CN113338803A - Ground immersion process drilling windowing cutting tool and windowing method - Google Patents
Ground immersion process drilling windowing cutting tool and windowing method Download PDFInfo
- Publication number
- CN113338803A CN113338803A CN202110839356.4A CN202110839356A CN113338803A CN 113338803 A CN113338803 A CN 113338803A CN 202110839356 A CN202110839356 A CN 202110839356A CN 113338803 A CN113338803 A CN 113338803A
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- China
- Prior art keywords
- piston
- cylinder sleeve
- windowing
- blade
- cutter bar
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Abstract
The windowing cutting tool comprises an upper joint, a cylinder sleeve, a piston, a cylinder body, a blade, a cutter bar and a return spring; the upper joint is connected with the upper end of the cylinder sleeve, the piston is installed in the cylinder sleeve, a throttling water nozzle is arranged in the piston, the cutter bar is installed in the cylinder sleeve and the cylinder body, one end of the cutter bar is connected with the piston, the other end of the cutter bar is in movable contact with the blade, a water guide groove is formed in the cutter bar and communicated with the throttling water nozzle, the reset spring is installed outside the cutter bar and connected with the cylinder sleeve and the piston, the cylinder body is connected with the lower end of the cylinder sleeve, and the blade is installed on the cylinder body. The invention also provides a drilling and windowing method for the in-situ leaching process. By utilizing the method, the local cutting of the target layer can be realized, the installation and the replacement of the built-in filter for in-situ leaching uranium mining can be realized, the later-stage operation well flushing work is reduced, and the service life of the drilling of the in-situ leaching process is prolonged.
Description
Technical Field
The invention relates to a drilling and windowing device and a windowing method for a ground soaking process, in particular to a drilling and windowing cutting tool and a windowing method for a ground soaking process.
Background
The ground leaching process drill hole is the only channel for metal mining of the ground leaching sandstone type uranium mine. The channel is composed of a casing, a filter and a sand setting pipe from top to bottom, is a working channel for forming hydraulic connection between the surface pipeline and the water-containing layer, and is called a production well. In the drilling construction process, cement slurry is required to be filled in an annular space between the inner wall of an open hole drill hole and the outer wall of a drill hole casing pipe for well cementation and sealing. Therefore, the interior of the uranium mining casing pipe and each layer of underground water system can be completely isolated, and the ore layer only passes through the filter and the interior of the casing pipe, so that the hydraulic smoothness is kept, and the ore layer returns to the ground surface, thereby achieving the purpose of mining the target layer metal.
Since 2000 years, a large number of ground-immersed sandstone-type uranium mines are mined domestically, gravel-filled drilling structures are created and perfected, and the gravel-filled drilling structures are continuously perfected and still are one of mainstream drilling structures so far. From 2011, the ground soaks the mine and begins to carry out removable formula built-in filter drilling structure in succession, the naked hole is bored earlier and is accomplished, install the sleeve pipe on seam upper portion again, reverse slip casting back, install built-in filter again and install to the seam position, carry out the mining of seam section, this kind of structure seam and seam lower part and filter between do not handle, be in original stratum state, at the pore-forming initial stage, the stratum is stable, the sediment is less, be not influenced rivers and exploitation, nevertheless through long-time rivers erode, the stratum is unstable, the sediment increases, there is very big influence to the operation of whole drilling.
Disclosure of Invention
The invention aims to solve the technical problem of providing a drilling windowing cutting tool and a windowing method for an in-situ leaching process, which can solve the problems of unstable stratum, increased sediment and influence on the operation of the whole drilled hole.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a drilling, windowing and cutting tool for a ground immersion process, which comprises an upper connector, a cylinder sleeve, a piston, a cylinder body, a blade, a cutter bar and a return spring, wherein the upper connector is fixedly connected with the cylinder sleeve; the upper joint is connected with the upper end of the cylinder sleeve, the piston is installed in the cylinder sleeve, a throttling water nozzle is arranged in the piston, the cutter bar is installed in the cylinder sleeve and the cylinder body, one end of the cutter bar is connected with the piston, the other end of the cutter bar is in movable contact with the blade, a water guide groove is formed in the cutter bar and communicated with the throttling water nozzle, the reset spring is installed outside the cutter bar and connected with the cylinder sleeve and the piston, the cylinder body is connected with the lower end of the cylinder sleeve, and the blade is installed on the cylinder body.
