| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 01/14/2003 | US6505682 Controlling production |
| 01/09/2003 | WO2001055550A9 Crossover tree system |
| 01/08/2003 | EP1272733A1 Differential flow control valve |
| 01/08/2003 | EP1272727A2 Apparatus to actuate downhole tool |
| 01/08/2003 | CN2530028Y Valve preventing oil |
| 01/08/2003 | CN1390274A Wellbore system having non-return valve |
| 01/08/2003 | CN1389640A Oil pipe drain valve for beam pumping unit well |
| 01/07/2003 | US6502640 Hydraulic actuator |
| 01/03/2003 | WO2003001019A2 Sleeve valve and method for providing a controllable fluid flow |
| 01/02/2003 | US20030000706 High impact communication and control system |
| 01/02/2003 | US20030000702 Apparatus and method for sequentially packing an interval of a wellbore |
| 01/02/2003 | EP1131533A4 Tubular filling system |
| 01/01/2003 | CN2528929Y Underground control valve |
| 12/31/2002 | CA2201497C System for pumping well fluids |
| 12/26/2002 | US20020194907 Method and apparatus for the detection of bubble point pressure |
| 12/25/2002 | CN2527702Y Ring type flowsheet wellhead combined valve |
| 12/25/2002 | CN2527701Y Wellhead device for oil extraction |
| 12/25/2002 | CN1097134C Grouting pipe equipment and method of grouting using same for underground water well |
| 12/24/2002 | US6497290 Method and apparatus using coiled-in-coiled tubing |
| 12/24/2002 | US6497288 Deviated borehole drilling assembly |
| 12/24/2002 | US6497286 Method and apparatus for drilling a plurality of offshore underwater wells |
| 12/24/2002 | US6497280 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 12/24/2002 | US6497278 Circulation control device |
| 12/24/2002 | US6497277 Internal gate valve for flow completion systems |
| 12/19/2002 | US20020189815 Flow control regulation method and apparatus |
| 12/19/2002 | US20020189814 Automatic tubing filler |
| 12/19/2002 | US20020189813 Flow completion system |
| 12/18/2002 | EP0932790B1 Undersea hydraulic connector with equalization channel |
| 12/18/2002 | CN2526502Y Layered constant steam distributing valve for thickened oil heat recovery well |
| 12/18/2002 | CN2526501Y Device for preventing oil from being stolen for 250 style valve of pumping well |
| 12/18/2002 | CN2526500Y Anti-theft fast ball valve |
| 12/18/2002 | CN1385594A Intelligent water blocking valve used under well |
| 12/17/2002 | US6494269 Downhole apparatus for controlling fluid pressure |
| 12/17/2002 | US6494266 Controls bridge for flow completion systems |
| 12/17/2002 | US6494265 Flow control device |
| 12/17/2002 | US6494264 Wellbore flow control device |
| 12/17/2002 | US6494257 Flow completion system |
| 12/17/2002 | US6494256 Apparatus and method for zonal isolation |
| 12/12/2002 | US20020185280 Internal gate valve for flow completion systems |
| 12/11/2002 | EP1264076A1 Multi-purpose float equipment and method |
| 12/11/2002 | EP1264073A1 Downhole surge pressure reduction and filtering apparatus |
| 12/11/2002 | EP1064451B1 Pressure actuated downhole tool |
| 12/11/2002 | CN2525247Y Simple anti-theft well head device |
| 12/10/2002 | US6491106 Method of controlling a subsurface safety valve |
| 12/10/2002 | US6491102 Downhole multiplexer and related methods |
| 12/10/2002 | US6490916 Method and system of fluid analysis and control in a hydrocarbon well |
| 12/04/2002 | EP1261974A1 In-well monitoring and flow control system |
| 12/04/2002 | EP1214496A4 Electrical surface activated downhole circulating sub |
| 12/03/2002 | US6488083 Tubing hanger system |
| 11/28/2002 | US20020174988 Fill up tool and mud saver for top drives |
| 11/28/2002 | US20020174985 Positive indication system for well annulus cement displacement |
