| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 04/03/2007 | US7198099 Method and system for injecting a treatment fluid into a well |
| 04/03/2007 | CA2337337C Multi-line back pressure control system |
| 03/29/2007 | WO2007034136A2 Sub-surface deployment valve |
| 03/29/2007 | US20070068680 Deep set safety valve |
| 03/29/2007 | CA2621053A1 Sub-surface deployment valve |
| 03/28/2007 | EP1767742A2 System and method for fail-safe disconnect from a subsea well |
| 03/28/2007 | CN1936267A Pressure-controlled bridging system |
| 03/27/2007 | US7195033 Method and system for determining and controlling position of valve |
| 03/22/2007 | WO2006034214A3 Downhole safety valve apparatus and method |
| 03/21/2007 | CN2881082Y Forced single flow valve |
| 03/21/2007 | CN2881081Y Antitheft device of oil gas well valve |
| 03/21/2007 | CN2881080Y 方钻杆回压阀 Kelly back pressure valve |
| 03/21/2007 | CN2881079Y Blowout prevention oil extraction tree |
| 03/20/2007 | US7191844 Inflate control system for inflatable straddle stimulation tool |
| 03/20/2007 | US7191843 Valve apparatus with seal assembly |
| 03/20/2007 | US7191838 Method and apparatus for pumping wells with a sealing fluid displacement device |
| 03/20/2007 | US7191830 Annular pressure relief collar |
| 03/15/2007 | WO2007030336A2 C-plate assembly for use in a cable guided fishing assembly |
| 03/15/2007 | US20070056774 Apparatus and methods for drilling a wellbore using casing |
| 03/15/2007 | US20070056747 Seal assembly energized with floating pistons |
| 03/15/2007 | US20070056724 Downhole Actuation Tools |
| 03/14/2007 | EP1332273B1 Downhole valve device |
| 03/14/2007 | CN2878663Y Constant pressure valve and anti-spray device for bushing |
| 03/14/2007 | CN1930369A Expander for expanding a tubular element |
| 03/13/2007 | US7188674 Downhole milling machine and method of use |
| 03/13/2007 | CA2343095C In situ borehole sample analyzing probe and valved casing coupler therefor |
| 03/08/2007 | WO2007027617A2 Inflow control device with passive shut-off feature |
| 03/08/2007 | WO2007026142A1 Improvements in or relating to esp completions |
| 03/08/2007 | WO2007026141A1 Improvements in or relating to esp completion systems |
| 03/08/2007 | WO2007026072A1 Safety device for an oil well and associated safety installation |
| 03/08/2007 | WO2006134446A3 Novel activating mechanism for controlling the operation of a downhole tool |
| 03/08/2007 | CA2616501A1 Safety device for an oil well and associated safety installation |
| 03/07/2007 | EP1760253A1 Seal stack for sliding sleeve |
| 03/07/2007 | CN2876321Y Land well antitheft valve |
| 03/07/2007 | CN2876320Y Throttle valve of gas production well |
| 03/07/2007 | CN1924292A Multifunctional choke plug for oil sample fetching |
| 03/06/2007 | US7185706 Arrangement for and method of restricting the inflow of formation water to a well |
| 03/01/2007 | WO2007024627A2 Sand control screen assembly enhanced with disappearing sleeve and burst disc |
| 03/01/2007 | WO2007003894A3 Wellbore cleaning method and apparatus |
| 03/01/2007 | WO2006041811A3 Downhole safety valve apparatus and method |
| 03/01/2007 | US20070044971 C-plate assembly for use in a cable guided fishing assembly |
| 02/28/2007 | EP1756397A1 Plug setting and retrieving apparatus |
| 02/28/2007 | EP1756393A1 Valve seat |
| 02/28/2007 | CN2874015Y Internal slip-type oil drain device |
| 02/28/2007 | CN2874014Y Water injection pipe string bottom valve |
| 02/28/2007 | CN2874013Y Anti-splash valve of kelly |
| 02/28/2007 | CN1922385A Method and actuator device |
| 02/28/2007 | CN1920244A Two-power two-sealing sing-valve two-control type well mouth device for oil injection and production |
| 02/27/2007 | US7182139 System and method for controlling downhole tools |
