CN216406709U - Coring bit for hard and brittle stratum of geothermal drilling - Google Patents
Coring bit for hard and brittle stratum of geothermal drilling Download PDFInfo
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- CN216406709U CN216406709U CN202122884481.5U CN202122884481U CN216406709U CN 216406709 U CN216406709 U CN 216406709U CN 202122884481 U CN202122884481 U CN 202122884481U CN 216406709 U CN216406709 U CN 216406709U
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Abstract
The utility model belongs to the technical field of drill bits and discloses a core drill bit for geothermal drilling of hard and brittle strata. The main technical characteristics are as follows: the inner tube centralizer is arranged on the inner wall of the tube wall of the drill bit matrix; the inner wall of the pipe wall of the diamond matrix is longitudinally provided with an inner water gap, the outer wall of the pipe wall of the diamond matrix is longitudinally provided with an outer water gap, the middle part of the pipe wall of the diamond matrix is longitudinally provided with a bottom center water gap, the bottom surface of the diamond matrix is transversely provided with a groove, and the inner water gap, the outer water gap and the bottom center water gap are respectively communicated with the groove. According to the geothermal drilling hard and brittle stratum coring bit provided by the utility model, the inner pipe of the coring bit is always in the central position in the bit matrix, so that the coring bit cannot shake, the multi-channel passing of flushing fluid is realized, the pressure of the flushing fluid is small, the core washing is small, and the coring effect is good.
Description
Technical Field
The utility model belongs to the technical field of drill bits, and particularly relates to a core drill bit for geothermal drilling of hard and brittle strata.
Background
In order to research the stratum structure characteristics and know the stratum geological condition, a drilling machine is needed to core the stratum, and then the stratum structure characteristics are researched according to the core taken out by the core drilling tool. The integrity of the core is very important to study the structural characteristics of the formation. The coring bit of the existing coring drilling tool comprises a coring drilling tool inner tube and a bit matrix, the lower end of the bit matrix is in an inner convex shape, and the bottom of the bit matrix is provided with a diamond matrix. The inner tube of the core drill of the drill bit is not righted with the inner wall of the drill bit matrix, the inner tube of the core drill is easy to shake, and a core is easy to block the inner tube when a hard and brittle bedrock stratum is drilled. The flushing fluid can only pass through by the clearance between diamond matrix and the coring drilling tool inner tube, and flushing fluid pressure is big, erodes the rock core greatly, influences the coring effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a core bit for geothermal drilling of hard and brittle strata, which ensures that an inner tube of a core drill is stable, flushing fluid passes through multiple channels and reduces the overflowing erosion of the flushing fluid on a rock core.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the inner tube centralizer is characterized by comprising a coring drilling tool inner tube and a drill bit matrix, wherein the lower end of the drill bit matrix is in an inner convex shape, a diamond matrix is arranged at the bottom of the drill bit matrix, and an inner tube centralizer matched with the coring drilling tool inner tube is arranged on the inner wall of the tube wall of the drill bit matrix.
The additional technical characteristics are as follows: the inner pipe centralizer is three, four or more than three evenly arranged on the inner wall of the pipe wall of the drill bit matrix;
an inner water gap is longitudinally arranged on the inner wall of the pipe wall of the diamond matrix, an outer water gap is longitudinally arranged on the outer wall of the pipe wall of the diamond matrix, a bottom central water gap is longitudinally arranged in the middle of the pipe wall of the diamond matrix, the bottom central water gap upwards penetrates through the lower end of the drill bit matrix to a gap between the inner pipe of the core drill and the inner wall of the pipe wall of the drill bit matrix, a groove is transversely arranged on the bottom surface of the diamond matrix, and the inner water gap, the outer water gap and the bottom central water gap are respectively communicated with the groove;
the inner water gap, the outer water gap, the bottom central water gap and the groove are one group or a plurality of groups;
the bottom of the inner wall of the pipe wall of the diamond tire body is a first cambered surface, and the bottom of the outer wall of the pipe wall of the diamond tire body is a second cambered surface;
the diagonal diameter of the bottom of the inner nozzle is larger than the outer diameter of the inner tube of the core drill.
