ClassID:

135665

E21B43/385 - CPC Classification

Classification description:

Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells; Arrangements for separating materials produced by the well in the well by reinjecting the separated materials into an earth formation in the same well

Recent Application in this class:
#1
20260132709
2026-05-14

ESP Recirculation System with Gas Separation

#2
20250369334
2025-12-04

DOWNHOLE SAND AND GAS SEPARATOR

#3
20250369333
2025-12-04

SYSTEMS AND METHODS FOR HYDROGEN PRODUCTION FROM AN UNDERGROUND FORMATION

#4
20250341154
2025-11-06

SUBMERSIBLE PUMPING SYSTEMS WITH INTAKE MODULES HAVING TANGENTIAL FLUID INTAKE PORTS

#5
20250207492
2025-06-26

DOWNHOLE SAND AND GAS SEPARATOR

#6
20250146399
2025-05-08

DOWNHOLE SEPARATOR

#7
20250146398
2025-05-08

Increasing Hydrocarbon Recovery in a Multipurpose Well

#8
20250101849
2025-03-27

CYCLONIC SOLIDS REMOVAL UNIT FOR DOWNHOLE OIL-WATER SEPARATION (DOWS)

#9
20250084748
2025-03-13

Downhole fluid separator in a multilateral well

#10
20250067161
2025-02-27

DOWNHOLE FLUID SEPARATOR IN LATERAL OF RE-ENTRY MULTILATERAL WELL

#11
20250067150
2025-02-27

DOWNHOLE FLUID SEPARATOR DESIGN IN MULTILATERAL WELL

#12
20250052136
2025-02-13

DENSITY-BASED FLOW CONTROL CONFIGURATION, METHOD, AND SYSTEM

#13
20250003323
2025-01-02

In-Situ Hydrogen Generation and Production From Petroleum Reservoirs

#14
20240418069
2024-12-19

In-situ downhole separation for oil and gas reservoirs

#15
20240318534
2024-09-26

DOWNHOLE SEPARATION SYSTEM AND METHOD

#16
20240229631
2024-07-11

Downhole separation system and method

#17
20240183250
2024-06-06

System and method for exploiting natural gas hydrate with downhole gas-liquid synergic depressurization

#18
20240067865
2024-02-29

Treating fluid comprising hydrocarbons, water, and polymer

#19
20230374895
2023-11-23

Water separation and injection

#20
20230323193
2023-10-12

Ph control in fluid treatment

#21
20230250717
2023-08-10

Auto-correction for water cut measurements from multi-phase flowmeter in undersaturated oil wells

#22
20230193757
2023-06-22

Preventing plugging of a downhole shut-in device in a wellbore

#23
20230193735
2023-06-22

Air lifting sand

#24
20230184077
2023-06-15

Downhole phase separation in deviated wells

#25
20230014297
2023-01-19

Electric submersible pump (ESP) gas slug processor and mitigation system

#26
20220205347
2022-06-30

Oil extraction and gas production method capable of in-situ sand control and removal by downhole hydraulic lift

#27
20220170347
2022-06-02

Continuous circulating concentric casing managed equivalent circulating density (ECD) drilling for methane gas recovery from coal seams

#28
20220145157
2022-05-12

Treating fluid comprising hydrocarbons, water, and polymer

#29
20220136375
2022-05-05

Method and system for subsurface to subsurface water injection

#30
20220090480
2022-03-24

Lubricating element for drag reduction in production and transportation of water-cut heavy oil in wellbore

#31
20210395602
2021-12-23

PH control in fluid treatment

#32
20210381359
2021-12-09

Fluid and gas separator

#33
20210215030
2021-07-15

Produced water balance tool

#34
20210180440
2021-06-17

Downhole production fluid fractionation system

#35
20210040824
2021-02-11

Downhole Artificial Lift Compressor for Improving Unconventional Oil and Gas Recovery

#36
20200378235
2020-12-03

Downhole pumping system with cyclonic solids separator

#37
20200325756
2020-10-15

Continuous circulating concentric casing managed equivalent circulating density (ECD) drilling for methane gas recovery from coal seams

#38
20200291754
2020-09-17

Hydrate solid-state fluidization mining method and system under underbalanced reverse circulation condition

#39
20200284475
2020-09-10

Jet pump apparatus and methods for standing column well systems and deployment thereof

#40
20200270975
2020-08-27

System and method for low pressure gas lift artificial lift

#41
20200232310
2020-07-23

Fluid and gas separator

#42
20200123889
2020-04-23

Treating fluid comprising hydrocarbons, water, and polymer

#43
20190271221
2019-09-05

Systems, apparatuses, and methods for downhole water separation

#44
20190218900
2019-07-18

Shuttle valve assembly for gas compression and injection system

#45
20190106973
2019-04-11

Downhole centrifugal separation and removal of sand from wells using progressing cavity pump

#46
20190032465
2019-01-31

Systems, apparatuses, and methods for downhole water separation

#47
20190032464
2019-01-31

Systems, apparatuses, and methods for downhole water separation

#48
20180195375
2018-07-12

Electrical submersible pumping system with separator

#49
20180128086
2018-05-10

Continuous circulating concentric casing managed equivalent circulating density (ECD) drilling for methane gas recovery from coal seams

