ClassID:

135618

E21B43/122 - page 2 - CPC Classification

Classification description:

Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells; Methods or apparatus for controlling the flow of the obtained fluid to or in wells; Lifting well fluids Gas lift

Recent Application in this class:
#301
20120024603
2012-02-02

APPARATUS FOR A PIPE STRING OF A GEOLOGICAL DRILL HOLE, PIPE STRING, METHOD FOR OPERATING A GEOLOGICAL DRILLING GEAR AND METHOD FOR PRODUCING A PIPE STRING FOR A GEOLOGICAL DRILL HOLE

#302
20120000668
2012-01-05

System and method for producing hydrocarbons from a well

#303
20110278015
2011-11-17

System and method for production of reservoir fluids

#304
20110272148
2011-11-10

Methods, systems and apparatus for coiled tubing testing

#305
20110209879
2011-09-01

System and methods for removing fluids from a subterranean well

#306
20110209870
2011-09-01

Gas flow system

#307
20110168413
2011-07-14

System and method for optimizing production in gas-lift wells

#308
20110168399
2011-07-14

MID WATER GAS LIFT

#309
20110146999
2011-06-23

Method and Apparatus for Dewatering Using Methane

#310
20110139461
2011-06-16

Assembly for use in a Christmas tree

#311
20110132593
2011-06-09

Bypass gaslift system, apparatus, and method for producing a multiple zones well

#312
20110067876
2011-03-24

Method and apparatus for injecting fluid in a wellbore

#313
20110042097
2011-02-24

Apparatus, assembly and process for injecting fluid into a subterranean well

#314
20110024131
2011-02-03

Method for recovering oil from an oil well

#315
20100307765
2010-12-09

METHOD FOR USING ACID GAS AS LIFT-GAS AND TO ENHANCE OIL RECOVERY FROM A SUBSURFACE FORMATION

#316
20100294506
2010-11-25

Systems and methods for deliquifying a commingled well using natural well pressure

#317
20100288506
2010-11-18

Method for controlling a hydrocarbons production installation

#318
20100284828
2010-11-11

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

#319
20100270223
2010-10-28

Methods and apparatus for enhancing venturi suction in eductor mixers

#320
20100252271
2010-10-07

Total in place hydrocarbon recovery by isolated liquid and gas production through expanded volumetric wellbore exposure +

#321
20100236789
2010-09-23

System and method for producing a well using a gas

#322
20100198533
2010-08-05

Gas lift well surveillance

#323
20100186968
2010-07-29

Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation

#324
20100116491
2010-05-13

System and method for producing a well using a gas

#325
20100089464
2010-04-15

FLYING VALVE FOR FREE PISTON

#326
20100051288
2010-03-04

Low rate gas injection system

#327
20100051267
2010-03-04

Gas flow system

#328
20100042458
2010-02-18

Methods and systems for performing oilfield production operations

#329
20100038078
2010-02-18

Down-hole liquid level control for hydrocarbon wells

#330
20100032153
2010-02-11

Bypass gas lift system for producing a well

#331
20090272129
2009-11-05

Method and cooling system for electric submersible pumps/motors for use in geothermal wells

#332
20090266554
2009-10-29

Smart compressed chamber well optimization system

#333
20090255684
2009-10-15

System and method for thru tubing deepening of gas lift

#334
20090229831
2009-09-17

Gas lift system

#335
20090198478
2009-08-06

Oilfield emulator

#336
20090194293
2009-08-06

Apparatus, assembly and process for injecting fluid into a subterranean well

#337
20090194277
2009-08-06

Single trip tubing punch and setting tool

#338
20090188665
2009-07-30

Monitoring of downhole parameters and tools utilizing fiber optics

#339
20090151954
2009-06-18

Subsea hydraulic and pneumatic power

#340
20090151953
2009-06-18

Submersible pump with surfactant injection

#341
20090145595
2009-06-11

Gas assisted downhole pump

#342
20090114450
2009-05-07

Controlled variable density fluid for wellbore operations

#343
20090114383
2009-05-07

Gas lift apparatus for flushing and snubbing well

#344
20090095467
2009-04-16

Bypass gas lift system and method for producing a well

#345
20090084548
2009-04-02

Recovery of hydrocarbons

#346
20090038806
2009-02-12

ACCUMULATION AND RECYCLING OF CAPTURED GAS IN RECOVERY OF SUBTERRANEAN FLUIDS

#347
20080271893
2008-11-06

Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation

#348
20080271882
2008-11-06

Controlled gas-lift heat exchange compressor

#349
20080257556
2008-10-23

Non-aqueous foam composition for gas lift injection and methods for making and using same

#350
20080202763
2008-08-28

Method to Optimize Production from a Gas-lifted Oil Well

#351
20080179063
2008-07-31

CHEMICALLY ENHANCED GAS-LIFT FOR OIL AND GAS WELLS

#352
20080173455
2008-07-24

Ported velocity tube for gas lift operations

#353
20080164034
2008-07-10

Hydrocarbon production system and method of use

#354
20080164033
2008-07-10

Gas well de-watering apparatus and method

#355
20080154564
2008-06-26

Method for optimal lift gas allocation

#356
20080140369
2008-06-12

Method for performing oilfield production operations

#357
20080006571
2008-01-10

Method and apparatus for treatment of wastewater employing membrane bioreactors

#358
20080000642
2008-01-03

Wireline slip hanging bypass assembly and method

#359
20070276542
2007-11-29

System and method for optimization of gas lift rates on multiple wells

#360
20070275471
2007-11-29

System and method for multivariable control in three-phase separation oil and gas production

