CN219932092U - Drilling bit for soft stratum - Google Patents
Drilling bit for soft stratum Download PDFInfo
- Publication number
- CN219932092U CN219932092U CN202321567580.3U CN202321567580U CN219932092U CN 219932092 U CN219932092 U CN 219932092U CN 202321567580 U CN202321567580 U CN 202321567580U CN 219932092 U CN219932092 U CN 219932092U
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- CN
- China
- Prior art keywords
- mounting seat
- drill bit
- pressing sheet
- rod
- wall
- Prior art date
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Links
- 238000005553 drilling Methods 0.000 title description 13
- 238000003825 pressing Methods 0.000 claims abstract description 45
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000005755 formation reaction Methods 0.000 claims description 9
- 239000002689 soil Substances 0.000 abstract description 12
- 238000003756 stirring Methods 0.000 abstract description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a drill bit for soft stratum, which comprises the following components: the side wall of the rod body is provided with a spiral blade, and the bottom of the side wall of the rod body is provided with a positioning notch and a first mounting seat; the drill bit body is fixedly arranged at the bottom of the rod body, and the width of the drill bit body is larger than that of the rod body; the extrusion device is arranged above the drill bit body and comprises a pressing sheet and a connecting assembly, wherein the pressing sheet is in arc-shaped and vertical arrangement, one side of the pressing sheet is in interval arrangement with the rod body, the other side of the pressing sheet is in butt joint with the inner wall of the positioning notch, and the connecting assembly is arranged between one side of the pressing sheet and the first mounting seat. According to the structure, the connecting assembly can support and position one side of the pressing sheet, the drill bit can stir the soil of the stratum structure during rotation, a part of the soil is conveyed upwards through the spiral blades, and the other part of the soil can be extruded to the inner wall of the hole through the pressing sheet, so that the structural strength of the inner wall of the hole is improved, the shape of the hole is well maintained and supported, and the hole is prevented from collapsing.
Description
Technical Field
The utility model relates to the technical field of drilling equipment, in particular to a drilling bit.
Background
During geological exploration and other works, various geological formations need to be drilled so as to analyze the state distribution of the formations and sample and analyze. At present, geological strata are more in variety, characteristics of the geological strata are different, and different drill bits and drilling methods are needed according to different geological strata. For example, for shallow stratum structures mainly composed of soft soil layers, silt and the like, the shallow stratum structures are softer, the drilling resistance of the drill bit is smaller, and the holes are drilled in a mode of not adding water for dry drilling (the geological structures have smaller temperature rise of the drill bit under the condition of not adding water for dry drilling, and if water is added into the holes to form slurry, the hole walls are greatly wetted and collapsed). In addition, after the stratum structure drills holes, the drill bit needs to be lifted in time and is put into the pipe barrel to be supported so as to avoid collapse, and the drill bit is continuously put into the pipe barrel to be constructed.
In practical application, it is found that many drill bits directly drill and crush stratum structures and form holes in a mode of transporting mud scraps, and for the stratum structures, the hole walls of the holes are softer, or only very thin mud coats are adhered, the structural strength of the hole walls is lower, and the hole walls of the structures can cause collapse before the holes are put into a pipe barrel. Therefore, improvements are needed to strengthen the structural strength of the cell walls.
Disclosure of Invention
The utility model aims to provide a drilling bit for a soft stratum, which can solve the problem of lower structural strength of a hole wall.
To achieve the above object, there is provided a drill bit for a soft formation, comprising: the side wall of the rod body is provided with a helical blade, and the bottom of the side wall of the rod body is provided with a positioning notch and a first mounting seat; the drill bit body is fixedly arranged at the bottom of the rod body, and the width of the drill bit body is larger than that of the rod body; the extrusion device is arranged above the drill bit body and comprises a pressing sheet and a connecting assembly, wherein the pressing sheet is in arc-shaped and vertical arrangement, one side of the pressing sheet is arranged at intervals with the rod body, the other side of the pressing sheet is abutted against the inner wall of the positioning notch, and the connecting assembly is arranged between one side of the pressing sheet and the first mounting seat.
According to the drilling bit for the soft stratum, the connecting assembly comprises a second mounting seat, a connecting rod and a double-headed screw rod, the second mounting seat is arranged on the inner side of the pressing sheet and is oppositely arranged with the first mounting seat, a first threaded hole is formed in one side surface, opposite to the first mounting seat, of the second mounting seat, the connecting rod is arranged on the second mounting seat and is inserted into the first mounting seat, and the double-headed screw rod is matched with and inserted into the first threaded hole of the first mounting seat and the first threaded hole of the second mounting seat respectively.
