CN203285340U - With-pressure drying drill coring bit - Google Patents
With-pressure drying drill coring bit Download PDFInfo
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- CN203285340U CN203285340U CN2013201483984U CN201320148398U CN203285340U CN 203285340 U CN203285340 U CN 203285340U CN 2013201483984 U CN2013201483984 U CN 2013201483984U CN 201320148398 U CN201320148398 U CN 201320148398U CN 203285340 U CN203285340 U CN 203285340U
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- drill bit
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Abstract
A with-pressure drying drill coring bit comprises a bit column, pistons and a spring. The spring is embedded into the bit. The upper end of the spring is in contact with the inner surface of the bit. The lower end of the spring is connected with the pistons. The bit comprises a liquid injection opening and a liquid discharging opening. The number of the pistons is at least two. The piston A and the spring form a pressure limiting device. Certain pressure is guaranteed in a hydraulic cavity through the pressure limiting device. The pressure is exerted on the piston B and then is transmitted to a rock core. According to the with-pressure drying drill coring bit, damage on the rock core can be avoided, coring success rate is high, and the with-pressure drying drill coring bit has significance in site investigation and laboratory investigation data extraction.
Description
Technical field
The utility model relates to a kind of geotechnical engineering rock sample core bit, particularly a kind of drilled dry core bit with pressure.
Background technology
in geotechnical engineering and petroleum works, mechanical properties of rock is the most basic data of engineering design, often to obtain by a large amount of Experiments of Machanics the mechanics parameter of engineering rock, and drilling through of rock sample is the first step of whole process, it is also the first step that affects experimental data validity, draw thus a problem: the process of coring necessarily comprises damage, these damages have a certain impact to the later stage parameter measurement, hard or high strength rocks for some, this impact can be ignored and not remember, and for cementing a little less than some, stratiform or fissured rock, the success rate of coring is extremely low, even if obtain complete rock core, the impact of damage is also very remarkable to the change of rock property.
The utility model content
The utility model namely for above-mentioned defect, provides a kind of solution process of coring to discharge because of axial compression and rock core cylinder wall causes with the drill bit wall friction drilled dry core bit with pressure that rock core damages.
To achieve these goals, first aspect of the present utility model provides a kind of drilled dry core bit with pressure.
Drilled dry core bit with pressure according to the utility model first aspect comprises drill bit post, piston, spring, its medi-spring inlay bur headpin is inner, the spring upper end contacts with drill bit post inner surface, and the spring lower end is connected with piston, comprises liquid injection port and leakage fluid dram on the drill bit post.
Preferably, the quantity of described piston is at least two.
Preferably, the piston of described drilled dry core bit with pressure comprises piston A and piston B.
Preferably, described drilled dry core bit with pressure also comprises swivel joint.
Preferably, the top of described piston A is connected with spring.
Preferably, described piston B lower end is connected with described swivel joint.
Preferably, form hydraulic cavities between described piston A and described piston B.
Preferably, the side of described piston B coordinates with drill bit post inner surface.
Preferably, the fit system of the side of described piston B and drill bit post inner surface is matched in clearance.
Preferably, the fit system of the side of described piston B and drill bit post inner surface is interference fits.
Preferably, described piston A and spring form pressure limiting device, and described pressure limiting device makes in hydraulic cavities and meets certain pressure, and this pressure is applied on piston B, then this pressure is passed to rock core.
Preferably, the material of described drill bit post is the 45# steel.
Preferably, the material of described drill bit post is alloy steel.
Preferably, be provided with graduation mark on drill bit column outer wall face.
Preferably, described drill bit post bottom is connected with drill bit.
Preferably, described drill bit comprises bit teeth.
Preferably, described swivel joint comprises rotating part and non-rotating part.
Preferably, the rotating part of described swivel joint contacts with piston B.
Preferably, the non-rotating part of described swivel joint contacts with rock core.
