ClassID:

135307

E21B17/06 - 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:
#1
20260146505
2026-05-28

Rapid Separation Conduit

#2
20260139553
2026-05-21

ELECTRO-MECHANICAL DISCONNECT MECHANISM

#3
20260110222
2026-04-23

TRAVEL JOINT WITH A DUAL ENCAPSULATED COIL STROKE SYSTEM AND METHOD FOR USING THE SAME

#4
20260092505
2026-04-02

SYSTEM AND METHOD FOR GEOTHERMAL WELL INSTALLATION

#5
20260028884
2026-01-29

LUG LATCHING SYSTEM FOR COUPLING A LUBRICATOR TO A WELLHEAD

#6
20250334011
2025-10-30

RELEASE TOOL

#7
20250257615
2025-08-14

RETAINING RING, METHOD, AND SYSTEM

#8
20250154833
2025-05-15

DOWNHOLE HYDRAULIC MECHANICAL LOCK

#9
20250154831
2025-05-15

DOWNHOLE TOOL, METHOD, AND SYSTEM

#10
20250129675
2025-04-24

WIRELINE HEAD WITH MECHANICAL CABLE RELEASE

#11
20250122773
2025-04-17

ONE TRIP CEMENT PLUGGING AND MILLING/DRILLING SIDETRACK ASSEMBLY, METHOD, AND WELLBORE SYSTEM

#12
20250084710
2025-03-13

COMPLETION STRING, METHOD, AND SYSTEM

#13
20250075566
2025-03-06

Movement joint for tubing string

#14
20250067151
2025-02-27

LATERAL LOCATING ASSEMBLY HAVING ONE OR MORE PRODUCTION PORTS

#15
20250067129
2025-02-27

SYSTEM, METHOD AND APPARATUS FOR HYDRAULIC DOWNHOLE STICK-SLIP MITIGATION

#16
20250034953
2025-01-30

THREADED CONNECTION FOR EXPLORATION AND PRODUCTION OF A HYDROCARBON WELL

#17
20240401420
2024-12-05

Swivel Sub With Biasing Member

#18
20240401419
2024-12-05

Method and apparatus for retrieving tubing using disconnectable sub in a wellbore

#19
20240401418
2024-12-05

Bi-Directional Swivel Sub With Lugs

#20
20240352824
2024-10-24

System and methods for a quick release collar in cementing casing strings

#21
20240229597
2024-07-11

INNER STRING CEMENTING SYSTEM AND METHOD

#22
20240229568
2024-07-11

System and apparatus for release and rotation of rod lift string

#23
20240209703
2024-06-27

Control line activated tubing disconnect latch system

#24
20240191585
2024-06-13

Latch assembly

#25
20240133264
2024-04-25

INNER STRING CEMENTING SYSTEM AND METHOD

#26
20240125201
2024-04-18

EMERGENCY DISCONNECT ISOLATION VALVE

#27
20240117692
2024-04-11

Downhole tubing disconnect tool

#28
20240102346
2024-03-28

Systems and methods for providing buoyancy to a tubular string positioned in a wellbore

#29
20240068303
2024-02-29

TUBE WIRE ANCHOR AND METHOD OF OPERATING THE SAME

#30
20240068301
2024-02-29

Interventionless methods and systems for testing a liner top

#31
20240052715
2024-02-15

Asymmetric release device, method, and system

#32
20240052712
2024-02-15

DOWNHOLE APPARATUS

#33
20240035347
2024-02-01

RELEASE TOOL

#34
20230313621
2023-10-05

Multifunctional drilling enhancement tool and method

#35
20230304369
2023-09-28

Method and system for multilateral quick access in oil and gas industry

#36
20230265724
2023-08-24

Threaded connection for exploration and production of a hydrocarbon well

#37
20230235629
2023-07-27

System, method and apparatus for hydraulic downhole stick-slip mitigation

#38
20230228172
2023-07-20

Method for positioning a multilateral junction without the need for a deflector assembly

