| Patents for E21B 41 - Equipment or details not covered by groups (7,984) |
|---|
| 04/15/2008 | US7357182 Method and apparatus for completing lateral channels from an existing oil or gas well |
| 04/15/2008 | CA2418758C Interactive and/or secure activation of a tool |
| 04/10/2008 | US20080083540 Apparatus and methods for tubular makeup interlock |
| 04/09/2008 | EP1908682A1 Arrangement of an accoustic array with a sound velocity meter |
| 04/09/2008 | EP1563161B1 Re-entry in multilateral wellbores |
| 04/09/2008 | CN100379936C Automatically controlled rotation-controllable drilling system |
| 04/08/2008 | US7353889 Rotary driven pipe-bursting tool |
| 04/08/2008 | US7353878 Apparatus and method for wellbore isolation |
| 04/08/2008 | CA2517410C Automated chemical stick loader for gas wells and method of loading |
| 04/03/2008 | US20080078586 Mud systems with pressure relief valve |
| 04/02/2008 | EP1805394B1 Movable supporting construction |
| 04/01/2008 | US7350584 Formed tubulars |
| 04/01/2008 | US7350577 Method and apparatus for injecting steam into a geological formation |
| 04/01/2008 | CA2308944C Well reference apparatus and method |
| 03/27/2008 | WO2008036572A1 Gas activated actuator device for downhole tools |
| 03/27/2008 | WO1999057417A3 Chemical actuation system for downhole tools and method for detecting failure of an inflatable element |
| 03/27/2008 | CA2669739A1 Gas activated actuator device for downhole tools |
| 03/26/2008 | EP1902195A1 Downhole force generator |
| 03/26/2008 | EP1454028B1 Proppant recovery system |
| 03/25/2008 | US7347278 Secure activation of a downhole device |
| 03/25/2008 | US7347259 Downhole oilfield erosion protection by using diamond |
| 03/20/2008 | WO2008033411A1 Safety pin |
| 03/20/2008 | US20080066903 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/19/2008 | EP1899574A1 Well having inductively coupled power and signal transmission |
| 03/13/2008 | US20080060807 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | US20080060806 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | US20080060805 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | US20080060804 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | US20080060799 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | US20080060571 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 03/13/2008 | CA2663456A1 Method for controlled placement of additives in oil and gas production |
| 03/12/2008 | EP1898045A1 Electrically operated well tools |
| 03/11/2008 | CA2492082C Extraction of hydrocarbons from a wellbore and the generation of electrical energy therefrom without exhausing waste gas to the atmosphere |
| 03/11/2008 | CA2468306C Subsea communications network |
| 03/11/2008 | CA2447270C Expanding tubing |
| 03/05/2008 | EP1893843A1 Apparatus and method for transferring fluids from a floating vessel to a subsea intervention module |
| 03/05/2008 | CN201031678Y Oil well automatically power feeding device |
| 03/05/2008 | CN201031665Y High-pressure well head unpowered power feeding device |
| 03/04/2008 | US7337846 Surface controlled subsurface lateral branch safety valve |
| 02/28/2008 | WO2008024881A1 Downhole tool with closed loop power systems |
| 02/27/2008 | EP1891297A2 Novel activating mechanism for controlling the operation of a downhole tool |
| 02/27/2008 | EP1718841B1 Annular pressure relief collar |
| 02/26/2008 | US7336474 Microelectromechanical devices |
| 02/26/2008 | US7334652 Roller cone drill bits with enhanced cutting elements and cutting structures |
| 02/26/2008 | US7334650 Apparatus and methods for drilling a wellbore using casing |
| 02/26/2008 | CA2376211C Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 02/21/2008 | US20080041585 Methods of Using Casing Strings in Subterranean Cementing Operations |
| 02/21/2008 | US20080041584 Methods of Using Casing Strings in Subterranean Cementing Operations |
| 02/21/2008 | US20080041576 Communicating electrical energy with an electrical device in a well |
| 02/20/2008 | EP1889999A1 Method of optimising the assisted recovery of a fluid placed in a porous medium by front follow-up |
| 02/20/2008 | EP1664482B1 A liquid seal for recovering flared gas |
