Patents-Review.com
ClassID:

135374 ⎘

E21B21/002 - CPC Classification

Classification description:

Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor Down-hole drilling fluid separation systems

Recent Application in this class:
#1
20260117609
2026-04-30

DOWNHOLE FLUID SEPARATION FOR DRILLING A WELL IN A HOT SUBTERRANEAN ZONE

 #2
20260028898
2026-01-29

Systems and Methods for Separating and Storing Downhole Debris

 #3
20250314166
2025-10-09

METHODS OF SWABBING LIQUID LOADED WELLS, AND KILLING WELLS, WITH THE USE OF COMPRESSION PUMPS, REGULATORS AND FILTRATION TECHNIQUES

 #4
20250101818
2025-03-27

APPARATUS AND METHOD FOR CLEARING SOLIDS FROM A WELL

 #5
20250101817
2025-03-27

LEVELING SYSTEM FOR FLOW DIVERTER AND SEPARATOR FOR DOWNHOLE SEPARATION IN A MULTILATERAL WELL

 #6
20240410276
2024-12-12

ELECTROMECHANICAL ACTUATOR AND METHOD OF USE

 #7
20240175350
2024-05-30

Downhole filtration systems and related methods in oil and gas applications

 #8
20240084653
2024-03-14

Drilling system with annular flush separation device and method

 #9
20240068308
2024-02-29

FULL-FACE SHAFT TUNNEL BORING MACHINE SYSTEM

 #10
20240044227
2024-02-08

Apparatus and method for removing debris from a well bore

 #11
20230235650
2023-07-27

Fluid Conditioning and/or Treatment System

 #12
20230193703
2023-06-22

SPHERICAL SAND SEPARATOR FOR PETROLEUM AND NATURAL GAS WELLS

 #13
20230114032
2023-04-13

System and method for removing debris from a drilling fluid

 #14
20230107576
2023-04-06

DRILLING TURBINE AND METHOD OF DIRECTIONAL DRILLING

 #15
20230084306
2023-03-16

System and method for electromechanical actuator apparatus having a screen assembly

 #16
20220112778
2022-04-14

Identifying downhole conditions during a drilling operation using a vibratory separator

 #17
20210285325
2021-09-16

Laser-based monitoring tool

 #18
20210285294
2021-09-16

Laser tool with purging head

 #19
20210222047
2021-07-22

Wellbore treatment fluids with no-heat liquid solder additives

 #20
20210115746
2021-04-22

Systems and methods for removing and collecting magnetic debris from drilling fluid

 #21
20210062648
2021-03-04

Oil well monitoring apparatus and method

 #22
20210032525
2021-02-04

Spacer fluids and cement slurries that include surfactants

 #23
20200407621
2020-12-31

EMULSIFIED DRILLING FLUIDS AND METHODS OF MAKING AND USE THEREOF

 #24
20200392802
2020-12-17

Multi-component downhole treatment

 #25
20200332631
2020-10-22

Integrated pump and compressor and method of producing multiphase well fluid downhole and at surface

 #26
20200291285
2020-09-17

Development of retarded acid system

 #27
20200248539
2020-08-06

Integrated Pump and Compressor and Method of Producing Multiphase Well Fluid Downhole and at Surface

 #28
20200248061
2020-08-06

Lubricants for water-based drilling fluids

 #29
20200165504
2020-05-28

Spacer fluid compositions that include surfactants

 #30
20200140739
2020-05-07

Methods of using drilling fluid compositions with enhanced rheology

 #31
20200102809
2020-04-02

Apparatus and method for removing debris from a wellbore

 #32
20200095491
2020-03-26

Development of anti-bit balling fluids

 #33
20200087996
2020-03-19

Diffuser assembly with vibration feature

 #34
20200087560
2020-03-19

Emulsifier compositions for invert emulsion fluids and methods of using the same

 #35
20200040247
2020-02-06

Development of anti-bit balling fluids

 #36
20190316445
2019-10-17

System, method, and device for powering electronics during completion and production of a well

