ClassID:

135643

E21B43/247 - CPC Classification

Classification description:

Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells; Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection; Combustion in association with fracturing processes or crevice forming processes

Sub-classes:
Recent Application in this class:
#1
20250207485
2025-06-26

METHODS OF GENERATING HYDROGEN IN HIGH-TEMPERATURE, TIGHT SUBTERRANEAN FORMATIONS

#2
20240093648
2024-03-21

METHODS AND SYSTEMS FOR SUPPLYING FUEL TO GAS TURBINE ENGINES

#3
20240044232
2024-02-08

System and method for enhanced geothermal energy extraction

#4
20230383627
2023-11-30

WELL FRACTURING MANIFOLD APPARATUS

#5
20230212992
2023-07-06

Methods and systems for supplying fuel to gas turbine engines

#6
20220325604
2022-10-13

Well tools with components formed from pyrolytically degradable materials

#7
20220282598
2022-09-08

In-situ methane explosion shaped charge perforating device with molecular sieve

#8
20220112797
2022-04-14

Simulfrac pulsed treatment

#9
20220018229
2022-01-20

Well fracturing manifold apparatus

#10
20210148205
2021-05-20

Method for extracting gas by fracturing coal seam through combination of hydraulic slotting and multi-stage combustion impact wave

#11
20210095601
2021-04-01

Methods and systems for supplying fuel to gas turbine engines

#12
20200400002
2020-12-24

Sliced and elliptical head probe for plasma blast applications

#13
20200347713
2020-11-05

Monitoring health of additive systems

#14
20200325758
2020-10-15

System and method to evaluate kerogen-rich shale

#15
20200217177
2020-07-09

Well fracturing manifold apparatus

#16
20200088018
2020-03-19

In situ SRF cavity processing using optical ionization of gases

#17
20200032633
2020-01-30

Electrically controlled propellant materials for subterranean zonal isolation and diversion

#18
20190353032
2019-11-21

Laser tool

#19
20190249533
2019-08-15

Energetic charge for propellant fracturing

#20
20190040725
2019-02-07

METHOD FOR EXTRACTING HYDROCARBONS USING EXOTHERMIC GAS GENERATING CHEMICAL REACTIONS FRACTURING THE ROCK FORMATION

#21
20180298735
2018-10-18

Well fracturing manifold apparatus

#22
20180156018
2018-06-07

THE METHOD OF EXTRACTING HYDROCARBONS FROM A SHALE GAS DEPOSIT AND A DEVICE FOR EXTRACTING HYDROCARBONS FROM A SHALE GAS DEPOSIT

#23
20180087363
2018-03-29

Use of energetic events and fluids to fracture near wellbore regions

#24
20180030333
2018-02-01

Fracture having a bottom portion of reduced permeability and a top portion having a higher permeability

#25
20180010434
2018-01-11

Stimulation of light tight shale oil formations

#26
20180003004
2018-01-04

Multi-zone fracturing with full wellbore access

#27
20170306737
2017-10-26

Formation fracture flow monitoring

#28
20170292357
2017-10-12

Methods, systems, and computer-readable media for evaluating service companies, identifying candidate wells and designing hydraulic refracturing

#29
20170226842
2017-08-10

MONITORING HEALTH OF ADDITIVE SYSTEMS

#30
20170191357
2017-07-06

Methods and compositions for suppressing bacterial growth in a subterranean environment

#31
20170130567
2017-05-11

Fracturing treatment of subterranean formations using shock waves

#32
20160298431
2016-10-13

Well fracturing manifold apparatus

#33
20160084059
2016-03-24

Methods and apparatus for downhole propellant-based stimulation with wellbore pressure containment

#34
20160076350
2016-03-17

Method and process for extracting shale oil and gas by fracturing and chemical retorting in oil shale in-situ horizontal well

#35
20160045888
2016-02-18

Pulse jet system and method

#36
20160040519
2016-02-11

System and method for facilitating subterranean hydrocarbon extraction with electrochemical processes

#37
20150354859
2015-12-10

Method for a radiator EGS to harvest geothermal energy

#38
20150300127
2015-10-22

Device and method for well stimulation

#39
20150247394
2015-09-03

METHOD FOR FRACTURE COMMUNICATION, PASSAGE PROCESSING, AND UNDERGROUND GASIFICATION OF UNDERGROUND CARBON-CONTAINING ORGANIC MINERAL RESERVOIR

