E21B11/00 - CPC Classification Index

ClassID:

135272 ⎘

E21B11/00 - CPC Classification

Classification description:

Other drilling tools

Sub-classes:

E21B11/005 » {Hand operated drilling tools} 82
E21B11/02 » Boring rams 7
E21B11/06 » with driven cutting chains or similarly driven tools 6

Recent Application in this class:

20260092516

2026-04-02

WELL INTEGRITY TESTING TOOL

20230212931

2023-07-06

Self-regulating frac pump suction stabilizer/dampener

20220195813

2022-06-23

Rotational vibration absorber with tangential dampers cap

20210404276

2021-12-30

Multi-tooth jaw, torque stopper device and repair kit thereof for preventing rotation of downhole tools suspended in wellbore casing

20210214965

2021-07-15

FENCE CONSTRUCTION DEVICE AND METHOD

20200232303

2020-07-23

Rotating cutter apparatus for reducing the size of solid objects in a fluid

20170074043

2017-03-16

Method and apparatus for increasing well productivity

20170030147

2017-02-02

REAMING SYSTEM

20150167463

2015-06-18

Drill rig

#10

20150027780

2015-01-29

One trip drill and casing scrape method and apparatus

#11

20150008928

2015-01-08

Electronics for a thin bed array induction logging system

#12

20140015530

2014-01-16

Electronics for a thin bed array induction logging system

#13

20110247816

2011-10-13

Method and Apparatus for Increasing Well Productivity

#14

20090035079

2009-02-05

Removable countersink bit