Patents-Review.com
ClassID:

135515 ⎘

E21B33/143 - CPC Classification

Classification description:

Sealing or packing boreholes or wells in the borehole; Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes for underwater installations

Recent Application in this class:
#1
20250314146
2025-10-09

METHODS, APPARATUS AND SYSTEMS FOR CREATING WELLBORE PLUGS FOR ABANDONED WELLS

 #2
20240159124
2024-05-16

METHODS, APPARATUS AND SYSTEMS FOR CREATING WELLBORE PLUGS FOR ABANDONED WELLS

 #3
20240093571
2024-03-21

Methods, apparatus and systems for creating bismuth alloy plugs for abandoned wells

 #4
20230272689
2023-08-31

Methods, apparatus and systems for creating wellbore plugs for abandoned wells

 #5
20230228165
2023-07-20

System and method for hanger with debris pocket

 #6
20230117664
2023-04-20

Downhole apparatus and methods

 #7
20230003095
2023-01-05

Tool and method for cementing an annulus in a subsea oil or gas well

 #8
20220268127
2022-08-25

Downhole apparatus and methods for casing

 #9
20210164322
2021-06-03

Methods, apparatus and systems for creating wellbore plugs for abandoned wells

 #10
20210155841
2021-05-27

Methods, apparatus and systems for creating bismuth alloy plugs for abandoned wells

 #11
20210148190
2021-05-20

Methods, apparatus and systems for creating wellbore plugs for abandoned wells

 #12
20200277829
2020-09-03

Particulate dispenser

 #13
20190284899
2019-09-19

Top-down squeeze system and method

 #14
20190249518
2019-08-15

System and method for drilling a wellbore portion in a subterranean formation

 #15
20190194895
2019-06-27

METHODS AND APPARATUS FOR FORMING AN OFFSHORE WELL

 #16
20190085654
2019-03-21

Managed pressure reverse cementing

 #17
20190032427
2019-01-31

Apparatus and methods for supporting a subsea well

 #18
20180347135
2018-12-06

Offshore drilling and a configurable support structure for the same

 #19
20180245426
2018-08-30

Top-down squeeze system and method

 #20
20180223622
2018-08-09

Wellbore cement management system

 #21
20180196898
2018-07-12

Software simulation method for estimating fluid positions and pressures in the wellbore for a dual gradient cementing system

 #22
20180187511
2018-07-05

Tieback cementing plug system

 #23
20180142525
2018-05-24

Particulate dispenser

 #24
20180045018
2018-02-15

TIEBACK CEMENTING PLUG SYSTEM

 #25
20170335653
2017-11-23

Method of extracting underground resources and hydrolysis-blocking agent for use in the method

 #26
20170247976
2017-08-31

Drainage for a telescope section of a landing string

 #27
20170247971
2017-08-31

Downhole sealing tool

 #28
20160145995
2016-05-26

Managed pressure cementing

 #29
20160076341
2016-03-17

Cementing system for riserless abandonment operation

 #30
20150330181
2015-11-19

Surge immune stage system for wellbore tubular cementation

 #31
20150267504
2015-09-24

Cement pulsation for subsea wellbore

 #32
20150252650
2015-09-10

Tieback cementing plug system

 #33
20150184461
2015-07-02

Subsea drilling with casing

 #34
20150060078
2015-03-05

Subsea drilling with casing

 #35
20140326454
2014-11-06

Methods and apparatus for wellbore construction and completion

 #36
20140251630
2014-09-11

Wellhead seal assembly lockdown system

 #37
20140090853
2014-04-03

Subsea well containment systems and methods

 #38
20140069656
2014-03-13

Systems and methods for detecting leaks in subsea cement and wellbore equipment

 #39
20130220609
2013-08-29

Hard bottom cement seal for improved well control

 #40
20130118752
2013-05-16

Managed pressure cementing

 #41
20120211232
2012-08-23

Subsea conductor anchor

 #42
20120138298
2012-06-07

Methods and apparatus for wellbore construction and completion

 #43
20110299930
2011-12-08

SUBSEA OIL LEAK STABILIZATION SYSTEM AND METHOD

 #44
20110253388
2011-10-20

Insertion of a pack-off into a wellhead

 #45
20110253381
2011-10-20

Subsea wellhead with segmented fatigue reduction sleeve

 #46
20110253378
2011-10-20

Subsea wellhead providing controlled access to a casing annulus

 #47
20100163252
2010-07-01

Method and composition for zonal isolation of a well

 #48
20100126776
2010-05-27

Subsea drilling with casing

 #49
20080128140
2008-06-05

Method and apparatus for wellbore construction and completion

 #50
20080084783
2008-04-10

Process control architecture with hydrodynamic correction

 #51
18147876
2023-10-10

Subsea coiled tubing drilling system and subsea drilling device thereof

 #52
14995321
2017-06-06

Batch drilling using multiple mudline closure devices