| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
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| 03/04/2008 | US7337852 Run-in and retrieval device for a downhole tool |
| 03/04/2008 | US7337847 Multi-cycle downhole apparatus |
| 03/04/2008 | US7337846 Surface controlled subsurface lateral branch safety valve |
| 03/04/2008 | CA2247310C Method and system of measurement in a horizontal pipe |
| 02/29/2008 | CA2599802A1 Downhole isolation valve and methods for use |
| 02/28/2008 | WO2008024859A1 Downhole tractor with turbine- powered motor |
| 02/28/2008 | US20080047715 Wellbore tractor with fluid conduit sheath |
| 02/27/2008 | EP1583886A4 Isolated electrical connection in a drill string |
| 02/27/2008 | CN201027511Y Midway sealing proof device of drillable downhole tool |
| 02/27/2008 | CN201027510Y Anchorage device of oil pumping tubing string |
| 02/27/2008 | CN201027509Y Annulus compression fracture hanger |
| 02/27/2008 | CN201027508Y Novel oil tube draining anchorage device |
| 02/27/2008 | CN101133229A Expandable tubular component with variable material character |
| 02/27/2008 | CN101131074A Hanger of minor-diameter pipe subsurface agent and gas pouring device |
| 02/26/2008 | US7334642 Constant force actuator |
| 02/23/2008 | CA2558115A1 Mechanical setting tool for an expandable packer |
| 02/21/2008 | WO2008021703A1 System and method for pressure isolation for hydraulically actuated tools |
| 02/21/2008 | US20080041631 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 02/21/2008 | US20080041597 Releasing and recovering tool |
| 02/21/2008 | US20080041583 Anchoring device for a wellbore tool |
| 02/20/2008 | EP1888871A1 Casing and drill pipe filling and circulation apparatus |
| 02/20/2008 | EP1794409B1 Thruster pig |
| 02/20/2008 | CN201024978Y A fixing device for hierarchical concrete injection tool |
| 02/20/2008 | CN201024942Y Drilling free blind plate device |
| 02/20/2008 | CN201024941Y Sifting tube suspender |
| 02/20/2008 | CN201024940Y Built-in rotary end tube suspender |
| 02/20/2008 | CN201024939Y Testing and unloading device for preventive petroleum pump power illustration |
| 02/20/2008 | CN201024938Y A hydraulic pressure release and salvage tool |
| 02/19/2008 | US7331387 Downhole window finder and method of using the same |
| 02/19/2008 | CA2471394C Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder |
| 02/19/2008 | CA2466223C Method for removing a tool from a well |
| 02/19/2008 | CA2454227C Torque anchor |
| 02/13/2008 | EP1885994A1 A device for selective movement of well tools and also a method of using same |
| 02/13/2008 | EP1885991A1 Spearhead assembly |
| 02/13/2008 | CN201021608Y Suspender for extensible full-pass diameter end pipe of top pressure clip block |
| 02/13/2008 | CN101124383A Improved anchor arm for seismic logging tool |
| 02/13/2008 | CN101122221A Hydraulic expansion type screen pipe hanger |
| 02/13/2008 | CN101122220A Swelling type screen pipe suspension method and swelling type screen pipe hanger |
| 02/13/2008 | CN101122214A Mechanical swelling type screen pipe hanger |
| 02/13/2008 | CN101122213A Oil pipe column dropping prevention anchor |
| 02/12/2008 | US7328742 Seal cup for a wellbore tool and method |
| 02/12/2008 | CA2425242C Downhole crossover tool with chemical treating or packer inflation features |
| 02/12/2008 | CA2392277C Bottom hole assembly |
| 02/12/2008 | CA2300004C Electronically controlled electric wireline setting tool |
| 02/07/2008 | US20080029305 Mechanical parts having increased wear resistance |
| 02/07/2008 | US20080029275 System and method for pressure isolation for hydraulically actuated tools |
| 02/07/2008 | US20080029269 Method and system for installing equipment for production and injection operations |