| 02/27/2007 | US7182138 Reservoir communication by creating a local underbalance and using treatment fluid |
| 02/22/2007 | WO2007021422A2 Triple valve blow out preventer |
| 02/22/2007 | WO2006041842A3 Expansion pig |
| 02/21/2007 | EP1754856A2 Recovery of production fluids from an oil or gas well |
| 02/21/2007 | CN2871825Y Reciprocating oil releaser |
| 02/21/2007 | CN2871824Y Water-jetting single flowing valve of gravity push stop |
| 02/21/2007 | CN1916356A Method for raising wear-resistance of by-pass valve in screw motive drilling tool |
| 02/21/2007 | CN1916355A Adjustable valve for controlling magnitude of solid powder flow rate |
| 02/20/2007 | US7178600 Apparatus and methods for utilizing a downhole deployment valve |
| 02/20/2007 | US7178599 Subsurface safety valve |
| 02/20/2007 | CA2435268C Sliding sleeve valve |
| 02/15/2007 | US20070034385 Pulse width modulated downhole flow control |
| 02/15/2007 | US20070034380 Subsurface Annular Safety Barrier |
| 02/15/2007 | US20070034379 Plug installation system for deep water subsea wells |
| 02/15/2007 | US20070034377 Downhole non-return valve and method |
| 02/15/2007 | US20070034369 Controlling transient pressure conditions in a wellbore |
| 02/14/2007 | CN2869305Y Underground control valve |
| 02/14/2007 | CN2869304Y Screw drilling tool bypass valve |
| 02/14/2007 | CN2869303Y Blow-out proof ball seat |
| 02/14/2007 | CN2869302Y Oil pipe blow-out lifting device |
| 02/14/2007 | CN2869294Y Anti-theft well sealing decompression device |
| 02/14/2007 | CN2869287Y Self-locking oil pipe discharge anchor |
| 02/14/2007 | CN2869285Y Oil well flushing protector |
| 02/14/2007 | CN1912335A Sealing process for preventing block of kelly bar plug valve |
| 02/13/2007 | US7175748 Subsea production system |
| 02/13/2007 | US7175156 Throttle device |
| 02/13/2007 | CA2396136C Improved travelling valve for a pumping apparatus |
| 02/13/2007 | CA2359566C Hydraulic distributor |
| 02/08/2007 | US20070029093 Pressure range delimited valve |
| 02/08/2007 | US20070029078 Multicycle hydraulic control valve |
| 02/07/2007 | EP1750051A2 Gas cylinder with manual on/off and valve |
| 02/07/2007 | EP1749141A1 Downhole tool |
| 02/07/2007 | CN1910337A Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
| 02/07/2007 | CN1908365A Control system of well mouth release valve |
| 02/07/2007 | CN1298961C Method for treating multiple wellbore intervals |
| 02/06/2007 | US7172021 Liner hanger with sliding sleeve valve |
| 02/06/2007 | CA2549080A1 Pressure range delimited valve |
| 02/04/2007 | CA2555146A1 Protected integral gas cylinder with manual on/off and flow control valve |
| 02/01/2007 | WO2007014009A1 Downhole non-return valve and method |
| 01/31/2007 | CN2864087Y Underwell anti-injection oil discharger |
| 01/31/2007 | CN2864086Y Normal temperature water injection device for oil field well mouth |
| 01/31/2007 | CN2864084Y Mechanical oil extraction used anti-theft safety device for well mouth |
| 01/30/2007 | US7168493 Downhole tool |
| 01/30/2007 | US7168492 Wellbore annulus flushing valve |
| 01/25/2007 | US20070017708 Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
| 01/24/2007 | EP1327051B1 Dual valve well control in underbalanced wells |
| 01/24/2007 | CN2861474Y Ground opening device for subsurface safety valve |
| 01/24/2007 | CN2861473Y Automatic adjusting mechanism of water mouth capable of preventing sand and sludge blocking |
| 01/24/2007 | CN2861472Y Sand-discharging well-cleaning valve of water-flooding pipe string |
| 01/24/2007 | CN2861466Y Downwell automatic plugging device for snubbing unit without digging and spraying |
| 01/24/2007 | CN2861465Y Explosion-proof two-way locking valve for bushing external casing packer |