Patents-Review.com
ClassID:

135464 ⎘

E21B33/0375 - CPC Classification

Classification description:

Sealing or packing boreholes or wells; Surface sealing or packing; Well heads; Setting-up thereof specially adapted for underwater installations; Protective housings therefor Corrosion protection means

Recent Application in this class:
#1
20250154945
2025-05-15

ROBUST DOWNHOLE PUMP BARREL

 #2
20190056055
2019-02-21

Corrosion protection element for downhole connections

 #3
20190017344
2019-01-17

Shear rams for a blowout preventer

 #4
20190017343
2019-01-17

Shear rams for a blowout preventer

 #5
20180283142
2018-10-04

Downhole tools having controlled degradation and method

 #6
20180283141
2018-10-04

Downhole tools having controlled degradation and method

 #7
20170321510
2017-11-09

Wellhead system and joints

 #8
20170145787
2017-05-25

METHOD AND SYSTEM FOR REDUCING HEAT LOSS FROM SUBSEA STRUCTURES

 #9
20150329974
2015-11-19

System, apparatus, and method for utilization of bracelet galvanic anodes to protect subterranean well casing sections shielded by cement at a cellar area

 #10
20140246202
2014-09-04

Method and device for extending lifetime of a wellhead

 #11
20140049399
2014-02-20

Power supply and voltage multiplication for submerged subsea systems based on cathodic protection system

 #12
20130146302
2013-06-13

Controlled electrolytic degredation of downhole tools

 #13
20130081955
2013-04-04

System, apparatus, and method for utilization of bracelet galvanic anodes to protect subterranean well casing sections shielded by cement at a cellar area

 #14
20130011659
2013-01-10

Methods of forming protecting coatings on substrate surfaces

 #15
20110159217
2011-06-30

Method and system for reducing heat loss from subsea structures

 #16
20090056950
2009-03-05

Means of preventing marine fouling of subsea connectors

 #17
18049528
2023-07-04

Systems and methods for a mudline suspension system corrosion cap and running tool with shearing screws