CN103195385B - Wet brill core bit with pressure - Google Patents
Wet brill core bit with pressure Download PDFInfo
- Publication number
- CN103195385B CN103195385B CN201310104712.3A CN201310104712A CN103195385B CN 103195385 B CN103195385 B CN 103195385B CN 201310104712 A CN201310104712 A CN 201310104712A CN 103195385 B CN103195385 B CN 103195385B
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- drill bit
- piston
- pressure
- rock core
- post
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Abstract
A kind of wet brill core bit with pressure, comprise drill bit post, drill bit, swivel joint, piston, spring, be connected with drill bit below drill bit post, setting-in swivel joint in drill bit post, piston is connected with spring, comprise rock core clamping chamber in drill bit post, swivel joint bottom and rock core clamp chamber and contact, and piston and spring are placed in rock core and clamp bottom in chamber.Wet brill core bit with pressure provided by the invention can avoid the infringement to rock core, and success rate of coring is high, and the extraction for on-site land survey and laboratory research data all has good good effect.
Description
Technical field
The present invention relates to a kind of geotechnical engineering and petroleum works rock sample core bit, particularly a kind of wet brill core bit with pressure.
Background technology
In geotechnical engineering, mechanical properties of rock is the most basic data of engineering design, often will be obtained the mechanics parameter of engineering rock by a large amount of Experiments of Machanics, and drilling through of rock sample is the first step of whole process, is also the first step affecting experimental data validity.Draw a problem thus: process of coring necessarily comprises damage, and these damages have a certain impact to later stage parameter measurement, hard or high strength rocks for some, this impact can be ignored and not remember.And for some weak cementing, stratiform or fissured rock, success rate of coring is extremely low, even if obtain complete rock core, the impact of damage also greatly changes the character of rock core.
Summary of the invention
The present invention, namely for above-mentioned defect, provides a kind of solution process of coring to cause the with pressure wet brill core bit of damage because of earth pressure release and rock core wall friction.
To achieve these goals, a first aspect of the present invention provides a kind of wet brill core bit with pressure.
Drill bit post, drill bit, swivel joint, piston, spring is comprised according to the with pressure wet brill core bit of first aspect present invention, be connected with drill bit below drill bit post, setting-in swivel joint in drill bit post, piston is connected with spring, rock core clamping chamber is comprised in drill bit post, swivel joint bottom and rock core clamp chamber and contact, and piston and spring are placed in rock core and clamp bottom in chamber, and piston contacts with rock core.
Preferably, described rock core clamping chamber comprises leakage fluid dram.
Preferably, described rock core clamping chamber comprises inlet.
Preferably, the inlet in described rock core clamping chamber is positioned at the top in rock core clamping chamber.
Preferably, hydraulic cavities is comprised in described rock core clamping chamber.
Preferably, described rock core clamping chamber lower outside has a circle protruding, for ensureing that rock core overlaps with the axial line of drill bit.
Preferably, the liquid in described hydraulic cavities is kerosene.
Preferably, the liquid in described hydraulic cavities is diesel oil.
Preferably, the liquid in described hydraulic cavities is mineral oil.
Preferably, the liquid in described hydraulic cavities is the medium of coring for the preparation of rock property specialized designs.
Preferably, described piston comprises pressure limiting piston, has notch in described pressure limiting piston, too high for limiting rock core clamping cavity pressure, ensures that safety drills through.
Preferably, described piston comprises valve piston, and the shape of described valve piston is cylindrical, for maintaining the pressure in rock core clamping chamber.
Preferably, comprise pressure limiting structure in described rock core clamping chamber, this pressure limiting structure comprises spring and valve piston, and the displacement of described pressure limiting structure and spring rate determine the size of voltage limiting value.
Preferably, described valve piston is positioned at the notch of pressure limiting piston, and valve piston and pressure limiting piston are interference fits.
Preferably, the pressure in described hydraulic cavities is maintained within the scope of certain numerical value by pressure limiting structure.
Preferably, the pressure limit of described hydraulic cavities is 5-10atm.
