ClassID:

135168

E21B7/061 - page 2 - CPC Classification

Classification description:

Special methods or apparatus for drilling; Directional drilling; Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock

Recent Application in this class:
#301
20140262528
2014-09-18

Sidetracking system and related methods

#302
20140251615
2014-09-11

Window milling systems with expandable blades for securing a whipstock assembly and method of use

#303
20140246241
2014-09-04

String supported whipstock for multiple laterals in a single trip and related method

#304
20140238701
2014-08-28

Mill diverter having a swellable material for preventing fluid flow past the material

#305
20140216819
2014-08-07

SYSTEM AND METHOD FOR COUPLING A DRILL BIT TO A WHIPSTOCK

#306
20140216760
2014-08-07

Systems and methods for rotationally orienting a whipstock assembly

#307
20140216744
2014-08-07

Method of intersecting a first well bore by a second well bore

#308
20140182944
2014-07-03

Integrated sidetrack drilling tool

#309
20140144617
2014-05-29

System for circumferentially aligning a downhole latch subsystem

#310
20140131036
2014-05-15

Apparatus and method for milling/drilling windows and lateral wellbores without locking using unlocked fluid-motor

#311
20140116784
2014-05-01

Borehole selector assembly

#312
20140090894
2014-04-03

Diverter latch assembly system

#313
20140014343
2014-01-16

Systems and methods for managing milling debris

#314
20130341048
2013-12-26

Hydraulically triggered anchor

#315
20130319693
2013-12-05

Assembly and technique for completing a multilateral well

#316
20130319653
2013-12-05

Wedge deflecting device for sidetracking

#317
20130299160
2013-11-14

Wellbore anchoring system

#318
20130292110
2013-11-07

Downhole apparatus, device, assembly and method

#319
20130213716
2013-08-22

APPARATUS AND METHOD FOR LATERAL WELL DRILLING

#320
20130213654
2013-08-22

Cementing whipstock apparatus and methods

#321
20130168151
2013-07-04

System and method to facilitate the drilling of a deviated borehole

#322
20130146362
2013-06-13

Oil and gas enhancement system—radial drilling method

#323
20130112397
2013-05-09

Spiral whipstock for low-side casing exits

#324
20130062125
2013-03-14

Apparatus and Method for Lateral Well Drilling

#325
20130056278
2013-03-07

Apparatus and method for placement of downhole tools using a visual imaging device

#326
20130056277
2013-03-07

Method and Device for Producing an Opening from a Motherbore and into a Formation

#327
20130025864
2013-01-31

Whipstock assembly and method for low side exit

#328
20130020084
2013-01-24

AFFIXATION AND RELEASE ASSEMBLY FOR A MILL AND METHOD

#329
20130008664
2013-01-10

Above mudline whipstock for marine platform drilling operations

#330
20120305267
2012-12-06

Wellbore junction completion with fluid loss control

#331
20120261193
2012-10-18

System and method for coupling an impregnated drill bit to a whipstock

#332
20120255785
2012-10-11

System and method for coupling a drill bit to a whipstock

#333
20120241144
2012-09-27

Extended reach whipstock

#334
20120230151
2012-09-13

Borehole Imaging And Orientation Of Downhole Tools

#335
20120228032
2012-09-13

Expandable window milling bit and methods of milling a window in casing

#336
20120222902
2012-09-06

High performance wellbore departure and drilling system

#337
20120217068
2012-08-30

Lateral well drilling apparatus and method

#338
20120199344
2012-08-09

Method and apparatus for communicating with a device located in a borehole

#339
20120186875
2012-07-26

Hydraulic drilling method with penetration control

#340
20120160567
2012-06-28

Method and apparatus for drilling a zero-radius lateral

#341
20120160493
2012-06-28

Method and apparatus for milling a zero radius lateral window in casing

#342
20120152566
2012-06-21

Extended reach whipstock and methods of use

#343
20120138301
2012-06-07

Controllably installed multilateral completions assembly

#344
20120111636
2012-05-10

Combination whipstock and completion deflector

#345
20120103687
2012-05-03

Redundant position reference system for multilateral exit construction and method for use of same

#346
20120067646
2012-03-22

Apparatus and Method for Lateral Well Drilling

#347
20120043135
2012-02-23

Method of forming a bore

#348
20120031678
2012-02-09

Method of forming a bore

#349
20120000673
2012-01-05

Installation System with Force Generating Tool

#350
20110315371
2011-12-29

OPEN-HOLE ANCHOR WHIPSTOCK SYSTEM

#351
20110290561
2011-12-01

Downhole hydraulic jetting assembly, and method for stimulating a production wellbore