#361
20070246222
2007-10-25

Method for recovering oil from a gas-lifted oil well penetrating a subterranean oil-bearing formation

#362
20070235197
2007-10-11

Gas lift chamber purge and vent valve and pump systems

#363
20070231158
2007-10-04

Artificial lift with additional gas assist

#364
20070151763
2007-07-05

Drilling system and method

#365
20070114038
2007-05-24

Well production by fluid lifting

#366
20070114023
2007-05-24

Gas lift flow surveillance device

#367
20070079963
2007-04-12

Process for foaming a wet hydrocarbon composition

#368
20070075447
2007-04-05

Bubble breaker assembly

#369
20070044960
2007-03-01

Methods, systems and apparatus for coiled tubing testing

#370
20070039728
2007-02-22

Hydrogeneration as an end product of a closed loop gaslift process employing LNG

#371
20070029092
2007-02-08

Mono-trip cement thru completion

#372
20070012450
2007-01-18

Hydrocarbon production system and method of use

#373
20070000663
2007-01-04

Enhanced liquid hydrocarbon recovery by miscible gas injection water drive

#374
20060289536
2006-12-28

Subsurface electrical heaters using nitride insulation

#375
20060272811
2006-12-07

Sekhars Correlation between Oil Production Rate and Gas-Lift Rate

#376
20060272809
2006-12-07

Wellbores utilizing fiber optic-based sensors and operating devices

#377
20060237191
2006-10-26

Model HCCV hydrostatic closed circulation valve

#378
20060196674
2006-09-07

Artificial lift with additional gas assist

#379
20060175090
2006-08-10

Drilling system and method

#380
20060144597
2006-07-06

Well production optimizing system

#381
20060137881
2006-06-29

One-way valve for a side pocket mandrel of a gas lift system

#382
20060131029
2006-06-22

Method and system for cleaning a well bore

#383
20060131027
2006-06-22

Device for heating and thermally insulating at least one undersea pipeline

#384
20060124352
2006-06-15

Control systems and methods for active controlled bottomhole pressure systems

#385
20060113082
2006-06-01

Ported velocity tube for gas lift operations

#386
20060076145
2006-04-13

Gas lift using a gas/oil mixer

#387
20060076140
2006-04-13

Gas lift apparatus and method for producing a well

#388
20060054327
2006-03-16

System for neutralizing the formation of slugs in a riser

#389
20060005968
2006-01-12

Temperature limited heaters with relatively constant current

#390
20060000357
2006-01-05

Method and system for producing inert gas from combustion by-products

#391
20050284641
2005-12-29

Controlled variable density fluid for wellbore operations

#392
20050269313
2005-12-08

Temperature limited heaters with high power factors

#393
20050269095
2005-12-08

Inhibiting reflux in a heated well of an in situ conversion system

#394
20050269094
2005-12-08

Triaxial temperature limited heater

#395
20050269093
2005-12-08

Variable frequency temperature limited heaters

#396
20050269092
2005-12-08

Vacuum pumping of conductor-in-conduit heaters

#397
20050269091
2005-12-08

Reducing viscosity of oil for production from a hydrocarbon containing formation

#398
20050269090
2005-12-08

Temperature limited heaters with thermally conductive fluid used to heat subsurface formations

#399
20050269089
2005-12-08

Temperature limited heaters using modulated DC power

#400
20050269088
2005-12-08

Inhibiting effects of sloughing in wellbores

#401
20050269077
2005-12-08

Start-up of temperature limited heaters using direct current (DC)

#402
20050230121
2005-10-20

ESP/gas lift back-up

#403
20050199391
2005-09-15

System and method for optimizing production in an artificially lifted well

#404
20050173336
2005-08-11

Apparatus for enhancing venturi suction in eductor mixers

#405
20050173112
2005-08-11

Annulus plugging detection using a pressure transmitter in gas-lift oil production

#406
20050155756
2005-07-21

Gas lift apparatus for a well

#407
20050098349
2005-05-12

Control systems and methods for active controlled bottomhole pressure systems

#408
20050084393
2005-04-21

Methods and apparatus for increasing and extending oil production from underground formations nearly depleted of natural gas drive

#409
20050072574
2005-04-07

System and method for injecting gas into a hydrocarbon reservoir

#410
20050047926
2005-03-03

Artificial lift with additional gas assist

#411
20050034852
2005-02-17

Heat exchange compressor

#412
20050023199
2005-02-03

Method and apparatus for treatment of wastewater employing membrane bioreactors

#413
20050012036
2005-01-20

Providing a light cell in a wellbore

#414
19097926
2026-03-31

Devices, systems, and methods for estimating flow rates in a plunger lift system

#415
18812558
2025-12-09

Fiber optic monitoring in chemical injection and gas lift systems

#416
18339228
2026-04-07

System for capturing and deploying natural gas from wellhead of oil and gas wells

#417
18085384
2024-03-26

Nitrogen lift in wells

#418
17883081
2023-02-21

Double barrier gas lift flow control device

#419
17667413
2023-04-04

Environmentally friendly, reliable, scalable, and efficient micro-turbine electric generator system

#420
17028869
2023-09-26

Life-of-well gas lift systems for producing a well and gas pump systems having pump control valves with belleville washers

#421
17019689
2022-03-22

Environmentally friendly, reliable, scalable, and efficient micro-turbine electric generator system

#422
16588472
2021-12-07

Gas lift compressor system and method for supplying compressed gas to multiple wells

#423
16402671
2020-08-25

Sealing plunger lift system and tubing connector

#424
15836823
2020-04-28

System and method to reduce wellbore annular fluid volumes

#425
15052653
2022-12-27

Systems and methods for analyzing resource production