WO2015173049A2 - Verfahren zum einbringen eines bohrlochs - Google Patents
Verfahren zum einbringen eines bohrlochs Download PDFInfo
- Publication number
- WO2015173049A2 WO2015173049A2 PCT/EP2015/059707 EP2015059707W WO2015173049A2 WO 2015173049 A2 WO2015173049 A2 WO 2015173049A2 EP 2015059707 W EP2015059707 W EP 2015059707W WO 2015173049 A2 WO2015173049 A2 WO 2015173049A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- borehole
- drill head
- thermal
- phase
- earth
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Definitions
- the invention relates to a method for introducing a borehole, in particular into the earth's crust.
- the invention is based on the object to provide an improved method for introducing a borehole, which is characterized in particular by a fast propulsion and long service life.
- This object is achieved by a method for introducing a borehole, in particular into the earth's crust, by means of a boring head which is held on a rod in the borehole, wherein the boring head comprises a thermal device, by the action of which on the bottom of the borehole material, In particular, rock is released by phase change from the solid phase, wherein the dissolved material in the direction of the opening of the borehole, in particular to the earth's surface, is transported away.
- the thermal device is operated such that it generates such a high thermal output power, whereby the material predominantly sublimates in the transition from the solid phase.
- the core of the invention lies in particular in the fact that in a thermal drilling process, the material is not even transferred by the sublimation into the liquid phase.
- the power supply is not reduced but rather increased to prevent the formation of liquid material.
- the thermal power to the material the melting depth drops to less than 1 cm, resulting in a significant reduction in the amount of liquid material at the bottom of the wellbore; This can be attributed to the short-term cooling effect of the sublimation on the underlying material layers.
- Increasing the thermal output also increases the possible feed rate.
- the sublimation of the material allows a quick discharge of the material.
- Immediately after the burner, or in some cases controlled by cooling nozzles resubstances the material to small particles that can be easily flushed out.
- the particles that are formed in a resublimation much smaller than the particles that are formed by condensation.
- the so-called plasma torches are used as the thermal device, whereby the term "burner” is sometimes used incorrectly in this context
- the high temperatures generated by the device are involved, this need not necessarily be accompanied by burning
- optical devices eg lasers, are conceivable as long as they can provide the required thermal performance.
- At least 50% by weight, preferably at least 80% by weight, at least 90% by weight or at least 95% by weight, of the material dissolved from the solid phase is converted by sublimation into the gaseous phase.
- the rest of the dissolved material first melts and only then, if at all, in the gaseous phase over.
- the high level of sublimed material also causes a sudden increase in volume, which eventually spills liquid components off the solid surface at the bottom of the well. In this respect, it is not necessarily required that the material is only released from the solid phase by sublimation.
- the phase state of the dissolved material is monitored by at least one sensor mounted on the drill head.
- the proportion of liquid material in the total discharge can be determined and measures taken if necessary.
- the phase state of the cuttings at the bottom of the borehole is optically monitored by means of the sensor mounted on the boring head.
- the proportion of the liquid phase in the total discharge can be determined continuously.
- the sensor is based in particular on pyrometric temperature determination and serves to determine the temperature difference between the dissolved material at the bottom of the borehole and its side wall. The method uses the temperature differences between the solid and liquid phases.
- the proportion of the liquid phase can be determined by means of a mathematical method in conjunction with the flame pressure.
- an amount of liquefied material at the bottom of the wellbore is controlled to a predetermined set point, the thermal output power being increased to reduce the amount of liquefied material.
- Such a regulation can ensure that the liquid content of the dissolved material does not become too large.
- the rock stored there has one or more of the following
- the borehole has in particular the following parameters:
- Distance of the earth's surface to the bottom of the borehole at least 1000 m, in particular at least 2000 m or at least 4000 m. Diameter of the borehole 2 - 30 cm, in particular less than 20 cm.
