ClassID:

135698

E21B47/08 - CPC Classification

Classification description:

Survey of boreholes or wells Measuring diameters or related dimensions at the borehole

Sub-classes:
Recent Application in this class:
#1
20260092519
2026-04-02

DOWNHOLE KINEMATIC SYSTEM AND METHOD

#2
20260085608
2026-03-26

DOWNHOLE CALIPER SYSTEM AND METHOD

#3
20260036027
2026-02-05

DETERMINING HYDRAULIC FRACTURE PROFILES IN MULTI-LAYERED SUBSURFACE FORMATIONS

#4
20260010127
2026-01-08

METHOD FOR UNBIASED ESTIMATION OF INDIVIDUAL METAL THICKNESS OF A PLURALITY OF CASING STRINGS

#5
20260009309
2026-01-08

METHOD OF WELL DECOMMISSIONING IN THROUGH-TUBING APPLICATIONS

#6
20250376924
2025-12-11

WELLBORE HOLE PROFILE DETERMINATION

#7
20250354479
2025-11-20

WELLBORE MECHANICAL CALIPER TOOL

#8
20250347209
2025-11-13

METHODS AND SYSTEMS FOR GREENHOUSE GAS CAPTURE AND SEQUESTRATION

#9
20250290405
2025-09-18

SYSTEMS AND METHODS FOR PREDICTING WELLBORE STIMULATION PERFORMANCE OF ACID JETTING THROUGH PRE-PERFORATED LINERS

#10
20250277441
2025-09-04

METHODS AND SYSTEMS FOR DETERMINING CONDUCTIVE HYDRAULIC FRACTURE CHARACTERISTICS VIA CROSS-WELL FIBER OPTIC MONITORING

#11
20250215786
2025-07-03

METHOD AND APPARATUS FOR MEASURING A WELLBORE

#12
20250199197
2025-06-19

SURROGATE MODELING METHOD FOR SHALE OIL FRACTURED SYSTEM SIMULATION BASED ON TRAJECTORY PIECEWISE-LINEARIZATION

#13
20250179914
2025-06-05

WIRELINE LOGGING IN HORIZONTAL WELLS

#14
20250116182
2025-04-10

SYSTEMS, METHODS, AND DEVICES FOR CONTROLLING THE OPERATION OF AN INDUSTRIAL MACHINE BASED ON A PIPE ATTRIBUTE

#15
20250116166
2025-04-10

UNTETHERED DOWNHOLE TOOLS

#16
20250116164
2025-04-10

DOWNHOLE ROBOT FOR OIL WELLS

#17
20250101860
2025-03-27

SYSTEM AND METHOD FOR DETERMINING PLACEMENT OF A DOWNHOLE DEVICE

#18
20250085268
2025-03-13

DRILLING FLUID OPTIMIZATION FOR CUTTINGS TRANSPORT AND RATE OF PENETRATION

#19
20250075618
2025-03-06

METHOD AND SYSTEM FOR CONTROLLING A WASHOUT AREA

#20
20250005686
2025-01-02

METHOD OF PREDICTING DRILLING AND WELL OPERATION

#21
20240401464
2024-12-05

SYSTEM AND METHOD FOR UNTETHERED MULTIFINGER IMAGING OF A WELLBORE INNER WALL

#22
20240394621
2024-11-28

DEVICES, SYSTEMS, AND METHODS FOR VALIDATING DRILLING EQUIPMENT

#23
20240328301
2024-10-03

Method for predicting water invasion frontier for complex well in bottom-water gas reservoir

#24
20240318543
2024-09-26

BOREHOLE FLUID FLOW MODELLING USING DYNAMIC PRESSURE BOUNDARY

#25
20240309753
2024-09-19

MEASUREMENT TOOL INSTALLATION APPARATUS AND METHOD

#26
20240309752
2024-09-19

DEVICE FOR MEASURING DEFORMATIONS IN A BOREHOLE

#27
20240301784
2024-09-12

Open hole washout mapping and steering tool

#28
20240280013
2024-08-22

PIPE DRIFTING IN WELLS

#29
20240200440
2024-06-20

Maximizing information gain from pipe inspection inversion

#30
20240151135
2024-05-09

METHOD AND APPARATUS FOR MEASURING A WELLBORE

#31
20240125224
2024-04-18

Systems, methods, and devices for controlling the operation of an industrial machine based on a pipe attribute