#39
20230228171
2023-07-20

Lateral locating assembly having one or more production ports

#40
20230228170
2023-07-20

WHIPSTOCK WITH DETACHABLE WHIPFACE AND SEALING CAPABILITIES FOR MULTILATERAL SYSTEMS

#41
20230220734
2023-07-13

Tube wire anchor and method of operating the same

#42
20230160274
2023-05-25

Single acting snap ring guide

#43
20230098383
2023-03-30

Force dissipation assembly for use with disconnect tools

#44
20230043285
2023-02-09

Emergency disconnect isolation valve

#45
20230008617
2023-01-12

VENTURI ACTIVATED DOWNHOLE TORQUE LIMITER

#46
20230003093
2023-01-05

Control line activated tubing disconnect latch system

#47
20220389796
2022-12-08

Downhole cutting tool

#48
20220389773
2022-12-08

Connecting tubulars in a wellbore

#49
20220381097
2022-12-01

Downhole torque limiter

#50
20220381094
2022-12-01

Shear coupling and method of assembling same

#51
20220372825
2022-11-24

Well abandonment tool

#52
20220364421
2022-11-17

Pull-away shearing mechanism

#53
20220341271
2022-10-27

Electro-mechanical release tool and associated methods

#54
20220282581
2022-09-08

Systems and methods for providing buoyancy to a tubular string positioned in a wellbore

#55
20220282579
2022-09-08

Shear coupling for sucker rod string

#56
20220275689
2022-09-01

Dual clutch system for travel joint

#57
20220268130
2022-08-25

Fully shrouded nozzle removed by shear

#58
20220259949
2022-08-18

Lateral locating assembly for lateral intervention

#59
20220259939
2022-08-18

Drill assembly having a stinger with downward oriented cups

#60
20220235616
2022-07-28

Operating tool for an artificial lift system

#61
20220178217
2022-06-09

Releasing tubulars in wellbores using downhole release tools

#62
20220170329
2022-06-02

Disconnecting a stuck drill pipe

#63
20220136336
2022-05-05

Dissolvable downhole connect tool

#64
20220010629
2022-01-13

System and method for anti-rotation between tubulars

#65
20210404266
2021-12-30

System and method for controlling a downhole operation using a clutch tool

#66
20210388681
2021-12-16

Multi-flow compaction/expansion joint

#67
20210363861
2021-11-25

Rotating hanger running tool

#68
20210355777
2021-11-18

Single acting snap ring guide

#69
20210332655
2021-10-28

Fluid-free hydraulic connector

#70
20210301857
2021-09-30

Shear coupling and method of assembling same

#71
20210254412
2021-08-19

Workflow process for connecting multiple coiled tubing strings

#72
20210189818
2021-06-24

Downhole disconnect tool

#73
20210164298
2021-06-03

Shearable riser system and method

#74
20210131195
2021-05-06

Releasable ratchet latch connector

#75
20210010333
2021-01-14

Concentric disconnect tool with multiple electrical conductors

#76
20200408074
2020-12-31

Perforating device for horizontal wells

#77
20200408049
2020-12-31

Pumpdown apparatus and method

#78
20200355033
2020-11-12

Releasable connection mechanism for use within a well

#79
20200340307
2020-10-29

Releasable connection mechanism for use within a well

#80
20200340306
2020-10-29

Connection assembly

#81
20200291734
2020-09-17

Downhole disconnect tool

#82
20200248536
2020-08-06

Electronic releasing mechanism

#83
20200240228
2020-07-30

Systems and methods for stuck drill string mitigation

#84
20200240223
2020-07-30

Methods and systems for disconnecting casing

#85
20200224504
2020-07-16

Downhole Release Mechanism

#86
20200217148
2020-07-09

Downhole tool for connecting with a conveyance line

#87
20200217147
2020-07-09

Downhole tool for connecting with a conveyance line

#88
20200157905
2020-05-21

Downhole release apparatus

#89
20200131885
2020-04-30

Emergency disconnect isolation valve

#90
20200048969
2020-02-13

Tubular Locking Ring

#91
20190383107
2019-12-19

Hydraulically actuated safety sub

#92
20190368295
2019-12-05

Systems and methods for stuck drill string mitigation

#93
20190338612
2019-11-07

Electronic release tool

#94
20190271197
2019-09-05

Mechanical-hydraulic integrated releasing device

#95
20190264521
2019-08-29

Inner barrel shear zone for a coring tool

#96
20190203543
2019-07-04

Systems and methods for releasing a portion of a drill string from a drilled cable

