ClassID:

135726

E21B49/008 - page 2 - CPC Classification

Classification description:

Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor

Recent Application in this class:
#301
20140182844
2014-07-03

System and method for performing wellbore stimulation operations

#302
20140182840
2014-07-03

Method of monitoring the flow of natural or injected water during oil field recovery processes using an organic tracer

#303
20140145716
2014-05-29

NMR tracking of injected fluids

#304
20140076546
2014-03-20

Single trip multi-zone drill stem test system

#305
20140058686
2014-02-27

Natural fracture injection test

#306
20140027111
2014-01-30

Active seismic monitoring of fracturing operations and determining characteristics of a subterranean body using pressure data and seismic data

#307
20140000358
2014-01-02

Pore pressure measurement in low-permeability and impermeable materials

#308
20140000357
2014-01-02

Method for estimating properties of a subterranean formation

#309
20130327137
2013-12-12

Method for measuring pressure in an underground formation

#310
20130317752
2013-11-28

Automatic fluid coding and hydraulic zone determination

#311
20130293891
2013-11-07

Sampling tool with dual flowline architecture

#312
20130282291
2013-10-24

Monitoring of reservoir fluid moving along flow pathways in a producing oil field using passive seismic emissions

#313
20130245952
2013-09-19

SYSTEM AND METHOD FOR CHARACTERIZING A FLOW PROPERTY OF A PRODUCTION WELL SITE IN A RESERVOIR

#314
20130231867
2013-09-05

SYSTEM AND METHOD FOR MODELING SHALE DISCONTINUITY

#315
20130192358
2013-08-01

Method and apparatus for testing lost circulation materials for subterranean formations

#316
20130138348
2013-05-30

Method for determining the profile of an inflow and the parameters of a well-surrounding area in a multipay well

#317
20130075088
2013-03-28

Single pump focused sampling

#318
20130073208
2013-03-21

Method of measuring parameters of a porous medium using nanoparticle injection

#319
20130042677
2013-02-21

Method for quantitatively assessing connectivity for well pairs at varying frequencies

#320
20130037270
2013-02-14

Apparatus, system and method for injecting a fluid into a formation downhole

#321
20130019672
2013-01-24

Autonomous formation pressure test process for formation evaluation tool

#322
20120318503
2012-12-20

Carbon-based fluorescent tracers as oil reservoir nano-agents

#323
20120316788
2012-12-13

Formation testing planning and monitoring

#324
20120273186
2012-11-01

Fluid minotiring and flow characterization

#325
20120253679
2012-10-04

Measurement pretest drawdown methods and apparatus

#326
20120241152
2012-09-27

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#327
20120228027
2012-09-13

Method for characterizing subsurface formations using fluid pressure response during drilling operations

#328
20120222859
2012-09-06

Dispersing separated hydrocarbon gas into separated oil during surface well testing for improved oil mobility

#329
20120215451
2012-08-23

Pore pressure from spectroscopy and sonic data

#330
20120181018
2012-07-19

Rotational wellbore test valve

#331
20120173148
2012-07-05

Measurement of hydraulic head profile in geologic media

#332
20120158310
2012-06-21

Method of determining reservoir pressure

#333
20120150515
2012-06-14

In-situ stress measurements in hydrocarbon bearing shales

#334
20120132419
2012-05-31

Modular pumpouts and flowline architecture

#335
20120116740
2012-05-10

Method for characterizing the fracture network of a fractured reservoir and method for developing it

#336
20120103601
2012-05-03

Method for determination of fluid influx profile and near-wellbore area parameters

#337
20120103600
2012-05-03

Method of determination of fluid influx profile and near-wellbore space parameters

#338
20120103599
2012-05-03

Reservoir pressure testing to determine hydrate composition

#339
20120095688
2012-04-19

Radial waves in a borehole and stoneley waves for measuring formation permeability and electroacoustic constant

#340
20120043077
2012-02-23

Methods for borehole measurements of fracturing pressures

#341
20120024523
2012-02-02

Tool and method for determining formation parameter

#342
20120012324
2012-01-19

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#343
20120012323
2012-01-19

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#344
20120012313
2012-01-19

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#345
20110303409
2011-12-15

Downhole fluid injection

#346
20110277997
2011-11-17

Tool to determine formation fluid movement

#347
20110272148
2011-11-10

Methods, systems and apparatus for coiled tubing testing

#348
20110272147
2011-11-10

Active seismic monitoring of fracturing operations and determining characteristics of a subterranean body using pressure data and seismic data