Furthermore, one end of the upper joint is provided with an internal thread for connecting a drill rod, the other end of the upper joint is provided with an external thread for connecting a cylinder sleeve, and the inside of the upper joint is of a hole structure and is communicated with the inside of the cylinder sleeve.
Further, the cylinder sleeve is cylindrical and is of a hollow structure, and inner connecting threads are arranged at two ends of the cylinder sleeve.
Furthermore, the piston is cylindrical, the outer diameter of the piston is the same as the inner diameter of the cylinder sleeve, and the piston is in sealing contact with the cylinder sleeve.
Furthermore, the throttling water nozzle is conical and arranged in the center of the piston, and a water hole is formed in the center of the throttling water nozzle and communicated with the water guide groove.
Furthermore, the barrel is hollow, so that the blade can be conveniently withdrawn.
Further, the blade is installed on the barrel through the rotation axis, and is symmetrical structure.
The technical principle is as follows:
the cutter is connected with a drill rod, the cutter is placed to a position needing to be cut, a pump is connected, a water pressure difference is generated after the pressure of a water column of the pump passes through a water hole, the water pressure compresses a return spring through a piston, a cutter bar is driven to press a blade away from a cylinder body, namely the blade is opened.
The windowing method implemented by the ground immersion process drilling windowing cutting tool comprises the following steps:
after the cement slurry for well cementation is solidified, drilling and cutting can be carried out;
connect the drilling rod with the cutter, transfer the cutting position of design, open the pump on ground and pump into water, it circulates to open the pump, increase the discharge capacity gradually, liquid produces the pressure differential through the throttle water injection well choke, this pressure differential makes the piston overcome reset spring resistance downstream, promote the outside rotation of blade and get into cutting state, the blade is opened this moment, begin cutting work, keep pressure unchangeable in the work, accomplish until the cutting, reduce water pressure, reset spring release, the cutter arbor drives the blade and retrieves, promote the drilling rod, carry out the drilling with a whole set of cutter, accomplish the cutting.
The technical principle is as follows:
the method comprises the steps of firstly completing drilling of a bare hole, installing a plastic casing to be close to the bottom of the hole, then grouting, sealing an annular space between the outside of the casing and the ground layer, cutting off hydraulic connection between the inside of the casing and the ground layer while stabilizing the ground layer, windowing at an ore layer section according to design requirements, namely cutting through the plastic casing and a solidified cement well cementing ring at the ore layer section, communicating the ore layer and the plastic casing to establish hydraulic connection between the ore layer and the casing, and keeping the casing and a cement slurry retaining wall at the bottom of the ore layer to stabilize the ground layer.
The invention has the beneficial effects that:
the realization is to the local cutting of target layer, realizes installation and the change of in-situ leaching uranium mining built-in filter, reduces the later stage operation well-flushing work, prolongs in-situ leaching technology drilling service life.
Drawings
FIG. 1 is a left side view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of the embodiment of FIG. 1;
FIG. 3 is a left side view of the embodiment of FIG. 1, rotated 90 in the reverse direction;
FIG. 4 is a cross-sectional view taken along line F-F of the embodiment of FIG. 3;
in the figure: 1. the water-saving device comprises an upper connector, 2 a cylinder sleeve, 3 a piston, 4 a throttling water nozzle, 5 a cylinder body, 6 a blade, 7 a cutter bar, 8 a return spring and 9 a water guide groove.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Examples
Referring to fig. 1-4, a drilling, windowing and cutting tool for a ground leaching process comprises an upper connector 1, a cylinder sleeve 2, a piston 3, a cylinder 5, a blade 6, a cutter bar 7 and a return spring 8; the upper joint 1 is connected with the upper end of the cylinder sleeve 2, the piston 3 is installed in the cylinder sleeve 2, a throttling water nozzle 4 is arranged in the piston 3, the cutter bar 7 is installed in the cylinder sleeve 2 and the cylinder body 5, one end of the cutter bar 7 is in assembly connection with the piston 3, the other end of the cutter bar is in movable contact with the blade 6, a water guide groove 9 is arranged inside the cutter bar 7, the water guide groove 9 is communicated with the throttling water nozzle 4, the reset spring 8 is installed outside the cutter bar 7 and is in contact with the cylinder sleeve 2 and the piston 3, the cylinder body 5 is connected with the lower end of the cylinder sleeve 2, and the blade 6 is installed on the cylinder body 5.