#32
20240076979
2024-03-07

Friction for cutting plug

#33
20240068362
2024-02-29

Autonomous wellbore drift robot

#34
20240011364
2024-01-11

Tubing-casing annulus scanner tool

#35
20230399944
2023-12-14

Method and system for acquiring geological data from a bore hole

#36
20230384479
2023-11-30

NUMERICAL SIMULATION CAPABILITY FOR DETERMINING BLOCKAGES WITHIN A WELLBORE AND WELLBORE COMPLETION SETUPS

#37
20230316152
2023-10-05

METHOD TO PREDICT AGGREGATE CALIPER LOGS USING LOGGING-WHILE-DRILLING DATA

#38
20230313675
2023-10-05

Nested tubulars for drifting a plurality of cylindrical diameters

#39
20230272690
2023-08-31

Methods and apparatus for printing a wellbore casing

#40
20230266497
2023-08-24

System and method for configuring a logging module

#41
20230266112
2023-08-24

System and method for measuring the inside diameter of a pipe

#42
20230237594
2023-07-27

Method of predicting drilling and well operation

#43
20230220762
2023-07-13

Modular Borehole Imaging Apparatus and Methods

#44
20230213323
2023-07-06

METHOD OF AND APPARATUS FOR DETERMINING VARIATIONS IN WALL THICKNESS IN FERROMAGNETIC TUBES

#45
20230212940
2023-07-06

Mechanical method for mapping a borehole shape usng a drilling tool

#46
20230212939
2023-07-06

Borehole geometry sensor and running tool assemblies and methods to deploy a completion component in a lateral bore

#47
20230203933
2023-06-29

Real time drilling model updates and parameter recommendations with caliper measurements

#48
20230195957
2023-06-22

AUTOMATIC CALIBRATION FOR A WATER INJECTION NETWORK MODEL

#49
20230193750
2023-06-22

System and method for downlinking continuous combinatorial frequencies alphabet

#50
20230167736
2023-06-01

System and method to measure changes in the mud level and gas properties when drilling through a total loss zone with no returns to surface

#51
20230140761
2023-05-04

Smart caliper and resistivity imaging logging-while-drilling tool (SCARIT)

#52
20230109922
2023-04-13

Apparatus for Verifying the Inner Diameter of Tubulars Forming A Tubular String

#53
20230025415
2023-01-26

Fit for purpose measurement system for drill hole logging

#54
20230008095
2023-01-12

Method and apparatus for measuring a wellbore

#55
20220381143
2022-12-01

EVENT DETECTION USING DTS FEATURES

#56
20220381136
2022-12-01

Determining pressure in subterranean formations

#57
20220381122
2022-12-01

METHODS AND SYSTEMS FOR GREENHOUSE GAS CAPTURE AND SEQUESTRATION

#58
20220298915
2022-09-22

Determination of borehole shape using standoff measurements

#59
20220275692
2022-09-01

Maintaining and inspecting a wellbore

#60
20220261513
2022-08-18

Modeling fractured wells

#61
20220259965
2022-08-18

Well Assembly Monitoring

#62
20220251942
2022-08-11

Calculating energy based net pressure and corresponding discharge area observed during hydraulic stimulation processes

#63
20220243562
2022-08-04

Integrated system and method for automated monitoring and control of sand-prone well

#64
20220229942
2022-07-21

HYBRID COLLAPASE STRENGTH FOR BOREHOLE TUBULAR DESIGN

#65
20220205356
2022-06-30

Drill bit with reciprocating gauge assembly

#66
20220195860
2022-06-23

Method of predicting drilling and well operation

#67
20220195804
2022-06-23

Boundary line generation for controlling drilling operations

#68
20220186604
2022-06-16

Method and system for determining depths of drill cuttings

#69
20220155048
2022-05-19

Gauge apparatus, system and method

#70
20220120169
2022-04-21

Use of residual gravitational signal to perform anomaly detection

#71
20220106870
2022-04-07

Wellhead growth monitoring system

#72
20220099438
2022-03-31

Analysis of well operations using dimensional measurement data

#73
20220099427
2022-03-31

System and method for measuring the inside diameter of a pipe

#74
20220066066
2022-03-03

System and method for configuring a logging module

#75
20220065058
2022-03-03

Mobility platform for efficient downhole navigation of robotic device

#76
20220003110
2022-01-06

Casing wear calculation

#77
20210381366
2021-12-09

Method and system for acquiring geological data from a bore hole

#78
20210381365
2021-12-09

Borehole localization relative to objects and subterranrean formations

#79
20210372270
2021-12-02

Measuring wellbore cross-sections using downhole caliper tools

#80
20210372269
2021-12-02

Measuring wellbore cross-sections using downhole caliper tools

#81
20210355814
2021-11-18

Effective wellbore compressibility determination apparatus, methods, and systems

#82
20210348492
2021-11-11

Systems and methods for generating a drainage radius log

#83
20210312111
2021-10-07

Multiscale modeling workflow of advanced waterflooding

#84
20210310780
2021-10-07

Method and device for controlled filling and inspection of blast holes

#85
20210301641
2021-09-30

Systems and methods for drilling a borehole using depth of cut measurements

#86
20210285314
2021-09-16

Systems, methods, and devices for controlling the operation of an industrial machine based on a pipe attribute

