Patents-Review.com
ClassID:

135634 ⎘

E21B43/20 - page 3 - 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 Displacing by water

Recent Application in this class:
#601
20080173440
2008-07-24

SYSTEM FOR INJECTING WATER, COLLECTED FROM A SUBTERRANEAN AQUIFER, INTO AN OIL RESERVOIR

 #602
20080169098
2008-07-17

Desalination method

 #603
20080046223
2008-02-21

Method of optimizing enhanced recovery of a fluid in place in a porous medium by front tracking

 #604
20070284100
2007-12-13

Scale inhibition method

 #605
20070246426
2007-10-25

Water flooding method

 #606
20070215344
2007-09-20

Inhibiting reservoir souring using a treated injection water

 #607
20070151728
2007-07-05

Method to detect low salinity injection water encroachment into oil formations

 #608
20070090039
2007-04-26

Apparatus and method for treating injection fluid

 #609
20070086906
2007-04-19

Surface pump assembly

 #610
20070068674
2007-03-29

Toe-to-heel waterflooding with progressive blockage of the toe region

 #611
20070039732
2007-02-22

Methods and compositions for improving hydrocarbon recovery by water flood intervention

 #612
20070000663
2007-01-04

Enhanced liquid hydrocarbon recovery by miscible gas injection water drive

 #613
20060254765
2006-11-16

Biogenic fuel gas generation in geologic hydrocarbon deposits

 #614
20060243670
2006-11-02

Method and apparatus for treatment of water for an injection well

 #615
20060224369
2006-10-05

Performance prediction method for hydrocarbon recovery processes

 #616
20060157241
2006-07-20

System for injecting water, collected from subterranean aquifers and injector wells, into oil reservoirs

 #617
20060122777
2006-06-08

Waterflood control system for maximizing total oil recovery

 #618
20060118305
2006-06-08

Hydrocarbon sweep into horizontal transverse fractured wells

 #619
20060060543
2006-03-23

System and method for the removal of particulates from water

 #620
20050038603
2005-02-17

System and method for real time reservoir management

 #621
20050023222
2005-02-03

Filtration apparatus and method

 #622
20050012036
2005-01-20

Providing a light cell in a wellbore

 #623
18443563
2025-07-01

Advanced waterflooding methods for enhanced hydrocarbon recovery

 #624
18428077
2024-06-04

Chemical enhanced hydrocarbon recovery

 #625
18339274
2024-11-19

Method of enhancing oil recovery using citric acid-based additive

 #626
17949626
2023-12-05

Super-cooling injection fluid

 #627
17823271
2024-03-05

Chemical enhanced hydrocarbon recovery

 #628
17480734
2023-01-31

Oil recovery of a reservoir based on residual oil saturation

 #629
17132480
2021-10-26

Composition for oil and gas recovery

 #630
16058332
2021-01-19

Surface blocking agents

 #631
16043595
2019-05-14

Shale inhibitor and preparation method thereof, water-based drilling fluid, and shale gas drilling and extraction method

 #632
15723818
2019-04-09

Method for preventing formation of water-oil emulsions using additives

 #633
15618890
2019-10-29

Reduced-physics, data-driven secondary recovery optimization

 #634
15299828
2018-04-17

Petroleum reservoir operation using geotechnical analysis

 #635
15052646
2020-03-03

Systems and methods for analyzing resource production

 #636
14636853
2017-05-30

Water solution system

 #637
12268408
2014-10-21

Drag-reducing copolymer compositions