Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 34 - Valve arrangements for boreholes or wells
Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
11/2003
11/11/2003US6644412 Flow control apparatus for use in a wellbore
11/11/2003US6644411 Tubing hanger with flapper valve
11/11/2003US6644408 Equalizing flapper for down hole safety valves
11/11/2003US6644404 Method of progressively gravel packing a zone
11/11/2003US6644110 Measurements of properties and transmission of measurements in subterranean wells
11/06/2003US20030205389 Subsurface valve with system and method for sealing
11/06/2003US20030205372 Remote operated coil connector apparatus
11/06/2003US20030205083 Monitoring of downhole parameters and tools utilizing fiber optics
11/05/2003EP1359289A1 Downhole safety valve
11/05/2003CN2584818Y Sand washing, oil receiving, sealing device for oil well
11/05/2003CN2584817Y Sanding in well bleeder
11/05/2003CN2584816Y Oil pipe bleeder
11/05/2003CN2584815Y Valve device for raising productiveness of oil-well pump
11/04/2003US6640897 Method and apparatus for through tubing gravel packing, cleaning and lifting
10/2003
10/30/2003WO2003089755A1 Circulating sub
10/29/2003EP1357403A2 A method of generating electric power in a wellbore
10/29/2003EP1357402A2 A light actuated system for use in a wellbore
10/29/2003EP1357401A2 A system for controlling a downhole device in a wellbore
10/29/2003CN2583356Y Layering high pressure adjustable waterflooding valve for oil field
10/29/2003CN2583355Y Constant pressure bleed value for oil well
10/28/2003US6637514 Recovery of production fluids from an oil or gas well
10/28/2003US6637510 Wellbore mechanism for liquid and gas discharge
10/23/2003US20030196708 Multiport gate valve assembly for flow completion system
10/22/2003EP1355170A2 A method of controlling production from a wellbore
10/22/2003EP1355169A2 Method and apparatus for controlling chemical injection of a surface treatment system
10/22/2003EP1355168A2 A method for avoiding injection induced unintentional fracture growth
10/22/2003EP1355167A2 An injection well with a fibre optic cable to measure fluorescence of bacteria present
10/22/2003EP1355166A2 An injection evaluation system
10/22/2003CN2581686Y Locking device with two rows of steel balls
10/22/2003CN1450245A Single-current valve for battom of water injection string and use method thereof
10/21/2003US6634429 Upper zone isolation tool for intelligent well completions
10/21/2003US6634428 Delayed opening ball seat
10/21/2003US6634424 Downhole control tool
10/16/2003WO2003033857A3 Flow control mechanism for a downhole tool
10/16/2003US20030193035 Rotating blowout preventer with independent cooling circuits and thrust bearing
10/16/2003US20030192703 Flapper lock open apparatus
10/16/2003US20030192702 Gas-lock re-prime device for submersible pumps
10/16/2003US20030192701 Dump valve assembly for selective draining of liquid from an oil well pipe stream
10/16/2003US20030192694 Crossover tool
10/16/2003US20030192687 Downhole actuation system utilizing electroactive fluids
10/15/2003CN2580104Y Oil draining device of submersible electric pump
10/15/2003CA2425335A1 Flapper lock open apparatus
10/14/2003US6633236 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
10/14/2003US6633164 Measuring focused through-casing resistivity using induction chokes and also using well casing as the formation contact electrodes
10/14/2003US6631767 Method and apparatus for selective injection or flow control with through-tubing operation capacity
10/14/2003US6631764 Filter cake cleanup and gravel pack methods for oil based or water based drilling fluids
10/09/2003WO2003083333A2 Valve system and method
10/09/2003WO2003083256A1 Multi-position sliding sleeve valve
10/09/2003US20030188866 Circulation tool for use in gravel packing of wellbores
10/08/2003EP1350008A1 A sleeve valve for controlling fluid flow between a hydrocarbon reservoir and tubing in a well and method for the assembly of a sleeve valve
10/08/2003EP1350007A1 Device for an opening in an outer sleeve of a sleeve valve and a method for the assembly of a sleeve valve
10/08/2003EP1099001B1 Use of a cemented carbide for oil and gas applications
10/08/2003CN2578519Y Assembled wax remover
10/08/2003CN2578516Y Pump plug valves
10/07/2003US6629564 Downhole flow meter
10/02/2003US20030183398 Valve system and method
10/02/2003US20030183392 Multi-positioned sliding sleeve valve
09/2003
09/30/2003US6626244 Deep-set subsurface safety valve assembly
09/30/2003US6626239 Internal gate valve for flow completion systems
09/25/2003US20030180094 Aquifer recharge valve and method
09/25/2003US20030178205 Hydraulic power source for downhole instruments and actuators
09/25/2003US20030178202 Flow completion system
09/25/2003US20030178199 Valve closing device
09/25/2003US20030177848 Method and device for measuring a path that has been covered
09/24/2003EP1346128A1 Adjustable stabiliser for directional drilling
09/24/2003CN2575292Y Multi-wall T shape bottom mounted self-balance electromechanical integral intelligent oil pumping unit
09/23/2003US6622794 Sand screen with active flow control and associated method of use
09/23/2003US6622791 Method and apparatus for increasing fluid recovery from a subterranean formation
09/23/2003CA2291052C Fail-safe closure system for remotely operable valve actuator
09/18/2003US20030173091 Interventionless bi-directional barrier
09/17/2003EP0974066A4 High impact communication and control system
09/17/2003CN2573663Y Underbalance borehole well shut-in device
09/16/2003US6619397 Unconsolidated zonal isolation and control
09/16/2003US6619388 Fail safe surface controlled subsurface safety valve for use in a well
09/12/2003WO2003004913B1 Small bore gate valve
09/11/2003US20030168223 Method and system for stepwisevarying fluid flow in well
09/11/2003US20030168220 Inflatable flow control device and method
09/11/2003US20030168219 Control system with failsafe feature in the event of tubing rupture
09/10/2003EP0839255B1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
09/10/2003CN2571996Y Downhole switch
09/10/2003CN2571995Y Under pump oil leakage device for petroleum sucking pipe type pump
09/10/2003CN2571994Y Packing valve
09/10/2003CN1441871A Sand screen with integrated sensors
09/10/2003CN1120931C Bidirectionally normal opened spherical uniflow valve able to discharge sand
09/09/2003CA2116873C Wellhead
09/04/2003WO2003072908A2 Low-flow groundwater sampling system
09/04/2003WO2003072906A1 Actuator for closing a safety valve and safety assembly
09/04/2003US20030166470 Valve and position control using magnetorheological fluids
09/04/2003US20030164240 Controllable gas-lift well and valve
09/03/2003CN1440484A Method and system for stepwise varying fluid flow in well
09/02/2003US6612547 Downhole flow control devices
09/02/2003US6612537 Cartridge gate valve
09/02/2003US6612368 Flow completion apparatus
09/02/2003CA2106136C Oilfield valve
08/2003
08/28/2003WO2003071093A1 Ball dropping assembly
08/28/2003US20030159832 Infinitely variable control valve apparatus and method
08/28/2003US20030159831 Reciprocating pump vent-dump valve and methods of use
08/28/2003US20030159830 Reciprocating pump dump valve and methods of use
08/28/2003US20030159829 Downhole tool actuator
08/27/2003EP1068425B1 Drillstring with stabilisers for re-entering a primary wellbore
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