#352
20110290505
2011-12-01

Drilling and completion deflector and method of using

#353
20110277998
2011-11-17

Apparatus and method for setting a tool in a borehole

#354
20110259644
2011-10-27

CURVED STRUCTURAL PIPE SHOE

#355
20110253387
2011-10-20

Cementing whipstock apparatus and methods

#356
20110247881
2011-10-13

Intelligent controlled process for well lateral coring

#357
20110203851
2011-08-25

T-Frac System Run in System

#358
20110203847
2011-08-25

Downhole hydraulic jetting assembly, and method for stimulating a production wellbore

#359
20110198087
2011-08-18

Blasting lateral holes from existing well bores

#360
20110174477
2011-07-21

Full Gauge Milling Bottom Hole Assembly with Optimal Contact Force and Build Rate Capability

#361
20110155469
2011-06-30

Apparatus and Method for Positioning Extended Lateral Channel Well Stimulation Equipment

#362
20110155468
2011-06-30

Side-tracking system and related methods

#363
20110107830
2011-05-12

Apparatus and methods for characterizing a reservoir

#364
20110061865
2011-03-17

Directional setting tool and associated methods

#365
20110017445
2011-01-27

Method and device for making lateral openings out of a wellbore

#366
20100319997
2010-12-23

Whipstock attachment to a fixed cutter drilling or milling bit

#367
20100307736
2010-12-09

Permanent bypass whipstock assembly for drilling and completing a sidetrack well and preserving access to the original wellbore

#368
20100294512
2010-11-25

Methods and apparatuses for installing lateral wells

#369
20100276145
2010-11-04

Milling system and method of milling

#370
20100270080
2010-10-28

Apparatus and method for lateral well drilling

#371
20100224367
2010-09-09

Apparatus and method for milling casing in jet drilling applications for hydrocarbon production

#372
20100218996
2010-09-02

Directional sidetrack well drilling system

#373
20100212913
2010-08-26

Drilling and completion deflector

#374
20100187012
2010-07-29

Method and system for laterally drilling through a subterranean formation

#375
20100181113
2010-07-22

Horizontal waterjet drilling method

#376
20100155083
2010-06-24

Open-hole anchor for whipstock system

#377
20100147592
2010-06-17

Mill-through tailpipe liner exit and method of use thereof

#378
20100084140
2010-04-08

DOWNHOLE SEAL AND ANCHOR RELEASING SYSTEM AND METHOD

#379
20100044101
2010-02-25

Methods, systems, and apparatus for production of hydrocarbons from a subterranean formation

#380
20100012322
2010-01-21

Whipstock

#381
20090301706
2009-12-10

Non-metallic whipstock

#382
20090272547
2009-11-05

METHOD AND APPARATUS FOR A DOWNHOLE EXCAVATION IN A WELLBORE

#383
20090266559
2009-10-29

METHOD AND APPARATUS FOR INSTALLING DEFLECTING CONDUCTOR PIPE

#384
20090255732
2009-10-15

Method and apparatus for lateral well drilling with enhanced capability for clearing cuttings and other particles

#385
20090255676
2009-10-15

Method and apparatus for lateral well drilling with biased length adjusting casing cutter

#386
20090255664
2009-10-15

Combination whipstock and seal bore diverter system

#387
20090220303
2009-09-03

Underground sequestration system and method

#388
20090218143
2009-09-03

Apparatus and method for positioning extended lateral channel well stimulation equipment

#389
20090194292
2009-08-06

Inverted drainholes and the method for producing from inverted drainholes

#390
20090173544
2009-07-09

Method and apparatus for lateral well drilling utilizing an abrasive fluid stream discharged from a rotating nozzle

#391
20090166035
2009-07-02

Borehole imaging and orientation of downhole tools

#392
20090133877
2009-05-28

One trip milling system and method

#393
20090107678
2009-04-30

Chemically Enhanced Stimulation of oil/gas formations

#394
20090020335
2009-01-22

Methods, systems and apparatus for production of hydrocarbons from a subterranean formation

#395
20080314643
2008-12-25

Drilling system and methods of drilling lateral boreholes

#396
20080296029
2008-12-04

DEBRIS CONTROL ARRANGEMENT FOR A WHIPSTOCK AND METHOD

#397
20080257605
2008-10-23

Method and assembly for forming a supported bore using a first and second drill bit