- the method described here is particularly suitable for the production of wells with a high aspect ratio (depth to diameter of the borehole) of at least 1000: 1, in particular of at least 3000: 1 or at least 10,000: 1, or very deep boreholes of at least 20,000: 1 or at least 100,000: 1.
- the power of the thermal device ie the thermal output power occurring in the process, is at least 80 kW, preferably at least 1000 kW. If a plasma generating device is selected as the thermal device, then the temperature of the exiting plasma jet at the drill head should be 2000 K, preferably at least 5000 K, in order to effect the sublimation to the required extent.
- the following gases can be used: nitrogen, acetone, oxygen, hydrogen, helium, argon and carbon dioxide.
- the power density is preferably at least 10 7 W / m 2 , preferably 5 ⁇ 10 7 W / m 2 .
- the power density is understood to be the thermal power per unit area that is applied by the thermal device to the surface of the rock.
- a gas stream is used to convey the removed material toward the surface, in particular the earth's surface.
- This can be the same gas that is used for a plasma jet.
- the material is then passed past the drill head, in particular through a gap between the drill head and the borehole.
- the sublimed material is cooled by a cooling gas stream separate from the plasma jet.
- This preferably forms a gas cushion between the sublimated rock and the drill head.
- this cooling gas flow or the gas cushion on the one hand ensures that the sublimated material does not come into contact with the drill head.
- a cooling of the sublimated material can be effected so that it comes to Resublimation and thereby to a kind of dusting or formation of very small particles. This dusty material is then conveyed up through the gap.
- the Resublimation can also be done directly on the wall of the borehole, so that deposited there material and thus causes a glazing of the borehole.
- the cooling gas flow is injected laterally into the gap between the drill head and the borehole. This can be prevented that the gaseous material comes into contact with the drill head and condenses on this and solidifies or resublimates.
- the invention further relates to a device for introducing a borehole, in particular into the earth's crust.
- the device comprises a drill head, a linkage for holding the drill head in the wellbore, and a thermal device disposed on the wellhead, by the action of which at the bottom of the wellbore material is released therefrom by phase change from the solid phase.
- the device further comprises a, in particular mounted on the drill head, sensor with which the phase state of the dissolved material can be monitored in particular at the bottom of the borehole.
- a photo-optical sensor in particular a pyrometer can be used. With the aid of such a device, the control of the thermal output power described above can be realized.
- FIG. 1 shows a borehole with a drill head inserted therein in cross section
- Figure 2 schematically shows the borehole of Figure 1 with different
- FIG. 1 Shown in FIG. 1 is a borehole 1 which is introduced from the earth's surface 7 into the earth's crust 3.
- the borehole should now be enlarged, so that it can penetrate into further depths.
- a drill head 4 is provided, which is held by means of a linkage 5, which projects coaxially to the borehole 7 from the earth's surface 7 into the borehole 7.
- a plasma generating device 6 is arranged, which generates a plasma jet 8. With the aid of the plasma jet 8, which has temperatures of 2000 K or more, rock 3 at the bottom 2 of the borehole 1 is released from the solid phase and thus removed.
- the plasma generating device corresponds in its basic structure to already known devices of this type and comprises a central inner anode 10 and an annular cathode 9, arranged coaxially with the anode 10.
- a gas suitable for plasma formation for example nitrogen, oxygen, hydrogen, argon , Helium, carbon dioxide, injected at high pressure in the area between the cathode 9 and anode 10.
- the Arrangement of anode 10 and cathode 9 generates a correspondingly applied high voltage an arc through which the plasma or the plasma jet 8 is generated.
- the gas undergoes an enormous increase in temperature to over 2500 K, which is required for the removal of the rock.
- the plasma jet 8 is brought to such a level of performance that the rock is predominantly sublimated, that does not melt first. It is thus largely avoided that liquid rock accumulates on the bottom 2 of the borehole 1. Liquid rock should be avoided as it can easily catch on the drill head and thus damage the drill bit. Furthermore, it can accumulate in the annular gap between the drill head and the well and there provide a blockage.