In this embodiment, one end of the upper joint 1 is provided with an internal thread for connecting a drill rod, and the other end of the upper joint is provided with an external thread for connecting the cylinder sleeve 2, and the inside of the upper joint 1 is of a hole structure and communicated with the inside of the cylinder sleeve 2.
In this embodiment, the cylinder sleeve 2 is cylindrical and has a hollow structure, and the two ends of the cylinder sleeve are provided with internal connecting threads.
In this embodiment, the piston 3 is cylindrical, has the same outer diameter as the inner diameter of the cylinder liner 2, and is in sealing contact with the cylinder liner.
In this embodiment, the throttle water nozzle 4 is conical and is disposed at the center of the piston 3, and a water hole is disposed at the center of the throttle water nozzle 4 and is communicated with the water chute 9.
In this embodiment, the barrel 5 is hollow, so that the blade 6 can be conveniently retracted.
In this embodiment, the blade 6 is mounted on the cylinder 5 through a rotating shaft, and has a symmetrical structure.
The windowing method implemented by the ground immersion process drilling windowing cutting tool comprises the following steps:
after the cement slurry for well cementation is solidified, drilling and cutting can be carried out;
connect the drilling rod with the cutter, transfer the cutting position (the mineral deposit section) of design, open the pump-in water on ground, start the pump circulation, increase the discharge capacity gradually, liquid produces the pressure differential through throttle water injection well choke 4, this pressure differential makes piston 3 overcome 8 resistance downstream of reset spring, promote the outside rotation of blade 6 and get into cutting state, blade 6 opens this moment, begin cutting work, keep pressure unchangeable in the work, until the cutting is accomplished, reduce water pressure, reset spring 8 releases, cutter arbor 7 drives blade 6 and retrieves, promote the drilling rod, carry out the drilling with a whole set of cutter, accomplish the cutting.
The cutter of the embodiment has the advantages that the whole length is 1200mm, and the diameter is 110 mm; the length of the blade 6 is 240mm, the unfolded diameter is 340mm, the PDC alloy material is adopted, and the hardness is 7-8; the diameter of the upper part of the throttling water nozzle 4 is 65mm, and the diameter of the water chute 9 is 20 mm; the length of the cutter bar 7 is 400 mm; the length of the return spring 8 is 80mm, and the diameter is 6 mm.
In actual production, a hole with a diameter of 215mm is drilled, a 152mm plastic casing is installed, and well cementing fluid is filled for well cementing. And (5) carrying out a cutting process after waiting for solidification for 72 hours.
During construction, the upper joint 1 is connected with a drill rod with the diameter of 60mm through a screw thread of NC26, the pump is started along with the drill rod placed at the position where the design starts to cut, the pump pressure reaches 1MPa, the water pressure cannot be relieved in time due to the throttle water nozzle 4, the piston 3 is pushed by the water pressure, the reset spring 8 is compressed, the cutter bar 7 is driven, the blade 6 is separated from the cylinder 5 and is in an open state, and the drilling tool is rotated to start to cut a target layer. Carefully observing the form of the returned slag, when the complete section plastic slag exists, indicating that the plastic pipe is cut through, and when the returned slag appears as sand, and washing liquid is damaged, proving that the cement sheath is cut through, calculating the water level descending speed after the pump is stopped, and judging the communication between the stratum and the well by the difference value of the water level in the hole and the hydrostatic level in the area. If the hydrostatic level in the hole is the same as the hydrostatic level in the hole in the area, the hole is proved to be cut through and communicated with the ore bed, otherwise, the hole is not cut through. The length of record drilling rod, control cutting length when reaching the design position, reduces the pump capacity, and blade 6 is retrieved to barrel 5 in, the drilling can be carried out.