#97
20190203542
2019-07-04

Connector apparatus

#98
20190153788
2019-05-23

Releasable connection mechanism for use within a well

#99
20190145174
2019-05-16

Drilling system including a driveshaft/housing lock

#100
20190119992
2019-04-25

RELEASE ASSEMBLY FOR PERCUSSION DRILL TOOLS

#101
20190119991
2019-04-25

Actuating force control for downhole tools

#102
20190085674
2019-03-21

Fracturing assembly with clean out tubular string

#103
20190040701
2019-02-07

Inner barrel crimping connection for a coring tool

#104
20190010768
2019-01-10

Shear coupling

#105
20180347289
2018-12-06

Downhole expandable tubular members with sealed releasable connection

#106
20180328133
2018-11-15

Downhole disconnect tool

#107
20180320480
2018-11-08

Hydraulically assisted shear bolt

#108
20180298723
2018-10-18

Emergency disconnect isolation valve

#109
20180274331
2018-09-27

Remotely operated and multi-functional down-hole control tools

#110
20180258724
2018-09-13

Downhole impact apparatus

#111
20180252269
2018-09-06

Combined multi-coupler with rotating fixations for top drive

#112
20180252073
2018-09-06

Remotely operated and multi-functional down-hole control tools

#113
20180252053
2018-09-06

MONO-BORE WELLBORE COMPLETION WITH A RETRIEVABLE PORTION

#114
20180245406
2018-08-30

Shearable riser system and method

#115
20180163486
2018-06-14

HIGH-LOAD COLLET SHIFTING TOOL

#116
20180135358
2018-05-17

Selective seal stem anchor

#117
20180112471
2018-04-26

Casing drilling apparatus and system

#118
20180058154
2018-03-01

Releasable connection for a downhole tool string

#119
20180045005
2018-02-15

Hydraulic disconnect tool

#120
20180038169
2018-02-08

Releasable locking mechanism

#121
20180030789
2018-02-01

Connecting assembly and receptacle adapted to receive said connecting assembly for connecting two tubing sections, and method for installing and connecting two tubing sections in a wellbore

#122
20180016862
2018-01-18

Annulus isolation in drilling/milling operations

#123
20170370179
2017-12-28

Downhole drilling system

#124
20170356252
2017-12-14

Sucker rod shear couplers

#125
20170314714
2017-11-02

Clamp

#126
20170314339
2017-11-02

Drill string element and detachable driving element

#127
20170314338
2017-11-02

Retrievable re-connecting device with internal seal and slips for connecting to the top of an existing tubing in a well bore

#128
20170292335
2017-10-12

Device for clamping an element, carriage for a ground drilling device, ground drilling device, method for clamping an element and method for the manufacture of a device for clamping an element

#129
20170241214
2017-08-24

TOOL RELEASE DEVICE

#130
20170234094
2017-08-17

Hydraulic Jar Firing Isolation Device

#131
20170234081
2017-08-17

Releasable locking mechanism for locking a housing to a drilling shaft of a rotary drilling system

#132
20170226814
2017-08-10

Flexible smart release tool

#133
20170204683
2017-07-20

Low break out safety joint and method for releasably connecting a tubing expansion assembly to a drill string

#134
20170198532
2017-07-13

Hydraulic-mechanical pipe connector for tool connection and pipe splicing

#135
20170167204
2017-06-15

Systems and methods for releasing a portion of a drill string from a drilling cable

#136
20170130554
2017-05-11

Single-run well abandoning method and apparatus

#137
20170081932
2017-03-23

Unlocking and unblocking tool for disconnect assembly for cylindrical members

#138
20170081929
2017-03-23

Rotary impact tool

#139
20170067298
2017-03-09

Bottom hole assembly retrieval for casing-while-drilling operations using a tethered float valve

