CN109519116B - Fast drilling process for hard stratum in mineral resource exploration - Google Patents
Fast drilling process for hard stratum in mineral resource exploration Download PDFInfo
- Publication number
- CN109519116B CN109519116B CN201710849438.0A CN201710849438A CN109519116B CN 109519116 B CN109519116 B CN 109519116B CN 201710849438 A CN201710849438 A CN 201710849438A CN 109519116 B CN109519116 B CN 109519116B
- Authority
- CN
- China
- Prior art keywords
- drilling
- bit
- drill bit
- diamond
- speed
- Prior art date
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- 238000005553 drilling Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 9
- 239000011707 mineral Substances 0.000 title claims abstract description 9
- 239000010432 diamond Substances 0.000 claims abstract description 20
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 19
- 238000011010 flushing procedure Methods 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a mineral resource exploration drilling process method, in particular to a hard stratum rapid drilling process method, which is characterized in that a diamond-impregnated bit with a hard matrix is used, the hardness of the matrix is HRC25-30 degrees, the mesh number of diamond is 60-80 meshes, the drilling speed of the first drilling round of a new bit put into a drill hole is firstly confirmed, when the drilling speed is gradually reduced and is less than 1-3 times of the drilling speed of the first drilling round, the supply of flushing fluid is cut off, the bit is dried and ground at the bottom of the hole, when the drilling torque is increased by 10-15 percent and the revolving pressure is increased by 1-2Mpa, the flushing fluid is opened to cool the bit and rock powder at the bottom of the bit is discharged, and normal drilling is resumed, the invention does not need frequent tripping to replace the bit in the drilling process, effectively reduces the drilling cost and improves the drilling efficiency, is a very fast and practical hard formation fast drilling process method.
Description
Technical Field
The invention relates to a mineral resource exploration drilling process method, in particular to a hard stratum rapid drilling process method.
Background
In mineral resource exploration, prospecting engineering is an indispensable means, and during sampling and drilling of a rock core, hard strata are frequently encountered, the drilling speed is slow, and is 1-20 times slower than normal drilling.
The method implemented at home at present is as follows: using an impregnated diamond drill bit with small diamond particles and a matrix with larger mesh number and low hardness; meanwhile, the rotating speed and the pressure of the drilling tool can be properly improved, and the times and the pressure for carving rocks in unit time of each diamond are increased.
One method is to put broken glass, broken ceramic or hard quartz particles, quartz sand, broken diamond blocks, etc. into the hole when the drilling speed is reduced. After the diamond bit and the feed are ground and corroded at the bottom of the hole for a period of time, the rotating speed can be increased, the pressure is increased, and normal drilling is recovered.
The other method is to erode the diamond matrix with strong acid or directly grind the diamond bit with a grinding wheel or other tools to promote the diamond to be edged so as to achieve the purpose of improving the drilling speed.
The method improves the drilling speed for people, but also causes the problems of short service life of the drill bit and frequent drill bit tripping and replacing, increases a large amount of auxiliary working time and labor intensity of workers, greatly reduces the drilling efficiency and greatly increases the drilling cost.
Disclosure of Invention
The invention aims to provide a process method for rapidly drilling a hard stratum in mineral resource exploration, aiming at solving the problem of slow drilling speed of the hard stratum in mineral resource exploration.
In order to solve the technical problems, the adopted technical scheme is as follows:
1. using an impregnated diamond bit with high matrix hardness, wherein the hardness is 25-30 degrees generally, and the diamond mesh number is 60-80 meshes;
2. when the drilling speed is reduced to be 1-3 times less than that of the first drilling time and before the phenomenon of skidding does not occur, the supply of flushing liquid is cut off, so that the drill bit is dried and ground at the bottom of the hole;
3. when the drilling torque is increased by 10-15% and the rotary pressure is increased by 1-2Mpa, opening flushing fluid to cool the drill bit and discharging rock powder at the bottom of the drill bit, wherein the original diamond particles with the particle size of only 0.25 mm are burnt and ground, and new diamond particles with edges and corners appear at the moment, so that normal drilling is resumed.
