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)
06/2003
06/05/2003US20030103811 Control cable
06/05/2003US20030102135 Crossover tree system
06/04/2003EP1315881A1 Method and system for perforating
06/04/2003EP0876546B1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector
06/04/2003CN2554344Y Reversable pressure stop ball seat
06/04/2003CN2554343Y Normally open uniflow valve
06/04/2003CN2554342Y Water well anti-relief valve
06/03/2003US6571880 Method and multi-purpose apparatus for control of fluid in wellbore casing
06/03/2003US6571876 Fill up tool and mud saver for top drives
06/03/2003US6571875 Circulation tool for use in gravel packing of wellbores
06/03/2003US6571869 Downhole surge pressure reduction and filtering apparatus
05/2003
05/29/2003US20030098151 Insert assembly for a wellhead choke valve
05/28/2003CN2553106Y Water nozzle valve for separate injection well of oil field
05/28/2003CN2553105Y Three-protecting controller for well head
05/27/2003US6568473 Gas lift valve with central body venturi
05/27/2003US6568470 Downhole actuation system utilizing electroactive fluids
05/22/2003WO2003042498A1 Optical position sensing for well control tools
05/22/2003US20030094285 Valve assembly
05/22/2003US20030094278 Expansion cone for radially expanding tubular members
05/22/2003US20030094277 Expansion cone for radially expanding tubular members
05/21/2003EP1312750A2 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
05/21/2003CN2551762Y Forced high-pressure float coupling
05/21/2003CN2551761Y Flow diverter assembly for drilling well
05/21/2003CN2551760Y Integrated christmas tree
05/20/2003US6567013 Digital hydraulic well control system
05/20/2003US6564876 Packer
05/20/2003US6564867 Method and apparatus for cementing branch wells from a parent well
05/15/2003WO2003040517A1 Docking station assembly and methods for its use in a wellbore
05/15/2003US20030089505 Downhole surge pressure reduction and filtering apparatus
05/15/2003US20030089504 Gun brake device
05/15/2003US20030089500 Pressure equalizing plunger valve for downhole use
05/15/2003US20030089498 Controlling transient underbalance in a wellbore
05/14/2003EP1309770A1 Flow control device
05/14/2003EP1112438B1 $i(IN SITU) BOREHOLE SAMPLE ANALYZING PROBE AND VALVED CASING COUPLER THEREFOR
05/14/2003CN2550495Y Downhole bailing device
05/14/2003CN2550494Y 泄油器 Bleeder
05/14/2003CN2550493Y Hydraulic impact deblocking device for water injection well
05/14/2003CN2550492Y Integrated throttle well control pipe manifold
05/14/2003CN2550491Y Multifunction wellhead
05/14/2003CN2550490Y Anti-theft anti-bias friction rubber gate
05/14/2003CN1418283A Filter cake cleanup and gravel pack methods for oil based or water based drilling fluids
05/13/2003US6561276 Bore selector
05/08/2003WO2003038236A1 Method and system for controlling a downhole flow control device using derived feedback control
05/08/2003WO2003038234A1 Completion device for an installation that is used to exploit underground fluids
05/08/2003WO2003038228A2 Tubing hanger with ball valve
05/08/2003US20030085815 Docking station assembly and methods for use in a wellbore
05/08/2003US20030085038 Sand screen with integrated sensors
05/07/2003EP1307633A1 Activating ball assembly for use with a by-pass tool in a drill string
05/07/2003CN2549174Y Leakage valve
05/07/2003CN2549173Y Mechanical downhole switch
05/07/2003CN2549172Y 双通道旋塞阀 Dual Plug
05/06/2003US6557637 Subsea riser disconnect and method
05/06/2003US6557631 Down hole tension/compression device for logging tools
05/06/2003CA2101446C Well completion system
05/06/2003CA2042328C Balanced sleeve control choke
05/05/2003CA2408425A1 Apparatus and method for downhole well equipment and process management, identification, and operation
05/02/2003EP1306518A2 Sand control screen assembly having an adjustable flow rate and associated methods of completing a subterranean well
05/02/2003EP0801704B1 Method for injecting fluid into a wellbore
05/01/2003WO2003036019A1 Pressure equalizing plunger valve for downhole use
05/01/2003US20030079880 Curved flapper and seat for a subsurface safety valve
05/01/2003US20030079878 Completion system, apparatus, and method
04/2003
04/30/2003CN2547870Y Magnetic oil-drain device
04/30/2003CN2547869Y Antitheft rotary-post stuffing valve
04/29/2003US6554076 Hydraulically activated selective circulating/reverse circulating packer assembly
04/29/2003US6554064 Method and apparatus for a sand screen with integrated sensors
04/29/2003US6554016 Rotating blowout preventer with independent cooling circuits and thrust bearing
04/24/2003WO2003033864A1 Method of progressively gravel packing a zone
04/24/2003WO2003033857A2 Flow control mechanism for a downhole tool
04/24/2003US20030075336 Subsurface safety valve lock out and communication tool and method for use of the same
04/24/2003US20030075324 To stimulate hydrocarbon production and prevent the production of fine particulate materials
04/23/2003CN2546626Y Well pumping
04/23/2003CN2546625Y Protector for often shut-down well
04/22/2003US6550551 Apparatus to actuate a downhole tool
04/22/2003US6550541 Valve assembly
04/17/2003US20030070817 Subsurface safety valve lock out and communication tool and method for use of the same
04/17/2003US20030070809 Method of progressively gravel packing a zone
04/17/2003US20030070806 Apparatus and method for locating joints in coiled tubing operations
04/16/2003EP1302624A1 Locating joints in coiled tubing operations
04/16/2003EP1301685A2 Improvements in valves
04/16/2003CN2545361Y Hydraulic driven rotary oil pipe wellhead device
04/15/2003US6547008 Well operations system
04/15/2003US6547007 PDF valve
04/10/2003US20030066653 Method and apparatus for controlling well pressure in open-ended casing
04/09/2003EP0996826B1 Hydraulic fluid actuator with metal to metal seals
04/09/2003EP0975992A4 Pressure impulse telemetry apparatus and method
04/09/2003CN2544098Y Pressure-decreasing type filling signal sand proof sieve pipe
04/09/2003CN2544095Y Constant quantity vapour filling valve
04/09/2003CN2544094Y Blowing preventing valve
04/09/2003CN1408983A Method and equipment for solving air screw rod drill tool runaway problem
04/08/2003US6543544 Low power miniature hydraulic actuator
04/08/2003US6543543 Pump systems and methods
04/08/2003US6543541 Access control between a main bore and a lateral bore in a production system
04/08/2003US6543532 Electrical surface activated downhole circulating sub
04/08/2003CA2235022C Variable orifice gas lift valve assembly for high flow rates with detachable power source and method of using same
04/08/2003CA2044887C Horizontal inflatable tool
04/02/2003EP1297243A1 Method and system for stepwise varying fluid flow in a well
04/02/2003EP1297241A1 Method for drilling and casing a wellbore with a pump down cement float
04/02/2003EP0960261B1 Tool and method for drilling a lateral well
04/02/2003EP0944766B1 System for controlling and stopping oil drilling fires
04/02/2003CN2542825Y Formation protective device for downhole clean-out operation
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