Preferably, the material of described piston A is the 45# steel.
Preferably, the material of described piston B is the 45# steel.
Preferably, the material of described spring is alloy spring wire.
Preferably, the material of described spring is 60Si
2Mn.
The working method of the drilled dry core bit with pressure of the utility model first aspect is: liquid is injected hydraulic cavities from liquid injection port, make in hydraulic cavities and fill with liquid, then close liquid injection port, promote swivel joint at hydraulic action lower piston B and contact with rock; Promote drill bit to pressing down, and the rotary cutting rock, this moment, in drill bit, the internal pressure of hydraulic cavities raise along with the drill bit post presses down, and simultaneously, the interior pressure pushing piston A of hydraulic cavities moves up, and spring hinders the movement of piston A; When the pressure in hydraulic cavities reached predetermined value, piston A moved up and Compress Spring under hydraulic action, and the deflection of spring surpasses certain limit, and the lower end of piston A is retracted into leakage fluid dram when above, and the interior liquid of hydraulic cavities is discharged from leakage fluid dram; At this moment, pressure drop in hydraulic cavities, the suffered liquid internal pressure in piston A lower end reduces, under the pressure differential effect of spring force and liquid internal pressure, piston A moves downward, thereby makes the liquid internal pressure in hydraulic cavities return to certain value, and impels piston B to promote swivel joint and push down rock core, after this, continue to promote drill bit to pressing down and the rotary cutting rock.
Drill bit presses down in process, and the interior pressure of hydraulic cavities raises again in drill bit, and pushing piston A moves up and higher than leakage fluid dram, liquid in hydraulic cavities is discharged, drops in hydraulic cavities, piston A moves downward, and hydraulic cavities is sealed and is guaranteed that certain pressure impels piston B to promote swivel joint and contacts with rock core.
Drilled dry core bit with pressure such as above-mentioned process iterative cycles, constantly promote the drill bit post to pressing down, and the rotary cutting rock core, after having cored, can pass through the liquid injection port filling liquid at every turn, is sealing state during hydraulic cavities work.
The drilled dry core bit with pressure that the utility model first aspect provides can be avoided the infringement to rock core, and the success rate of coring is high, for the extraction of on-site land survey and laboratory research data, all has very strong necessity.
The technical scheme of the drilled dry core bit with pressure that the utility model first aspect provides comprises any combination of each part mentioned above, and the simple change of each part mentioned above assembly or combination are still protection domain of the present utility model.
Second aspect of the present utility model also provides a kind of drilled dry coring method with pressure, and it comprises the steps:
A. fill with liquid by liquid injection port in drill bit post hydraulic cavities;
B. liquid injection port is sealed;
C. pushing piston B makes it to contact with swivel joint;
D. promoting swivel joint contacts with rock;
E. depress drill bit towards the rock matrix direction;
F. the rotary drill bit post cuts rock;
G. drill bit stops cutting, removal of core after piercing the default degree of depth.
Preferably, above step is carried out successively.
Preferably, the drilled dry core bit with pressure that provides for the utility model first aspect of described drill bit.
Preferably, described drilled dry core bit with pressure comprises piston A and piston B.
Preferably, the top of described piston A is connected with spring.
Preferably, described piston B lower end is connected with described swivel joint.
Preferably, the side of described piston B coordinates with drill bit post inner surface.
Preferably, be provided with graduation mark on drill bit column outer wall face.
More multioperation is all known for those of ordinary skills, repeats no more.
The technical scheme of the drilled dry coring method with pressure that the utility model second aspect provides comprises any combination of each part mentioned above, and the simple change of each part mentioned above assembly or combination are still protection domain of the present utility model.
Description of drawings
Fig. 1 is the structural representation according to a preferred embodiment of the drilled dry core bit with pressure of the utility model first aspect;
Fig. 2 is the process of coring schematic diagram embodiment illustrated in fig. 1.
