ClassID:

135165

E21B7/043 - CPC Classification

Classification description:

Special methods or apparatus for drilling; Directional drilling for underwater installations

Recent Application in this class:
#1
20200040710
2020-02-06

Device and method for solid-state fluidized mining of natural gas hydrates in shallow seabed

#2
20190048703
2019-02-14

REAL-TIME OPTIMIZATION AND VISUALIZATION OF PARAMETERS FOR DRILLING OPERATIONS

#3
20180066475
2018-03-08

Systems and methods for sensorless state estimation, disturbance estimation, and model adaption for rotary steerable drilling systems

#4
20170335649
2017-11-23

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

#5
20160369625
2016-12-22

Crustal and disturbance field survey correction

#6
20160222735
2016-08-04

MEGAN UNDERWATER DRILLING STRUCTURES AND METHODS

#7
20150372470
2015-12-24

Inclined conductor device

#8
20150267474
2015-09-24

Method and system for transporting a hydrocarbon fluid

#9
20130008664
2013-01-10

Above mudline whipstock for marine platform drilling operations

#10
20100132938
2010-06-03

CONDUCTOR PIPE STRING DEFLECTOR AND METHOD OF USING SAME

#11
20100018770
2010-01-28

System and Method for Drilling a Borehole

#12
20090266559
2009-10-29

METHOD AND APPARATUS FOR INSTALLING DEFLECTING CONDUCTOR PIPE

#13
20090223715
2009-09-10

CONDUCTOR PIPE STRING DEFLECTOR AND METHOD

#14
20080115975
2008-05-22

Systems and methods employing a variable angle guide for a drill

#15
20060243485
2006-11-02

Conductor pipe string deflector and method

#16
20060243436
2006-11-02

Conductor pipe string deflector and method of using same

#17
20050152749
2005-07-14

Telescopic guide pipe for offshore drilling

#18
20050002740
2005-01-06

Guide device in an offshore drilling installation