#349
20110251796
2011-10-13

Multi-Well Interference Testing and In-Situ Reservoir Behavior Characterization

#350
20110199862
2011-08-18

Interference testing while drilling

#351
20110198078
2011-08-18

Formation evaluation instrument and method

#352
20110155464
2011-06-30

METHOD FOR THE IDENTIFICATION OF THE FORMATION FLUID INVASION MOMENT

#353
20110122727
2011-05-26

DETECTING ACOUSTIC SIGNALS FROM A WELL SYSTEM

#354
20110107830
2011-05-12

Apparatus and methods for characterizing a reservoir

#355
20110094733
2011-04-28

Apparatus and methods for pulse testing a formation

#356
20110073301
2011-03-31

Well jet device for logging and developing horizontal wells with abnormally low formation pressure

#357
20110061863
2011-03-17

Fluid monitoring and flow characterization

#358
20110011174
2011-01-20

Retrievable downhole testing tool

#359
20100326661
2010-12-30

WELL JET DEVICE AND THE OPERATION METHOD THEREOF

#360
20100314105
2010-12-16

Injection-backflow technique for measuring fracture surface area adjacent to a wellbore

#361
20100314104
2010-12-16

METHOD OF USING PRESSURE SIGNATURES TO PREDICT INJECTION WELL ANOMALIES

#362
20100294033
2010-11-25

Assembly and method for transient and continuous testing of an open portion of a well bore

#363
20100288490
2010-11-18

Method for determining filtration properties of rocks

#364
20100286918
2010-11-11

Apparatus and method for predicting properties of earth formations

#365
20100274490
2010-10-28

Thickness-independent computation of horizontal and vertical permeability

#366
20100252268
2010-10-07

USE OF CALIBRATION INJECTIONS WITH MICROSEISMIC MONITORING

#367
20100217575
2010-08-26

Method for controlling production and downhole pressures of a well with multiple subsurface zones and/or branches

#368
20100214120
2010-08-26

Well test system to control well processes based on quantity measurements

#369
20100206548
2010-08-19

Methods and apparatus to perform stress testing of geological formations

#370
20100200225
2010-08-12

Multi-functional completion tool

#371
20100186495
2010-07-29

Devices and methods for formation testing by measuring pressure in an isolated variable volume

#372
20100175873
2010-07-15

Single pump focused sampling

#373
20100169020
2010-07-01

Method and apparatus for real time oil based mud contamination monitoring

#374
20100155061
2010-06-24

Formation evaluation system and method

#375
20100147513
2010-06-17

Well jet device for well-logging operations and the operating method thereof

#376
20100126717
2010-05-27

Instrumented formation tester for injecting and monitoring of fluids

#377
20100121580
2010-05-13

Method of estimating physical parameters of a geological formation

#378
20100116500
2010-05-13

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#379
20100101319
2010-04-29

Pressure interference testing for estimating hydraulic isolation

#380
20100058854
2010-03-11

Measuring properties of low permeability formations

#381
20100050762
2010-03-04

Methods and apparatus to perform pressure testing of geological formations

#382
20100032156
2010-02-11

METHOD FOR TESTING AN ENGINEERED GEOTHERMAL SYSTEM USING ONE STIMULATED WELL

#383
20100023269
2010-01-28

Managing flow testing and the results thereof for hydrocarbon wells

#384
20090276156
2009-11-05

Automated hydrocarbon reservoir pressure estimation

#385
20090276100
2009-11-05

System, program product, and related methods for performing automated real-time reservoir pressure estimation enabling optimized injection and production strategies

#386
20090272530
2009-11-05

Annular region evaluation in sequestration wells

#387
20090272528
2009-11-05

Method of miscible injection testing of oil wells and system thereof

#388
20090255731
2009-10-15

Real time formation pressure test and pressure integrity test

#389
20090255669
2009-10-15

Tool and method for determining formation parameter

#390
20090250211
2009-10-08

Refracture-candidate evaluation and stimulation methods

#391
20090250207
2009-10-08

METHOD AND APPARATUS FOR SAMPLING AND/OR TESTING DOWNHOLE FORMATIONS

#392
20090234584
2009-09-17

DATA GATHERING, TRANSMISSION, INTEGRATION AND INTERPRETATION DURING COILED TUBING WELL TESTING OPERATIONS

#393
20090216456
2009-08-27

ANALYZING DYNAMIC PERFORMANCE OF RESERVOIR DEVELOPMENT SYSTEM BASED ON THERMAL TRANSIENT DATA

#394
20090193884
2009-08-06

Mobile vacuum sampling system

#395
20090188665
2009-07-30

Monitoring of downhole parameters and tools utilizing fiber optics

#396
20090177403
2009-07-09

Logging while drilling system

#397
20090165548
2009-07-02

Systems and methods for well data analysis

#398
20090159275
2009-06-25

System and method for optimizing production in a well

#399
20090114010
2009-05-07

Testing process for hydrocarbon wells at zero emissions

#400
20090114008
2009-05-07

Method and apparatus

#401
20090107668
2009-04-30

Multi-function completion tool

#402
20090101340
2009-04-23

Technique and apparatus to perform a leak off test in a well

#403
20090084544
2009-04-02

Method and system for interpreting swabbing tests using nonlinear regression

#404
20090037112
2009-02-05

Methods and systems for evaluating and treating previously-fractured subterranean formations

