through the drill stem.
The invention has the beneficial effects that:
1) according to the invention, under the condition of not increasing the well washing power, a gas-water mixture is generated by the water pump and the air pump, then the drilling well wall to be cleaned is washed by the gas-water mixture through the drill bit, bubbles in the gas-water mixture collide with the mud skin of the well wall at a high speed to generate a cavitation effect, so that the mud skin is washed clean, further, the crack of the well wall communicated with the aquifer is opened, the water yield and the water outlet temperature of the well are increased, and the well washing cost is saved; because a chemical well washing process is not used, the environment is not polluted, and the cleaning is not needed again, so that the technical problem which is eagerly solved for a long time in the technical field is solved;
2) the water pressure conveyed to the drill bit by the water pump is controlled by the first electric valve, and the air pressure conveyed to the drill bit is controlled by the second electric valve;
3) according to the invention, the water pressure sensor is used for detecting the water pressure delivered to the drill bit by the water pump to form feedback, so that the water pressure control is more accurate, and the air pressure sensor is used for detecting the air pressure delivered to the drill bit by the air pump to form feedback, so that the air pressure control is more accurate;
4) if the air pipe and the water pipe are directly connected in parallel, the formed air-water mixture has larger bubbles and is uneven, and the cleaning effect on the mud skin of the well wall is poor, the air-water mixer is used for uniformly mixing air and water, so that the water flow sprayed to the well wall of the drilled well is filled with the bubbles, the bubbles are smaller and more uniform, and the mud skin of the well wall of the drilled well is better washed by the air-water mixture;
5) according to the invention, the impeller is pushed to rotate by the self pressure of the air flow and the water flow, external energy supply is not needed, the impeller rotates to drive the air flow and the water flow to be uniformly mixed, and the bubbles are cut to be smaller, so that the effects of generating smaller and more uniform bubbles and having better washing effect on mud skin on the wall of a drilling well are achieved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gas-water mixer according to an embodiment of the present invention;
FIG. 3 is a circuit connection block diagram according to an embodiment of the invention.
Detailed Description
The technical scheme in the embodiment of the invention has the following general idea:
the well is washed by the gas-water mixture, bubbles in the gas-water mixture collide with the mud skin of the well wall of the well 5 at a high speed to generate a cavity effect, so that the mud skin is washed clean, further, the well wall crack communicated with the aquifer is opened, the water yield and the water outlet temperature of the well 5 are increased, and the environment is not polluted and does not need to be washed again because a chemical well washing process is not used.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1 was carried out: referring to fig. 1 to 3, a gas-water mixing well-flushing device includes: a water pump 2; the drilling machine 1 is characterized in that the lower end of a drill rod 1-1 of the drilling machine 1 is connected with a drill bit 1-2, a jet orifice is arranged on the drill bit 1-2, a communication hole is formed in the drill rod 1-1 along the length direction of the drill rod 1-1, the lower end of the communication hole is communicated with the jet orifice of the drill bit 1-2, and the upper end of the communication hole is communicated with a water pump 2 through a pipeline; further comprising: and the air pump 3 is communicated with the upper end of the communicating hole through a pipeline.
The first electric valve 2-1 is arranged on a pipeline between the water pump 2 and the communication hole; the second electric valve 3-1 is arranged on the pipeline between the air pump 3 and the communication hole; the controller 6 is connected with the first electric valve 2-1 through a wire or in a wireless mode, and the controller 6 is connected with the second electric valve 3-1 through a wire or in a wireless mode.
The water pressure sensor 2-2 is arranged on a pipeline between the first electric valve 2-1 and the communication hole, and the water pressure sensor 2-2 is connected with the controller 6 through a lead or in a wireless way; the air pressure sensor 3-2 is arranged on a pipeline between the second electric valve 3-1 and the communication hole, and the air pressure sensor 3-2 is connected with the controller 6 through a lead or in a wireless mode.
The water pump 2 and the air pump 3 are communicated with the communicating hole through an air-water mixer 4.
