WO2014088440A1 - A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds - Google Patents
A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds Download PDFInfo
- Publication number
- WO2014088440A1 WO2014088440A1 PCT/RU2012/001008 RU2012001008W WO2014088440A1 WO 2014088440 A1 WO2014088440 A1 WO 2014088440A1 RU 2012001008 W RU2012001008 W RU 2012001008W WO 2014088440 A1 WO2014088440 A1 WO 2014088440A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- well
- horizontal end
- horizontal
- beds
- bed
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229930195733 hydrocarbon Natural products 0.000 title claims description 11
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 11
- 239000004215 Carbon black (E152) Substances 0.000 title claims description 7
- 239000002184 metal Substances 0.000 claims abstract description 6
- 230000035939 shock Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000004880 explosion Methods 0.000 claims description 2
- 230000004941 influx Effects 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000001902 propagating effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 5
- 230000009545 invasion Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/003—Vibrating earth formations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/157—Generating seismic energy using spark discharges; using exploding wires
Definitions
- the invention relates to the oil and gas industry and is used to intensify the influx of oil, natural gas, coal gas (methane), and shale gas by initiating physical fields by an apparatus having a combustible calibrated metal wire and placed in the horizontal end of a vertical-inclined well.
- acid treatment of a horizontal well helps penetrate deep into the bed in an area only a few meters long, while the positive part of the interval remains clogged with mechanical impurities or drilling mud, or other deposits resulting from drilling, development, and operation.
- Prior art methods apply physical fields to the well bottom zone of vertical wells by generating depressurizing-repressuring pulses (Patents RU 2276722 CI , 2006; RU 2310059 CI, 2007; and RU 2373386 CI , 2009). These methods, however, cannot be used in the horizontal end of a well because of the size of the equipment, structural specifics, and specifics of delivery of the equipment into the horizontal bore of a well.
- Prior art patents teach methods for intensifying the influx of hydrocarbons by various hydraulic bed fracturing (HBF) techniques (Patents RU 2278955, CI E 21 B 43/16, E 21 B 43/27, 2006; RU 2442886, 2012).
- the claimed method for intensifying influx of hydrocarbons into the horizontal end of a well is intended to demud the specific working interval of the bit shank and to involve the poorly drained stagnation zones and seams passed up previously so as to operate a well with maximum efficiency and make it absolutely environment friendly without using hydraulic bed fracturing or acid baths at all stages of operation, beginning with development.
- the claimed method can be used to stimulate the flow repeatedly for as long as well operation remains economically profitable.
- FIG. 2 is a view of a well plasma pulse generator, wherein 14 is an NKB-3-36 cable tip; 15 is a control and telemetry unit; 16 is an energy storage battery; 17 is a vibrator; 18 is a feeder housing; and 19 is a centering device; and FIG. 3 shows a basic diagram of a special hoist, wherein 20 is a vehicle (undercarriage); 21 is a drum; 22 is a flexible pipe; 23 is a drum drive; 24 is a wellhead feeder; 25 is a wellhead feeder drive; 26 is blowout prevention equipment; 27 is a production tree; 28 is a sealing device; and 29 is an operator's cab equipped with a control system.
- 20 is a vehicle (undercarriage); 21 is a drum; 22 is a flexible pipe; 23 is a drum drive; 24 is a wellhead feeder; 25 is a wellhead feeder drive; 26 is blowout prevention equipment; 27 is a production tree; 28 is a sealing device; and 29 is an operator's cab equipped with
- the claimed method is performed as follows: a flexible pipe of the coil tubing type is used to lower into the horizontal end of a well an apparatus generating short periodic directed pulses produced by explosion of calibrated wire to form plasma and a high-pressure radial shock wave.
- the apparatus comprises a battery of storage capacitors placed in a round metal container connected to a control module and wellhead equipment to transmit the charge and discharge of the storage capacitors for actuating the apparatus to generate a sequence of elastic vibrations at specified points of the horizontal end.
