ClassID:

135328

E21B17/14 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings Casing shoes for the protection of the bottom of the casing

Recent Application in this class:
#1
20260049533
2026-02-19

LIMITLESS INJECTION SHOE

#2
20250270918
2025-08-28

INDUCTION LOOP CEMENTING PROGRESS DETECTION

#3
20250270914
2025-08-28

METHODS AND SYSTEMS FOR STORING HYDROGEN IN A SALT CAVERN

#4
20250163764
2025-05-22

ALIGNABLE GUIDANCE DEVICE FOR CASING ENTRY MILLING AND CEMENTING OPERATIONS

#5
20250092773
2025-03-20

Methods and systems for storing hydrogen in a salt cavern

#6
20240392634
2024-11-28

SELF INDEXING MULE SHOE MECHANISM

#7
20240183231
2024-06-06

Casing shoe assembly

#8
20240068306
2024-02-29

Casing shoe with flow operated diverter valve

#9
20240011359
2024-01-11

Rasping shoe for non-rotational deployment of casing string

#10
20230272672
2023-08-31

Modified whipstock design integrating cleanout and setting mechanisms

#11
20230125843
2023-04-27

Modular casing reamer shoe system with jarring capability

#12
20230117664
2023-04-20

Downhole apparatus and methods

#13
20230105819
2023-04-06

GUIDE ASSEMBLY, METHOD AND SYSTEM

#14
20230070661
2023-03-09

Flexi-string for washout below a casing shoe

#15
20230046556
2023-02-16

Off bottom cementing system

#16
20220412192
2022-12-29

Guide sub for multilateral junction

#17
20220349269
2022-11-03

Casing strings and related methods of deployment in horizontal wells

#18
20220325614
2022-10-13

INDUCTION LOOP CEMENTING PROGRESS DETECTION

#19
20220282582
2022-09-08

PASS-THROUGH TAPERED NOSE TOOL

#20
20220275709
2022-09-01

Guide sub for multilateral junction

#21
20220268127
2022-08-25

Downhole apparatus and methods for casing

#22
20220268126
2022-08-25

Single trip liner running and tie back system

#23
20220268115
2022-08-25

REAMER / GUIDE INTERCHANGEABLE TUBULAR SHOE

#24
20220178207
2022-06-09

Casing float tool

#25
20220081973
2022-03-17

Drillable adaptive turbine guide shoe

#26
20220049576
2022-02-17

DIFFERENTIAL FILL VALVE SLEEVE BALL ASSEMBLY

#27
20220018218
2022-01-20

Pass-through tapered nose tool

#28
20220018217
2022-01-20

Pass-through tapered nose tool

#29
20210404294
2021-12-30

Self-deflecting multilateral junction

#30
20210404269
2021-12-30

Systems and methods for indicating completion of a reverse cementing operation

#31
20210324687
2021-10-21

Wellhead connector soft landing system and method

#32
20210246730
2021-08-12

Guide shoe with lockable nose

#33
20210180433
2021-06-17

Casing reamer shoe

#34
20210115735
2021-04-22

CASING FLOAT TOOL

#35
20200392795
2020-12-17

EARTH-BORING TOOLS FOR COUPLING TO CASINGS AND RELATED SYSTEMS AND METHODS

#36
20200332601
2020-10-22

Casing float tool

#37
20200240214
2020-07-30

Casing float tool

#38
20200191270
2020-06-18

T-seal

#39
20200190917
2020-06-18

Float shoe having concrete filled, eccentric nose with jets

#40
20200056445
2020-02-20

Complex components for molded composite frac plugs

#41
20190218882
2019-07-18

Shoe isolation system and method for isolating a shoe

#42
20190145187
2019-05-16

Float equipment for a wellbore

#43
20190085645
2019-03-21

Device and method for slanting a conductor casing

#44
20190040703
2019-02-07

Vibration-induced installation of wellbore casing

#45
20190024464
2019-01-24

Casing Shoe Reamer and Method

#46
20180266231
2018-09-20

Solids control methods, apparatus and systems

#47
20180266206
2018-09-20

Modular insert float system

#48
20180223607
