CN216553884U - Reverse gravel filling device - Google Patents
Reverse gravel filling device Download PDFInfo
- Publication number
- CN216553884U CN216553884U CN202023169377.XU CN202023169377U CN216553884U CN 216553884 U CN216553884 U CN 216553884U CN 202023169377 U CN202023169377 U CN 202023169377U CN 216553884 U CN216553884 U CN 216553884U
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- hollow piston
- reverse
- joint
- valve hole
- gravel
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model belongs to a gravel filling device, in particular 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. This neotype effect that is showing is: 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 utility model belongs to a gravel filling device, in particular 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 the novel ground leaching process, a drill hole which is provided with a well pipe, well cementation and a hole and exposes out an ore layer is firstly constructed, then a smaller built-in filter is arranged in the ore layer in the drill hole, and gravel is reversely filled from the inside of the built-in filter to the outside of the built-in 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 is not developed and is being researched in Xinjiang and inner Mongolia some mineral leaching mountains in China.
SUMMERY OF THE UTILITY MODEL
The novel content is to provide a reverse gravel packing device aiming at the defects of the prior art.
This is novel to realize like this:
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 pack 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.
This neotype effect that is showing is: 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 embodiment of a reverse gravel packing apparatus;
fig. 3 is a general view of a reverse gravel packing apparatus.
Wherein, 1, valve hole sleeve, 2, lower joint, 3, spring, 4, hollow piston, 5, upper joint, 6 gravel filling pipe, 7, drilling hole, 8, reverse gravel filling device, 9, reducing pipe, 10 filler, 11, 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 the hollow piston 4 is not pressurized, the spring 3 pushes the hollow piston 4 to the top dead center, at the moment, the hollow piston 4 blocks three round holes radially and uniformly distributed on the valve hole sleeve 1 (namely, closes the valve hole), when the pressure greater than the elastic force of the spring 3 is applied to the top of the hollow piston 4, the hollow piston moves downwards to the bottom dead center, and at the moment, the three round holes radially and uniformly distributed on the valve hole sleeve 1 are opened (namely, the valve is opened).
When in work: the gravel filling pipe 6 is inserted into the drill hole 7, the lower end head of the gravel filling pipe 6 is inserted into the hollow piston 4 in the reverse gravel filling device 8, the lower end head of the gravel filling pipe 6 is a section of reducing pipe 9 with a large upper part and a small lower part, namely a reducing step, the large diameter of the upper section of the reducing pipe 9 is larger than the diameter of the inner hole of the hollow piston 4, the small diameter of the lower section of the reducing 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 reducing step of the reducing pipe 9, at the moment, the gravel filling pipe 6 applies downward pressure to the hollow piston 4, the pressure of the gravel filling pipe 6 is larger than the elastic force of the spring 3, namely, the hollow piston 4 is pushed to move downwards, and the valve hole on the 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 (7)
1. A reverse gravel pack device is characterized in that: the valve comprises a valve hole sleeve (1), wherein an upper joint and a lower joint are arranged in the valve hole sleeve (1), and a spring (3) is arranged between the two joints;
the device also comprises a hollow piston (4), wherein the hollow piston (4) is arranged between the upper joint (5) and the spring (3);
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.
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 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.
4. A reverse gravel pack apparatus as claimed in claim 3 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.
5. A reverse gravel pack apparatus as claimed in claim 4 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).
6. A reverse gravel pack apparatus as claimed in claim 5 wherein: the upper joint (5) is a hollow cylinder with external threads at two ends.
7. A reverse gravel pack apparatus as claimed in claim 6 wherein: the reverse gravel filling device (8) is arranged at the tail end of the gravel filling pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023169377.XU CN216553884U (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023169377.XU CN216553884U (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216553884U true CN216553884U (en) | 2022-05-17 |
Family
ID=81536475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023169377.XU Active CN216553884U (en) | 2020-12-25 | 2020-12-25 | Reverse gravel filling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216553884U (en) |
-
2020
- 2020-12-25 CN CN202023169377.XU patent/CN216553884U/en active Active
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