| 02/07/2008 | US20080029265 Combined Anti-Rotation and Flow Control Tool |
| 02/07/2008 | CA2762000A1 Downhole tool retrieval and setting system |
| 02/07/2008 | CA2597966A1 Downhole tool retrieval and setting system |
| 02/06/2008 | CN201016285Y Compressing-proof electric pump well mouth hanger |
| 02/06/2008 | CN101117885A Well control method for changing valve under pressure |
| 02/05/2008 | US7325618 Tubing expansion tool |
| 02/05/2008 | US7325602 Method and apparatus for forming a mono-diameter wellbore casing |
| 02/05/2008 | CA2454594C Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 01/31/2008 | US20080023205 System and Method for Maintaining Zonal Isolation in a Wellbore |
| 01/31/2008 | US20080023195 Hydrodynamic, down-hole anchor |
| 01/31/2008 | US20080023194 Liner hanger |
| 01/31/2008 | US20080023191 Hanger flange for hanging a tubular body in a well |
| 01/30/2008 | CN201013307Y Setting sealing repeatable hydraulic anchoring draining device |
| 01/30/2008 | CN201013282Y Novel prevention waterpower anchor |
| 01/30/2008 | CN201013281Y Special tool for eccentric mine mouth dismounting |
| 01/30/2008 | CN201013280Y Backpressure valve hydraulic fetching apparatus |
| 01/29/2008 | US7322422 Inflatable packer inside an expandable packer and method |
| 01/29/2008 | US7322420 Tubing expansion |
| 01/29/2008 | US7322419 Circulating sub and method |
| 01/29/2008 | US7322416 Methods of servicing a well bore using self-activating downhole tool |
| 01/29/2008 | CA2334470C Method and system for moving equipment into and through a conduit |
| 01/29/2008 | CA2305720C Method and apparatus for hanging tubulars in wells |
| 01/24/2008 | US20080017390 Isolation tool |
| 01/24/2008 | US20080017389 Electric pressure actuating tool and method |
| 01/24/2008 | US20080017388 Well string injection system and method |
| 01/24/2008 | US20080017375 Apparatus and Method for Use in a Well Bore |
| 01/23/2008 | EP1880077A1 Pulling tool for use in oil and gas wells |
| 01/22/2008 | US7320373 One-step directional coring or drilling system |
| 01/22/2008 | US7320366 Assembly of downhole equipment in a wellbore |
| 01/22/2008 | CA2494484C Annular barrier tool |
| 01/22/2008 | CA2476720C Placing fiber optic sensor line |
| 01/22/2008 | CA2475671C Method of repair of collapsed or damaged tubulars downhole |
| 01/22/2008 | CA2386930C Positioning and conveying well apparatus and method |
| 01/17/2008 | WO2008007970A1 Coupling device |
| 01/17/2008 | US20080011472 Downhole tool operated by shape memory material springs |
| 01/17/2008 | US20080011471 Low pressure-set packer |
| 01/17/2008 | US20080011469 Fracturing isolation sleeve |
| 01/16/2008 | EP1877644A1 Gripping tool |
| 01/15/2008 | US7318479 Assembly for connecting a jumper to a subsea structure |
| 01/15/2008 | CA2462658C Through tubing whipstock |
| 01/15/2008 | CA2449340C Wellbore apparatus and method |
| 01/15/2008 | CA2364271C Hydraulic strain sensor |
| 01/15/2008 | CA2187432C Production wells having permanent downhole formation evaluation sensors |
| 01/10/2008 | WO2008005495A1 Step ratchet mechanism |
| 01/10/2008 | WO2006020726A3 Radial expansion system |
| 01/09/2008 | EP1339950B1 Full bore automatic gun release module |
| 01/09/2008 | CN101103175A Gravel pack shut tube with control line retention and method for retaining control |
| 01/08/2008 | US7316274 One trip perforating, cementing, and sand management apparatus and method |
| 01/08/2008 | US7316271 Deformable member |
| 01/08/2008 | CA2522910C Liner hanger |
| 01/08/2008 | CA2473495C System and method for autonomously performing a downhole well operation |
| 01/08/2008 | CA2341080C Releasable no-go tool |
| 01/08/2008 | CA2309513C Hydraulic set liner hanger setting mechanism and method |