2018-08-09

TOE CASING

#49
20180202260
2018-07-19

Casing float tool

#50
20180187526
2018-07-05

Method and system for sealing a segmented expandable cone

#51
20180179864
2018-06-28

Fail-safe high velocity flow casing shoe

#52
20180179832
2018-06-28

Expandable drillable shoe

#53
20180051533
2018-02-22

Degradable pump in shoe

#54
20170254173
2017-09-07

SEALED DOWNHOLE EQUIPMENT AND METHOD FOR FABRICATING THE EQUIPMENT

#55
20170211374
2017-07-27

Rare earth alloys as borehole markers

#56
20170138153
2017-05-18

Casing float tool

#57
20170130536
2017-05-11

SHOE FOR A TUBULAR ELEMENT IN A WELLBORE

#58
20160168912
2016-06-16

Oscillating mud motor

#59
20150330151
2015-11-19

Apparatus for drilling and lining a borehole

#60
20150308195
2015-10-29

Reamer shoe attachment for flexible casing shoe

#61
20150226037
2015-08-13

Downhole roller

#62
20150075806
2015-03-19

Toe circulation sub

#63
20140332276
2014-11-13

Method and apparatus for plastic pipe drilling

#64
20140299386
2014-10-09

Crowns for earth-boring casing shoes, earth-boring casing shoes, and methods of forming earth-boring casing shoes

#65
20140251617
2014-09-11

Method and apparatus for removing unexpanded shoe

#66
20140246254
2014-09-04

Methods of attaching cutting elements to casing bits and related structures

#67
20140216742
2014-08-07

Floating apparatus and method for fabricating the apparatus

#68
20140110098
2014-04-24

Flexible casing guide running tool

#69
20140060801
2014-03-06

Preload and centralizing device for milling subterranean barrier valves

#70
20140041942
2014-02-13

High-speed triple string drilling system

#71
20140000906
2014-01-02

Liner flotation system

#72
20130327575
2013-12-12

Earth removal member with features for facilitating drill-through

#73
20130319769
2013-12-05

WELLBORE REAMING TOOL HAVING LOCKING CLUTCH FOR DRILL OUT AFTER RUNNING WELLBORE TUBULARS

#74
20130180783
2013-07-18

Turbine driven reaming bit with stability and cutting efficiency features

#75
20130175097
2013-07-11

Cutting assembly suitable for use on a drillable drill bit

#76
20130048308
2013-02-28

Integrated continuous liner expansion method

#77
20120255743
2012-10-11

Methods of casing a wellbore with corrodable boring shoes

#78
20120227985
2012-09-13

METHOD FOR COUPLING OF A CASING TUBE TO A DRILL BIT

#79
20120199398
2012-08-09

Wellbore completion system with reaming tool

#80
20120168228
2012-07-05

Apparatus and methods for drilling a wellbore using casing

#81
20120145409
2012-06-14

High collapse resistance solid expandable technology

#82
20120145381
2012-06-14

Foldable composite tubular structure

#83
20120103694
2012-05-03

Earth removal member with features for facilitating drill-through

#84
20110308813
2011-12-22

Tubing shoe

#85
20110266069
2011-11-03

CASING SHOES INCLUDING CUTTING ELEMENTS, CUTTING ELEMENTS FOR EARTH-BORING TOOL, AND RELATED METHODS

#86
20110259643
2011-10-27

Casing and liner drilling shoes having spiral blade configurations, and related methods

#87
20110259608
2011-10-27

Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods

#88
20110259606
2011-10-27

Casing shoes having drillable and non-drillable cutting elements in different regions and related methods

#89
20110259605
2011-10-27

Casing and liner drilling shoes having selected profile geometries, and related methods

#90
20110259604
2011-10-27

Casing and liner drilling shoes having integrated operational components, and related methods