#140
20170051562
2017-02-23

Resettable downhole torque limiter and related methods of use

#141
20170044844
2017-02-16

Disconnect and other devices for downhole assembly

#142
20170016304
2017-01-19

Well barrier method and apparatus

#143
20170009534
2017-01-12

Torque limiting device

#144
20160356110
2016-12-08

Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification

#145
20160305196
2016-10-20

Opposing thread screw safety joint

#146
20160281442
2016-09-29

Adjustable shear assembly

#147
20160273290
2016-09-22

Downhole latch assembly

#148
20160245024
2016-08-25

Tool connection release system

#149
20160160577
2016-06-09

SUCKER ROD

#150
20160153248
2016-06-02

Travel joint release devices and methods

#151
20160145949
2016-05-26

Safety joint designed with anti-lock pressure compensation seal

#152
20160138346
2016-05-19

System For Pumping Liquid Media From A Bore And Method For Installing A Pump Unit Designed As A Progressive Cavity Pump In A Bore

#153
20160123093
2016-05-05

Travel joint release devices and methods

#154
20160123092
2016-05-05

Safety joint

#155
20160090793
2016-03-31

Releasably lockable, retrievable, mule shoe assembly

#156
20160069145
2016-03-10

Utilizing dissolvable metal for activating expansion and contraction joints

#157
20160053586
2016-02-25

Manufacturing method and apparatus for a collet assembly with congruent corners

#158
20160024858
2016-01-28

Tool for selectively connecting or disconnecting components of a downhole workstring

#159
20150376958
2015-12-31

Pressure responsive downhole tool having an adjustable shear thread retaining mechanism and related methods

#160
20150376957
2015-12-31

Systems and methods for releasing a tool string

#161
20150361730
2015-12-17

Compression set downhole clutch

#162
20150354289
2015-12-10

Cylinder release arrangement

#163
20150345231
2015-12-03

Systems and methods for releasing a tool string

#164
20150330170
2015-11-19

Hydro-mechanical downhole tool

#165
20150315849
2015-11-05

Load cross-over slip-joint mechanism and method of use

#166
20150285010
2015-10-08

Weak link for a riser system

#167
20150259996
2015-09-17

On-demand release tool system and methodology

#168
20150252627
2015-09-10

SAFETY JOINT FOR A TOOL STRING

#169
20150247368
2015-09-03

Releasing a downhole tool

#170
20150226018
2015-08-13

Downhole separation apparatus and method

#171
20150211318
2015-07-30

Signal operated drilling tools for milling, drilling, and/or fishing operations

#172
20150197995
2015-07-16

Retrievable tubing connector system

#173
20150197994
2015-07-16

Releasable connection for coiled tubing drilling apparatus

#174
20150184461
2015-07-02

Subsea drilling with casing

#175
20150144358
2015-05-28

Downhole release tool

#176
20150130185
2015-05-14

Vibration-resistant boltless ESP component connection

#177
20150129204
2015-05-14

Downhole disconnect device and method of operation

#178
20150101790
2015-04-16

Time delayed secondary retention mechanism for safety joint in a wellbore

#179
20150060078
2015-03-05

Subsea drilling with casing

#180
20150042487
2015-02-12

Latching assembly for wellbore logging tools and method of use

#181
20150041141
2015-02-12

Mechanically actuated device positioned below mechanically actuated release assembly utilizing J-slot device

#182
20150030374
2015-01-29

Isolated shearing mechanism for downhole tools

#183
20140352975
2014-12-04

System and methods for recovering hydrocarbons

#184
20140332234
2014-11-13

Setting tool

#185
20140290965
2014-10-02

Deactivation of packer with safety joint

#186
20140262273
2014-09-18

Break-away support ring for wellbore apparatus

#187
20140251631
2014-09-11

Riser breakaway connection and intervention coupling device

#188
20140202710
2014-07-24

Method and apparatus for pressure-actuated tool connection and disconnection

#189
20140190707
2014-07-10

Reinforced shear components and methods of using same

#190
20140190703
2014-07-10

LANDING STRING

#191
20140166370
2014-06-19

Downhole torque limiting assembly for drill string

#192
20140124220
2014-05-08

Mechanically actuated device positioned below mechanically actuated release assembly utilizing J-slot device