In Fig. 1, Fig. 2, numeral represents respectively:
1 spring 2 piston A
3 leakage fluid dram 4 liquid injection port
5 hydraulic cavities 6 drill bit posts
7 piston B 8 swivel joints
9 rock core 10 rock mass
The specific embodiment
In order to understand better the utility model, below in conjunction with the preferred embodiment of accompanying drawing detailed description according to the structure of the drilled dry core bit with pressure of the utility model first aspect.
Fig. 1 is the structural representation according to a preferred embodiment of the drilled dry core bit with pressure of the utility model first aspect, in the present embodiment, drilled dry core bit with pressure comprises drill bit post 6, piston A2, piston B7, spring 1, its medi-spring 1 inlay bur headpin 6 inside, spring 1 upper end contacts with drill bit post 6 inner surfaces, and spring 1 lower end is connected with piston A2, comprises liquid injection port 4 and leakage fluid dram 3 on drill bit post 6, piston B7 lower end is connected with swivel joint 8, forms hydraulic cavities 5 between piston A2 and piston B7.
In the present embodiment, the side of described piston B7 coordinates with the inner surface of drill bit post 6.
In the present embodiment, the fit system of the side of described piston B7 and drill bit post 6 inner surfaces is matched in clearance.
In the present embodiment, the fit system of the side of described piston B7 and drill bit post 6 inner surfaces is interference fits.
In the present embodiment, described piston A2 and spring 1 forms pressure limiting device, and described pressure limiting device makes that hydraulic cavities 5 is interior meets certain pressure, and this pressure is applied on piston B7, then this pressure is passed to rock core 9.
In the present embodiment, the material of described drill bit post 6 is the 45# steel.
In the present embodiment, the material of described drill bit post 6 is alloy steel.
In the present embodiment, the material of described piston A2 is the 45# steel.
In the present embodiment, the material of described piston B7 is the 45# steel.
In the present embodiment, the material of described spring 1 is alloy spring wire.
In the present embodiment, described swivel joint comprises rotating part and non-rotating part.
In the present embodiment, the rotating part of described swivel joint contacts with piston B.
In the present embodiment, the non-rotating part of described swivel joint contacts with rock core.
In the present embodiment, the working method of drilled dry core bit with pressure is: liquid is injected hydraulic cavities 5 from liquid injection port 4, make in hydraulic cavities 5 and fill with liquid, then close liquid injection port 4, promote swivel joint 8 at hydraulic action lower piston B7 and contact with rock mass 10; Promote drill bit post 6 to pressing down, and the rotary cutting rock, this moment, the internal pressure of the interior hydraulic cavities 5 of drill bit post 6 raise along with drill bit post 6 presses down, and simultaneously, the interior pressure pushing piston A2 of hydraulic cavities 5 moves up, and spring 1 hinders the movement of piston A2; When the pressure in hydraulic cavities 5 reached predetermined value, piston A2 moved up and Compress Spring 1 under hydraulic action, and the deflection of spring 1 surpasses certain limit, and the lower end of piston A2 is retracted into leakage fluid dram 3 when above, and the liquid in hydraulic cavities 5 is from leakage fluid dram 3 discharges; At this moment, pressure drop in hydraulic cavities 5, the suffered liquid internal pressure in piston A2 lower end reduces, under the pressure differential effect of the elastic force of spring 1 and liquid internal pressure, piston A2 moves downward, thereby makes the liquid internal pressure in hydraulic cavities 5 return to certain value, and impels piston B7 to promote swivel joint 8 and push down rock core 9, after this, continue to promote drill bit post 6 to pressing down and the rotary cutting rock.
Drill bit post 6 presses down in process, the interior pressure of the interior hydraulic cavities 5 of drill bit post 6 raises again, pushing piston A2 moves up and higher than leakage fluid dram 3, liquid in hydraulic cavities 5 is discharged, the interior drops of hydraulic cavities 5, piston A2 moves downward, and hydraulic cavities 5 is sealed and guaranteed that certain pressure impels piston B7 to promote swivel joint 8 and contacts with rock core 9.
