Patents-Review.com
ClassID:

135227 ⎘

E21B10/325 - CPC Classification

Classification description:

Drill bits; Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being shifted by a spring mechanism

Recent Application in this class:
#1
20230125843
2023-04-27

Modular casing reamer shoe system with jarring capability

 #2
20230117681
2023-04-20

Depth of cut control activation system

 #3
20220259926
2022-08-18

Drill bit with multiple cutting structures

 #4
20220056764
2022-02-24

Hybrid reamer and stabilizer

 #5
20220042389
2022-02-10

Milling packers below restrictions in a wellbore casing

 #6
20210301597
2021-09-30

Deploying material to limit losses of drilling fluid in a wellbore

 #7
20200362641
2020-11-19

Liquid injection type reamer bit

 #8
20200240215
2020-07-30

Underreamer

 #9
20190368275
2019-12-05

Internal reamer for anchor shaft hole for mining

 #10
20190360280
2019-11-28

Multifunction wellbore conditioning tool

 #11
20190242188
2019-08-08

Anti-rotation pads with flow ports

 #12
20190178055
2019-06-13

Actuation system controlled using rotational speed

 #13
20190160707
2019-05-30

Hole drilling device for forming expanded-diameter hole portion

 #14
20190145177
2019-05-16

Modular earth-boring tools, modules for such tools and related methods

 #15
20190055787
2019-02-21

Underreamer cutter block

 #16
20190055786
2019-02-21

Underreamer cutter block

 #17
20190032410
2019-01-31

Rotatable cutters and elements for use on earth-boring tools in subterranean boreholes, earth-boring tools including same, and related methods

 #18
20190032408
2019-01-31

Movable cutters and devices including one or more seals for use on earth-boring tools in subterranean boreholes and related methods

 #19
20190032407
2019-01-31

Cutting element assemblies comprising rotatable cutting elements and earth-boring tools comprising such cutting element assemblies

 #20
20180179825
2018-06-28

Rotary cutting tool

 #21
20180163480
2018-06-14

Drilling system drag member for simultaneous drilling and reaming

 #22
20170152712
2017-06-01

DUAL PRECISION UNDER REAMER

 #23
20160281436
2016-09-29

Expandable reamers having nonlinearly expandable blades, and related methods

 #24
20160258221
2016-09-08

Expandable diameter drill bit

 #25
20160251899
2016-09-01

Axially separating drill bucket

 #26
20160153242
2016-06-02

Expandable reamers and methods of using expandable reamers

 #27
20160145973
2016-05-26

Downhole cleaning tool and cleaning method

 #28
20150330182
2015-11-19

Hydraulic activation of mechanically operated bottom hole assembly tool

 #29
20150152686
2015-06-04

Selectively actuating expandable reamers and related methods

 #30
20150083497
2015-03-26

Hydraulic activation of mechanically operated bottom hole assembly tool

 #31
20150068753
2015-03-12

Apparatus and method for solution mining using cycling process

 #32
20140374170
2014-12-25

Underreamer Apparatus and Method

 #33
20140338981
2014-11-20

Tools for use in subterranean boreholes having expandable members and related methods

 #34
20140262522
2014-09-18

Axially separating drill bucket

 #35
20140262277
2014-09-18

Downhole tool for debris removal

 #36
20140246236
2014-09-04

Expandable reamer assemblies, bottom-hole assemblies, and related methods

 #37
20140131109
2014-05-15

Adjustable diameter underreamer and methods of use

 #38
20140116712
2014-05-01

Deburring mill tool for wellbore cleaning

 #39
20140102797
2014-04-17

Selective deployment of underreamers and stabilizers

 #40
20130292108
2013-11-07

Oilfield downhole wellbore section mill

 #41
20130256035
2013-10-03

Expandable reamers and methods of using expandable reamers

 #42
20130220615
2013-08-29

INTERNAL TUBING CUTTER

 #43
20130153300
2013-06-20

Selectively actuating expandable reamers and related methods

 #44
20120205157
2012-08-16

Tools for use in subterranean boreholes having expandable members and related methods

 #45
20110073330
2011-03-31

Earth-boring tools having expandable members and related methods

 #46
20080302577
2008-12-11

Drill bit with radially expandable cutter, and method of using same

 #47
20080245574
2008-10-09

Drilling and hole enlargement device

 #48
20070163809
2007-07-19

Drilling and hole enlargement device

 #49
20070163808
2007-07-19

Drilling and hole enlargement device

 #50
20050241858
2005-11-03

Apparatus and method for drilling and reaming a borehole

 #51
20050028982
2005-02-10

Disengagable burr mill

 #52
15663493
2018-10-16

Rotatable cutting elements for earth-boring tools and earth-boring tools so equipped