| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 04/03/1984 | CA1164854A1 Well drilling method |
| 04/03/1984 | CA1164795A1 Well tool |
| 04/03/1984 | CA1164794A1 Pressure balanced ball valve device |
| 04/03/1984 | CA1164790A1 Method and apparatus for completing a well |
| 03/13/1984 | US4436157 Latch mechanism for subsea test tree |
| 03/13/1984 | US4436155 Well cleanup and completion apparatus |
| 03/13/1984 | US4436152 Shifting tool |
| 03/13/1984 | US4436149 Hydraulic setting tool |
| 03/06/1984 | US4434854 Pressure actuated vent assembly for slanted wellbores |
| 03/06/1984 | US4434853 Oil well blow out control valve |
| 03/06/1984 | US4434847 Flow controlling apparatus |
| 03/06/1984 | CA1163187A1 Safety valve |
| 02/29/1984 | EP0101497A1 System for activating a blowout preventer |
| 02/28/1984 | US4433847 Conduit sealing system |
| 02/28/1984 | CA1162844A1 Locking mandrel |
| 02/28/1984 | CA1162843A1 Bar actuated vent assembly and perforating gun |
| 02/21/1984 | US4432418 Apparatus for releasably bridging a well |
| 02/21/1984 | US4432417 For use in a subterranean well |
| 02/21/1984 | US4432416 Well flow control apparatus |
| 02/14/1984 | US4431053 For fishing operations |
| 02/14/1984 | US4431051 Surface controlled subsurface safety valve |
| 02/14/1984 | CA1162145A1 Balanced area safety valve |
| 02/14/1984 | CA1162144A1 Well safety valve |
| 02/07/1984 | US4429748 For use in a well testing string |
| 02/07/1984 | US4429747 Well tool |
| 02/07/1984 | US4429620 Hydraulically operated actuator |
| 02/07/1984 | CA1161748A1 Ball switch device and method |
| 01/31/1984 | US4428557 Single line deep depth safety valve |
| 01/31/1984 | US4428428 Tool and method for gravel packing a well |
| 01/24/1984 | US4427175 Valve |
| 01/24/1984 | US4427071 Flapper type safety valve for subterranean wells |
| 01/24/1984 | US4427070 Circulating and pressure equalizing sub |
| 01/17/1984 | US4425965 Safety system for submersible pump |
| 01/10/1984 | US4424862 Injection devices |
| 01/10/1984 | US4424860 Deflate-equalizing valve apparatus for inflatable packer formation tester |
| 01/03/1984 | US4423782 Annulus safety apparatus |
| 01/03/1984 | US4423773 Single acting subterranean well valve assembly with conduit fluid stripping means |
| 12/27/1983 | US4422618 Remotely operated valve |
| 12/27/1983 | US4422506 Low pressure responsive APR tester valve |
| 12/27/1983 | US4422503 Control line blow out preventer |
| 12/27/1983 | CA1159364A1 Pressure operated test tool |
| 12/27/1983 | CA1159363A1 Well system and method |
| 12/27/1983 | CA1159360A1 Multiple stage cementer and casing inflation packer |
| 12/20/1983 | US4421323 Oil well string member with static seal |
| 12/20/1983 | US4421174 Cyclic annulus pressure controlled oil well flow valve and method |
| 12/20/1983 | US4421172 Drill pipe tester and safety valve |
| 12/20/1983 | US4421171 Valve operable under oppositely directed pressure differentials |
| 12/20/1983 | US4421165 Multiple stage cementer and casing inflation packer |
| 12/20/1983 | CA1158975A1 Submergible pump installation |
| 12/13/1983 | US4420045 Drill pipe tester and safety valve |
| 12/13/1983 | US4420044 Flow control system |
| 12/13/1983 | US4420043 Valving apparatus for selectively sealing an annulus defined between a work string and the bore of an element of a production string of a subterranean well |
| 12/13/1983 | US4420041 Method of using a valve in gravel packing |
| 12/13/1983 | CA1158545A1 Chemical injection valve |
| 12/07/1983 | EP0095837A2 Well testing apparatus and method |
| 12/06/1983 | US4418750 Well tool |
| 11/29/1983 | US4417622 Well sampling method and apparatus |
| 11/29/1983 | US4417600 Safety valve |
| 11/29/1983 | CA1157768A1 Control valve system for blowout preventers |
| 11/15/1983 | US4415038 Formation protection valve apparatus and method |
| 11/15/1983 | US4415037 Ball valve loading apparatus |
| 11/15/1983 | US4415036 Pressure equalizing flapper type safety valve for subterranean wells |
| 11/15/1983 | US4415028 Apparatus for measuring bottom hole well conditions |
| 11/15/1983 | US4415027 Accumulator recharging valve |
| 11/15/1983 | US4415026 Roller guide for oil-well pump |
| 11/15/1983 | CA1156929A2 Valve |
| 11/15/1983 | CA1156928A2 Valve |
| 11/15/1983 | CA1156927A1 Flow controlling apparatus |
| 11/08/1983 | US4413642 Blowout preventer control system |
| 11/01/1983 | CA1156341A1 Apparatus for well logging while drilling |
| 11/01/1983 | CA1156139A1 Safety valve manifold system |
| 10/26/1983 | EP0092354A2 Circulation valve |
| 10/26/1983 | EP0092341A2 Recloseable auxiliary valve and a method of actuating it |
| 10/25/1983 | US4411316 Subterranean well valve with lock open mechanism |
| 10/25/1983 | CA1155761A1 Valve |
| 10/25/1983 | CA1155760A1 Lock open mechanism for subsurface safety valve |
| 10/25/1983 | CA1155759A1 Well tools |
| 10/18/1983 | US4410205 Blow out preventer hose coupling |
| 10/04/1983 | US4407377 Surface controlled blade stabilizer |
| 10/04/1983 | US4407363 Subsurface well apparatus |
| 10/04/1983 | US4407362 Flow control apparatus for wells |
| 10/04/1983 | US4407329 Magnetically operated fail-safe cutoff valve with pressure equalizing means |
| 10/04/1983 | US4407183 Method and apparatus for hydraulically controlling subsea equipment |
| 09/28/1983 | EP0089740A2 Annulus pressure responsive tester valve |
| 09/27/1983 | US4406335 Special circulation sub |
| 09/27/1983 | US4406328 Apparatus for locking a ball valve element in one position |
| 09/27/1983 | CA1154307A1 Roller guide for oil-well pump |
| 09/20/1983 | US4405014 Safety valve manifold system |
| 09/14/1983 | EP0088550A2 Tester valve with liquid spring |
| 09/14/1983 | EP0088531A2 Downhole tester valve |
| 09/13/1983 | US4403659 Pressure controlled reversing valve |
| 09/13/1983 | US4403657 Locking mandrel having dogs for latching to a landing nipple and lugs for latching to an operator reciprocal in the landing nipple |
| 09/13/1983 | US4403628 Inside blowout preventer |
| 08/30/1983 | US4401158 One trip multi-zone gravel packing apparatus |
| 08/23/1983 | US4399871 Chemical injection valve with openable bypass |
| 08/23/1983 | US4399870 Annulus operated test valve |
| 08/18/1983 | WO1983002798A1 System for activating a blowout preventer |
| 08/16/1983 | US4398555 Flow control valve |
| 08/09/1983 | CA1151535A1 Circulation valve |
| 08/09/1983 | CA1151533A1 Drill pipe tester and safety valve |