| 11/28/2002 | US20020174981 Downhole device for controlling fluid flow in a well |
| 11/27/2002 | EP1260671A1 Check valve for rig top drive |
| 11/27/2002 | EP1259710A1 Oilwell casing electrical power pick-off points |
| 11/27/2002 | EP1259708A2 Wireless power and communications cross-bar switch |
| 11/27/2002 | EP1259707A1 Wireless downhole well interval inflow and injection control |
| 11/27/2002 | EP1259706A2 Use of downhole high pressure gas in a gas-lift well |
| 11/27/2002 | EP1259705A1 Electro-hydraulically pressurized downhole valve actuator |
| 11/27/2002 | EP1259702A1 Power generation using batteries with reconfigurable discharge |
| 11/27/2002 | EP1259701A1 Controlled downhole chemical injection |
| 11/27/2002 | EP1259700A1 Tracer injection in a production well |
| 11/26/2002 | US6484800 Downhole flow control devices |
| 11/26/2002 | CA2227642C Linear indexing apparatus with selective porting |
| 11/24/2002 | CA2387195A1 Fill up tool and mud saver for top drives |
| 11/21/2002 | WO2002064942A3 Downhole packer |
| 11/21/2002 | WO2002059485B1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift |
| 11/21/2002 | US20020170719 Apparatus and method for locking open a flow control device |
| 11/20/2002 | EP0907821B1 Christmas tree |
| 11/20/2002 | CN2521385Y Adjustable natural gas well head and external transportation pipe net work safety protector |
| 11/19/2002 | US6481505 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 11/19/2002 | US6481494 Method and apparatus for frac/gravel packs |
| 11/19/2002 | US6481329 System for remote control and operation |
| 11/19/2002 | CA2208613C Flow restriction device for use in producing wells |
| 11/14/2002 | WO2002068793A8 Ball activated tool for use in downhole drilling |
| 11/14/2002 | US20020166665 Zero drill completion and production system |
| 11/13/2002 | CN2520408Y High-strength blowout prevention unloading zero clearance connecting-tripping device |
| 11/12/2002 | US6478090 Method and apparatus of operating devices using actuators having expandable or contractable elements |
| 11/07/2002 | WO2002088519A1 Wellhead product testing system |
| 11/07/2002 | WO2002088514A1 Automatic tubing filler |
| 11/07/2002 | WO2002088513A1 Flow control apparatus for use in a wellbore |
| 11/07/2002 | US20020162661 Delayed opening ball seat |
| 11/05/2002 | US6474362 Latching hydroseal valve |
| 11/04/2002 | CA2384454A1 Valve assembly |
| 10/31/2002 | WO2002086282A1 Wireline retrievable safety valve with radial cutting device |
| 10/31/2002 | US20020157837 Flow control apparatus for use in a wellbore |
| 10/31/2002 | US20020157825 Low-flow groundwater sampling system |
| 10/30/2002 | EP1253284A2 Apparatus for formation testing |
| 10/30/2002 | EP1252440A1 Controlling activation of devices |
| 10/30/2002 | EP1252416A1 Choke inductor for wireless communication and control in a well |
| 10/30/2002 | EP1252414A1 Method and operating devices having expandable element actuators |
| 10/30/2002 | CN2519016Y Snubbing service downhole switching device |
| 10/29/2002 | US6470971 Tubing head control and pressure monitor device |
| 10/29/2002 | US6470970 Multiplier digital-hydraulic well control system and method |
| 10/29/2002 | CA2054782C Enhanced response device for non-flowing deviated wells |
| 10/24/2002 | WO2002084071A1 Method and apparatus for controlling downhole flow |
| 10/24/2002 | US20020153143 Tubing hanger with flapper valve |
| 10/24/2002 | US20020153139 Subsurface safety valve lock out and communication tool and method for use of the same |
| 10/24/2002 | US20020153138 Downhole cementing system |
| 10/23/2002 | EP1250514A1 Downhole wireless two-way telemetry system |
| 10/23/2002 | EP1250513A1 System and method for fluid flow optimization in a gas-lift oil well |