#87
20210277772
2021-09-09

Calculating energy based net pressure and corresponding discharge area observed during hydraulic stimulation processes

#88
20210270125
2021-09-02

Radially adjustable outsert for a downhole sensor

#89
20210215469
2021-07-15

Apparatus for verifying the inner diameter of tubulars forming a tubular string

#90
20210215016
2021-07-15

Borehole sealing device

#91
20210189875
2021-06-24

Estimating a formation index using pad measurements

#92
20210180444
2021-06-17

Multi-finger caliper

#93
20210180442
2021-06-17

Modular borehole imaging apparatus and methods

#94
20210172256
2021-06-10

Production cavern

#95
20210148200
2021-05-20

Processes and systems for injection of a liquid and gas mixture into a well

#96
20210115785
2021-04-22

Inflow detection using DTS features

#97
20210115748
2021-04-22

TOPICAL COMPOSITIONS AND METHODS OF TREATMENT

#98
20210108506
2021-04-15

Determination of borehole shape using standoff measurements

#99
20210087918
2021-03-25

Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates

#100
20210032965
2021-02-04

SYSTEMS AND PROCESSES FOR PERFORMING ARTIFICIAL LIFT ON A WELL

#101
20200400015
2020-12-24

Eccentricity correction algorithm for borehole shape and tool location computations from caliper data

#102
20200392842
2020-12-17

Method for determining vertical well stratified fracturing crack lengths based on interlayer equilibrium displacement

#103
20200371495
2020-11-26

AUTOMATED REAL-TIME HOLE CLEANING EFFICIENCY INDICATOR

#104
20200370381
2020-11-26

Automated drilling advisory and control system

#105
20200355061
2020-11-12

Comprehensive structural health monitoring method for bottom hole assembly

#106
20200263532
2020-08-20

Caliper-arm retention system

#107
20200224532
2020-07-16

Method and system for acquiring geological data from a bore hole

#108
20200115987
2020-04-16

TOPICAL COMPOSITIONS AND METHODS OF TREATMENT

#109
20200109620
2020-04-09

Stator bore gage

#110
20200103374
2020-04-02

Remote-field eddy current based total thickness logging

#111
20200049481
2020-02-13

Caliper tool and sensor for use in high pressure environments

#112
20200040712
2020-02-06

Monitoring expandable screen deployment in highly deviated wells in open hole environment

#113
20190383134
2019-12-19

METHODS OF CALIBRATING BORE GAUGES, SETTING PLATES FOR CALIBRATING BORE GAUGES, AND KITS INCLUDING A BORE GAUGE AND A SETTING PLATE

#114
20190376381
2019-12-12

Logging while drilling (LWD) mechanical calipers

#115
20190368336
2019-12-05

Method and system for determining depths of drill cuttings

#116
20190292897
2019-09-26

Supporting a string within a wellbore with a smart stabilizer

#117
20190292896
2019-09-26

Opening a wellbore with a smart hole-opener

#118
20190203544
2019-07-04

Downhole mobility module for logging and intervention of extended reach wells

#119
20190085684
2019-03-21

METHOD, DEVICE AND TERMINAL FOR DETERMINING BOREHOLE CROSS-SECTIONAL SHAPE

#120
20190078430
2019-03-14

Multistage processing and inversion of corrosion detection tools

#121
20190055819
2019-02-21

Foam cleanout methods and systems for wellbores

#122
20190032475
2019-01-31

Borehole shape estimation

#123
20180329110
2018-11-15

Cement evaluation with X-ray tomography

#124
20180328166
2018-11-15

METHODS AND APPARATUS FOR ENHANCING FLUID PRODUCTION FROM A WELL

#125
20180274358
2018-09-27

System and method for detecting cross bores

#126
20180252837
2018-09-06

Determining borehole parameters using ultrasonic and micro-resistivity calipers

#127
20180238146
2018-08-23

Caliper steerable tool for lateral sensing and accessing

#128
20180172418
2018-06-21

Caliper tool with positive pivoting arm

#129
20180149016
2018-05-31

Apparatus and method for preventing collisions while moving tubulars into and out of a wellhead