According to the drilling bit for the soft stratum, the connecting assembly comprises a second mounting seat, a connecting rod and a connecting bolt, the second mounting seat is arranged on the inner side of the pressing sheet and is opposite to the first mounting seat, a first threaded hole is formed in the first mounting seat towards one side face of the second mounting seat, the connecting rod is arranged on the second mounting seat and is inserted into the first mounting seat, the side wall of the connecting rod is provided with a connecting table, and the connecting bolt penetrates through the connecting table and is matched with the first threaded hole in the first mounting seat.
According to the drill bit for soft stratum, the number of the extrusion devices is two, the extrusion devices are symmetrically arranged on the axis of the rod body, and the bottoms of the spiral blades extend to the position between the two extrusion devices.
According to the drilling bit for the soft stratum, the second threaded hole is formed in the inner wall of the positioning notch, the threaded fastener is arranged on the other side of the pressing piece in a penetrating mode, and the threaded fastener is matched and inserted into the second threaded hole.
According to the drilling bit for soft stratum, the bottom of the bit body is provided with the guiding drill rod.
According to the drill bit for soft stratum, the side wall of the bit body is provided with the groove, the groove extends downwards to the bottom surface of the bit body, and the cutter body is embedded in the groove.
The beneficial effects are that: according to the structure, the connecting assembly can support and position one side of the pressing sheet, the drill bit can stir the soil of the stratum structure during rotation, a part of the soil is conveyed upwards through the spiral blades, and the other part of the soil can be extruded to the inner wall of the hole through the pressing sheet, so that the structural strength of the inner wall of the hole is improved, the shape of the hole is well maintained and supported, and the hole is prevented from collapsing.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a front view of the present utility model;
FIG. 2 is a cross-sectional view A-A of the rod body and the pressing device of FIG. 1;
FIG. 3 is a cross-sectional view of another embodiment of a rod body and extrusion device;
fig. 4 is a cross-sectional view of a further embodiment of the rod body and the compression device.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements 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 utility model.
In the description of the present utility model, greater than, less than, exceeding, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1-4, a drill bit for use in soft formations comprises a shank 10, a bit body 20, and an extrusion device 30. The side wall of the rod body 10 is provided with a helical blade 11, and the bottom of the side wall of the rod body 10 is provided with a positioning notch 12 and a first mounting seat 13. The drill bit body 20 is fixedly arranged at the bottom of the rod body 10, and the width of the drill bit body 20 is larger than that of the rod body 10. The extrusion device 30 is arranged above the drill bit body 20 and comprises a pressing sheet 31 and a connecting component 32, the pressing sheet 31 is in arc-shaped and vertical arrangement, one side of the pressing sheet 31 is arranged at intervals with the rod body 10, the other side of the pressing sheet is abutted against the inner wall of the positioning notch 12, and the connecting component 32 is arranged between one side of the pressing sheet 31 and the first mounting seat 13.
As described above, the connecting component 32 can support and position one side of the pressing piece 31, the drill bit can stir up the soil of the stratum structure when rotating, a part of the soil is conveyed upwards through the helical blade 11, and a part of the soil can be extruded to the inner wall of the hole through the pressing piece 31, so that the structural strength of the inner wall of the hole is increased, the shape of the hole is well maintained and supported, and the hole is prevented from collapsing.
Specifically, in an embodiment, the connecting assembly 32 includes a second mounting seat 321, a connecting rod 322 and a double-end screw 323, the second mounting seat 321 is disposed on the inner side of the pressing sheet 31 and is opposite to the first mounting seat 13, a first threaded hole is formed in a side surface of the first mounting seat 13 opposite to the second mounting seat 321, the connecting rod 322 is disposed on the second mounting seat 321 and is inserted into the first mounting seat 13, and the double-end screw 323 is respectively matched with and inserted into the first threaded hole of the first mounting seat 13 and the first threaded hole of the second mounting seat 321. Wherein, two double-ended screws 323 are correspondingly arranged in each connecting component 32, and the two double-ended screws 323 are arranged in parallel. Through the structure, one side of the pressing piece 31 can be positioned, and the double-headed screw 323 can be prevented from receiving larger shearing force by inserting the connecting rod 322 into the first mounting seat 13. In some cases, due to the existence of machining errors, when the other side of the pressing piece 31 abuts against the inner wall of the positioning notch 12 for different pressing pieces 31, the distances between one side of the pressing piece 31 and the first mounting seat 13 are inconsistent, and the machining errors can be compensated by arranging the double-ended screw 323.
