EP4536929A1 - Teil eines bohrkopfes für ein plasma-puls-geo-bohrsystem - Google Patents
Teil eines bohrkopfes für ein plasma-puls-geo-bohrsystemInfo
- Publication number
- EP4536929A1 EP4536929A1 EP23730351.6A EP23730351A EP4536929A1 EP 4536929 A1 EP4536929 A1 EP 4536929A1 EP 23730351 A EP23730351 A EP 23730351A EP 4536929 A1 EP4536929 A1 EP 4536929A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill head
- rod electrodes
- electrode
- rod
- electrodes
- 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
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
- E21B7/14—Drilling by use of heat, e.g. flame drilling
- E21B7/15—Drilling by use of heat, e.g. flame drilling of electrically generated heat
-
- 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
- E21B7/14—Drilling by use of heat, e.g. flame drilling
Definitions
- Deep drilling into hard, crystalline rock represents a major challenge for conventional rotary drilling systems as it involves high bit wear and frequent bit replacement, low penetration rates and poor process efficiency.
- PPGD Plasma-Pulse Geo-Drilling
- the PPGD technology uses high voltage of several 100 kilovolts in the form of electrical pulses increasing at nanosecond speeds through the rock, creating a plasma in the rock that shatters the rock from the inside out, i.e. against its low tensile strength, without mechanical abrasion of a drilling tool, thereby creating a deep borehole becomes.
- Rossi et al Advanced drilling technologies to improve the economics of deep georesource utilization
- Applied Energy Symposium: MIT A+B, August 12-14, 2020, Cambridge, USA it is indicated that by means of a drill head initial part 2, a high-voltage pulse generator 1 and electrodes in a borehole filled with water 5, a borehole including propulsion can be achieved due to the high-voltage pulses.
- Figure 2b is a schematic side view of the drill head start part, without high-voltage connections and generator and
- Figure 3 shows a schematic perspective of another drill head start part with outer slightly tilted rod electrodes. Description
- High-voltage cables 10 can be connected to the connecting flanges 211, 211' as an embodiment of the high-voltage supply 10 of a high-voltage generator 1, which is indicated in Figure 2a with a high-voltage symbol. Sufficient stability must also be achieved in the drill head connection section 21 so that short circuits are prevented. Although no mechanical loads occur here as in classic rotary drilling systems, since there is no rotational movement, the pressure with which the drill head start part 2 is pressed onto the rock 4 in the feed direction is quite high. Ideally, the axial load on the drill head start part 2 is practically zero.
- the rod electrodes 200 are each connected to the first connecting flange 211 or to the second connecting flange 211 'without short circuits or flashovers. This means that different stick electrodes 200 can have different polarizations.
- L/a of 1: 1 to 5: 1 is advantageous.
- the length L of the stick electrodes 200 is measured regardless of the attachment between the tip of the stick electrode 200 and the rear end of the stick electrode 200 opposite the tip.
- the n rod electrodes 200 with different polarities were arranged in such a way that the distance a between the next adjacent rod electrodes 200 is at least 10 mm, rather larger than 40mm, particularly preferably 48mm.
- the cross-sectional area Q of the electrode section 20 must be chosen to be greater than the cross-sectional area q of the drill head connection section 21 so that the drill head start part 2 creates a sufficiently large borehole and can be tracked into the borehole.
- the cross-sectional area q or the maximum diameter corresponds to the diameter of the second connecting flange 211 '.
- outer rod electrodes 200' which are furthest away from the central longitudinal axis, are arranged not parallel to the longitudinal axis, but at an angle away from the longitudinal axis.
- This embodiment is shown schematically in FIG. 3, with only an upper half of the drill head start part 2' being shown.
- the angle of the outer rod electrodes 200' to the longitudinal axis should be 1.5° and more.
- Rock parts broken out during operation so-called cuttings, are reduced in size by the uniform, homogeneous arrangement of the rod electrodes 200 in such a way that the transport diameter for removal is safely achieved and the cuttings are prevented from jamming in the drill head start part 2.
- Good drilling results were achieved in the tests carried out, which are also advantageous in continuous drilling operations.
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)
- Earth Drilling (AREA)
- Plasma Technology (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH000703/2022A CH719769A2 (de) | 2022-06-10 | 2022-06-10 | Bohrkopfanfangsteil als Teil eines Bohrkopfes für ein Plasma-Puls-Geo-Bohrsystem. |
| PCT/CH2023/050019 WO2023235993A1 (de) | 2022-06-10 | 2023-06-02 | Teil eines bohrkopfes für ein plasma-puls-geo-bohrsystem |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4536929A1 true EP4536929A1 (de) | 2025-04-16 |
| EP4536929C0 EP4536929C0 (de) | 2026-02-11 |
| EP4536929B1 EP4536929B1 (de) | 2026-02-11 |
Family
ID=86764886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23730351.6A Active EP4536929B1 (de) | 2022-06-10 | 2023-06-02 | Teil eines bohrkopfes für ein plasma-puls-geo-bohrsystem |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4536929B1 (de) |
| CH (1) | CH719769A2 (de) |
| WO (1) | WO2023235993A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227955B (zh) * | 2020-11-04 | 2025-08-29 | 北京三一智造科技有限公司 | 脉冲破岩钻头及脉冲破岩钻机 |
| CN112227953B (zh) * | 2020-11-04 | 2025-06-27 | 北京三一智造科技有限公司 | 碎岩钻头及碎岩钻机 |
| CN113187405B (zh) * | 2021-06-02 | 2023-08-18 | 辽宁石油化工大学 | 一种水力驱动多维式等离子联合钻头及其钻井方法 |
| CN113187398B (zh) * | 2021-06-02 | 2023-06-02 | 辽宁石油化工大学 | 新型磁力连续脉冲等离子钻头及钻井方法 |
-
2022
- 2022-06-10 CH CH000703/2022A patent/CH719769A2/de unknown
-
2023
- 2023-06-02 WO PCT/CH2023/050019 patent/WO2023235993A1/de not_active Ceased
- 2023-06-02 EP EP23730351.6A patent/EP4536929B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CH719769A2 (de) | 2023-12-15 |
| WO2023235993A1 (de) | 2023-12-14 |
| EP4536929C0 (de) | 2026-02-11 |
| EP4536929B1 (de) | 2026-02-11 |
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