#130
20180142546
2018-05-24

Receiving apparatus suitable for azimuthally acoustic logging while drilling

#131
20180135382
2018-05-17

Methods for formulating a cement slurry for use in a subterranean salt formation

#132
20180087377
2018-03-29

Methods for formulating a cement slurry for use in a subterranean salt formation using geometric modeling

#133
20180017701
2018-01-18

Correction of galvanic tool data to account for rugosity and cave effect

#134
20180016888
2018-01-18

Mud cake correction of formation measurement data

#135
20170335682
2017-11-23

INTELLIGENT DRILLING RISER TELEMETRY SYSTEM

#136
20170335672
2017-11-23

Measuring device and method for measuring a hole in the ground

#137
20170322332
2017-11-09

Borehole shape characterization

#138
20170321538
2017-11-09

Stator bore gage

#139
20170308634
2017-10-26

Methods and systems for modeling an advanced 3-dimensional bottomhole assembly

#140
20170204720
2017-07-20

Adjusting survey points post-casing for improved wear estimation

#141
20170184389
2017-06-29

Device and method for detecting wall abrasion of solid filler feeding well

#142
20170175467
2017-06-22

Method for detecting gain or loss of drilling fluid in a drilling installation associated calculation system and associated drilling installation

#143
20170138157
2017-05-18

Methods for analyzing and optimizing drilling tool assemblies

#144
20170130576
2017-05-11

Dimensional characteristic determinations of a wellbore

#145
20170108611
2017-04-20

Scale identifier

#146
20170101865
2017-04-13

Detecting defects in non-nested tubings and casings using calibrated data and time thresholds

#147
20170044874
2017-02-16

Tool for creating impressions of downhole objects

#148
20160290122
2016-10-06

Casing defect determination using stored defect response information

#149
20160258246
2016-09-08

Methods for formulating a cement slurry for use in a subterranean salt formation

#150
20160251953
2016-09-01

Ratio-based mode switching for optimizing weight-on-bit

#151
20160245069
2016-08-25

Spring with integral borehole wall applied sensor

#152
20160237808
2016-08-18

Inside measuring instrument

#153
20160123136
2016-05-05

Method and device for measuring pressure exerted by earth material

#154
20160115781
2016-04-28

Stator bore gage

#155
20160102543
2016-04-14

Methods for estimating wellbore gauge and dogleg severity

#156
20160032710
2016-02-04

TOOL FOR MEASURING WELLBORE GEOMETRY

#157
20150369037
2015-12-24

Downhole sensor tool for measuring borehole conditions with fit-for-purpose sensor housings

#158
20150323697
2015-11-12

Caliper tool with in-situ temperature compensation

#159
20150315897
2015-11-05

System and method for predicting and visualizing drilling events

#160
20150285607
2015-10-08

System and method for determining deformed pipe geometry

#161
20150267528
2015-09-24

System and method for caliper calibration

#162
20150240622
2015-08-27

System and method for analyzing wellbore survey data to determine tortuosity of the wellbore using tortuosity parameter values

#163
20150143709
2015-05-28

Wellbore caliper with maximum diameter seeking feature

#164
20150068739
2015-03-12

Wellbore completion for methane hydrate production with real time feedback of borehole integrity using fiber optic cable

#165
20150053484
2015-02-26

Hole enlargement drilling device and methods for using same

#166
20150012217
2015-01-08

System and methods for measuring borehole caliper in oil-based mud

#167
20150000979
2015-01-01

System and method for detecting underground cross-bores

#168
20140332232
2014-11-13

Annular barrier with an expansion detection device

#169
20140311802
2014-10-23

Circumferential and longitudinal cutter coverage in continuation of a first bit diameter to a second expandable reamer diameter

#170
20140231072
2014-08-21

Method and system of planning and/or drilling wellbores

#171
20140158430
2014-06-12

Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter

#172
20140138084
2014-05-22

Caliper steerable tool for lateral sensing and accessing

#173
20140131101
2014-05-15

Systems and methods for determining enhanced equivalent circulating density and interval solids concentration in a well system using multiple sensors

#174
20140083771
2014-03-27

Mechanical caliper system for a logging while drilling (LWD) borehole caliper

#175
20140073918
2014-03-13

Method of sizing internal body structure, and mechanism and system for same

#176
20140059874
2014-03-06

Wellbore caliper with maximum diameter seeking feature

#177
20130306373
2013-11-21

Electronically activated underreamer and calliper tool

#178
20130104641
2013-05-02

Apparatus and methods for orienting, stabilizing, or stably operating a logging tool

