ClassID:

135327

E21B17/12 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings; Wear protectors; Centralising devices, e.g. stabilisers Devices for placing or drawing out wear protectors

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

ROBUST DOWNHOLE PUMP BARREL

#2
20230417111
2023-12-28

Biased lug cartridge, wear bushing with biased lug cartridge, and system and method using the same

#3
20230094755
2023-03-30

Modular bowl protector

#4
20220003049
2022-01-06

Protector for the ends of an elongate member

#5
20200318460
2020-10-08

Wear bushing deployment and retrieval tool for subsea wellhead

#6
20190242217
2019-08-08

Wear bushing deployment and retrieval tool for subsea wellhead

#7
20180266193
2018-09-20

Device arranged for attaching a pipe stem on a tubular body

#8
20180238121
2018-08-23

Dual bit run bushing system and method

#9
20180002993
2018-01-04

Wear bushing retrieving system and method

#10
20170247956
2017-08-31

Securing mechanism for rotary assembly wear sleeves

#11
20170183922
2017-06-29

Wear bushing retrieval tool

#12
20150191982
2015-07-09

Device arranged for attaching a pipe stem on a tubular body

#13
20140158372
2014-06-12

Bladder type crimper

#14
20130319686
2013-12-05

Centralizer connector

#15
20130294843
2013-11-07

Helical drill bit for an auger of a ground excavation assembly, in particular for building excavated piles, and drilling method that uses such a bit

#16
20100243271
2010-09-30

Bit-run nominal seat protector and method of operating same

#17
20090314492
2009-12-24

Protection sleeve

#18
20080217063
2008-09-11

In-situ method of forming a non-rotating drill pipe protector assembly

#19
20060196036
2006-09-07

Method of creating a sleeve on tubing

#20
15495012
2017-12-26

Production risers having rigid inserts and systems and methods for using