- the operator sends a signal to discharge the capacitor battery through calibrated wire closing the electrodes to produce periodic high-pressure pulses that demud the well bottom zone and increase the permeability of the missed stagnation zones, making it possible to recover hydrocarbons from the productive bed with maximum efficiency along the full length of the horizontal end.
- the horizontal end must have a minimum internal diameter of at least 75 mm;
- the casing string must be fluid-proof
- - the well must be flushed, with destructor added to the flushing fluid, in need; and - production tree equipment must have through sections of at least 75 mm. Through openings 75 mm large allow essential production equipment to be lowered into a well.
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)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to the oil and gas industry and is used to intensify oil influx. The method comprises delivering and positioning in the horizontal end of a well an apparatus provided with an electric energy storage battery, a vibrator having two electrodes closed by calibrated metal wire on signal from the operator to cause said wire to explode and produce a high-pressure directed pointed shock wave propagating radially from designated points of the horizontal bore of said well in order to increase permeability of the well bottom zone of the working lengths of the horizontal bore. The invention allows an inclined well with a horizontal end to be operated efficiently without harming the environment in the least.
Description
A Method for Applying Physical Fields of an Apparatus in the Horizontal End of an Inclined Well to Productive Hydrocarbon Beds.
The invention relates to the oil and gas industry and is used to intensify the influx of oil, natural gas, coal gas (methane), and shale gas by initiating physical fields by an apparatus having a combustible calibrated metal wire and placed in the horizontal end of a vertical-inclined well.
The design of wells has rapidly become more complicated in the oil and gas industry in this century. The wells are becoming more inclined and have a horizontal end in order to increase the drainage area of a productive bed. It is believed that a well having a horizontal end may have a larger area of contact with the hydrocarbon bed and increase the recovery ratio of hydrocarbons from the well and the intake capacity of the well. Construction, development, operation, and intensification of hydrocarbon influx differ significantly from hydrocarbon recovery in vertical wells, for which reason the methods used to intensify influx in vertical wells are unsuited, in their great majority, for horizontal wells.
For example, acid treatment of a horizontal well helps penetrate deep into the bed in an area only a few meters long, while the positive part of the interval remains clogged with mechanical impurities or drilling mud, or other deposits resulting from drilling, development, and operation.
Prior art methods apply physical fields to the well bottom zone of vertical wells by generating depressurizing-repressuring pulses (Patents RU 2276722 CI , 2006; RU 2310059 CI, 2007; and RU 2373386 CI , 2009). These methods, however, cannot be used in the horizontal end of a well because of the size of the equipment, structural specifics, and specifics of delivery of the equipment into the horizontal bore of a well.
Prior art patents teach methods for intensifying the influx of hydrocarbons by various hydraulic bed fracturing (HBF) techniques (Patents RU 2278955, CI E 21 B 43/16, E 21 B 43/27, 2006; RU 2442886, 2012). These techniques, though, are very complicated and costly, require careful preliminary preparation of the process and well to meet rigid demands on the choice of wells for HBF to be used because of the geological specifics of deposits and location of wells on the terrain, and can only succeed when all technical and technological conditions are met (bed thickness, significant distance from the vertical-inclined string and horizontal inclined string, significant bed separation, specific choice of fracturing and killing fluids, bed anisotropy, and authentic information about permeability), but frequently ignored in oil production, or available information is not sufficient for designing the setup. Not infrequently, HBF attempts cause invasion of stratal water and premature well flooding.
It is common knowledge that horizontal end drilling disrupts the collecting properties of the well bottom zone of the bed, including:
-invasion of some drilling mud into the bed;
- invasion of drilling mud into the bed by filtration;
- invasion of cement into the bed by filtration;
- destruction of perforations and consolidation of the parent material;
- invasion of mechanical impurities in the completion fluid or killing fluid into the bed or clogging of perforations thereby;
- invasion of the killing fluid or well completion fluid into the bed;
- sealing of the bed by native clays;
- deposition of paraffins and asphaltenes in the bed or in perforations;
- deposition of salts in the bed or perforations;
- formation or injection of emulsions in the bed; and
- injection of solvents containing mechanical impurities.
