CN114687711A - Reverse gravel filling device - Google Patents
Reverse gravel filling device Download PDFInfo
- Publication number
- CN114687711A CN114687711A CN202011557441.3A CN202011557441A CN114687711A CN 114687711 A CN114687711 A CN 114687711A CN 202011557441 A CN202011557441 A CN 202011557441A CN 114687711 A CN114687711 A CN 114687711A
- Authority
- CN
- China
- Prior art keywords
- reverse
- hollow piston
- joint
- gravel pack
- reverse gravel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012856 packing Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002791 soaking Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000002386 leaching Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to a gravel filling device, and particularly relates to a reverse gravel filling device. A reverse gravel filling device comprises a valve hole sleeve, an upper joint and a lower joint are arranged in the valve hole sleeve, and an elastic device is arranged between the two joints. The invention has the following remarkable effects: the method solves the problem that gravels are reversely filled from the inside of the built-in filter to the outside of the built-in filter in the process of structurally soaking the built-in filter in a hole with the depth of hundreds of meters.
Description
Technical Field
The invention belongs to a gravel filling device, and particularly relates to a reverse gravel filling device.
Background
At present, the drilling holes of the domestic in-situ leaching uranium mining process are mainly drilled holes of a gravel-filled structure, well pipes of the drilling holes of the structure are connected with a filter into a whole (the inner diameters of the well pipes are the same), gravel filtering layers are filled outside the filter and the well pipes at the upper part and the lower part of the filter, and wells are fixed above a gravel layer. Production and application for many years find that the gravel-packed structure ground leaching process drill hole has the problems of complex construction, poor quality control and more influence on ground leaching mining effect due to the communication of surrounding rocks above and below an ore bed and the drill hole. In Xinjiang and inner Mongolia dip mines in recent years, the research, the popularization and the construction are simple, the drilling of the novel in-built filter structure dip process which is favorable for ensuring the drilling construction quality and plugging the surrounding rocks on and below the ore bed is facilitated, the novel drilling is to construct a drilling hole which is provided with a well pipe, a well and a hole to expose the ore bed in the drilling hole, then a smaller in-built filter is arranged on the ore bed in the drilling hole, and gravel is reversely filled from the inside of the in-built filter to the outside of the in-built filter to form a water filtering layer. The technology of filling gravel from the inside of the built-in filter to the outside of the filter has not been developed and is under study in Xinjiang and inner Mongolia some mineral leaching mountains in China.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a reverse gravel packing device.
The invention is realized by the following steps:
a reverse gravel filling device comprises a valve hole sleeve, an upper joint and a lower joint are arranged in the valve hole sleeve, and an elastic device is arranged between the two joints.
The reverse gravel packing device is characterized in that the upper joint and the lower joint are respectively an upper joint and a lower joint.
A reverse gravel packing apparatus as described above, wherein said resilient means is a spring.
A reverse gravel packing apparatus as described above, further comprising a hollow piston disposed between the upper joint and the spring.
The reverse gravel filling device is characterized in that the hollow piston is a hollow cylinder, the inner part of the hollow piston is a reducing circular hole, the inner diameter of the upper end of the hollow piston is small, and the inner diameter of the lower end of the hollow piston is large.
A reverse gravel packing apparatus as described above, wherein an annular groove is provided on the outer upper side of the hollow piston, and an O-ring is provided in the groove.
The reverse gravel packing device is characterized in that the valve hole sleeve is a pipe hoop with two ends provided with internal threads and 3 round holes radially and uniformly distributed in the middle upper part.
The reverse gravel filling device is characterized in that the lower joint is a hollow cylinder with external threads at two ends, the external threads at the upper part are connected with the internal threads at the lower end of the valve hole sleeve, and the inner hole at the upper end of the lower joint is larger in diameter and is a spring seat of the spring.
The reverse gravel packing device is characterized in that the upper joint is a hollow cylinder with external threads at two ends.
A retrograde gravel packing apparatus as described above, wherein the retrograde gravel packing apparatus is disposed at the distal end of the gravel packing tube.
The invention has the following remarkable effects: the method solves the problem that gravels are reversely filled from the inside of the built-in filter to the outside of the built-in filter in the process of structurally soaking the built-in filter in a hole with the depth of hundreds of meters.
Drawings
FIG. 1 is a diagram of a reverse gravel packing apparatus;
FIG. 2 is a schematic view of an implementation of a reverse gravel packing apparatus;
fig. 3 is a general view of a reverse gravel packing apparatus.
Wherein, 1, a valve hole sleeve, 2, a lower joint, 3, a spring, 4, a hollow piston, 5, an upper joint, 6, a gravel filling pipe, 7, a drill hole, 8, a reverse gravel filling device, 9, a reducing pipe, 10 fillers, 11, a sealing ring
Detailed Description
The valve hole sleeve 1 is a pipe hoop with internal threads at two ends and 3 circular holes radially and uniformly distributed at the middle upper part.