#179
20130098685
2013-04-25

Detecting and mitigating borehole diameter enlargement

#180
20130008649
2013-01-10

METHOD AND MODULE FOR DETERMINATION OF EROSION IN SYSTEMS

#181
20120300224
2012-11-29

Inspection device for measuring pipe size

#182
20120239345
2012-09-20

Self centering bore measurement unit

#183
20120217008
2012-08-30

System and method for stress field based wellbore steering

#184
20120211280
2012-08-23

Integrated reaming and measurement system and related methods of use

#185
20120132007
2012-05-31

Use of fiber optics to monitor cement quality

#186
20120055711
2012-03-08

Wall contact caliper instruments for use in a drill string

#187
20120037422
2012-02-16

Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter

#188
20120000655
2012-01-05

Methods and apparatus for improved cement plug placement

#189
20120000650
2012-01-05

Methods and apparatus for improved cement plug placement

#190
20120000649
2012-01-05

APPARATUS AND METHODS FOR IMPROVED CEMENT PLUG PLACEMENT

#191
20110278064
2011-11-17

Electronically activated underreamer and calliper tool

#192
20110253364
2011-10-20

System and method for generating density in a cased-hole wellbore

#193
20110247878
2011-10-13

Expansion and sensing tool

#194
20110203849
2011-08-25

Expandable Reamers for Earth Boring Applications

#195
20110094734
2011-04-28

Downhole tool for investigating perforations

#196
20100319991
2010-12-23

Wall contact caliper instruments for use in a drill string

#197
20100282511
2010-11-11

Wired Smart Reamer

#198
20100263441
2010-10-21

Multiple stage mechanical drift tool

#199
20100258303
2010-10-14

Annulus mud flow rate measurement while drilling and use thereof to detect well dysfunction

#200
20100230116
2010-09-16

Anchoring system and method

#201
20100139981
2010-06-10

Hole enlargement drilling device and methods for using same

#202
20100108386
2010-05-06

System, apparatus, and method of conducting measurements of a borehole

#203
20100076688
2010-03-25

Borehole characterization

#204
20100067329
2010-03-18

Method of determining borehole conditions from distributed measurement data

#205
20090301782
2009-12-10

Methods and apparatus to determine and use wellbore diameters

#206
20090200079
2009-08-13

Downhole washout detection system and method

#207
20090194284
2009-08-06

Magnetic motor shaft couplings for wellbore applications

#208
20090178849
2009-07-16

Apparatus and method for producing soil elements underground

#209
20090166086
2009-07-02

Closed-loop control of rotary steerable blades

#210
20090145666
2009-06-11

Expandable stabilizer with roller reamer elements

#211
20090101337
2009-04-23

Method and apparatus for detecting defects in oilfield tubulars

#212
20090090554
2009-04-09

Closed-loop physical caliper measurements and directional drilling method

#213
20090084176
2009-04-02

Formation evaluation using estimated borehole tool position

#214
20090065252
2009-03-12

System and method for stress field based wellbore steering

#215
20080266577
2008-10-30

Apparatus for measuring an internal dimension of a well bore

#216
20080156535
2008-07-03

Wellbore treatment apparatus and method

#217
20080149331
2008-06-26

Method for determining the size of tubular pipe to be inserted in a borehole

#218
20080128175
2008-06-05

Expandable reamers for earth boring applications

#219
20080128169
2008-06-05

Restriction element trap for use with an actuation element of a downhole apparatus and method of use

#220
20080078242
2008-04-03

Formation evaluation using estimated borehole tool position

#221
20070262772
2007-11-15

Method and apparatus for correcting magnetic flux sensor signals

#222
20070193776
2007-08-23

Borehole tool

#223
20070104027
2007-05-10

TOOL FOR MEASURING PERFORATION TUNNEL DEPTH

#224
20060249307
2006-11-09

Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations

#225
20060113111
2006-06-01

System, apparatus, and method of conducting measurements of a borehole

#226
20060064889
2006-03-30

Borehole caliper tool

#227
20060018190
2006-01-26

Tool for Measuring Perforation Tunnel Depth

#228
20050279498
2005-12-22

Apparatus and methods for positioning in a borehole

#229
18735378
2025-08-12

Systems and methods for analyzing tortuosity in underground wellbores

#230
18408057
2025-05-27

Fracking efficiency evaluation system and method(s) of use