Preferably, drill bit post and piston are threaded connection.
Preferably, drill bit post and piston are matched in clearance.
Preferably, drill bit post comprises two sections of different cylinders of diameter.
Preferably, swivel joint is inlaid in the larger cylinder of the diameter of drill bit post.
Preferably, described swivel joint comprises rotating part and non-rotating part.
Preferably, the rotating part of described swivel joint contacts with drill bit post.
Preferably, the non-rotating part of described swivel joint clamps chamber with described rock core and contacts.
The installation step of the with pressure wet brill core bit of first aspect present invention is:
1. in rock core clamping chamber, inject liquid;
2. piston is pressed into rock core clamping chamber;
3. drill bit post inner chamber is put in the rock core clamping chamber in previous step, withstand swivel joint;
4. drill bit is installed/be assembled to the below of drill bit post.
The working method of the with pressure wet brill core bit of first aspect present invention is: be placed on rock mass to be cored by the with pressure wet brill core bit assembled, inject from drill bit capital end liquid of coring, the liquid of coring entering drill bit post is filled with the space of rock core clamping outside, chamber in drill bit post, the pressure limiting structure of hydraulic cavities bottom passes through pressure limiting piston and rock contact under hydraulic drive, now rotary drilling headpin, drill bit then below drill bit post rotates rock cutting under the drive of drill bit post, along with cutting output increases, drill bit and drill bit post constantly go deep in rock mass, swivel joint then in drill bit post also drives rock core to clamp chamber and moves down, under the pressure of swivel joint and rock core, liquid in hydraulic cavities is compressed, fluid pressure raises, the pressure limiting piston and the valve piston that are positioned at rock core clamping bottom, chamber are forced to move down, the spring of valve piston bottom then hinders piston to move, therefore the pressure in hydraulic cavities slowly raises, when the pressure in hydraulic cavities reaches predetermined value, spring deflection also reaches predetermined value, the predetermined value of described spring deflection impels the position of position lower than leakage fluid dram of pressure limiting piston, thus liquid is discharged from leakage fluid dram, fluid pressure declines, drill bit no longer moves down and drills through rock core, after hydraulic pressure is lower than certain value, spring deflection reduces, and spring force also reduces thereupon, therefore pressure limiting piston upwards, and the position of pressure limiting piston is higher than leakage fluid dram, and thus hydraulic cavities becomes air-tight state again.
Fluid pressure in hydraulic cavities promotes pressure limiting piston and rock contact again, bit rock cutting, cutting output continues to increase, drill bit and drill bit post continue deeply, hydraulic cavities pressure increase, camber of spring increases and promotion pressure limiting piston moves downwardly to the position lower than leakage fluid dram again, liquid is discharged, fluid pressure declines, hydraulic pressure reduction rear spring deflection reduces again thereupon, pressure limiting piston moves up to the position higher than leakage fluid dram again, hydraulic cavities is airtight and keep certain pressure, iterative cycles like this, impel in hydraulic cavities and keep certain pressure, push down rock core.After having cored, demountable bit, overall removal of core clamping chamber, reaches the object recycled.
Wet brill core bit with pressure, as said process iterative cycles, constantly promotes drill bit to pressing down, and rotary cutting rock core.
The with pressure wet brill core bit that first aspect present invention provides can avoid the infringement to rock core, and integrality of coring is good, and the extraction for on-site land survey and laboratory research data all has very strong necessity.
The technical scheme of the with pressure wet brill core bit that first aspect present invention provides comprises any combination of each part mentioned above, and simple change or the combination of each part mentioned above assembly are still protection scope of the present invention.
A second aspect of the present invention also provides a kind of wet brill coring method with pressure, and it comprises the steps:
A. in hydraulic cavities, liquid is occupied;
B. in drill bit post, liquid is injected by the opening of drill bit capital end;
C. liquid injection port is closed;
D. make it to contact with rock mass by hydraulic drive piston;
E. towards rock matrix direction pressure drill bit;
F. rotary drill bit cuts rock.
Preferably, above step is carried out successively.