All these deficiencies cause reduction in the permeability of the well bottom zone and, therefore, in productivity, frequently by more than 60% of design permeability, and in the worst cases, when damage is caused to a great depth, they lead to complete termination of production from the well.
The claimed method for intensifying influx of hydrocarbons into the horizontal end of a well is intended to demud the specific working interval of the bit shank and to involve the poorly drained stagnation zones and seams passed up previously so as to operate a well with maximum efficiency and make it absolutely environment friendly without using hydraulic bed fracturing or acid baths at all stages of operation, beginning with development. When the well yield declines during operation, the claimed method can be used to stimulate the flow repeatedly for as long as well operation remains economically profitable.
These results are achieved by performing a method for engaging productive hydrocarbon beds through the horizontal end of an inclined well, said method comprising lowering into said horizontal end an apparatus generating short periodic directed pulses by exploding calibrated metal wire and forming plasma and a high-pressure shock wave, and further having a battery of storage capacitors placed in a round metal container of an outer diameter between 42 mm and 55 mm and connected to a control module and equipment at the wellhead in order to initiate a sequence of elastic vibrations at specified points of the horizontal end. The number of pulses and pitch along the horizontal line of the vibrator depend on the geological and technical characteristics and geophysical parameters of the well.
The claimed invention is illustrated in the following drawings: FIG. 1 is a view of a horizontal well with a device, wherein: 1 is an apparatus having a container for collecting well fluid; 2 is an operation string of D=146 mm; 3 are tubing string pipes of D=73 mm; 4 is a tubing string funnel; 5 is a shank of D=102 mm; 6 is a flexible pipe; 7 is a geophysical cable; 8 is a tubing sub with a mandrel and a circulation check valve; 9 is a cable head; 10 is a geophysical device (perforator); 1 1 is an autonomous device; 12 is a P S 5T hoist; and 13 is a nitrogen compressor station; FIG. 2 is a view of a well plasma pulse generator, wherein 14 is an NKB-3-36 cable tip; 15 is a control and telemetry unit; 16 is an energy storage battery; 17 is a vibrator; 18 is a feeder housing; and 19 is a centering device; and FIG. 3 shows a basic diagram of a special hoist, wherein 20 is a vehicle (undercarriage); 21 is a drum; 22 is a flexible pipe; 23 is a drum drive; 24 is a wellhead feeder; 25 is a wellhead feeder drive; 26 is blowout prevention equipment; 27 is a production tree; 28 is a sealing device; and 29 is an operator's cab equipped with a control system.
The claimed method is performed as follows: a flexible pipe of the coil tubing type is used to lower into the horizontal end of a well an apparatus generating short periodic directed pulses produced by explosion of calibrated wire to form plasma and a high-pressure radial shock wave. The apparatus comprises a battery of storage capacitors placed in a round metal container connected to a control module and wellhead equipment to transmit the charge and discharge of the storage capacitors for actuating the apparatus to generate a sequence of elastic vibrations at specified points of the horizontal end.
To carry out the claimed method, there is a need, nonexistent during operation of a vertical well where the apparatus is simply lowered, to push forward the apparatus with a measured force. For this purpose, use is made of a flexible pipe of the coil tubing type to lower tubing strings wound on a
drum mounted on a specialized truck undercarriage into the well. A flexible pipe provided with a special-purpose tip engaging the hinge of the apparatus head secures the apparatus provided with a centering device and pushes the apparatus into the horizontal bore of the well to a desired depth, the axial pressure being monitored by a pressure sensor to avoid an accident and sensor readings being transmitted to the control module. The working intervals of the horizontal end are determined in advance by geophysical equipment that sets marks on the screen of the control module. As the designated points are reached in the horizontal end, the operator sends a signal to discharge the capacitor battery through calibrated wire closing the electrodes to produce periodic high-pressure pulses that demud the well bottom zone and increase the permeability of the missed stagnation zones, making it possible to recover hydrocarbons from the productive bed with maximum efficiency along the full length of the horizontal end.
For the claimed method to be used efficiently, the well is to meet the following criteria:
- the horizontal end must have a minimum internal diameter of at least 75 mm;
- the casing string must be fluid-proof;
- the tubing string lift must be raised;
- the well must be flushed, with destructor added to the flushing fluid, in need; and - production tree equipment must have through sections of at least 75 mm.
