ClassID:

135188

E21B7/185 - CPC Classification

Classification description:

Special methods or apparatus for drilling; Drilling by liquid or gas jets, with or without entrained pellets underwater

Recent Application in this class:
#1
20250146364
2025-05-08

SYSTEM AND METHOD FOR CONSTRUCTION AND COMPLETION OF PRODUCTION AND INJECTION WELLS IN THE PRE-SALT FIELDS

#2
20240209691
2024-06-27

System and method for construction and completion of production and injection wells in the pre-salt fields

#3
20230304383
2023-09-28

Suction cylinder exploitation device and method for marine natural gas hydrates

#4
20210348482
2021-11-11

Resource collection system

#5
20210222495
2021-07-22

Method and apparatus for the bottom-up construction of vertical risers from underground passes through the soil, using a pipe jacking equipment

#6
20200291754
2020-09-17

Hydrate solid-state fluidization mining method and system under underbalanced reverse circulation condition

#7
20200080383
2020-03-12

Abrasive suspension eroding system

#8
20190277101
2019-09-12

PLUG AND PLAY CONNECTION SYSTEM FOR A BELOW-TENSION-RING MANAGED PRESSURE DRILLING SYSTEM

#9
20190256173
2019-08-22

Offshore drilling system, vessel and method

#10
20190023359
2019-01-24

Offshore drilling system, vessel and method

#11
20180058036
2018-03-01

Jet trenching system

#12
20170341717
2017-11-30

Offshore drilling system, vessel and method

#13
20170335649
2017-11-23

Subsea slanted wellhead system and BOP system with dual injector head units

#14
20170190387
2017-07-06

Corrosion-and-chafing-resistant, buoy system and method

#15
20150314833
2015-11-05

CORROSION-AND-CHAFING-RESISTANT, MOORING SYSTEM AND METHOD

#16
20150122501
2015-05-07

Pipe cutting apparatuses and related methods

#17
20140353036
2014-12-04

Apparatus and Method for Measuring Inclination in Subsea Running, Setting, and Testing Tools

#18
20110299930
2011-12-08

SUBSEA OIL LEAK STABILIZATION SYSTEM AND METHOD

#19
20100275596
2010-11-04

SYSTEM FOR EXPLOITING THE THERMAL ENERGY AT THE BOTTOM OF THE OCEAN

#20
20090078466
2009-03-26

Apparatus and method for driving casing or conductor pipe

#21
20060260809
2006-11-23

Method and apparatus for replacing drive pipe

#22
16130263
2019-04-30

Plug and play connection system for a below-tension-ring managed pressure drilling system