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)
07/2005
07/06/2005CN2707954Y Oil drainer device
07/06/2005CN2707953Y Two-way dual purpose tubing plug valve
07/06/2005CN2707947Y Rotary production well head assembly motivated by external hydraulic cylinder
07/05/2005US6913240 Electrohydraulic control unit
07/05/2005US6913092 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling
07/05/2005CA2318323C Method and apparatus for selective injection or flow control with through-tubing operation capacity
07/05/2005CA2266693C Wellbore milling system
06/2005
06/30/2005WO2005059305A1 Modular hydrojetting tool
06/30/2005WO2005040544A9 Internal blow out preventer ball and seat
06/30/2005US20050139362 Seal stack for sliding sleeve
06/30/2005DE102004057165A1 Vorrichtung und Verfahren zum Untersuchen einer unterirdischen Formation Apparatus and method for inspecting a subterranean formation
06/29/2005EP1360418A4 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
06/28/2005CA2373969C Valve with secondary load bearing surface
06/23/2005WO2005056980A1 Controlling a fluid well
06/23/2005US20050133226 Modular hydrojetting tool
06/23/2005US20050133217 Hyraulically releasable inflation tool for permanent bridge plug
06/22/2005EP1544407A2 Underbalanced well completion
06/22/2005EP1544405A2 Underbalanced well completion
06/21/2005US6907936 Method and apparatus for wellbore fluid treatment
06/21/2005CA2261650C Swivel
06/16/2005WO2004099549A3 Self-set bridge plug
06/16/2005US20050126789 System and method for fail-safe disconnect from a subsea well
06/16/2005US20050126787 Lock mechanism for a sliding sleeve
06/15/2005EP1540132A1 Fast valve actuator and tool provided with same
06/15/2005CN2704684Y Wellhead assembled valve of pumping unit
06/14/2005US6904975 Interventionless bi-directional barrier
06/14/2005CA2218106C Cementing plug
06/09/2005WO2005052313A1 Improved valve
06/09/2005WO2005052302A2 Actuating mechanism
06/09/2005US20050121188 Controlling a fluid well
06/08/2005EP1537292A1 Ball operated by-pass tool for use in drillstring
06/08/2005EP1278936B1 Tubing hanger with annulus bore
06/08/2005CN2703869Y Casing gas constant-pressure recovery device
06/08/2005CN1624295A Downhole fluid pumping apparatus and method
06/07/2005US6902006 Lock open and control system access apparatus and method for a downhole safety valve
06/07/2005CA2306259C Prevention of sand plugging of oil well pumps
06/02/2005WO2005049954A2 Gravel pack crossover tool with single position multi-function capability
06/02/2005US20050115718 Flow control mechanism for a downhole tool
06/02/2005US20050115716 Downhole fluid pumping apparatus and method
06/02/2005US20050115714 Fast valve actuator and tool provided with same
06/02/2005US20050115619 Choke valve with temperature transmitter
06/02/2005DE102004048615A1 Well treatment system for achieving transient underbalance condition in wellbore, comprises surge charge adapted upon activation to penetrate housing and not penetrate material exterior of housing
06/01/2005EP1536100A2 Underbalanced well completion
06/01/2005EP1534920A2 Bulged single-hinged scored rupture disc having a non-circular varying depth score line
06/01/2005CN2703120Y Spring type sandproof ball burying base
06/01/2005CN1623029A Bulged single-hinged scored rupture disc having a non-circular varying depth score line
05/2005
05/31/2005US6899318 Wave seal to resist extrusion during equalization
05/31/2005US6899176 Sand control screen assembly and treatment method using the same
05/31/2005US6898968 Method and device for measuring a path that has been covered
05/26/2005WO2005047646A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
05/26/2005CA2826503A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
05/26/2005CA2526714A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
05/25/2005EP1377727B1 Method and apparatus for controlling downhole flow
05/25/2005CN1619096A Antifreezing sampling valve used for oilfield well
05/19/2005WO2005045191A1 Interventionless reservoir control systems
05/19/2005WO2005045184A1 Control system communication and lock open tool and method for locking open a safety valve and communicating with surface
05/19/2005WO2005045183A1 Method and system for injecting a treatment fluid into a well
05/19/2005WO2005045182A1 Chemical injection check valve incorporated into a tubing retrievable safety valve
05/19/2005WO2005045180A1 Actuating mechanism
05/19/2005WO2005045178A1 A disconnect device
05/19/2005US20050103495 Gravel pack crossover tool with single position multi-function capability
05/19/2005CA2645607A1 Chemical injection check valve incorporated into a tubing retrievable safety valve
05/19/2005CA2636681A1 Selective collet
05/19/2005CA2547200A1 Chemical injection check valve incorporated into a tubing retrievable safety valve
05/19/2005CA2544161A1 A disconnect device
05/18/2005CN2700549Y Integral type bridge valve used in oil extraction well
05/18/2005CN2700545Y Lost circulation prevention valve seal device
05/17/2005US6892818 Interchangeable choke assembly
05/17/2005US6892816 Method and apparatus for selective injection or flow control with through-tubing operation capacity
05/17/2005CA2369860C Sand screen with active flow control
05/17/2005CA2366139C Expandable packer isolation system
05/12/2005WO2004099558A3 Downhole shut-in tool
05/12/2005WO2004063607A3 Actuator for well-head valve or other similar applications and system incorporating same
05/12/2005US20050098325 Control system communication and lock open tool and method for locking open a safety valve and communicating with surface
05/12/2005US20050098324 Expandable tubular with port valve
05/12/2005US20050098210 Chemical injection check valve incorporated into a tubing retrievable safety valve
05/11/2005EP1529150A2 Electric power control for sickline operations in wellbores
05/11/2005CN2698967Y Oil-well pump standing valve capable of depositing sediment
05/11/2005CN2698966Y Hydraulic down-hole casing valve for under balance drilling
05/11/2005CN2698965Y Sand prevention device used in oil well bottom
05/10/2005US6889771 Selective direct and reverse circulation check valve mechanism for coiled tubing
05/06/2005WO2005040833A1 Regulation of human metastin recognising receptors
05/06/2005WO2005040544A2 Internal blow out preventer ball and seat
05/05/2005US20050095156 Method and apparatus to isolate a wellbore during pump workover
05/05/2005US20050092501 Interventionless reservoir control systems
05/05/2005US20050092488 Pressure Control Apparatus and Method
05/04/2005EP1528149A1 Low consistency oxygen delignification process
05/04/2005CN2697311Y Pipe assembly for quick releasing casing pressure
05/04/2005CN2697310Y Under-balance downhole casing-valve
05/04/2005CN2697309Y Series magnetic blowing preventer
05/04/2005CN2697308Y Novel double-valve slag-proof device
05/03/2005US6886598 Choke restrictor devices and methods
05/03/2005US6886406 Downhole deposition monitoring system
04/2005
04/28/2005US20050087344 System and Method to Control Multiple Tools Through One Control Line
04/28/2005US20050087338 Disconnect device
04/28/2005US20050087337 Liner hanger with sliding sleeve valve
04/28/2005US20050087335 Deep set safety valve
04/28/2005US20050087315 Low consistency oxygen delignification process
04/28/2005CA2484557A1 Low consistency oxygen delignification process
04/27/2005CN2695623Y Tap for well repairing
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