The gas-water mixer 4 includes: the air pump comprises a shell 4-1, wherein the shell 4-1 is cylindrical, an air-water mixing nozzle 4-5 is arranged on the upper surface of the shell 4-1, the air-water mixing nozzle 4-5 is communicated with a communicating hole through a pipeline, an air inlet 4-4 and a water inlet 4-3 are arranged on the lower surface of the shell 4-1, the air inlet 4-4 is communicated with an air pump 3 through a pipeline, and the water inlet 4-3 is communicated with a water pump 2 through a pipeline; the impeller 4-2, the impeller 4-2 matches with the cavity of the body 4-1, the impeller 4-2 is installed in the cavity of the body 4-1 rotatably, the impeller 4-2 spindle is parallel to axle wire of the body 4-1.
A gas-water mixing well washing method comprises the following steps: when the well is washed, the gas-water mixture is conveyed to the position to be cleaned of the well to wash the well wall.
Further, the gas-water mixture is conveyed to the jet orifice of the drill bit 1-2 through the drill rod 1-1.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A gas-water mixing well-flushing device comprising:
a water pump (2);
the drilling machine (1), the lower end of a drill rod (1-1) of the drilling machine (1) is connected with a drill bit (1-2), a jet orifice is arranged on the drill bit (1-2), a communication hole is arranged in the drill rod (1-1) along the length direction of the drill rod (1-1), the lower end of the communication hole is communicated with the jet orifice of the drill bit (1-2), and the upper end of the communication hole is communicated with a water pump (2) through a pipeline;
it is characterized by also comprising:
the air pump (3) is communicated with the upper end of the communicating hole through a pipeline.
2. The gas-water mixing well-flushing device of claim 1, further comprising:
the first electric valve (2-1), the first electric valve (2-1) is arranged on the pipeline between the water pump (2) and the communication hole;
the second electric valve (3-1), the said second electric valve (3-1) is set up on the pipeline between air pump (3) and intercommunicating pore;
the controller (6) is electrically connected with the first electric valve (2-1), and the controller (6) is electrically connected with the second electric valve (3-1).
3. The gas-water mixing well-flushing device of claim 2, further comprising:
the water pressure sensor (2-2), the water pressure sensor (2-2) is arranged on a pipeline between the first electric valve (2-1) and the communication hole, and the water pressure sensor (2-2) is electrically connected with the controller (6);
the air pressure sensor (3-2) is arranged on the pipeline between the second electric valve (3-1) and the communication hole, and the air pressure sensor (3-2) is electrically connected with the controller (6).
4. The gas-water mixing well-flushing device according to any one of claims 1 to 3, further comprising:
and the water pump (2) and the air pump (3) are communicated with the communicating hole together through the gas-water mixer (4).
5. The gas-water mixing well-flushing device according to claim 4, characterized in that the gas-water mixer (4) comprises:
the air pump comprises a shell (4-1), wherein the shell (4-1) is cylindrical, an air-water mixing nozzle (4-5) is arranged on the upper surface of the shell (4-1), the air-water mixing nozzle (4-5) is communicated with a communicating hole through a pipeline, an air inlet (4-4) and a water inlet (4-3) are arranged on the lower surface of the shell (4-1), the air inlet (4-4) is communicated with an air pump (3) through a pipeline, and the water inlet (4-3) is communicated with a water pump (2) through a pipeline;
the impeller (4-2), the impeller (4-2) matches with the inner cavity of the casing (4-1), the impeller (4-2) is rotatably installed in the inner cavity of the casing (4-1), and the rotating shaft of the impeller (4-2) is parallel to the central axis of the casing (4-1).
6. A gas-water mixed well washing method is characterized in that the well washing method comprises the following steps:
when the well is washed, the gas-water mixture is conveyed to the position to be cleaned of the well to wash the well wall.
7. A gas-water mixture well-flushing method as claimed in claim 6, characterized in that the gas-water mixture is delivered to the jet orifice of the drill bit (1-2) through the drill pipe (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632043.1A CN113123744A (en) | 2021-06-07 | 2021-06-07 | Gas-water mixed well washing device and well washing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632043.1A CN113123744A (en) | 2021-06-07 | 2021-06-07 | Gas-water mixed well washing device and well washing method |
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| CN113123744A true CN113123744A (en) | 2021-07-16 |
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| CN202110632043.1A Pending CN113123744A (en) | 2021-06-07 | 2021-06-07 | Gas-water mixed well washing device and well washing method |
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