#91
20110214863
2011-09-08

Super shoe swell packer

#92
20110209922
2011-09-01

CASING END TOOL

#93
20110203850
2011-08-25

Methods of drilling using differing types of cutting elements

#94
20110180326
2011-07-28

Apparatus and method for cutting a wellbore

#95
20110180261
2011-07-28

Method of removing cutters

#96
20110168448
2011-07-14

DRILLING OUT CASING BITS WITH OTHER CASING BITS

#97
20110168447
2011-07-14

Reaming tool

#98
20110061941
2011-03-17

Earth removal member with features for facilitating drill-through

#99
20110011646
2011-01-20

Apparatus and methods for drilling a wellbore using casing

#100
20100326729
2010-12-30

CASING BITS, DRILLING ASSEMBLIES, AND METHODS FOR USE IN FORMING WELLBORES WITH EXPANDABLE CASING

#101
20100307837
2010-12-09

Casing bit and casing reamer designs

#102
20100252331
2010-10-07

METHODS FOR FORMING BORING SHOES FOR WELLBORE CASING, AND BORING SHOES AND INTERMEDIATE STRUCTURES FORMED BY SUCH METHODS

#103
20100065282
2010-03-18

Method of drilling out a reaming tool

#104
20100051350
2010-03-04

Drilling out casing bits with other casing bits

#105
20100032170
2010-02-11

METHOD AND APPARATUS FOR RUNNING TUBULARS

#106
20100025120
2010-02-04

Casing shoe and retrievable bit assembly

#107
20090159281
2009-06-25

Running bore-lining tubulars

#108
20080302540
2008-12-11

Insert sleeve forming device for a recess shoe

#109
20080236813
2008-10-02

Shoe

#110
20080223575
2008-09-18

Casing and liner drilling bits and reamers

#111
20080149393
2008-06-26

Earth boring drill bits with casing component drill out capability and methods of use

#112
20080121396
2008-05-29

Completion apparatus and methods for use in hydrocarbon wells

#113
20080110673
2008-05-15

Apparatus and methods for drilling a wellbore using casing

#114
20080110625
2008-05-15

STRESS REDUCED CEMENT SHOE OR COLLAR BODY

#115
20080093124
2008-04-24

Apparatus and methods for drilling a wellbore using casing

#116
20070289782
2007-12-20

Reaming tool suitable for running on casing or liner

#117
20070261846
2007-11-15

Completion apparatus and methods for use in wellbores

#118
20070204987
2007-09-06

Anchoring device for casing procedures in well bores

#119
20070199694
2007-08-30

Self-orienting guide shoe

#120
20070139217
2007-06-21

Data relay system for casing mounted sensors, actuators and generators

#121
20070132605
2007-06-14

Data relay system for instrument and controller attached to a drill string

#122
20070119626
2007-05-31

Apparatus and methods for drilling a wellbore using casing

#123
20070114031
2007-05-24

Completion apparatus and methods for use in hydrocarbon wells

#124
20070079995
2007-04-12

Cutting elements configured for casing component drillout and earth boring drill bits including same

#125
20070056774
2007-03-15

APPARATUS AND METHODS FOR DRILLING A WELLBORE USING CASING

#126
20060254778
2006-11-16

Method and system for tubing a borehole in single diameter

#127
20060124319
2006-06-15

Completion apparatus and methods for use in wellbores

#128
20060071809
2006-04-06

Method for collecting geological data from a well bore using casing mounted sensor

#129
20060070771
2006-04-06

Earth boring drill bits with casing component drill out capability and methods of use

#130
20050199426
2005-09-15

Rotatable drill shoe

#131
20050183892
2005-08-25

Casing and liner drilling bits

#132
20050092490
2005-05-05

Completion apparatus and methods for use in hydrocarbon wells

#133
18999711
2026-04-14

Baffle collar with double tapered lock ring

#134
18810298
2025-10-14

Limitless injection shoe

#135
18669272
2025-07-08

Off-bottom tubular shoe-track with shearable mechanisms

#136
17233655
2022-04-12

Interventionless methods and systems for testing a liner top