Claims (8)
1. The ground soaks technology drilling windowing cutting tool, its characterized in that: comprises an upper joint, a cylinder sleeve, a piston, a cylinder body, a blade, a cutter bar and a return spring; the upper joint is connected with the upper end of the cylinder sleeve, the piston is installed in the cylinder sleeve, a throttling water nozzle is arranged in the piston, the cutter bar is installed in the cylinder sleeve and the cylinder body, one end of the cutter bar is connected with the piston, the other end of the cutter bar is in movable contact with the blade, a water guide groove is formed in the cutter bar and communicated with the throttling water nozzle, the reset spring is installed outside the cutter bar and connected with the cylinder sleeve and the piston, the cylinder body is connected with the lower end of the cylinder sleeve, and the blade is installed on the cylinder body.
2. The earth leaching process drilling and windowing cutting tool according to claim 1, wherein: one end of the upper joint is provided with an internal thread for connecting a drill rod, the other end of the upper joint is provided with an external thread for connecting a cylinder sleeve, and the inside of the upper joint is of a hole structure and is communicated with the inside of the cylinder sleeve.
3. The earth-leaching process drill-windowing cutting tool according to claim 1 or 2, characterized in that: the cylinder sleeve is cylindrical and has a hollow structure, and the two ends of the cylinder sleeve are provided with internal connecting threads.
4. The earth-leaching process drill-windowing cutting tool according to claim 1 or 2, characterized in that: the piston is cylindrical, the outer diameter of the piston is the same as the inner diameter of the cylinder sleeve, and the piston is in sealing contact with the cylinder sleeve.
5. The earth-leaching process drill-windowing cutting tool according to claim 1 or 2, characterized in that: the throttling water nozzle is conical and arranged in the center of the piston, and a water hole is formed in the center of the throttling water nozzle and communicated with the water guide groove.
6. The earth-leaching process drill-windowing cutting tool according to claim 1 or 2, characterized in that: the barrel is hollow, so that the blade can be conveniently withdrawn.
7. The earth-leaching process drill-windowing cutting tool according to claim 1 or 2, characterized in that: the blade is installed on the barrel through the rotation axis, and is symmetrical structure.
8. A windowing method implemented by using the cutting tool for drilling and windowing according to any one of claims 1 to 7, comprising:
after the cement slurry for well cementation is solidified, drilling and cutting can be carried out;
connect the drilling rod with the cutter, transfer the cutting position of design, open the pump on ground and pump into water, it circulates to open the pump, increase the discharge capacity gradually, liquid produces the pressure differential through the throttle water injection well choke, this pressure differential makes the piston overcome reset spring resistance downstream, promote the outside rotation of blade and get into cutting state, the blade is opened this moment, begin cutting work, keep pressure unchangeable in the work, accomplish until the cutting, reduce water pressure, reset spring release, the cutter arbor drives the blade and retrieves, promote the drilling rod, carry out the drilling with a whole set of cutter, accomplish the cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110839356.4A CN113338803A (en) | 2021-07-23 | 2021-07-23 | Ground immersion process drilling windowing cutting tool and windowing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110839356.4A CN113338803A (en) | 2021-07-23 | 2021-07-23 | Ground immersion process drilling windowing cutting tool and windowing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338803A true CN113338803A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110839356.4A Pending CN113338803A (en) | 2021-07-23 | 2021-07-23 | Ground immersion process drilling windowing cutting tool and windowing method |
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| CN (1) | CN113338803A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846983A (en) * | 2021-10-08 | 2021-12-28 | 核工业二四三大队 | Blade for cutting uranium mining sleeve and reaming mineral-containing aquifer |
| CN114000841A (en) * | 2021-11-02 | 2022-02-01 | 核工业北京化工冶金研究院 | Punching device and punching method |
-
2021
- 2021-07-23 CN CN202110839356.4A patent/CN113338803A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846983A (en) * | 2021-10-08 | 2021-12-28 | 核工业二四三大队 | Blade for cutting uranium mining sleeve and reaming mineral-containing aquifer |
| CN114000841A (en) * | 2021-11-02 | 2022-02-01 | 核工业北京化工冶金研究院 | Punching device and punching method |
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