#398
20080202754
2008-08-28

Casing window milling assembly

#399
20080185148
2008-08-07

Whipstock assembly for forming a window within a wellbore casing

#400
20080115940
2008-05-22

Apparatus, system, and method for casing hole formation in radial drilling operations

#401
20080110629
2008-05-15

Method and apparatus for laterally drilling through a subterranean formation

#402
20080105438
2008-05-08

Degradable whipstock apparatus and method of use

#403
20080073073
2008-03-27

Whipstock with curved ramp

#404
20080029276
2008-02-07

Downhole tool retrieval and setting system

#405
20080017378
2008-01-24

Diameter based tracking for window milling system

#406
20080000694
2008-01-03

Mechanical and fluid jet drilling method and apparatus

#407
20070240876
2007-10-18

Non-metallic whipstock

#408
20070187085
2007-08-16

ONE TRIP MILLING SYSTEM

#409
20070175629
2007-08-02

Downhole/openhole anchor

#410
20070151765
2007-07-05

Method and apparatus for horizontal drilling and oil recovery

#411
20070131433
2007-06-14

In-situ creation of drilling deflector

#412
20070125577
2007-06-07

Apparatus, system and method for installing boreholes from a main wellbore

#413
20070114037
2007-05-24

Wellbore system for simultaneous drilling and production

#414
20070044954
2007-03-01

Downhole motor locking assembly and method

#415
20070034409
2007-02-15

Method and apparatus for a downhole excavation in a wellbore

#416
20070034384
2007-02-15

Whipstock liner

#417
20070017707
2007-01-25

One-step directional coring or drilling system

#418
20070007000
2007-01-11

Expandable window milling bit and methods of milling a window in casing

#419
20060260816
2006-11-23

Apparatus and method for improving multilateral well formation and reentry

#420
20060249310
2006-11-09

Whipstock kick off radius

#421
20060207771
2006-09-21

Apparatus and methods of use for a whipstock anchor

#422
20060173626
2006-08-03

Method for locating casing joints using measurement while drilling tool

#423
20060169495
2006-08-03

Sleeved hose assembly and method for jet drilling of lateral wells

#424
20060157283
2006-07-20

Steerable drilling system

#425
20060137912
2006-06-29

Method and apparatus for horizontal drilling and oil recovery

#426
20060131026
2006-06-22

Adjustable window liner

#427
20060118298
2006-06-08

Wellstring assembly

#428
20060076137
2006-04-13

Perforation alignment tool for jet drilling, perforating and cleaning

#429
20060054354
2006-03-16

Downhole tool

#430
20060037759
2006-02-23

Expandable whipstock anchor assembly

#431
20060032672
2006-02-16

Lateral downhole drilling tool

#432
20060027359
2006-02-09

Whipstock assembly and method of manufacture

#433
20050217858
2005-10-06

Apparatus and method of drilling with casing

#434
20050194188
2005-09-08

Method of drilling and completing multiple wellbores inside a single caisson

#435
20050167158
2005-08-04

One-step directional coring or drilling system

#436
20050161222
2005-07-28

Apparatus and methods for forming a lateral wellbore

#437
20050155771
2005-07-21

Apparatus and methods for expanding tubulars in a wellbore

#438
20050150656
2005-07-14

Single mill casing window cutting tool and method

#439
20050145392
2005-07-07

Wellbore liner system

#440
20050145381
2005-07-07

Orientable whipstock tool and method

#441
20050103528
2005-05-19

Horizontal directional drilling in wells

#442
20050077048
2005-04-14

Downhole tubular splitter assembly and method

#443
20050072598
2005-04-07

Method and device for deviated coring and/or drilling

#444
20050067166
2005-03-31

Erectable arm assembly for use in boreholes

#445
20050029017
2005-02-10

Well string assembly

#446
18735748
2024-11-12

Directional drilling method for branching borehole with short radius and system

#447
18413509
2024-08-06

Directional drilling device and drilling method of aquifer remediation of coal seam roof

#448
18236102
2025-01-28

Rotatable sleeve for downhole tool

#449
15257215
2017-10-24

Real time untorquing and over-torquing of drill string connections

#450
14876777
2017-10-24

Motor rotary steerable system

#451
14676150
2016-03-15

Multilateral well system and method

#452
14510561
2015-08-18

Steering assembly for directional drilling of a wellbore