 #37
20190309597
2019-10-10

Method and apparatus for fracking and producing a well

 #38
20190309210
2019-10-10

Development of anti-bit balling fluids

 #39
20190301267
2019-10-03

System and method for electromechanical actuator apparatus having a screen assembly

 #40
20190292432
2019-09-26

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #41
20190292431
2019-09-26

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #42
20190233708
2019-08-01

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #43
20190233707
2019-08-01

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #44
20190203096
2019-07-04

Cement slurries, cured cements and methods of making and use thereof

 #45
20190203095
2019-07-04

Cement slurries, cured cements and methods of making and use thereof

 #46
20190092996
2019-03-28

DISPERSANT IN CEMENT FORMULATIONS FOR OIL AND GAS WELLS

 #47
20190063189
2019-02-28

APPARATUS, SYSTEM AND METHOD FOR DEBRIS REMOVAL

 #48
20180320063
2018-11-08

Development of retarded acid system

 #49
20180320050
2018-11-08

Methods of using drilling fluid compositions with enhanced rheology

 #50
20180312439
2018-11-01

Dispersant in cement formulations for oil and gas wells

 #51
20180282216
2018-10-04

Dispersant in cement formulations for oil and gas wells

 #52
20180266231
2018-09-20

Solids control methods, apparatus and systems

 #53
20180223175
2018-08-09

Retarded acid systems, emulsions, and methods for using in acidizing carbonate formations

 #54
20180223169
2018-08-09

Spacer fluid compositions that include surfactants

 #55
20180223168
2018-08-09

Spacer fluids and cement slurries that include surfactants

 #56
20180223167
2018-08-09

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #57
20180223166
2018-08-09

Invert emulsion based drilling fluid and methods of using same

 #58
20180223165
2018-08-09

Emulsifier compositions for invert emulsion fluids and methods of using the same

 #59
20180223162
2018-08-09

Development of anti-bit balling fluids

 #60
20180223161
2018-08-09

Development of anti-bit balling fluids

 #61
20180223160
2018-08-09

Anti-bit balling drilling fluids, and methods of making and use thereof

 #62
20180223159
2018-08-09

Anti-bit balling drilling fluids, and methods of making and use thereof

 #63
20180223158
2018-08-09

Drilling fluid compositions with enhanced rheology and methods of using same

 #64
20180223156
2018-08-09

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #65
20180223153
2018-08-09

Lubricants for water-based drilling fluids

 #66
20180222797
2018-08-09

Cement slurries, cured cement and methods of making and use thereof

 #67
20180222796
2018-08-09

Cement slurries, cured cements and methods of making and use thereof

 #68
20180135388
2018-05-17

Modular downhole debris separating assemblies

 #69
20180135371
2018-05-17

Debris catcher

 #70
20180128067
2018-05-10

Self-cleaning filter

 #71
20180119514
2018-05-03

Fish through filter device

 #72
20180112508
2018-04-26

Systems and apparatuses for separating wellbore fluids and solids during production

 #73
20180038210
2018-02-08

Integrated pump and compressor and method of producing multiphase well fluid downhole and at surface

 #74
20180016485
2018-01-18

Barrier pills

 #75
20170275959
2017-09-28

Drilling debris separator

 #76
20170240790
2017-08-24

Rare earth-containing compounds to enhance performance of downhole treatment compositions

 #77
20170218735
2017-08-03

Longitudinally offset partial areas screens for well assembly

 #78
20170114266
2017-04-27

Rare earth-containing compounds to enhance performance of downhole treatment compositions