#405
20090020283
2009-01-22

2D Well Testing with Smart Plug Sensor

#406
20090007651
2009-01-08

Pressure interference testing for estimating hydraulic isolation

#407
20080234938
2008-09-25

Method and apparatus for formation testing

#408
20080230221
2008-09-25

METHODS AND SYSTEMS FOR MONITORING NEAR-WELLBORE AND FAR-FIELD RESERVOIR PROPERTIES USING FORMATION-EMBEDDED PRESSURE SENSORS

#409
20080190603
2008-08-14

Method of fracturing a subterranean formation at optimized and pre-determined conditions

#410
20080015781
2008-01-17

Method and apparatus for formation testing

#411
20070175273
2007-08-02

Method for measuring formation properties with a time-limited formation test

#412
20070162235
2007-07-12

Interpreting well test measurements

#413
20070157719
2007-07-12

Practical methods to estimate horizontal and vertical permeabilities

#414
20070083331
2007-04-12

Methods and systems for determining reservoir properties of subterranean formations with pre-existing fractures

#415
20070079962
2007-04-12

Formation evaluation system and method

#416
20070079652
2007-04-12

Methods and systems for determining reservoir properties of subterranean formations

#417
20070044960
2007-03-01

Methods, systems and apparatus for coiled tubing testing

#418
20070038375
2007-02-15

Diagnosis of formation characteristics in wells

#419
20060293857
2006-12-28

Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer

#420
20060243438
2006-11-02

Method to measure injector inflow profiles

#421
20060219401
2006-10-05

Apparatus and method for sensing downhole parameters

#422
20060191332
2006-08-31

Method for measuring formation properties with a formation tester

#423
20060129365
2006-06-15

Method and system for estimating the amount of supercharging in a formation

#424
20060129321
2006-06-15

Method of determining the per strata reserve quality of an oil well

#425
20060042372
2006-03-02

Determination of correct horizontal and vertical permeabilities in a deviated well

#426
20060042371
2006-03-02

Determining horizontal and vertical permeabilities by analyzing two pretests in a horizontal well

#427
20060042370
2006-03-02

Determination of correct horizontal and vertical permeabilities in a deviated well

#428
20060016594
2006-01-26

Methods to detect formation pressure

#429
20060005965
2006-01-12

Sensor system

#430
20050268709
2005-12-08

Methods for using a formation tester

#431
20050222852
2005-10-06

Method and an apparatus for detecting fracture with significant residual width from previous treatments

#432
20050216198
2005-09-29

Methods and apparatus for estimating physical parameters of reservoirs using pressure transient fracture injection/falloff test analysis

#433
20050192855
2005-09-01

System for evaluating over and underbalanced drilling operations

#434
20050187715
2005-08-25

Method for measuring formation properties with a time-limited formation test

#435
20050177309
2005-08-11

Method and probe for measuring hydraulic conductivity of soil

#436
20050173113
2005-08-11

Method for measuring formation properties with a time-limited formation test

#437
20050172710
2005-08-11

Method for borehole conductivity profiling

#438
20050171699
2005-08-04

Method for determining pressure of earth formations

#439
20050167156
2005-08-04

Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement

#440
20050098312
2005-05-12

Method for measuring formation properties with a time-limited formation test

#441
20050087009
2005-04-28

Method for measuring formation properties with a time-limited formation test

#442
20050039527
2005-02-24

Determining the pressure of formation fluid in earth formations surrounding a borehole

#443
20050012036
2005-01-20

Providing a light cell in a wellbore

#444
19287010
2026-03-31

Maximizing stimulation efficiency and contact area for heat harvesting

#445
19014007
2026-03-24

Wireline conveyed casing test plug with a burst disk and pressure test tool assembly

#446
19007494
2025-08-05

Method and device for determining fracture closure pressure based on hydraulic fracturing

#447
18760958
2025-12-30

Dummy well set-up for testing logging tools

#448
18647538
2025-05-27

Fracture reactivation index (FRI) for seal integrity analysis in carbon capture and storage (CCS)

#449
18616716
2025-09-30

Systems and methods for conformance control of a wellbore

#450
18407919
2025-02-11

Compact apparatus for quick core flood tests and method of use

#451
18240188
2024-12-24

Noise characterization in formation testing

#452
17500217
2022-02-01

Stage profiles for operations of hydraulic systems and associated methods

#453
14698773
2018-01-09

Ruggedized downhole tool for real-time measurements and uses thereof