GB823417A - Improvements in and relating to core drills and drilling methods - Google Patents
Improvements in and relating to core drills and drilling methodsInfo
- Publication number
- GB823417A GB823417A GB2806956A GB2806956A GB823417A GB 823417 A GB823417 A GB 823417A GB 2806956 A GB2806956 A GB 2806956A GB 2806956 A GB2806956 A GB 2806956A GB 823417 A GB823417 A GB 823417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bit
- core
- teeth
- drilling
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005553 drilling Methods 0.000 title abstract 5
- 238000000034 method Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 abstract 4
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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Drilling Tools (AREA)
Abstract
823,417. Boring earth. COMITETUL GEOLOGIC DE CERCETARI SI EXPLORARE A SOLULUI SI SUBSOLULUI. Sept. 13, 1956, No.28069/56. Class 85 A core bit is formed so that the bulk of the drilling fluid is returned to the surface without passing over the teeth of the bit. The bit has an internal ring 35 fitted adjacent the teeth 32, and a slot 36 extending from between a pair of teeth, the aperture formed by the slot and the ring being the passage for the bulk of the drilling fluid. When after drilling, the desired length of core 18 is obtained, the supply of fluid to the bit is cut off by means of a sleeve valve located in the drill string and moved by the pressure of the fluid acting on a ball which is dropped down the string. Drilling is then resumed, and the heat generated causes the core to be separated from the bottom of the hole and fixed within the bit. A bit is also described (Fig. 1, not shown), which has a split ring having internal teeth which tend to grip the core during removal of the bit from the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2806956A GB823417A (en) | 1956-09-13 | 1956-09-13 | Improvements in and relating to core drills and drilling methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2806956A GB823417A (en) | 1956-09-13 | 1956-09-13 | Improvements in and relating to core drills and drilling methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB823417A true GB823417A (en) | 1959-11-11 |
Family
ID=10269775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2806956A Expired GB823417A (en) | 1956-09-13 | 1956-09-13 | Improvements in and relating to core drills and drilling methods |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB823417A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827886A (en) * | 2020-08-25 | 2020-10-27 | 黄河勘测规划设计研究院有限公司 | Double-pipe side-spray PDC bit for clear water drilling of muddy interlayer |
| CN116927692A (en) * | 2023-09-15 | 2023-10-24 | 菏泽市自然资源和规划局 | Rock sampler |
-
1956
- 1956-09-13 GB GB2806956A patent/GB823417A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827886A (en) * | 2020-08-25 | 2020-10-27 | 黄河勘测规划设计研究院有限公司 | Double-pipe side-spray PDC bit for clear water drilling of muddy interlayer |
| CN116927692A (en) * | 2023-09-15 | 2023-10-24 | 菏泽市自然资源和规划局 | Rock sampler |
| CN116927692B (en) * | 2023-09-15 | 2023-12-01 | 菏泽市自然资源和规划局 | Rock sampler |
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