In other embodiments, the connecting assembly 32 includes a second mounting seat 321, a connecting rod 322 and a connecting bolt 324, the second mounting seat 321 is disposed on the inner side of the pressing sheet 31 and is opposite to the first mounting seat 13, a first threaded hole is formed in a side surface of the first mounting seat 13 facing the second mounting seat 321, the connecting rod 322 is disposed on the second mounting seat 321 and is inserted into the first mounting seat 13, a connecting table 3221 is disposed on a side wall of the connecting rod 322, and the connecting bolt 324 passes through the connecting table 3221 and is matched with the first threaded hole inserted into the first mounting seat 13. The above structure also positions one side of the pressing piece 31. When the machining error is present, a spacer may be provided between the connection stage 3221 and the first mount 13, and the connection bolt 324 may be inserted into the spacer.
The number of the pressing devices 30 is two, and the pressing devices are symmetrically arranged along the axis of the rod body 10 so as to balance the stress of the drill bit. The bottom of the helical blade 11 extends between the two pressing devices 30 so as to convey the soil between the two pressing devices 30 upward.
In some embodiments, a second threaded hole is formed in the inner wall of the positioning notch 12, and a threaded fastener 33 is penetrated at the other side of the pressing piece 31, and the threaded fastener 33 is cooperatively inserted into the second threaded hole to limit the displacement of the other side of the pressing piece 31.
In some embodiments, the bottom of the drill bit body 20 is provided with a guiding rod 40, and guiding limitation can be performed by arranging the guiding rod 40, so that the lateral deviation of the drill bit is avoided.
The side wall of the drill bit body 20 is provided with grooves which extend downwards to the bottom surface of the drill bit body 20, each groove is embedded with a cutter body 21, and the soil of the stratum structure is crushed through the rotation of the cutter bodies 21.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (7)
1. A drill bit for use in a soft earth formation, comprising:
the side wall of the rod body is provided with a helical blade, and the bottom of the side wall of the rod body is provided with a positioning notch and a first mounting seat;
the drill bit body is fixedly arranged at the bottom of the rod body, and the width of the drill bit body is larger than that of the rod body;
the extrusion device is arranged above the drill bit body and comprises a pressing sheet and a connecting assembly, wherein the pressing sheet is in arc-shaped and vertical arrangement, one side of the pressing sheet is arranged at intervals with the rod body, the other side of the pressing sheet is abutted against the inner wall of the positioning notch, and the connecting assembly is arranged between one side of the pressing sheet and the first mounting seat.
2. The drill bit for soft strata according to claim 1, wherein the connecting assembly comprises a second mounting seat, a connecting rod and a double-headed screw rod, the second mounting seat is arranged on the inner side of the pressing sheet and is opposite to the first mounting seat, first threaded holes are formed in opposite side surfaces of the first mounting seat and the second mounting seat, the connecting rod is arranged on the second mounting seat and is inserted into the first mounting seat, and the double-headed screw rod is respectively matched with and inserted into the first threaded holes of the first mounting seat and the first threaded holes of the second mounting seat.
3. The drill bit for soft strata according to claim 1, wherein the connecting assembly comprises a second mounting seat, a connecting rod and a connecting bolt, the second mounting seat is arranged on the inner side of the pressing sheet and is opposite to the first mounting seat, a first threaded hole is formed in one side face of the first mounting seat, which faces the second mounting seat, the connecting rod is arranged on the second mounting seat and is inserted into the first mounting seat, the side wall of the connecting rod is provided with a connecting table, and the connecting bolt penetrates through the connecting table and is matched with the first threaded hole which is inserted into the first mounting seat.
4. A drill bit for use in a soft earth formation according to claim 1, 2 or 3, wherein the number of said extrusion means is two and symmetrically arranged about the axis of the shank, the base of said helical blades extending between the extrusion means.
5. A drill bit for use in soft formations according to claim 2 or claim 3, wherein the inner wall of the locating recess is provided with a second threaded bore, and the other side of the preform is provided with a threaded fastener which is co-operatively inserted into the second threaded bore.
6. A drill bit for use in soft earth formations as claimed in claim 4, wherein the bottom of the bit body is provided with a pilot drill stem.
7. A drill bit for use in soft earth formations as claimed in claim 1, wherein the side wall of the bit body has a recess extending downwardly to the bottom surface of the bit body, the recess having a cutter body embedded therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321567580.3U CN219932092U (en) | 2023-06-19 | 2023-06-19 | Drilling bit for soft stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321567580.3U CN219932092U (en) | 2023-06-19 | 2023-06-19 | Drilling bit for soft stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219932092U true CN219932092U (en) | 2023-10-31 |
Family
ID=88496593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321567580.3U Active CN219932092U (en) | 2023-06-19 | 2023-06-19 | Drilling bit for soft stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219932092U (en) |
-
2023
- 2023-06-19 CN CN202321567580.3U patent/CN219932092U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |