ClassID:

135419

E21B25/06 - CPC Classification

Classification description:

Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver having a flexible liner or inflatable retaining means

Recent Application in this class:
#1
20260153007
2026-06-04

CORING ASSEMBLY FOR EXTRATERRESTRIAL DRILLING AND PREPARATION METHOD THEREOF

#2
20240352817
2024-10-24

SYSTEMS AND METHODS FOR CORE FLOODING

#3
20220213739
2022-07-07

Drilling mechanism of coring drilling rig

#4
20220090460
2022-03-24

SYSTEMS AND METHODS FOR CORE FLOODING

#5
20210381328
2021-12-09

Systems and methods for core flooding

#6
20210310323
2021-10-07

Suction-activated core catcher and related methods

#7
20200181999
2020-06-11

Deep rock in-situ active thermal-insulation coring device and thermal-insulation coring method thereof

#8
20200131875
2020-04-30

Process for drilling natural gas hydrates with submersible core drilling rig using pressure wireline

#9
20190264520
2019-08-29

DOWNHOLE TOOL WITH PROTECTIVE COVERING

#10
20190211637
2019-07-11

Measuring formation porosity and permeability

#11
20180148988
2018-05-31

Sealed core storage and testing device for a downhole tool

#12
20170362908
2017-12-21

Cryogenic core collection

#13
20170152714
2017-06-01

CORING TOOLS EXHIBITING REDUCED ROTATIONAL ECCENTRICITY AND RELATED METHODS

#14
20160299050
2016-10-13

Measuring formation porosity and permeability

#15
20160245030
2016-08-25

Sponge liner sleeves for a core barrel assembly, sponge liners and related methods

#16
20160194928
2016-07-07

Sponge pressure equalization system

#17
20140311805
2014-10-23

Methods and apparatus for coring

#18
20140305712
2014-10-16

Pressure core barrel for retention of core fluids and related method

#19
20130081878
2013-04-04

Methods and apparatus for coring

#20
20120261192
2012-10-18

Core drill and coring method

#21
20060169496
2006-08-03

Apparatus and methods for sponge coring

#22
20060169494
2006-08-03

Apparatus and methods for sponge coring

#23
20050133275
2005-06-23

Apparatus and methods for sponge coring

#24
20050133267
2005-06-23

[CORING TOOL WITH RETENTION DEVICE]

#25
14508830
2018-01-09

Soil sampler lay flat sheet liner system