FR2359273A1 - Cable type coring system - with adjustable water cooling control valve preventing destruction of drill bit on failure of cooling water supply - Google Patents
Cable type coring system - with adjustable water cooling control valve preventing destruction of drill bit on failure of cooling water supplyInfo
- Publication number
- FR2359273A1 FR2359273A1 FR7720085A FR7720085A FR2359273A1 FR 2359273 A1 FR2359273 A1 FR 2359273A1 FR 7720085 A FR7720085 A FR 7720085A FR 7720085 A FR7720085 A FR 7720085A FR 2359273 A1 FR2359273 A1 FR 2359273A1
- Authority
- FR
- France
- Prior art keywords
- drilling
- tube
- pump
- inner tube
- water
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 9
- 238000001816 cooling Methods 0.000 title abstract 2
- 230000006378 damage Effects 0.000 title abstract 2
- 239000000498 cooling water Substances 0.000 title 1
- 238000005553 drilling Methods 0.000 abstract 9
- 239000000725 suspension Substances 0.000 abstract 2
- 239000004927 clay Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
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)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
In a cable-type cored sampler, comprising an inner tube (i) within an external tube formed by a pipe string supporting a drilling bit and (ii) equipped at its lower end with a core extractor sleeve and with a head at its upper end suspended from a cable for its extraction and optionally for lowering the inner tube, whereby (iii) this tube not only possesses a suspension lug resting during drilling on a ring for suspension of the external tube but also has locking means engaged during drilling in an annular notch for locking this outer tube, (iv) the tube forms a water passage running from top to bottom in the external tube for the admission of a stream of water delivered by a pump on the surface to the drilling zone for cooling the drilling bit and for discharging the drilling debris from the bottom to the top between the outer tube and borehole wall, the improvement whereby (a) the head of the inner tube has an adjustable water flow control valve, operating as a result of the pump above a predetermined water pressure indicated at the pump and at least equal to the water pressure, difference between the underground water level and the level of the surface pump, when the depth of drilling and coring exceeds this underground this underground level or at least equals the pressure due to the water level difference between the bottom of the borehole and the level of the surface pump when the depth of drilling and coving do not reach the underground level, in such a way as (b) to remain closed during the lowering of the inner tube in the outer tube until it reaches the lug on the head of the inner tube and locks this in the locking notch (c) to be subsequently opened for coring as a result of a pressure increase - shown at the pump to be greater than the above-mentioned pre-determined pressure and (d) to be reclosed finally after coving as a result of a decrease of that pressure caused by stopping the pump, so as to unlock and raise the inner tube together with the core sample. The provision of the control valve at the head of the inner tube enables the rapid wear and/or destruction of the drilling bit due to deprivation of water following plugging caused by clay strata, to be avoided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE169113A BE844368A (en) | 1976-07-20 | 1976-07-20 | CABLE TYPE CORE TANKER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2359273A1 true FR2359273A1 (en) | 1978-02-17 |
| FR2359273B3 FR2359273B3 (en) | 1980-05-09 |
Family
ID=3842904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7720085A Granted FR2359273A1 (en) | 1976-07-20 | 1977-06-30 | Cable type coring system - with adjustable water cooling control valve preventing destruction of drill bit on failure of cooling water supply |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2359273A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052672A1 (en) * | 1980-11-21 | 1982-06-02 | DIAMANT BOART Société Anonyme | Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose |
| US4832138A (en) * | 1987-05-13 | 1989-05-23 | Diamant Boart S.A. | Device to control the locking of a boring corer |
| CN105863629A (en) * | 2016-04-14 | 2016-08-17 | 南华大学 | Geological sampling device |
| CN115575177A (en) * | 2022-11-24 | 2023-01-06 | 廊坊市交通公路工程有限公司 | Core drilling machine for bending-pulling strain testing system of cement stabilized macadam base traffic pavement |
-
1977
- 1977-06-30 FR FR7720085A patent/FR2359273A1/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052672A1 (en) * | 1980-11-21 | 1982-06-02 | DIAMANT BOART Société Anonyme | Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose |
| US4832138A (en) * | 1987-05-13 | 1989-05-23 | Diamant Boart S.A. | Device to control the locking of a boring corer |
| CN105863629A (en) * | 2016-04-14 | 2016-08-17 | 南华大学 | Geological sampling device |
| CN105863629B (en) * | 2016-04-14 | 2019-09-27 | 南华大学 | A kind of geology sampling apparatus |
| CN115575177A (en) * | 2022-11-24 | 2023-01-06 | 廊坊市交通公路工程有限公司 | Core drilling machine for bending-pulling strain testing system of cement stabilized macadam base traffic pavement |
| CN115575177B (en) * | 2022-11-24 | 2023-03-14 | 廊坊市交通公路工程有限公司 | Core drilling machine for bending-pulling strain testing system of cement stabilized macadam base traffic pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2359273B3 (en) | 1980-05-09 |
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