Preferably, the with pressure wet brill core bit that provides for first aspect present invention of described drill bit.
Preferably, described wet brill core bit with pressure comprises rock core clamping chamber.
Preferably, described rock core clamping chamber comprises leakage fluid dram.
Preferably, described piston comprises pressure limiting piston, has notch in described pressure limiting piston, too high for limiting rock core clamping cavity pressure, ensures that safety drills through.
Preferably, described piston comprises valve piston, and the shape of described valve piston is cylindrical, for maintaining the pressure in rock core clamping chamber.
Preferably, described valve piston is positioned at the notch of pressure limiting piston, and valve piston and pressure limiting piston are interference fits.
Preferably, drill bit post and piston are threaded connection.
Preferably, drill bit post comprises two sections of different cylinders of diameter.
Preferably, swivel joint is inlaid in the larger cylinder of the diameter of drill bit post.
Preferably, the speed that drill bit moves down is 0.1-0.5mm/s.
Preferably, during rock cutting, the velocity of rotation of drill bit is 360-420rpm
Preferably, the axial compression that in rock cutting process, rock core is subject to is for being not more than 5kg.
More multioperation is all known for those of ordinary skills, repeats no more.
The technical scheme of the with pressure wet brill coring method that second aspect present invention provides comprises any combination of each part mentioned above, and simple change or the combination of each part mentioned above assembly are still protection scope of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of with pressure wet brill core bit according to first aspect present invention;
Fig. 2 is embodiment illustrated in fig. 1 process schematic of coring.
In Fig. 1, Fig. 2, numeral represents respectively:
1 drill bit post 2 is cored liquid injection channel
3 swivel joint 4 hydraulic cavities
5 rock core clamping chamber 6 pressure limiting pistons
7 spring 8 leakage fluid drams
9 drill bit 10 rock cores
11 valve pistons
Detailed description of the invention
In order to understand the present invention better, describe the preferred embodiment according to the structure of the with pressure wet brill core bit of first aspect present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of a preferred embodiment of with pressure wet brill core bit according to first aspect present invention, in the present embodiment, wet brill core bit with pressure comprises drill bit post 1, drill bit 9, swivel joint 3, pressure limiting piston 6, valve piston 11, spring 7, be connected with drill bit 9 below drill bit post 1, setting-in swivel joint 3 in drill bit post 1, swivel joint 3 bottom and rock core clamp chamber 5 and contact, the embedded shock mount 7 of pressure limiting piston 6, pressure limiting piston 6 is placed in rock core clamping bottom, chamber 5, and pressure limiting piston 6 contacts with rock core 10.
In the present embodiment, described rock core clamping chamber 5 comprises leakage fluid dram 8.
In the present embodiment, described rock core clamping chamber 5 comprises inlet.
In the present embodiment, in described rock core clamping chamber 5, comprise hydraulic cavities 4.
In the present embodiment, described rock core clamping chamber 5 lower outside has a circle protruding, keeps axial line to overlap for limiting rock core and drill bit.
In the present embodiment, described pressure limiting piston 6 is for having the piston of notch, and its notch is too high for limiting rock core clamping cavity pressure.
In the present embodiment, the shape of described valve piston 11 is cylindrical, for maintaining the pressure in rock core clamping chamber.
In the present embodiment, described valve piston 11 is positioned at the notch of pressure limiting piston 6, and valve piston 11 and pressure limiting piston 6 are interference fits.
In the present embodiment, drill bit post 1 and pressure limiting piston 6 are threaded connection.
In the present embodiment, drill bit post 1 comprises two sections of different cylinders of diameter.
In the present embodiment, swivel joint 3 is inlaid in the larger cylinder of the diameter of drill bit post 1.
Preferably, described swivel joint 3 comprises rotating part and non-rotating part.
Preferably, the rotating part of described swivel joint 3 contacts with drill bit post 1.
Preferably, the non-rotating part of described swivel joint 3 clamps chamber 5 with described rock core and contacts.