Through openings 75 mm large allow essential production equipment to be lowered into a well.
The invention has been disclosed above with reference to a particular embodiment thereof. It may be obvious to persons skilled in the art to use other embodiments of the invention without departing from the idea thereof as it has been disclosed above. Accordingly, the disclosure of this invention may be considered limited in scope by the claim following hereafter.
Claims
CLAIM
A method for applying a physical field to productive hydrocarbon beds through a horizontal end of an inclined well, said method comprising lowering into the horizontal end on a flexible pipe of the coil tubing type an apparatus generating short periodic directed pulses produced by explosion of calibrated wire, forming plasma and a high-pressure radially directed shock wave, and further having a battery of storage capacitors placed in a round metal container and connected to a control module and wellhead equipment to transmit the charge and discharge of said storage capacitors to actuate said apparatus for generating a sequence of elastic vibrations at designated points of the horizontal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2012/001008 WO2014088440A1 (en) | 2012-12-03 | 2012-12-03 | A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2012/001008 WO2014088440A1 (en) | 2012-12-03 | 2012-12-03 | A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014088440A1 true WO2014088440A1 (en) | 2014-06-12 |
Family
ID=50883754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2012/001008 WO2014088440A1 (en) | 2012-12-03 | 2012-12-03 | A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2014088440A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772595A (en) * | 2016-12-05 | 2017-05-31 | 中国矿业大学 | A kind of method that detonator time delay is eliminated in shock wave Velocity Inversion for colliery |
| CN107178348A (en) * | 2017-07-03 | 2017-09-19 | 中国石油大学(北京) | Discharge-induced explosion plasma oil output instrument |
| CN110541727A (en) * | 2019-09-20 | 2019-12-06 | 西安闪光能源科技有限公司 | coal bed gas ground treatment method |
| CN111121867A (en) * | 2019-12-18 | 2020-05-08 | 天津耀通科技股份有限公司 | Be applied to production tree's intelligent protection terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3583766A (en) * | 1969-05-22 | 1971-06-08 | Louis R Padberg Jr | Apparatus for facilitating the extraction of minerals from the ocean floor |
| RU2228901C2 (en) | 2002-01-09 | 2004-05-20 | Институт нефтехимического синтеза им. А.В. Топчиева РАН | Synthesis gas production process |
| RU2248591C2 (en) * | 2003-01-04 | 2005-03-20 | ООО " Импортно-экспортная торгово-промышленная фирма "Рост" | Borehole source of elastic vibrations |
| RU2274600C1 (en) | 2004-09-03 | 2006-04-20 | ООО "Центр КОРТЭС" | Multistage synthesis gas generation process |
| RU2282026C1 (en) * | 2004-12-16 | 2006-08-20 | Николай Михайлович Пелых | Thermogaschemical well stimulation method with the use of coiled tubing |
| RU2381175C2 (en) | 2007-11-30 | 2010-02-10 | Общество С Ограниченной Ответственностью "Центр Кортэс" | Method for production of hydrogen-methane mixture |
-
2012
- 2012-12-03 WO PCT/RU2012/001008 patent/WO2014088440A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3583766A (en) * | 1969-05-22 | 1971-06-08 | Louis R Padberg Jr | Apparatus for facilitating the extraction of minerals from the ocean floor |
| RU2228901C2 (en) | 2002-01-09 | 2004-05-20 | Институт нефтехимического синтеза им. А.В. Топчиева РАН | Synthesis gas production process |
| RU2248591C2 (en) * | 2003-01-04 | 2005-03-20 | ООО " Импортно-экспортная торгово-промышленная фирма "Рост" | Borehole source of elastic vibrations |
| RU2274600C1 (en) | 2004-09-03 | 2006-04-20 | ООО "Центр КОРТЭС" | Multistage synthesis gas generation process |
| RU2282026C1 (en) * | 2004-12-16 | 2006-08-20 | Николай Михайлович Пелых | Thermogaschemical well stimulation method with the use of coiled tubing |