Compared with the prior art, the geothermal drilling hard and brittle stratum coring bit provided by the utility model has the following advantages: first, the inner wall of the pipe wall of the drill bit matrix is provided with an inner pipe centralizer matched with the inner pipe of the core drill. The inner tube centralizer enables the inner tube of the coring drilling tool to be always in the center position inside the drill bit matrix, and the inner tube cannot shake, so that the coring effect is ensured. The inner pipe centralizer is three, four or more than three pipe centralizers uniformly arranged on the inner wall of the pipe wall of the drill bit matrix according to requirements; and secondly, an inner water gap is longitudinally arranged on the inner wall of the pipe wall of the diamond matrix, an outer water gap is longitudinally arranged on the outer wall of the pipe wall of the diamond matrix, a bottom center water gap is longitudinally arranged in the middle of the pipe wall of the diamond matrix, the bottom center water gap upwards penetrates through the lower end of the drill bit matrix to a gap between the inner pipe of the coring drilling tool and the inner wall of the pipe wall of the drill bit matrix, a groove is transversely arranged on the bottom surface of the diamond matrix, the inner water gap, the outer water gap and the bottom center water gap are respectively communicated with the groove, a groove is transversely arranged on the bottom surface of the diamond matrix, and the inner water gap, the outer water gap and the bottom center water gap are respectively communicated with the groove. Interior mouth of a river, outer mouth of a river, end center mouth of a river and recess constitute a chevron shape, and mutual intercommunication, flush fluid can be passed through by clearance, interior mouth of a river, end center mouth of a river multichannel between diamond matrix and the coring drilling tool inner tube to can reach the drill bit matrix outside through the recess through outer mouth of a river, flush fluid pressure is little, erodees for a short time the rock core, improves the coring effect. According to the requirement, the inner water gap, the outer water gap, the bottom central water gap and the groove form one group or a plurality of groups; and thirdly, the bottom of the inner wall of the pipe wall of the diamond tire body is a first cambered surface, and the bottom of the outer wall of the pipe wall of the diamond tire body is a second cambered surface. In a hard, brittle and unstable stratum, the diamond matrix is more stably contacted with the stratum and resists impact; and fourthly, the diagonal diameter of the bottom of the inner nozzle is larger than the outer diameter of the inner pipe of the core drill, so that flushing fluid is reduced from scouring the rock core.
Drawings
FIG. 1 is a schematic structural view of a core bit for geothermal drilling of hard and brittle formations according to the present invention;
FIG. 2 is a schematic view of the external structure of a drill bit matrix and a diamond matrix;
FIG. 3 is a top view of a drill bit matrix, a diamond matrix;
fig. 4 is a bottom view of the bit and diamond matrix.
Detailed Description
The concrete structure of the core bit for geothermal drilling of hard and brittle strata according to the utility model is further explained in detail with the attached drawings.
As shown in fig. 1, 2, 3 and 4, the core bit for geothermal drilling of hard and brittle strata comprises a core bit inner tube 1 and a bit matrix 2, the lower end of the bit matrix 2 is in an inward convex shape, the bottom of the bit matrix 2 is provided with a diamond matrix 3, the inner wall of the tube wall of the bit matrix 2 is provided with an inner tube centralizer 4 matched with the core bit inner tube 1, the inner tube centralizer 4 is four, the inner tube centralizer 4 is uniformly arranged on the inner wall of the tube wall of the bit matrix 2, the inner wall of the tube wall of the diamond matrix 3 is longitudinally provided with an inner water gap 5, the outer wall of the tube wall of the diamond matrix 3 is longitudinally provided with an outer water gap 6, the middle part of the tube wall of the diamond matrix 3 is longitudinally provided with a bottom central water gap 7, the bottom central water gap 7 upwards penetrates through the lower end of the bit matrix 2 to a gap between the core bit inner tube 1 and the inner wall of the bit matrix 2, the bottom of the diamond matrix 3 is transversely provided with a groove 8, the inner water gap 5, the outer water gap 6 and the bottom center water gap 7 are respectively communicated with the groove 8, the inner water gap 5, the outer water gap 6, the bottom center water gap 7 and the groove 8 are in a plurality of groups, the bottom of the inner wall of the pipe wall of the diamond matrix 3 is a first cambered surface 9, the bottom of the outer wall of the pipe wall of the diamond matrix 3 is a second cambered surface 10, and the diagonal diameter of the bottom of the inner water gap 5 is larger than the outer diameter of the inner pipe 1 of the core drill.
