CN216277703U - Geothermal drilling third series stratum coring bit - Google Patents
Geothermal drilling third series stratum coring bit Download PDFInfo
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- CN216277703U CN216277703U CN202122953999.XU CN202122953999U CN216277703U CN 216277703 U CN216277703 U CN 216277703U CN 202122953999 U CN202122953999 U CN 202122953999U CN 216277703 U CN216277703 U CN 216277703U
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Abstract
The utility model belongs to the technical field of coring bits, and discloses a geothermal drilling third series stratum coring bit. The main technical characteristics are as follows: the core drill comprises an inner tube of a core drill and a drill bit matrix, wherein the front end of the drill bit matrix is provided with a drill bit fin with a cutting tool, the inner wall of the tube wall at the rear end of the drill bit matrix is provided with a drill bit screw thread, and the inner wall of the tube wall of the drill bit matrix is provided with an inner tube centralizer; the inner wall of the pipe wall of the drill bit matrix is longitudinally provided with an inner water gap, and the middle part of the pipe wall of the drill bit matrix is longitudinally provided with a bottom water gap. According to the geothermal drilling third series stratum coring bit provided by the utility model, the inner pipe of the coring bit can be always positioned in the center of the inner part of the bit matrix, 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 coring bits, and particularly relates to a coring bit for a third series stratum of geothermal drilling.
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 drilling coring bit for the third series stratum comprises a coring drill inner tube and a bit matrix, wherein a bit wing piece with a cutting tool is arranged at the front end of the bit matrix, and a bit screw thread is arranged on the inner wall of the tube wall at the rear end of the bit 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 during drilling. The flushing fluid can only pass through the gap between the inner pipe of the core drill and the inner wall of the pipe wall of the drill bit matrix, the pressure of the flushing fluid is large, the core is greatly scoured, the core-taking effect is influenced, and the drill bit fin can deform or even fall off when the drilling is carried out in uneven strata.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a geothermal drilling third series stratum coring bit which ensures that an inner tube of a coring drilling tool is stable and flushing fluid passes through multiple channels.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the drill bit comprises a drill bit matrix, wherein a drill bit wing piece with a cutting tool is arranged at the front end of the drill bit matrix, a drill bit screw thread is arranged on the inner wall of the pipe wall at the rear end of the drill bit matrix, and an inner pipe centralizer is arranged on the inner wall of the pipe 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 drill bit matrix, and a bottom water gap is longitudinally arranged in the middle of the pipe wall of the drill bit matrix;
the cross section of the bottom water gap is arc-shaped strip-shaped;
and a wing panel reinforcing block is arranged behind the wing panel of the drill bit.
Compared with the prior art, the geothermal drilling third series 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. 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 the inner wall of the pipe wall of the drill bit matrix is longitudinally provided with an inner water gap, and the middle part of the pipe wall of the drill bit matrix is longitudinally provided with a bottom water gap. The flushing fluid can be passed through by clearance, interior mouth of a river, end mouth of a river multichannel between the inner wall of the pipe wall of coring drilling tool inner tube and drill bit matrix, and flushing fluid pressure is little, erodees the rock core for a short time, improves the effect of coring. The cross section of the bottom nozzle is an arc-shaped strip, so that the passing rate of flushing liquid can be increased; thirdly, the back of the drill bit wing is provided with a wing reinforcing block, the strength of the drill bit wing is enhanced, the drill bit wing cannot deform or even fall off when the drill bit wing drills into an uneven stratum, and the coring effect is improved.
Drawings
FIG. 1 is a schematic view of a third family of earth coring bits for geothermal drilling according to the present invention;
FIG. 2 is a schematic view of the outer structure of the bit carcass;
FIG. 3 is a schematic structural view of the leading end of the bit carcass.
Detailed Description
The structure of the third family of earth boring coring bits of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the geothermal drilling third series stratum coring bit of the utility model comprises a coring drill inner tube 1 and a bit matrix 2, wherein the front end of the bit matrix 2 is provided with a bit fin 4 with a cutter 3, the inner wall of the tube wall at the rear end of the bit matrix 2 is provided with a bit screw thread 5, the inner wall of the tube wall of the bit matrix 2 is provided with an inner tube centralizer 6 matched with the coring drill inner tube 1, the inner wall of the tube wall of the bit matrix 2 is longitudinally provided with an inner water gap 7, the middle part of the tube wall of the bit matrix 2 is longitudinally provided with a bottom water gap 8, the cross section of the bottom water gap 8 is a circular arc strip, and a fin reinforcing block 9 is arranged behind the bit fin 4.
The inner wall of the pipe wall of the drill bit matrix 2 is provided with an inner pipe centralizer 6. The inner tube centralizer 6 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 6 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 7 is longitudinally arranged on the inner wall of the pipe wall of the drill bit matrix 2, and a bottom water gap 8 is longitudinally arranged in the middle of the pipe wall of the drill bit matrix 2. The flushing fluid can be passed through by clearance, interior mouth of a river 7, end mouth of a river 8 multichannel between the inner wall of the pipe wall of coring drilling tool inner tube 1 and drill bit matrix 2, and flushing fluid pressure is little, erodees the rock core for a short time, improves the effect of coring. The cross section of the bottom nozzle 8 is a circular arc-shaped strip, so that the passing rate of flushing liquid can be increased. The fin reinforcing block 9 is arranged behind the drill bit fin 4 to reinforce the strength of the drill bit fin 4, so that the drill bit fin 4 cannot deform or even fall off when drilling in uneven stratums, and the coring effect is improved.
The third series earth layer coring bit for geothermal drilling provided by the utility model is not limited to the structure, and any modification, equivalent replacement, improvement and the like made on the basis of the utility model are all included in the protection scope of the utility model.
Claims (5)
1. Geothermal drilling third series stratum coring bit, including the drill bit matrix, the front end of drill bit matrix is provided with the drill bit fin that has the cutting utensil, and the inner wall of the pipe wall of the rear end of drill bit matrix is provided with drill bit screw thread, its characterized in that: and an inner pipe centralizer is arranged on the inner wall of the pipe wall of the drill bit matrix.
2. The geothermal drilling third series of 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 third series of formation coring bit of claim 1, wherein: the inner wall of the pipe wall of the drill bit matrix is longitudinally provided with an inner water gap, and the middle part of the pipe wall of the drill bit matrix is longitudinally provided with a bottom water gap.
4. The geothermal drilling third series of formation coring bit of claim 3, wherein: the cross section of the bottom nozzle is arc-shaped strip.
5. The geothermal drilling third series of formation coring bit of claim 1, wherein: and a wing panel reinforcing block is arranged behind the wing panel of the drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122953999.XU CN216277703U (en) | 2021-11-29 | 2021-11-29 | Geothermal drilling third series stratum coring bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122953999.XU CN216277703U (en) | 2021-11-29 | 2021-11-29 | Geothermal drilling third series stratum coring bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216277703U true CN216277703U (en) | 2022-04-12 |
Family
ID=81038993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122953999.XU Active CN216277703U (en) | 2021-11-29 | 2021-11-29 | Geothermal drilling third series stratum coring bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216277703U (en) |
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2021
- 2021-11-29 CN CN202122953999.XU patent/CN216277703U/en active Active
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