The lower joint 2 is a hollow cylinder with external threads at two ends, the external threads at the upper part are connected with the internal threads at the lower end of the valve hole sleeve 1, and the diameter of an inner hole at the upper end of the lower joint 2 is larger and is a spring seat of the spring 3.
A spring 3 is installed between the lower joint 2 and the hollow piston 4 for applying an upward pushing force to the hollow piston 4.
The hollow piston 4 is a hollow cylinder, the inside of the hollow piston is a reducing circular hole, the inner diameter of the upper end is lower, and the inner diameter of the lower end is larger. An annular groove is arranged on the outer upper position of the hollow piston 4, and an O-shaped sealing ring is arranged in the groove.
The upper joint 5 is a hollow cylinder with external threads at two ends.
When the top of hollow piston 4 does not pressurize, spring 3 pushes away hollow piston 4 to the top dead center, and hollow piston 4 is fallen the shutoff of three round hole of radial equipartition on the valve hole cover 1 (closes the valve opening promptly) this moment, when applying the pressure that is greater than spring 3 elasticity for the top of hollow piston 4, hollow piston will downstream to the bottom dead center, and the three round hole of radial equipartition is opened (opens the valve promptly) on the valve hole cover 1 this moment.
When in work: a gravel filling pipe 6 is inserted into a drill hole 7, the lower end head of the gravel filling pipe 6 is inserted into a hollow piston 4 in a reverse gravel filling device 8, the lower end head of the gravel filling pipe 6 is a variable diameter pipe 9 with a large upper part and a small lower part, namely, a variable diameter step is arranged, the large diameter of the upper section of the variable diameter pipe 9 is larger than the diameter of an inner hole of the hollow piston 4, the small diameter of the lower section of the variable diameter pipe 9 is smaller than the diameter of the inner hole of the hollow piston 4, when the lower end of the gravel filling pipe 6 is placed at the position of the hollow piston 4, the gravel filling pipe 6 is blocked by the hollow piston 4 at the variable diameter step of the variable diameter pipe 9, at the moment, downward pressure is applied to the hollow piston 4 by the gravel filling pipe 6, the pressure of the gravel filling pipe 6 is larger than the elastic force of a spring 3, namely, the hollow piston 4 is pushed to move downwards, and a valve hole on a valve hole sleeve 1 is opened. At this time, the mixture of gravel and water is sent into the gravel packing pipe 6 by the high-pressure pump 7, and the mixture of gravel and water flows out radially from the water hole on the side of the variable diameter pipe 9 at the lower end of the gravel packing pipe 6 through the variable diameter pipe 9 running down from the gravel packing pipe 6 to the lower end of the gravel packing pipe 6, and then flows radially into the annulus outside the apparatus inside the head from the water hole of the valve hole sleeve 1. Thereby realizing the purpose of filling gravel into the annular cavity outside the filter pipe.
Claims (10)
1. A reverse gravel pack device is characterized in that: the valve comprises a valve hole sleeve (1), an upper joint and a lower joint are arranged in the valve hole sleeve (1), and an elastic device is arranged between the two joints.
2. A reverse gravel pack apparatus as claimed in claim 1 wherein: the upper joint and the lower joint are respectively an upper joint (5) and a lower joint (2).
3. A reverse gravel pack apparatus as claimed in claim 2 wherein: the elastic device is a spring (3).
4. A reverse gravel packing apparatus as claimed in claim 3 wherein: the device also comprises a hollow piston (4), and the hollow piston (4) is arranged between the upper joint (5) and the spring (3).
5. A reverse gravel pack apparatus as claimed in claim 4 wherein: the hollow piston (4) is a hollow cylinder, the inside of the hollow piston is a reducing round hole, the inner diameter of the upper end of the hollow piston is small, and the inner diameter of the lower end of the hollow piston is large.
6. A reverse gravel pack apparatus as claimed in claim 5 wherein: an annular groove is arranged on the outer upper position of the hollow piston (4), and an O-shaped sealing ring is arranged in the groove.
7. A reverse gravel pack apparatus as claimed in claim 6 wherein: the valve hole sleeve (1) is a pipe hoop with internal threads at two ends and 3 circular holes radially and uniformly distributed at the middle upper part.
8. A reverse gravel pack apparatus as claimed in claim 7 wherein: the lower joint (2) is a hollow cylinder with external threads at two ends, the external threads at the upper part are connected with the internal threads at the lower end of the valve hole sleeve (1), and the diameter of an inner hole at the upper end of the lower joint (2) is larger and is a spring seat of the spring (3).
9. A reverse gravel pack apparatus as claimed in claim 8 wherein: the upper joint (5) is a hollow cylinder with external threads at two ends.
10. A reverse gravel pack apparatus as claimed in claim 9 wherein: the reverse gravel packing device (8) is arranged at the tail end of the gravel packing pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557441.3A CN114687711A (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557441.3A CN114687711A (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114687711A true CN114687711A (en) | 2022-07-01 |
Family
ID=82130140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011557441.3A Pending CN114687711A (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114687711A (en) |
-
2020
- 2020-12-25 CN CN202011557441.3A patent/CN114687711A/en active Pending
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