The utility model provides a core bit for geothermal drilling of hard and brittle strata, wherein an inner pipe centralizer 4 matched with an inner pipe 1 of a core bit is arranged on the inner wall of the pipe wall of a bit matrix 2. The inner tube centralizer 4 enables the inner tube 1 of the coring drilling tool to be always in the center position inside the drill bit matrix 2, and the coring effect is ensured without shaking. The inner tube centralizer 4 is three, four or more evenly disposed on the inner wall of the tube wall of the bit carcass 2, as required. An inner water gap 5 is longitudinally arranged on the inner wall of the pipe wall of the diamond matrix 3, an outer water gap 6 is longitudinally arranged on the outer wall of the pipe wall of the diamond matrix 3, a bottom center water gap 7 is longitudinally arranged in the middle of the pipe wall of the diamond matrix 3, the bottom center water gap 7 upwards penetrates through the gap between the lower end of the drill bit matrix 2 and the inner wall of the pipe wall of the inner pipe 1 of the core drill and the drill bit matrix 2, a groove 8 is transversely arranged on the bottom surface of the diamond matrix 3, and the inner water gap 5, the outer water gap 6 and the bottom center water gap 7 are respectively communicated with the groove 8. Interior mouth of a river 5, outer mouth of a river 6, end center mouth of a river 7 and recess 8 constitute a chevron shape, and intercommunication each other, the flush fluid can be passed through by clearance between diamond matrix 3 and the coring drilling tool inner tube 1, interior mouth of a river 5, end center mouth of a river 7 multichannel to can reach drill bit matrix 2 outside through outer mouth of a river 6 through recess 8, flush fluid pressure is little, erodees for a short time the rock core, improves the coring effect. According to the requirement, the inner water gap 5, the outer water gap 6, the bottom central water gap 7 and the groove 8 form one group or a plurality of groups. The bottom of the inner wall of the pipe wall of the diamond matrix 3 is a first cambered surface 9, and the bottom of the outer wall of the pipe wall of the diamond matrix 3 is a second cambered surface 10. In a hard, brittle and unstable stratum, the diamond matrix 3 is contacted with the stratum more stably and resists impact. The diagonal diameter of the bottom of the inner nozzle 5 is larger than the outer diameter of the inner tube 1 of the core drill, so that flushing fluid is reduced from washing the core.
The core bit for geothermal drilling hard and brittle strata is not limited to the structure, and any modification, equivalent replacement, improvement and the like on the basis of the utility model are all included in the protection scope of the utility model.
Claims (6)
1. Hard garrulous stratum coring bit of geothermol power probing, including coring drilling tool inner tube, drill bit matrix lower extreme is interior convex, and drill bit matrix bottom is provided with diamond matrix, its characterized in that: and an inner pipe centralizer matched with the inner pipe of the core drill is arranged on the inner wall of the pipe wall of the drill bit matrix.
2. The geothermal drilling hard and brittle formation coring bit of claim 1, wherein: the inner pipe centralizer is three, four or more evenly arranged on the inner wall of the pipe wall of the drill bit matrix.
3. The geothermal drilling hard and brittle formation coring bit of claim 1, wherein: the inner wall of the pipe wall of the diamond matrix is longitudinally provided with an inner water gap, the outer wall of the pipe wall of the diamond matrix is longitudinally provided with an outer water gap, the middle part of the pipe wall of the diamond matrix is longitudinally provided with a bottom center water gap, the bottom center water gap upwards penetrates through the lower end of the drill bit matrix to a gap between the inner pipe of the core drill and the inner wall of the pipe wall of the drill bit matrix, the bottom surface of the diamond matrix is transversely provided with a groove, and the inner water gap, the outer water gap and the bottom center water gap are respectively communicated with the groove.
4. The geothermal drilling hard and brittle formation coring bit of claim 3, wherein: the inner water gap, the outer water gap, the bottom central water gap and the groove are one group or a plurality of groups.
5. The geothermal drilling hard and brittle formation coring bit of claim 3, wherein: the bottom of the inner wall of the pipe wall of the diamond tire body is a first cambered surface, and the bottom of the outer wall of the pipe wall of the diamond tire body is a second cambered surface.
6. The geothermal drilling hard and brittle formation coring bit of claim 3, wherein: the diagonal diameter of the bottom of the inner nozzle is larger than the outer diameter of the inner tube of the core drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122884481.5U CN216406709U (en) | 2021-11-24 | 2021-11-24 | Coring bit for hard and brittle stratum of geothermal drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122884481.5U CN216406709U (en) | 2021-11-24 | 2021-11-24 | Coring bit for hard and brittle stratum of geothermal drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216406709U true CN216406709U (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122884481.5U Active CN216406709U (en) | 2021-11-24 | 2021-11-24 | Coring bit for hard and brittle stratum of geothermal drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216406709U (en) |
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2021
- 2021-11-24 CN CN202122884481.5U patent/CN216406709U/en active Active
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