#193
20140110130
2014-04-24

Anchor Latch on Off For Sucker Rods

#194
20140110129
2014-04-24

HYDRAULIC DISCONNECT

#195
20140060856
2014-03-06

Resettable downhole torque limiter and related methods of use

#196
20140034332
2014-02-06

Workstring Disconnect Tool and Method of Use

#197
20140014364
2014-01-16

Mechanically activated contingency release system and method

#198
20140000873
2014-01-02

Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification

#199
20130341043
2013-12-26

Locking safety joint for use in a subterranean well

#200
20130327546
2013-12-12

Tubing string with latch system

#201
20130319655
2013-12-05

Downhole safety joint

#202
20130309016
2013-11-21

Quick disconnect system

#203
20130269928
2013-10-17

Downhole tool for use in a drill string

#204
20130264071
2013-10-10

Pressure activated contingency release system and method

#205
20130255964
2013-10-03

Friction reduction mechanism for a downhole release assembly

#206
20130233573
2013-09-12

Deactivation of packer with safety joint

#207
20130233567
2013-09-12

Locking safety joint for use in a subterranean well

#208
20130233566
2013-09-12

Safety joint with non-rotational actuation

#209
20130213640
2013-08-22

Wireless drill string disconnect

#210
20130186646
2013-07-25

TREATMENT PLUG SETTING TOOL, SETTING SYSTEM AND METHOD OF AVOIDING SETTING A TREATMENT PLUG WHILE RUNNING

#211
20130153207
2013-06-20

Subterranean tool with multiple release capabilities

#212
20130153203
2013-06-20

Subterranean tool with shock absorbing shear release

#213
20130140029
2013-06-06

Torque limiting device

#214
20130140019
2013-06-06

Releasably lockable, retrievable, mule shoe assembly

#215
20130133895
2013-05-30

Mechanical bending weak link

#216
20130112434
2013-05-09

Apparatus and method of forming a plug in a wellbore

#217
20130093179
2013-04-18

Electronic combined load weak link

#218
20130087345
2013-04-11

Re-latch mechanism for wellbore liner system

#219
20130087324
2013-04-11

Re-latch mechanism for wellbore liner system

#220
20130037269
2013-02-14

Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly

#221
20130032351
2013-02-07

RELEASABLE CONNECTIONS FOR SUBSEA FLEXIBLE JOINTS AND SERVICE LINES

#222
20130032326
2013-02-07

Isolated shearing mechanism for downhole tools

#223
20120305319
2012-12-06

SAFETY JOINT WITH INDICATING FEATURE

#224
20120285703
2012-11-15

Hydro-mechanical downhole tool

#225
20120273272
2012-11-01

LOCKABLE CORE BARREL HEAD FOR DRILLING SYSTEM AND SURVEY INSTRUMENT ASSEMBLY PROVIDED WITH A CONNECTION LINK FOR ARRANGEMENT IN A DRILLING SYSTEM

#226
20120199351
2012-08-09

Method for removing a consumable downhole tool

#227
20120199340
2012-08-09

Consumable downhole tool

#228
20120193105
2012-08-02

Disconnect devices for downhole strings

#229
20120186826
2012-07-26

Intermediate disconnection tool to be placed in a shuttle lowered into a well for exploiting a fluid, and related shuttle and method

#230
20120168178
2012-07-05

Well tool with shearable collet

#231
20120152565
2012-06-21

Downhole release joint with radially expandable member

#232
20120152521
2012-06-21

Disconnect assembly for cylindrical members

#233
20120145403
2012-06-14

Intelligent pressure actuated release tool

#234
20120145396
2012-06-14

Releasing and recovering tool

#235
20120132433
2012-05-31

Safety joint and riser

#236
20120090849
2012-04-19

Hydraulic disconnect

#237
20120067589
2012-03-22

Riser emergency disconnect control system

#238
20120048572
2012-03-01

Method for removing a consumable downhole tool

#239
20120018142
2012-01-26

Coil tubing cable head with tool release, fluid circulation and cable protection features

#240
20110308809
2011-12-22

Auxiliary subsurface compensator

#241
20110308784
2011-12-22

Disconnect device for downhole assembly

#242
20110303407
2011-12-15

Consumable downhole tools

#243
20110284237
2011-11-24

Drilling riser release method

#244
20110259601
2011-10-27

DOWNHOLE RELEASABLE CONNECTOR

#245
20110240313
2011-10-06

Resettable downhole torque limiter and related methods of use

#246
20110226482
2011-09-22

Apparatus and method for separating a tubular string from a subsea well installation