In the present embodiment, the installation step of wet brill core bit with pressure is:
1. in rock core clamping chamber 5, inject liquid;
2. piston is pressed into rock core clamping chamber 5;
3. drill bit post 1 inner chamber is put in the rock core clamping chamber 5 in previous step, withstand swivel joint;
4. drill bit 9 is installed/be assembled to the below of drill bit post 1.
In the present embodiment, the working method of wet brill core bit with pressure is: be placed on rock mass to be cored by the with pressure wet brill core bit assembled, inject from drill bit post 1 top liquid of coring, the liquid of coring entering drill bit post 1 is filled with the space of rock core clamping outside, chamber 5 in drill bit post 1, the pressure limiting structure of hydraulic cavities 4 bottom passes through pressure limiting piston 6 and rock contact under hydraulic drive, now rotary drilling headpin 1, drill bit 9 then below drill bit post 1 rotates rock cutting under the drive of drill bit post 1, along with cutting output increases, drill bit 9 and drill bit post 1 constantly advance in rock mass, swivel joint 3 then in drill bit post 1 also drives rock core to clamp chamber 5 and moves down, under the pressure of swivel joint 3 and rock core 10, liquid in hydraulic cavities 4 is compressed, fluid pressure raises, the pressure limiting piston 6 and the valve piston 11 that are positioned at rock core clamping bottom, chamber 5 are forced to move down, 7, the spring of valve piston 11 bottom hinders valve piston 11 and pressure limiting piston 6 to move, therefore the pressure in hydraulic cavities 4 slowly raises, when the pressure in hydraulic cavities 4 reaches predetermined value, spring 7 deflection also reaches predetermined value, the predetermined value of described spring 7 deflection impels the position of pressure limiting piston 6 lower than the position of leakage fluid dram 8, thus liquid is discharged from leakage fluid dram 8, fluid pressure declines, drill bit 9 no longer moves down and drills through rock core 10, after hydraulic pressure is lower than certain value, spring 7 deflection reduces, and spring 7 elastic force also reduces thereupon, and therefore pressure limiting piston 6 moves upward, and the position of pressure limiting piston 6 is higher than leakage fluid dram 8, and thus hydraulic cavities 4 becomes air-tight state again.
Fluid pressure in hydraulic cavities 4 promotes pressure limiting piston 6 and rock contact again, drill bit 9 rotary cutting rock, cutting output continues to increase, drill bit 9 and drill bit post 1 continue deeply, hydraulic cavities 4 pressure increase, spring 7 is out of shape increase and promotion pressure limiting piston 6 moves downwardly to the position lower than leakage fluid dram 8 again, liquid is discharged, fluid pressure declines, hydraulic pressure reduction rear spring 7 deflection is again little thereupon, pressure limiting piston 6 moves up to the position higher than leakage fluid dram 8 again, hydraulic cavities 4 is airtight and keep certain pressure, iterative cycles like this, impel in hydraulic cavities 4 and keep certain pressure, push down rock core 10, after having cored, demountable bit 9, overall removal of core clamping chamber 5, reaches the object recycled.
Wet brill core bit with pressure, as said process iterative cycles, constantly promotes drill bit 9 to pressing down, and rotary cutting rock core 10.
Fig. 2 is embodiment illustrated in fig. 1 process schematic of coring, and in the present embodiment, X has just started duty when coring, and now hydraulic cavities volume is comparatively large, and required liquid is more, and the stroke of spring is less; State shown in Y is one of state of coring in pilot process, and now the volume of hydraulic cavities is medium; State shown in Z is the state before terminating of coring, now the process of coring draws to an end, after this, by regulating inlet discharge capacity to higher value, the drilling cuttings in wash boring, slow circumvolve also promotes core bit to initial position, then cylindrical rock core is taken out, cleaning, numbering, so far, the process of coring completes.
More multioperation is all known for those of ordinary skills, repeats no more.
With pressure wet brill core bit described in the present embodiment can avoid the infringement to rock core, and success rate of coring is high, and the extraction for on-site land survey and laboratory research data all has good good effect.