In the present embodiment, drilled dry core bit with pressure such as above-mentioned process iterative cycles, constantly promote drill bit post 6 to pressing down, and rotary cutting rock core 9, after work is completed, can pass through the liquid injection port filling liquid, is sealing state during work.
Fig. 2 is the process of coring schematic diagram embodiment illustrated in fig. 1, the duty of X when just having started to core in the present embodiment, and this moment, hydraulic cavities 5 volumes were larger, and required liquid is more, and the stroke of spring 1 is less; State shown in Y is one of the state in pilot process of coring, and this moment, the volume of hydraulic cavities 5 was medium; State shown in Z is to core to finish front state, this moment, the process of coring drew to an end, after this, by regulating the inlet discharge capacity to higher value, drilling cuttings in wash boring, slow circumvolve also promotes drill bit to the position shown in X, then takes out the cylindrical rock core that has cut, the rock core that cleaning is taken out and numbering.
More multioperation is all known for those of ordinary skills, repeats no more.
Drilled dry core bit with pressure described in the present embodiment can be avoided the infringement to rock core, and the success rate of coring is high, for the extraction of on-site land survey and laboratory research data, all has good effect preferably.
The technical scheme of the described drilled dry core bit with pressure of the present embodiment comprises any combination of each part mentioned above, and the simple change of each part mentioned above assembly or combination are still protection domain of the present utility model.
Claims (9)
1. drilled dry core bit with pressure, comprise drill bit post, piston, spring, its medi-spring inlay bur headpin is inner, the spring upper end contacts with drill bit post inner surface, the spring lower end is connected with piston, comprise liquid injection port and leakage fluid dram on the drill bit post, it is characterized in that: the quantity of described piston is at least two.
2. drilled dry core bit with pressure as claimed in claim 1, it is characterized in that: the piston of described drilled dry core bit with pressure comprises piston A and piston B, and the top of described piston A is connected with spring.
3. drilled dry core bit with pressure as claimed in claim 2, it is characterized in that: described drilled dry core bit with pressure comprises swivel joint.
4. drilled dry core bit with pressure as claimed in claim 3, it is characterized in that: described piston B lower end is connected with described swivel joint.
5. drilled dry core bit with pressure as claimed in claim 4, it is characterized in that: the side of described piston B coordinates with drill bit post inner surface.
6. drilled dry core bit with pressure as claimed in claim 2, it is characterized in that: the fit system of the side of described piston B and drill bit post inner surface is matched in clearance.
7. drilled dry core bit with pressure as claimed in claim 1, it is characterized in that: the material of described drill bit post is alloy steel.
8. drilled dry core bit with pressure as claimed in claim 2, it is characterized in that: the material of described piston A is the 45# steel.
9. drilled dry core bit with pressure as claimed in claim 2, it is characterized in that: the material of described piston B is the 45# steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201483984U CN203285340U (en) | 2013-03-27 | 2013-03-27 | With-pressure drying drill coring bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201483984U CN203285340U (en) | 2013-03-27 | 2013-03-27 | With-pressure drying drill coring bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203285340U true CN203285340U (en) | 2013-11-13 |
Family
ID=49541710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201483984U Expired - Fee Related CN203285340U (en) | 2013-03-27 | 2013-03-27 | With-pressure drying drill coring bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203285340U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206171A (en) * | 2013-03-27 | 2013-07-17 | 中国石油大学(北京) | Coring bit with pressure drilling at circulation break |
-
2013
- 2013-03-27 CN CN2013201483984U patent/CN203285340U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206171A (en) * | 2013-03-27 | 2013-07-17 | 中国石油大学(北京) | Coring bit with pressure drilling at circulation break |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20150327 |
|
| EXPY | Termination of patent right or utility model |