 #79
20170045156
2017-02-16

Method and device for trenchless pipe laying

 #80
20160290066
2016-10-06

Shock absorbing UBHO/pulser sub assembly with optional mud filter

 #81
20160264837
2016-09-15

Segregating fluids, methods of making, and methods of use

 #82
20160168933
2016-06-16

INTELLIGENT SENSOR SYSTEMS AND METHODS

 #83
20160160569
2016-06-09

Rotary drill bit air/water separator

 #84
20160108686
2016-04-21

Dual circulation drilling system

 #85
20150369024
2015-12-24

Method of completing a well

 #86
20150267511
2015-09-24

Drill pipe screens

 #87
20150247383
2015-09-03

Consolidating spacer fluids and methods of use

 #88
20150204150
2015-07-23

APPARATUS AND METHODS FOR USE WITH DRILLING FLUIDS

 #89
20150107838
2015-04-23

Consolidating Spacer Fluids and Methods of Use

 #90
20150101803
2015-04-16

METHOD AND SYSTEM FOR SEALING AN ANNULUS ENCLOSING A TUBULAR ELEMENT

 #91
20150075799
2015-03-19

Downhole debris retriever

 #92
20150068741
2015-03-12

Downhole gas separator

 #93
20140326445
2014-11-06

Subterranean tool with sealed electronic passage across multiple sections

 #94
20140182943
2014-07-03

Continuous flow drilling systems and methods

 #95
20140174723
2014-06-26

Defoaming agent compositions and methods of making and using same

 #96
20140102699
2014-04-17

Defoaming agent compositions and methods of making and using same

 #97
20140014343
2014-01-16

Systems and methods for managing milling debris

 #98
20120318495
2012-12-20

Subterranean tool with sealed electronic passage across multiple sections

 #99
20120273277
2012-11-01

METHOD OF DRILLING AND JET DRILLILNG SYSTEM

 #100
20120255792
2012-10-11

METHOD OF DRILLING AND JET DRILLING SYSTEM

 #101
20120255791
2012-10-11

METHOD OF DRILLING AND ABRASIVE JET DRILLING ASSEMBLY

 #102
20120255724
2012-10-11

Downhole tool for borehole cleaning or for moving fluid in a borehole

 #103
20120217068
2012-08-30

Lateral well drilling apparatus and method

 #104
20120175111
2012-07-12

Fish-thru screen apparatus and method

 #105
20120118570
2012-05-17

Device for a downhole apparatus for machining of casings and also a method of depositing machined shavings

 #106
20120061087
2012-03-15

Continuous flow drilling systems and methods

 #107
20110180328
2011-07-28

SPEED CONTROL BAFFLE FOR USE IN A HYDRAULIC-ROTARY DRILLING SYSTEM

 #108
20100258353
2010-10-14

Air/water separator and methods of use thereof

 #109
20100175924
2010-07-15

Apparatus and method for improvements in wellbore drilling

 #110
20100116553
2010-05-13

System for managing variable density drilling mud

 #111
20100116552
2010-05-13

Methods and apparatus for download transfer of drill cuttings

 #112
20100108389
2010-05-06

Distance holder with helical slot

 #113
20100078217
2010-04-01

Method and assembly for abrasive jet drilling

 #114
20100018775
2010-01-28

Drilling tool with fluid cleaner

 #115
20090308607
2009-12-17

System and method for maintaining operability of a downhole actuator

 #116
20090283330
2009-11-19

Downhole material retention apparatus

 #117
20090050374
2009-02-26

Method and apparatus for managing variable density drilling mud

 #118
20090045124
2009-02-19

Screen Apparatus and Method

 #119
20090025930
2009-01-29

Continuous flow drilling systems and methods

 #120
20080110614
2008-05-15

Wellbore filter for submersible motor-driver pump

 #121
20080087433
2008-04-17

Screen apparatus and method

 #122
20070187152
2007-08-16

Rock drill water separator

 #123
20070131455
2007-06-14

Nozzle unit and method for excavating a hole in an object

 #124
20060213667
2006-09-28

Screen apparatus and method

 #125
20060185907
2006-08-24

Device for transporting particles of a magnetic material and tool comprising such a device

 #126
20060065444
2006-03-30

Filter for a drill string

 #127
20060065443
2006-03-30

Drilling fluid filter

 #128
20050121233
2005-06-09

Filter assembly having a bypass passageway and method

 #129
20050109503
2005-05-26

Drill pipe screen

 #130
18786295
2026-01-20

Systems and methods for separating and storing downhole debris

 #131
16529106
2019-12-24

Spinning gas-separator for drilling fluid

 #132
16392066
2022-03-29

Filter sub

 #133
14987013
2016-11-15

Spinning gas separator for drilling fluid