| 02/20/2008 | EP1277162A4 Field programmable smart card terminal and token device |
| 02/20/2008 | CN201024998Y Automatic drug addition device |
| 02/20/2008 | CN201024997Y A surrounding drug addition device for under-well eccentric and dragging bushing |
| 02/20/2008 | CN201024920Y Wax cleaning, friction deviation preventive and antiseptic tool |
| 02/19/2008 | USRE40067 Downhole equipment tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes |
| 02/19/2008 | US7331387 Downhole window finder and method of using the same |
| 02/14/2008 | WO2008017937A1 Improvements in or relating to water suction hoses |
| 02/14/2008 | WO2008017895A1 Method and apparatus for well operations |
| 02/14/2008 | WO2008017849A1 Treating liquids in oil extraction |
| 02/14/2008 | CA2666490A1 Method and apparatus for well operations |
| 02/14/2008 | CA2663963A1 Treating liquids in oil extraction |
| 02/12/2008 | US7330779 Method and system for improving pump efficiency and productivity under power disturbance conditions |
| 02/12/2008 | US7328744 Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids |
| 02/12/2008 | CA2287606C Vacuum tank for use in handling oil and gas well cuttings |
| 02/12/2008 | CA2286018C High impact communication and control system |
| 02/07/2008 | US20080029308 Roller Cone Drill Bits With Optimized Cutting Zones, Load Zones, Stress Zones And Wear Zones For Increased Drilling Life And Methods |
| 02/07/2008 | CA2657122A1 Fluid flowrate determination |
| 02/05/2008 | US7325632 Nozzle bore for PDC bits |
| 02/05/2008 | US7325599 Safety shield for rotary drilling rigs |
| 02/03/2008 | CA2555023A1 Combined anti-rotation and flow control tool |
| 02/01/2008 | CA2554803A1 No turn tag bar and method of use of the same |
| 01/31/2008 | US20080023192 Method and device to clamp control lines to tubulars |
| 01/30/2008 | CN201013336Y Non-powered mine mouth dosing device |
| 01/29/2008 | US7322410 Controllable production well packer |
| 01/29/2008 | CA2533836C Method of ensuring that well tubing was properly stretched |
| 01/29/2008 | CA2320998C Method and system for drilling and completing underbalanced multilateral wells |
| 01/29/2008 | CA2187422C Downhole production well control system and method |
| 01/24/2008 | US20080017385 Buoyancy element and module |
| 01/23/2008 | EP1880080A1 Pressure responsive centralizer |
| 01/22/2008 | CA2386930C Positioning and conveying well apparatus and method |
| 01/22/2008 | CA2147300C Downhole signal conveying system |
| 01/18/2008 | CA2590566A1 Electrical submersible pumping systems having stirling coolers |
| 01/17/2008 | WO2008007967A1 Protection of process equipment with significant vapour pressure by adding an evaporating component to gas in contact with said equipment |
| 01/17/2008 | WO2007127899A3 Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools |
| 01/17/2008 | WO2007030336A3 C-plate assembly for use in a cable guided fishing assembly |
| 01/16/2008 | EP1689966B1 Nozzle unit and method for excavating a hole in an object |
| 01/15/2008 | US7318488 Method for classifying data measured during drilling operations |
| 01/15/2008 | CA2447317C Method and apparatus for downhole fluid characterization using flexural mechanical resonators |
| 01/15/2008 | CA2337221C Downhole well corrosion monitoring apparatus and method |
| 01/15/2008 | CA2238998C Remotely accessible mobile repair unit for wells |
| 01/10/2008 | WO2008005768A1 Hydraulic metering valve for operation of downhole tools |
| 01/10/2008 | WO2008004086A1 A subsea arrangement |
| 01/10/2008 | WO2008004084A1 A subsea switchgear apparatus |
| 01/09/2008 | EP1875033A2 Conductor pipe string deflector and method of using same |
| 01/09/2008 | CN201002944Y Dead line fixation winch dual-purpose equipment |
| 01/09/2008 | CN100360435C Method for inhibiting biogenic sulfide generation |
| 01/08/2008 | US7317990 Distributed processing system for subsurface operations |
| 01/08/2008 | US7317989 Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data |
| 01/08/2008 | US7316278 Method for determining drilling malfunction by correlation of drilling operating parameters and drilling response parameters |