- a jacket channel 12 is formed within the drill head 4, which is arranged annularly around the plasma generating device 6. Through this jacket channel 12 flows a cooling gas flow 15, which also comes from the supply line 1 1, at high speed. This gas exits the jacket channel 12 in the vicinity of an end face 17, that is to say the downwardly pointing region of the drill head 4, and ensures that a type of gas cushion 16 is produced between the plasma gas 13 with sublimated rock and the drill head 4. This gas cushion 16 is required where the rock is in gaseous form, which is marked by the solid and provided with the reference numeral 13 line.
- a pyrometer 17 measures the temperature distribution at the Borehole 1 in the region of the drill head 4. Solid components, for example the edge of the borehole 1, have a lower temperature than liquid constituents, namely the liquefied rock 18; liquid constituents have a lower temperature than gaseous constituents. This allows the shape of the meniscus, ie the curvature of the liquid surface at the bottom 2 of the borehole 1, to be determined.
- FIG. 2a shows a meniscus with a steep outer area, which indicates a low level of liquid.
- FIG. 2b shows a meniscus with a flat outer region, which indicates a higher liquid level.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/310,042 US20170138129A1 (en) | 2014-05-15 | 2015-05-04 | Method for introducing a borehole |
MX2016014786A MX2016014786A (es) | 2014-05-15 | 2015-05-04 | Procedimiento para producir un agujero de perforacion. |
JP2017512106A JP6738321B2 (ja) | 2014-05-15 | 2015-05-04 | ボアホールを設ける方法 |
BR112016026505-0A BR112016026505B1 (pt) | 2014-05-15 | 2015-05-04 | Método para a realização de um furo de sondagem |
NZ727558A NZ727558A (en) | 2014-05-15 | 2015-05-04 | Method for introducing a borehole |
CA2948698A CA2948698C (en) | 2014-05-15 | 2015-05-04 | Method for introducing a borehole |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014106843.2 | 2014-05-15 | ||
DE102014106843.2A DE102014106843B4 (de) | 2014-05-15 | 2014-05-15 | Verfahren zum Einbringen eines Bohrlochs |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2015173049A2 true WO2015173049A2 (de) | 2015-11-19 |
WO2015173049A3 WO2015173049A3 (de) | 2016-04-28 |
Family
ID=53189017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/059707 WO2015173049A2 (de) | 2014-05-15 | 2015-05-04 | Verfahren zum einbringen eines bohrlochs |
Country Status (8)
Country | Link |
---|---|
US (1) | US20170138129A1 (de) |
JP (1) | JP6738321B2 (de) |
BR (1) | BR112016026505B1 (de) |
CA (1) | CA2948698C (de) |
DE (1) | DE102014106843B4 (de) |
MX (1) | MX2016014786A (de) |
NZ (1) | NZ727558A (de) |
WO (1) | WO2015173049A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10370903B2 (en) | 2016-01-20 | 2019-08-06 | Baker Hughes, A Ge Company, Llc | Electrical pulse drill bit having spiral electrodes |
JP7107736B2 (ja) * | 2018-05-14 | 2022-07-27 | 大成建設株式会社 | 破砕装置および破砕方法 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB761709A (en) * | 1954-07-21 | 1956-11-21 | Joseph Zionson Dalinda | Improvements in or relating to a method and machine for disintegrating a lithologic formation |
US3493050A (en) * | 1967-01-30 | 1970-02-03 | Kork Kelley | Method and apparatus for removing water and the like from gas wells |
US3467206A (en) * | 1967-07-07 | 1969-09-16 | Gulf Research Development Co | Plasma drilling |
US3443639A (en) * | 1967-11-24 | 1969-05-13 | Shell Oil Co | Method for consolidating an unconsolidated sand with a plasma jet stream |