Compared with the prior art: the invention does not need to frequently trip and replace the drill bit, reduces a large amount of auxiliary working time, reduces the labor intensity of workers, improves the drilling efficiency and effectively reduces the drilling cost.
Detailed Description
The method comprises the following implementation steps:
1. determining the drilling speed of the first drilling return time when a new drill bit is put into the drill hole; because the exposed diamonds on the surface of the new drill bit are sharp edges and corners, the new drill bit can be pressed strongly under the same drilling pressure, can be cut into rocks and has high drilling speed; along with the drilling, the diamond edges and corners are ground flat, but the tire bodies wrapping the diamond edges and corners are not ground off at the same time, the pressure is reduced sharply, and the rock cannot be taken out more quickly until the phenomenon of skidding occurs;
2. when the drilling efficiency gradually slows to the point that the drilling rod does not advance, and the drilling speed is reduced to 1-3 times of the drilling speed of the first drilling cycle, cutting off the supply of flushing liquid, and enabling the drill bit to be dried and ground at the bottom of the hole;
3. when the drilling torque is increased by 10-15% and the rotary pressure is increased by 1-2Mpa, opening flushing fluid to cool the drill bit and discharging rock powder at the bottom of the drill bit, and recovering normal drilling. At this time, the diamond particles which are originally ground flat are burnt and ground off, and new diamond particles with edges and corners are exposed again, so that normal drilling is resumed.
The rapid drilling process method for the hard stratum in mineral resource exploration, provided by the invention, has the advantages that: the drill bit does not need to be replaced by frequently tripping the drill bit, so that the drilling cost is effectively reduced, the drilling efficiency is improved, and the method is a very quick and practical hard formation quick drilling process method.
Claims (1)
1. A hard stratum fast drilling process method in mineral resource exploration is characterized in that: firstly, confirming the drilling speed of a new drill bit which is put into a drill hole for the first drilling time; secondly, when the drilling efficiency gradually slows down to the point that the drilling is not carried to scale and the drilling speed is reduced to 1-3 times of the drilling speed of the first drilling time, cutting off the supply of flushing liquid to dry-burn and grind the drill bit at the bottom of the hole; thirdly, when the drilling torque is increased by 10-15% and the rotary pressure is increased by 1-2Mpa, opening flushing fluid to cool the drill bit and discharging rock powder at the bottom of the drill bit, and recovering normal drilling;
the drill bit is an impregnated diamond drill bit with a hard matrix, the hardness of the matrix is HRC25-30 degrees, and the mesh number of the diamond is 60-80 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710849438.0A CN109519116B (en) | 2017-09-20 | 2017-09-20 | Fast drilling process for hard stratum in mineral resource exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710849438.0A CN109519116B (en) | 2017-09-20 | 2017-09-20 | Fast drilling process for hard stratum in mineral resource exploration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519116A CN109519116A (en) | 2019-03-26 |
| CN109519116B true CN109519116B (en) | 2020-12-25 |
Family
ID=65768473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710849438.0A Active CN109519116B (en) | 2017-09-20 | 2017-09-20 | Fast drilling process for hard stratum in mineral resource exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519116B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2464924Y (en) * | 2000-12-13 | 2001-12-12 | 王效勤 | Multi-stage combined dimond composite piece drill |
| CA2794094C (en) * | 2012-10-31 | 2020-02-18 | Resource Energy Solutions Inc. | Methods and systems for improved drilling operations using real-time and historical drilling data |
| US9022140B2 (en) * | 2012-10-31 | 2015-05-05 | Resource Energy Solutions Inc. | Methods and systems for improved drilling operations using real-time and historical drilling data |
| CN103742101B (en) * | 2014-01-02 | 2016-04-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of technique of casing off stratum |
| CN106988781B (en) * | 2017-04-25 | 2019-10-01 | 中煤科工集团西安研究院有限公司 | Coal mine down-hole tunnel is precisely to wearing draining hole construction method |
-
2017
- 2017-09-20 CN CN201710849438.0A patent/CN109519116B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109519116A (en) | 2019-03-26 |
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