E21B10/327 - CPC Classification Index

ClassID:

135228 ⎘

E21B10/327 - 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 pivoted about a longitudinal axis

Recent Application in this class:

20260015912

2026-01-15

DRILLING APPARATUS WITH WINGS

20250043636

2025-02-06

DRILLING TOOL AND METHOD FOR PRODUCING A BORE IN THE GROUND

20240384603

2024-11-21

Wellbore Notching Assembly

20230167691

2023-06-01

Radial cutting assembly for drilling tool

20230046295

2023-02-16

PILEDRIVER MODULES, ADAPTIVE PILE DRIVER SYSTEM AND CORRESPONDING METHOD

20220178208

2022-06-09

Wellbore notching assembly

20220126627

2022-04-28

CONNECTED DEPLOYABLE ARMS OFF OF CYLINDRICAL SURFACES FOR INCREASED MOBILITY

20220049556

2022-02-17

Post hole belling auger

20190242190

2019-08-08

Over-bit reamer

#10

20170089143

2017-03-30

Over-bit reamer

#11

20160258221

2016-09-08

Expandable diameter drill bit

#12

20160102502

2016-04-14

Underreamer with adjustable cutter block expansion

#13

20150008041

2015-01-08

High Stiffness Tool For Expanding A Wellbore

#14

20140311802

2014-10-23

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

#15

20140227043

2014-08-14

Apparatus and method for installing ground anchoring systems

#16

20130299248

2013-11-14

Adjustable body supported cutter arms for underreamer

#17

20130008721

2013-01-10

Apparatus and method for installing ground anchoring systems

#18

20100236831

2010-09-23

Excavation tool

#19

20080302577

2008-12-11

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

#20

20070261892

2007-11-15

Device for a drilling tool