The technical scheme of the with pressure wet brill core bit described in the present embodiment comprises any combination of each part mentioned above, and simple change or the combination of each part mentioned above assembly are still protection scope of the present invention.
Claims (3)
1. a wet brill core bit with pressure, comprise drill bit post (1), drill bit (9), swivel joint (3), piston, spring (7), drill bit post (1) below is connected with drill bit (9), the interior setting-in swivel joint (3) of drill bit post (1), piston is connected with spring (7), it is characterized in that: in drill bit post (1), comprise rock core clamping chamber (5), swivel joint (3) bottom and rock core clamp chamber (5) and contact, piston and spring (7) are placed in rock core and clamp chamber (5) interior bottom, rock core clamping chamber (5) comprises leakage fluid dram, hydraulic cavities (4) is comprised in rock core clamping chamber (5), described piston comprises pressure limiting piston (6) and valve piston (11), pressure limiting piston (6) comprises notch, valve piston (11) is positioned at the notch of pressure limiting piston (6), valve piston (11) and pressure limiting piston (6) are interference fits, rock core clamping chamber (5) comprises inlet.
2. wet brill core bit with pressure as claimed in claim 1, is characterized in that: drill bit post (1) and piston are threaded connection.
3. wet brill core bit with pressure as claimed in claim 1 or 2, is characterized in that: drill bit post (1) comprises two sections of different cylinders of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310104712.3A CN103195385B (en) | 2013-03-27 | 2013-03-27 | Wet brill core bit with pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310104712.3A CN103195385B (en) | 2013-03-27 | 2013-03-27 | Wet brill core bit with pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195385A CN103195385A (en) | 2013-07-10 |
| CN103195385B true CN103195385B (en) | 2015-12-23 |
Family
ID=48718184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310104712.3A Expired - Fee Related CN103195385B (en) | 2013-03-27 | 2013-03-27 | Wet brill core bit with pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103195385B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869107A (en) * | 2019-04-10 | 2019-06-11 | 中国科学院武汉岩土力学研究所 | Pressure drill bit device and drill through device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191405300A (en) * | 1913-03-06 | 1914-12-10 | Nl Mij Tot Het Verrichten Van | Improvements in and relating to Extractors for Cores produced during Boring Operations. |
| US2862691A (en) * | 1956-04-03 | 1958-12-02 | Jersey Prod Res Co | Coring bit assembly |
| EP0182498A1 (en) * | 1984-10-17 | 1986-05-28 | Diamond Oil Well Drilling Co. | Method and apparatus for preventing contamination of a coring sponge |
| CN88211420U (en) * | 1988-02-05 | 1988-12-28 | 王子平 | Piston type soil sampling device with thin wall |
| CN2163865Y (en) * | 1993-07-14 | 1994-05-04 | 辽河石油勘探局钻井一公司 | Locking and sealing device for closed core-extractor |
| CN203285341U (en) * | 2013-03-27 | 2013-11-13 | 中国石油大学(北京) | With-pressure wet drill coring bit |
-
2013
- 2013-03-27 CN CN201310104712.3A patent/CN103195385B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191405300A (en) * | 1913-03-06 | 1914-12-10 | Nl Mij Tot Het Verrichten Van | Improvements in and relating to Extractors for Cores produced during Boring Operations. |
| US2862691A (en) * | 1956-04-03 | 1958-12-02 | Jersey Prod Res Co | Coring bit assembly |
| EP0182498A1 (en) * | 1984-10-17 | 1986-05-28 | Diamond Oil Well Drilling Co. | Method and apparatus for preventing contamination of a coring sponge |
| CN88211420U (en) * | 1988-02-05 | 1988-12-28 | 王子平 | Piston type soil sampling device with thin wall |
| CN2163865Y (en) * | 1993-07-14 | 1994-05-04 | 辽河石油勘探局钻井一公司 | Locking and sealing device for closed core-extractor |
| CN203285341U (en) * | 2013-03-27 | 2013-11-13 | 中国石油大学(北京) | With-pressure wet drill coring bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195385A (en) | 2013-07-10 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20170327 |