#50
20180087366
2018-03-29

Wellbore system

#51
20170370200
2017-12-28

BUBBLE ENHANCED DOWNHOLE OIL WATER SEPARATION

#52
20170292361
2017-10-12

System and method for extracting gas from a well

#53
20170175509
2017-06-22

Acoustic downhole oil-water separation

#54
20170167229
2017-06-15

Systems and methods for artificial lift subsurface injection and downhole water disposal

#55
20170106311
2017-04-20

Emulsion preventer for completion brines

#56
20170022797
2017-01-26

Hydrocarbon production system and an associated method thereof

#57
20170022796
2017-01-26

System and method for disposal of water produced from a plurality of wells of a well-pad

#58
20160186550
2016-06-30

Three-phase separation downhole

#59
20160138762
2016-05-19

Subsea fluid processing system and an associated method thereof

#60
20150260028
2015-09-17

Method and system for recovering oil from an oil-bearing formation

#61
20150204181
2015-07-23

Downhole oil/water separation system for improved injectivity and reservoir recovery

#62
20150159472
2015-06-11

Apparatus, systems, and methods for downhole fluid filtration

#63
20140360785
2014-12-11

Continuous circulating concentric casing managed equivalent circulating density (ECD) drilling for methane gas recovery from coal seams

#64
20140338921
2014-11-20

Method for production of hydrocarbons using caverns

#65
20140196895
2014-07-17

In situ combustion process with reduced COemissions

#66
20130313200
2013-11-28

Separation of two fluid immiscible phases for downhole applications

#67
20130292327
2013-11-07

Coalescencer separator for a mixture of immiscible phases with different specific density

#68
20130025856
2013-01-31

Dual or twin-well completion with wettability alteration for segregated oil and water production

#69
20130014944
2013-01-17

Cellular pump

#70
20120043088
2012-02-23

Method and apparatus for separating downhole hydrocarbons from water

#71
20120043072
2012-02-23

Downhole water-oil separation arrangement and method

#72
20110146977
2011-06-23

TWO-STAGE DOWNHOLE OIL-WATER SEPARATION

#73
20110079388
2011-04-07

Downhole separation and reinjection

#74
20110067874
2011-03-24

Method of redistributing well bore fluid

#75
20110056698
2011-03-10

Fluid separation system for hydrocarbon wells

#76
20110048696
2011-03-03

GAS-LIQUID SEPARATOR

#77
20110024110
2011-02-03

Three-phase separation downhole

#78
20110000675
2011-01-06

Flow control device and method for a downhole oil-water separator

#79
20100284828
2010-11-11

Gas-Driven Pumping Device and a Method for Downhole Pumping of a Liquid in a Well

#80
20100218944
2010-09-02

Downhole fluid separation

#81
20100147511
2010-06-17

Injection well surveillance system

#82
20100065267
2010-03-18

Apparatus for separating a mixture of liquids of differing specific gravities in a wellbore

#83
20100038069
2010-02-18

WELL BORE FLUID REDISTRIBUTION AND FLUID DISPOSAL

#84
20100006294
2010-01-14

Well bore fluid redistribution and fluid disposal in wellbore environments

#85
20090266755
2009-10-29

Downhole gravitational water separator

#86
20090242197
2009-10-01

Flow control system and method for downhole oil-water processing

#87
20090151559
2009-06-18

Downhole separation of carbon dioxide from natural gas produced from natural gas reservoirs

#88
20090090510
2009-04-09

Wellbore fluid redistribution and fluid disposal in wellbore environments

#89
20090056939
2009-03-05

Flow control device and method for a downhole oil-water separator

#90
20090014171
2009-01-15

Method and an apparatus for separation and injection of water from a water- and hydrocarbon-containing outflow down in a production well

#91
20080236839
2008-10-02

Controlling flows in a well

#92
20080236821
2008-10-02

Monitoring and automatic control of operating parameters for a downhole oil/water separation system

#93
20080169098
2008-07-17

Desalination method

#94
20080035336
2008-02-14

Three phase downhole separator apparatus and process

#95
20070251689
2007-11-01

Three phase downhole separator process

#96
20070089876
2007-04-26

Downhole fluid disposal apparatus and methods

#97
20060228241
2006-10-12

Gas well having water disposal pump

#98
20060186038
2006-08-24

Hydrocyclone for down-hole use

#99
20060144589
2006-07-06

Downhole separation of oil and water

#100
20060037746
2006-02-23

Downhole oil and water separator and method

#101
20060027362
2006-02-09

Three phase downhole separator process

#102
20060005972
2006-01-12

Method and system for production of gas and water from a coal seam using well bores with multiple branches during drilling and after drilling completion

#103
20050274515
2005-12-15

Method and system for producing gas and liquid in a subterranean well

#104
20050252689
2005-11-17

Multi seam coal bed/methane dewatering and depressurizing production system

#105
20050189101
2005-09-01

Downhole fluid disposal apparatus and methods

#106
20050110655
2005-05-26

RF communication with downhole equipment

#107
17341815
2021-10-12

Downhole three phase separator and method for use of same

#108
16251813
2020-03-31

Fluid and gas separator

#109
16058623
2019-04-23

Homocentric squares-shaped well structure for marine hydrate reserve recovery utilizing geothermal heat and method thereof