ClassID:

135431

E21B29/00 - page 2 - CPC Classification

Classification description:

Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows ; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground

Recent Application in this class:
#301
20110284224
2011-11-24

Cutting dart and method of using the cutting dart

#302
20110278020
2011-11-17

Shearing tool and methods of use

#303
20110240294
2011-10-06

PIPE PERFORATING APPARATUS AND METHOD

#304
20110209540
2011-09-01

Method of cutting and testing a pipeline cut under water or under a seabed

#305
20110203850
2011-08-25

Methods of drilling using differing types of cutting elements

#306
20110150577
2011-06-23

Tool for longitudinally subdividing sewer pipes

#307
20110017450
2011-01-27

METHOD FOR MAKING GRAVEL FILTERS IN OIL WELLS

#308
20110005755
2011-01-13

Downhole casing cutting tool

#309
20110000676
2011-01-06

Plug construction comprising a hydraulic crushing body

#310
20100326731
2010-12-30

STABILIZING DOWNHOLE TOOL

#311
20100307836
2010-12-09

Downhole assembly and cutter assembly

#312
20100252273
2010-10-07

Convertible downhole devices

#313
20100206581
2010-08-19

Shearing tool and methods of use

#314
20100155067
2010-06-24

Systems and methods for using a passageway through subterranean strata

#315
20100147520
2010-06-17

Method of removing a device in an annulus

#316
20100084024
2010-04-08

Method of direct hot tapping into a multiple production string without removing outer layers of casing

#317
20100044106
2010-02-25

Method and apparatus for delivering high power laser energy over long distances

#318
20100044105
2010-02-25

Methods and apparatus for delivering high power laser energy to a surface

#319
20100044104
2010-02-25

Apparatus for advancing a wellbore using high power laser energy

#320
20100044103
2010-02-25

Method and system for advancement of a borehole using a high power laser

#321
20100044102
2010-02-25

Methods and apparatus for removal and control of material in laser drilling of a borehole

#322
20100032151
2010-02-11

Convertible downhole devices and method of performing downhole operations using convertible downhole devices

#323
20090283330
2009-11-19

Downhole material retention apparatus

#324
20090277637
2009-11-12

Oil well plug and abandonment method

#325
20090266552
2009-10-29

Apparatus and method for removing subsea structures

#326
20090223680
2009-09-10

Methods for expanding tubular strings and isolating subterranean zones

#327
20090205835
2009-08-20

Cut release sub and method

#328
20090166035
2009-07-02

Borehole imaging and orientation of downhole tools

#329
20090107670
2009-04-30

Downhole seal bore repair device

#330
20090065213
2009-03-12

Downhole valve assembly and actuation device for a downhole valve assembly

#331
20090050334
2009-02-26

Conditioning ferrous alloys into cracking susceptible and fragmentable elements for use in a well

#332
20090020338
2009-01-22

Downhole assembly and cutter assembly

#333
20080230271
2008-09-25

Downhole abrading tools having fusible material and uses therefor

#334
20080202753
2008-08-28

Method and apparatus for expanding and separating tubulars in a wellbore

#335
20080178721
2008-07-31

Production casing ripper

#336
20080173453
2008-07-24

Mill and method for drilling composite bridge plugs

#337
20080156494
2008-07-03

Method and apparatus for cutting and removal of pipe from wells

#338
20080105431
2008-05-08

Method for adapting a tubular element in a subsiding wellbore

#339
20080035377
2008-02-14

Milling of cemented tubulars

#340
20080028619
2008-02-07

HEAVY DUTY MATERIAL PROCESSING SHEARS

#341
20080017387
2008-01-24

Methods for expanding tubular strings and isolating subterranean zones

#342
20080000687
2008-01-03

Downhole abrading tools having fusible material and methods of detecting tool wear

#343
20070131426
2007-06-14

Junk removal tool

#344
20070079995
2007-04-12

Cutting elements configured for casing component drillout and earth boring drill bits including same

#345
20070074868
2007-04-05

Wear resistant tubular connection

#346
20060196679
2006-09-07

Apparatus for radially expanding and plastically deforming a tubular member

#347
20060108125
2006-05-25

Anchor and method of using same

#348
20060090897
2006-05-04

High chrome/nickel milling with PDC cutters

#349
20060065408
2006-03-30

Methods for expanding tubular strings and isolating subterranean zones

#350
20060027368
2006-02-09

Method and apparatus for well perforating

#351
20060011344
2006-01-19

Coiled tubing conveyed milling

#352
20050252662
2005-11-17

Apparatus and method for expanding a tubular

#353
20050127673
2005-06-16

Tubing seal

#354
20050121232
2005-06-09

Downhole filter

#355
20050082063
2005-04-21

Methods and apparatus for severing nested strings of tubulars

#356
20050028982
2005-02-10

Disengagable burr mill

#357
20050011650
2005-01-20

Method and apparatus for expanding and separating tubulars in a wellbore

#358
20050011643
2005-01-20

Wear resistant tubular connection

#359
20050000697
2005-01-06

Formed tubulars

#360
20050000686
2005-01-06

Contractable and expandable tubular wellbore system

#361
17561405
2023-03-07

Downhole cutting tool positioning assemblies and methods to cut a tubular

#362
17405541
2022-12-06

Downhole ceramic disk rupture by jetting with fluids and solids

#363
16541709
2020-05-19

Method and apparatus for optimizing a well drilling operation

#364
16517218
2021-12-28

Cutting element for casing bit

#365
16400596
2020-09-29

Web protectors for use in a downhole tool

#366
16144322
2019-07-30

Methods and devices for restimulating a well completion

#367
14284232
2016-09-20

Abrasive perforator with fluid bypass

#368
14021473
2016-11-22

Water pump pipe cut-off tool

#369
13469937
2015-04-07

Downhole tool with fluted anvil