| RU2381175C2 (en) | 2007-11-30 | 2010-02-10 | Общество С Ограниченной Ответственностью "Центр Кортэс" | Method for production of hydrogen-methane mixture |
Non-Patent Citations (1)
| Title |
|---|
| MOLCHANOV A. A.: "Plazmenno-impulsnoe vozdeistvie na neftyanuyu zalezh kak na mnogofaktornuyu dinamicheskuyu dissipativnuyu sistemu.", NAUCHNO-TEKHNICHESKY VESTNIK. KAROTAZHNIK, #200, TVER, 2011, pages 94 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772595A (en) * | 2016-12-05 | 2017-05-31 | 中国矿业大学 | A kind of method that detonator time delay is eliminated in shock wave Velocity Inversion for colliery |
| CN107178348A (en) * | 2017-07-03 | 2017-09-19 | 中国石油大学(北京) | Discharge-induced explosion plasma oil output instrument |
| CN107178348B (en) * | 2017-07-03 | 2019-05-21 | 中国石油大学(北京) | Discharge-induced explosion plasma oil output tool |
| CN110541727A (en) * | 2019-09-20 | 2019-12-06 | 西安闪光能源科技有限公司 | coal bed gas ground treatment method |
| CN110541727B (en) * | 2019-09-20 | 2021-05-04 | 西安闪光能源科技有限公司 | Coal bed gas ground treatment method |
| CN111121867A (en) * | 2019-12-18 | 2020-05-08 | 天津耀通科技股份有限公司 | Be applied to production tree's intelligent protection terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9284805B2 (en) | Method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds | |
| US20190128080A1 (en) | Apparatus and method for pumping fluid in a borehole | |
| CN105840166B (en) | A kind of fractured horizontal well gas testing well-completing process using complete dissolvable bridge plug | |
| RU2558058C1 (en) | Interval hydraulic fracturing of carbonate formation in horizontal wellbore with bottom water | |
| RU2460876C1 (en) | Method for performing pulse hydraulic fracturing of carbonate formation | |
| RU2011129976A (en) | METHOD FOR INCREASING EFFICIENCY OF PUMPING AND INTENSIFICATION OF OIL AND GAS PRODUCTION | |
| RU2612061C1 (en) | Recovery method of shale carbonate oil field | |
| RU2634134C1 (en) | Method of interval multistage hydraulic fracturing of formation in oil and gas wells | |
| WO2014088440A1 (en) | A method for applying physical fields of an apparatus in the horizontal end of an inclined well to productive hydrocarbon beds | |
| CN104879110B (en) | Sub-clustering perforation staged fracturing combination operation process | |
| US10914156B2 (en) | Frac pulser system and method of use thereof | |
| RU2612060C9 (en) | Method of development of carbonate shaly oil deposits | |
| US11572766B2 (en) | Waveform energy generation systems and methods of enhancing matrix permeability in a subsurface formation | |
| CN106593387A (en) | Sectional multi-cluster fracturing method of horizontal well | |
| RU2592582C1 (en) | Method of hydraulic fracturing | |
| CN112431579B (en) | Preset small-diameter pipe internal fracturing device and method for side drilling well and small-hole well | |
| CN104863550B (en) | Hydraulic jet perforation and APR testing combination operation technique | |
| RU105476U1 (en) | Borehole Source of Seismic Energy (OPTIONS) | |
| RU2613403C1 (en) | Method for hydraulic fracturing of formation in horizontal shaft of well | |
| CN113431543A (en) | Multi-pulse CO2Gas treatment method for fractured coal seam | |
| CN107066651A (en) | A kind of oil well excitement and groundwater prospecting method and the application of monitoring water injection well pressure-responsive | |
| CN202250016U (en) | Hydrojet staged fracturing tool | |
| CN202441355U (en) | Staged fracturing tool of U type oil-gas well | |
| CN216008469U (en) | Turning radial well device | |
| RU2562639C1 (en) | Method of secondary drilling of productive formations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12889571 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 12889571 Country of ref document: EP Kind code of ref document: A1 |