E21B7/208 - CPC Classification Index

#1

20240426072

2024-12-26

A DETACHABLE FLUIDISATION DEVICE

#2

20240328260

2024-10-03

FLUID OPERATED MOTOR FOR RUNNING CASING WITH BYPASS FOR PUMPING LOST CIRCULATION MATERIAL

#3

20240295149

2024-09-05

In-situ detection robot and detection method for geological information without disturbance of in-situ stress

#4

20220098929

2022-03-31

Tapered Transitional Radial Support for Drilling Tools

#5

20220081973

2022-03-17

Drillable adaptive turbine guide shoe

#6

20210324685

2021-10-21

INTERLOCKING TUBULAR WITH SECTIONED PARTS AND RELATED METHOD

#7

20210071515

2021-03-11

Modified casing running tool and method of using the same

#8

20210062635

2021-03-04

Automatic compensation for surge and swab during pipe movement in managed pressure drilling operation

#9

20200157888

2020-05-21

System and method for casing drilling with a subsea casing drive

#10

20190153783

2019-05-23

Annular pressure reduction system for horizontal directional drilling

#11

20190085656

2019-03-21

Drill string apparatus with integrated annular barrier and port collar, methods, and systems

#12

20180371839

2018-12-27

High torque constant velocity joint for downhole drilling power transmission

#13

20180171722

2018-06-21

WELL DRILLING SYSTEM

#14

20180106111

2018-04-19

Seabed drilling system

#15

20180038194

2018-02-08

Method and apparatus for sealing tubulars

#16

20180010390

2018-01-11

Apparatus and method for drilling a directional borehole in the ground

#17

20170306719

2017-10-26

Drill string apparatus with integrated annular barrier and port collar, methods, and systems

#18

20170226828

2017-08-10

Assembly and method for creating an expanded tubular element in a borehole

#19

20170198526

2017-07-13

SUBSEA CASING DRILLING SYSTEM

#20

20170081923

2017-03-23

Drilling tool

#21

20170051561

2017-02-23

SUBSEA CASING DRILLING SYSTEM

#22

20160326807

2016-11-10

Directional drilling while conveying a lining member, with latching parking capabilities for multiple trips

#23

20160194848

2016-07-07

METHOD AND DEVICE FOR PRODUCING A FOUNDATION ELEMENT IN THE GROUND

#24

20160168915

2016-06-16

System for non-destructive penetration of a substrate

#25

20150330151

2015-11-19

Apparatus for drilling and lining a borehole

#26

20150184461

2015-07-02

Subsea drilling with casing

#27

20150060078

2015-03-05

Subsea drilling with casing

#28

20140262340

2014-09-18

METHODS AND SYSTEMS FOR DRILLING FROM UNDERGROUND ACCESS TUNNELS TO DEVELOP SUBTERRANEAN HYDROCARBON RESERVOIRS

#29

20140196900

2014-07-17

Method and apparatus for sealing tubulars

#30

20130233547

2013-09-12

Subsea casing drilling system

#31

20130233534

2013-09-12

Latch assembly

#32

20130051922

2013-02-28

Method and device for laying pipelines in the ground

#33

20120186816

2012-07-26

Single-assembly system and method for one-trip drilling, casing, cementing and perforating

#34

20120168228

2012-07-05

Apparatus and methods for drilling a wellbore using casing

#35

20120141211

2012-06-07

Method and device for laying pipelines in the ground

#36

20110240373

2011-10-06

Down-the-hole drill hammer having an extendable drill bit assembly

#37

20110168447

2011-07-14

Reaming tool

#38

20110011646

2011-01-20

Apparatus and methods for drilling a wellbore using casing

#39

20100126776

2010-05-27

Subsea drilling with casing

#40

20090288821

2009-11-26

Monitoring flow rates while retrieving bottom hole assembly during casing while drilling operations

#41

20090188722

2009-07-30

Drilling device for drilling and reaming of a hole

#42

20090025981

2009-01-29

Method for drilling with casing

#43

20080314644

2008-12-25

Device for a Borehole Arrangement

#44

20080164066

2008-07-10

Method and device for producing a cased string bore

#45

20080115939

2008-05-22

Radial Expansion of Tubular Members

#46

20080110673

2008-05-15

Apparatus and methods for drilling a wellbore using casing

#47

20080093124

2008-04-24

Apparatus and methods for drilling a wellbore using casing

#48

20070267221

2007-11-22

Methods and apparatus for drilling with casing

#49

20070119626

2007-05-31

Apparatus and methods for drilling a wellbore using casing

#50

20070107941

2007-05-17

EXTENDED REACH DRILLING APPARATUS & METHOD

#51

20070056774

2007-03-15

APPARATUS AND METHODS FOR DRILLING A WELLBORE USING CASING

#52

20070051538

2007-03-08

Method for drilling with casing

#53

20070034412

2007-02-15

Latchable reaming bit

#54

20070034408

2007-02-15

Method of creating a borehole in an earth formation

#55

20070023204

2007-02-01

Method and device for drilling holes in soil or rock material

#56

20060283633

2006-12-21

Method and apparatus for conducting earth borehole operations using coiled casing

#57

20050161222

2005-07-28

Apparatus and methods for forming a lateral wellbore

#58

20050155771

2005-07-21

Apparatus and methods for expanding tubulars in a wellbore

#59

20050126826

2005-06-16

Directional casing and liner drilling with mud motor

#60

20050098323

2005-05-12

Forming a wellbore casing while simultaneously drilling a wellbore

#61