ClassID:

135307

E21B17/06 - page 2 - CPC Classification

Classification description:

Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings Cables; ; Tubings; Couplings; joints between rod and bit or between rod and rod Releasing-joints, e.g. safety joints

Recent Application in this class:
#301
20070023191
2007-02-01

Method and device for the controlled disconnection of a wireline

#302
20070023188
2007-02-01

Mill and pump-off sub

#303
20060278388
2006-12-14

Electrically controlled release device

#304
20060266205
2006-11-30

Explosive pipe severing tool

#305
20060196676
2006-09-07

Sliding sleeve devices and methods using O-ring seals as shear members

#306
20060131011
2006-06-22

Release mechanism for downhole tool

#307
20060124296
2006-06-15

Hyraulically releasable inflation tool for permanent bridge plug

#308
20060113083
2006-06-01

Downhole release tool and method

#309
20060082152
2006-04-20

Auto-release coupling head

#310
20060048940
2006-03-09

Downhole automatic tool release and method of use

#311
20050284635
2005-12-29

Firing head with detonation gas release activation

#312
20050268776
2005-12-08

Explosive pipe severing tool

#313
20050224226
2005-10-13

Force transfer apparatus to assist release of loaded member

#314
20050133217
2005-06-23

Hydraulically released inflation tool for permanent bridge plug

#315
20050126789
2005-06-16

System and method for fail-safe disconnect from a subsea well

#316
20050126775
2005-06-16

HYDRAULIC RELEASE RUNNING TOOL

#317
20050103501
2005-05-19

Disengageable downhole tool

#318
20050087338
2005-04-28

Disconnect device

#319
20050067163
2005-03-31

Monobore release for tubing conveyed perforating

#320
20050000693
2005-01-06

Release tool for coiled tubing

#321
19172191
2026-05-05

Preventing loss of hydrocarbon well conveyance string upon unintended connector decoupling

#322
17561405
2023-03-07

Downhole cutting tool positioning assemblies and methods to cut a tubular

#323
16423367
2019-10-08

Methods and systems for disconnecting and reconnecting casing

#324
16275993
2019-09-03

Methods and systems for disconnecting casing

#325
16005528
2020-06-23

Wellhead internal latch ring apparatus, system and method

#326
15348343
2020-05-05

Systems and methods for coupling and decoupling drill heads for ground loop preparation for geothermal applications

#327
14675281
2016-02-23

In-well disconnect tool

#328
14608144
2016-02-09

Heavy duty riser connector assembly