#247
20110209867
2011-09-01

Mechanical lock with pressure balanced floating piston

#248
20110192612
2011-08-11

Controller for a Downhole Tool

#249
20110163560
2011-07-07

Downhole tool releasing mechanism

#250
20110150596
2011-06-23

Shear coupling assembly for use with rotary and reciprocating pumps

#251
20110146990
2011-06-23

BACKOFF SUB AND METHOD FOR REMOTELY BACKING OFF A TARGET JOINT

#252
20110146988
2011-06-23

Apparatus and method for separating a downhole tubular string into two parts

#253
20110127041
2011-06-02

Riser weak link

#254
20110094753
2011-04-28

Downhole release joint with radially expandable members

#255
20110094748
2011-04-28

Pull-head release mechanism for bend stiffener connector

#256
20110088903
2011-04-21

Instrumented disconnecting tubular joint

#257
20110067854
2011-03-24

Downhole sequentially-firing casing perforating gun with electronically-actuated wireline release mechanism, and actuation circuit therefor

#258
20110036594
2011-02-17

Liner hanger running tool and method

#259
20110024133
2011-02-03

Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly

#260
20100319930
2010-12-23

Time-controlled release device for wireline conveyed tools

#261
20100282474
2010-11-11

Subsea overload release system and method

#262
20100181077
2010-07-22

Weakpoint coupling of selectively adjustable load bearing capacity

#263
20100175870
2010-07-15

Downhole disconnect mechanism

#264
20100164223
2010-07-01

Marine drilling riser connector with removable shear elements

#265
20100126776
2010-05-27

Subsea drilling with casing

#266
20100116499
2010-05-13

Internal release connector and method

#267
20100116487
2010-05-13

Internal release connector and method

#268
20100108328
2010-05-06

Method for Removing a Consumable Downhole Tool

#269
20100101781
2010-04-29

Coupling For Downhole Tools

#270
20100096849
2010-04-22

Internal release connector and method

#271
20100089566
2010-04-15

Consumable downhole tools

#272
20100084141
2010-04-08

Disconnect apparatus and method

#273
20100078178
2010-04-01

Smooth bore latch for tie back receptacle extension

#274
20100065283
2010-03-18

Release device

#275
20090301711
2009-12-10

Mechanically engaged and releasable connection system

#276
20090283322
2009-11-19

Drilling string back off sub apparatus and method for making and using same

#277
20090271966
2009-11-05

SHEAR COUPLING ASSEMBLY WITH BACKOFF PREVENTION

#278
20090266544
2009-10-29

Signal operated tools for milling, drilling, and/or fishing operations

#279
20090260822
2009-10-22

Backoff sub and method for remotely backing off a target joint

#280
20090078429
2009-03-26

SYSTEM AND METHOD FOR ENGAGING WELL EQUIPMENT IN A WELLBORE

#281
20090057015
2009-03-05

Apparatus and methods for drilling wellbores that utilize a detachable reamer

#282
20090056947
2009-03-05

System and method for engaging completions in a wellbore

#283
20090025940
2009-01-29

Latch assembly for wellbore operations

#284
20090014172
2009-01-15

Apparatus and methods for drilling and lining a wellbore

#285
20080277880
2008-11-13

Connector Assembly

#286
20080236840
2008-10-02

Thermal actuator

#287
20080105435
2008-05-08

Safety joint

#288
20080099210
2008-05-01

Disconnect apparatus and method

#289
20080066901
2008-03-20

BOX END SUCKER ROD SHEAR COUPLING

#290
20080060817
2008-03-13

Production tubing hydraulic release mechanism and method of use

#291
20080041597
2008-02-21

Releasing and recovering tool

#292
20080041587
2008-02-21

Method for logging after drilling

#293
20070284114
2007-12-13

METHOD FOR REMOVING A CONSUMABLE DOWNHOLE TOOL

#294
20070284097
2007-12-13

CONSUMABLE DOWNHOLE TOOLS

#295
20070261889
2007-11-15

Downhold disconnect safety joint

#296
20070261859
2007-11-15

Downhole connector

#297
20070209803
2007-09-13

Method for utilizing downhole safety joint

#298
20070074874
2007-04-05

Quill saver sub

#299
20070074624
2007-04-05

Explosive pipe severing tool

#300
20070034372
2007-02-15

Internal release connector and method