#40
20150247385
2015-09-03

METHOD FOR JOINT-MINING OF COALBED GAS AND COAL

#41
20150144337
2015-05-28

Waste heat recovery from depleted reservoir

#42
20150068749
2015-03-12

Method, apparatus, and composition for increased recovery of hydrocarbons by paraffin and asphaltene control from reaction of fuels and selective oxidizers in the subterranean environment

#43
20150007998
2015-01-08

Integral fracturing manifold

#44
20150007997
2015-01-08

Well fracturing systems and methods

#45
20140352957
2014-12-04

Oil shale exploitation method

#46
20140326450
2014-11-06

Pneumatic fracturing method and system for exploiting shale gas

#47
20140262249
2014-09-18

Hydraulic fracturing with exothermic reaction

#48
20140238678
2014-08-28

Method and apparatus for ballistic tailoring of propellant structures and operation thereof for downhole stimulation

#49
20140054032
2014-02-27

In situ retorting and refining of hygrocarbons

#50
20130175038
2013-07-11

Integral fracturing manifold

#51
20130081811
2013-04-04

In situ fluid reservoir stimulation process

#52
20130008660
2013-01-10

In situ recovery from a hydrocarbon containing formation

#53
20120321528
2012-12-20

Pulse jet water desalination and purification

#54
20120247774
2012-10-04

Slow release breaker treatment fluids and their associated methods of use

#55
20110146982
2011-06-23

Enhanced convection for in situ pyrolysis of organic-rich rock formations

#56
20110088904
2011-04-21

In situ recovery from a hydrocarbon containing formation

#57
20100319909
2010-12-23

Enhanced Shale Oil Production By In Situ Heating Using Hydraulically Fractured Producing Wells

#58
20100282460
2010-11-11

Converting organic matter from a subterranean formation into producible hydrocarbons by controlling production operations based on availability of one or more production resources

#59
20100270038
2010-10-28

Kerogen extraction from subterranean oil shale resources

#60
20100270015
2010-10-28

In situ thermal processing of an oil shale formation

#61
20100218946
2010-09-02

Water treatment following shale oil production by in situ heating

#62
20100212904
2010-08-26

IN SITU FLUID RESERVOIR STIMULATION PROCESS

#63
20090145598
2009-06-11

Optimization of untreated oil shale geometry to control subsidence

#64
20090126934
2009-05-21

Kerogen extraction from subterranean oil shale resources

#65
20090101346
2009-04-23

In situ recovery from a hydrocarbon containing formation

#66
20080314593
2008-12-25

In situ thermal processing of an oil shale formation containing carbonate minerals

#67
20080190606
2008-08-14

In-situ method of producing oil shale, on-shore and off-shore

#68
20080087428
2008-04-17

Enhanced shale oil production by in situ heating using hydraulically fractured producing wells

#69
20080006410
2008-01-10

Kerogen extraction from subterranean oil shale resources

#70
20070295503
2007-12-27

In-situ method of coal gasification

#71
20070235187
2007-10-11

Low temperature oxidation for enhanced oil recovery

#72
20070199701
2007-08-30

EHANCED HYDROCARBON RECOVERY BY IN SITU COMBUSTION OF OIL SAND FORMATIONS

#73
20070199700
2007-08-30

ENHANCED HYDROCARBON RECOVERY BY IN SITU COMBUSTION OF OIL SAND FORMATIONS

#74
20070107901
2007-05-17

In-situ method of fracturing gas shale and geothermal areas

#75
20070089879
2007-04-26

In-situ method of producing oil shale, on-shore and off-shore

#76
20060213658
2006-09-28

In-situ method of coal gasification

#77
20060213657
2006-09-28

In situ thermal processing of an oil shale formation using a pattern of heat sources

#78
20050252656
2005-11-17

In-situ method of producing oil shale and gas (methane) hydrates, on-shore and off-shore

#79
20050051328
2005-03-10

Burn assisted fracturing of underground coal bed

#80
15885075
2019-02-12

Methods for recovering light hydrocarbons from brittle shale using micro-fractures and low-pressure steam

#81
15388822
2017-05-30

Methods for recovering light hydrocarbons from shale using thermally-induced microfractures

#82
14850029
2017-01-31

Methods for recovering hydrocarbons from shale using thermally-induced microfractures