US3556600A (en) | 1968-08-30 | 1971-01-19 | Westinghouse Electric Corp | Distribution and cutting of rocks,glass and the like |
US3818174A (en) * | 1972-11-09 | 1974-06-18 | Technology Applic Services Cor | Long arc column forming plasma generator |
US3998281A (en) * | 1974-11-10 | 1976-12-21 | Salisbury Winfield W | Earth boring method employing high powered laser and alternate fluid pulses |
US4067390A (en) * | 1976-07-06 | 1978-01-10 | Technology Application Services Corporation | Apparatus and method for the recovery of fuel products from subterranean deposits of carbonaceous matter using a plasma arc |
US4090572A (en) * | 1976-09-03 | 1978-05-23 | Nygaard-Welch-Rushing Partnership | Method and apparatus for laser treatment of geological formations |
CH643324A5 (en) * | 1981-07-27 | 1984-05-30 | Daniel Vuille | Drilling head |
US6870128B2 (en) * | 2002-06-10 | 2005-03-22 | Japan Drilling Co., Ltd. | Laser boring method and system |
DE102004041273A1 (de) * | 2004-08-23 | 2006-03-02 | Alstom Technology Ltd | Bohrvorrichtung |
US9416594B2 (en) * | 2004-11-17 | 2016-08-16 | Schlumberger Technology Corporation | System and method for drilling a borehole |
US20070267220A1 (en) * | 2006-05-16 | 2007-11-22 | Northrop Grumman Corporation | Methane extraction method and apparatus using high-energy diode lasers or diode-pumped solid state lasers |
CA2734492C (en) * | 2008-08-20 | 2016-05-17 | Foro Energy Inc. | Method and system for advancement of a borehole using a high power laser |
DE102010004609A1 (de) * | 2010-01-13 | 2011-08-25 | Smolka, Peter P., Dr., 48161 | Meisselloses Bohrsystem |
US9338667B2 (en) * | 2011-04-18 | 2016-05-10 | Empire Technology Development Llc | Drilling technology utilizing high temperature and low temperature discharges |
ES2600170T3 (es) | 2012-03-15 | 2017-02-07 | Josef Grotendorst | Procedimiento y dispositivo para introducir o excavar cavidades en una masa rocosa |
EP3656970B1 (de) * | 2012-07-05 | 2022-04-06 | Sdg Llc | Vorrichtungen und verfahren zur versorgung eines elektrozerkleinerungsbohrers mit strom |
BR102012023179A2 (pt) * | 2012-09-14 | 2014-11-11 | Roberto Nunes Szente | Processo termo mecânico para perfuração |
SK500582012A3 (sk) * | 2012-12-17 | 2014-08-05 | Ga Drilling, A. S. | Multimodálne rozrušovanie horniny termickým účinkom a systém na jeho vykonávanie |
-
2014
- 2014-05-15 DE DE102014106843.2A patent/DE102014106843B4/de not_active Expired - Fee Related
-
2015
- 2015-05-04 WO PCT/EP2015/059707 patent/WO2015173049A2/de active Application Filing
- 2015-05-04 MX MX2016014786A patent/MX2016014786A/es unknown
- 2015-05-04 NZ NZ727558A patent/NZ727558A/en not_active IP Right Cessation
- 2015-05-04 CA CA2948698A patent/CA2948698C/en active Active
- 2015-05-04 JP JP2017512106A patent/JP6738321B2/ja not_active Expired - Fee Related
- 2015-05-04 BR BR112016026505-0A patent/BR112016026505B1/pt not_active IP Right Cessation
- 2015-05-04 US US15/310,042 patent/US20170138129A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA2948698A1 (en) | 2015-11-19 |
BR112016026505B1 (pt) | 2022-04-12 |
US20170138129A1 (en) | 2017-05-18 |
MX2016014786A (es) | 2017-03-23 |
DE102014106843A1 (de) | 2015-11-19 |
WO2015173049A3 (de) | 2016-04-28 |
BR112016026505A2 (de) | 2017-08-15 |
CA2948698C (en) | 2019-02-12 |
JP6738321B2 (ja) | 2020-08-12 |
JP2017516006A (ja) | 2017-06-15 |
DE102014106843B4 (de) | 2020-09-17 |
NZ727558A (en) | 2020-05-29 |
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