| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 08/18/2009 | US7575051 Downhole vibratory tool |
| 08/14/2009 | CA2653826A1 Methods of retrieving data from a pipe conveyed well logging assembly |
| 08/13/2009 | US20090200012 Downhole Debris Catcher and Associated Mill |
| 08/06/2009 | US20090194285 Method for jarring with a downhole pulling tool |
| 08/05/2009 | EP2085570A2 Method for jarring with a downhole pulling tool |
| 08/05/2009 | CN201284634Y Fast connector for steel wire rope and rope socket |
| 07/29/2009 | CN101493000A Rotary jar |
| 07/23/2009 | US20090183878 Downhole tool |
| 07/22/2009 | CN201277001Y Guiding type interlocking connector |
| 07/21/2009 | US7562703 Annular flow shifting device |
| 07/15/2009 | CN201273161Y Fisher for impact drilling bit |
| 07/14/2009 | US7559361 Downhole force generator |
| 07/14/2009 | CA2469752C Method of screen or pipe expansion downhole without addition of pipe at the surface |
| 07/09/2009 | WO2009047708A3 Electrically activating a jarring tool |
| 07/07/2009 | US7556101 Downhole retrieving tool and method |
| 07/02/2009 | US20090166026 Jar device for use in coil tubing drilling |
| 07/01/2009 | CN201265384Y Magnetic end-finding device of drilling rod |
| 07/01/2009 | CN201265383Y Special salvaging tool for radioactive source |
| 07/01/2009 | CN100507205C Field adjustable impact jar |
| 06/24/2009 | CN101463716A Tubular article fishing device for deep mine |
| 06/24/2009 | CN101463715A Releasing device for drilling machine |
| 06/24/2009 | CN100504024C Wellbottom fishing grab |
| 06/18/2009 | WO2009073960A1 Staged actuation shear sub for use downhole |
| 06/18/2009 | US20090151951 Adjustable Diameter Fishing Tool |
| 06/17/2009 | CN201258712Y Four-tooth Salvaging barrel |
| 06/17/2009 | CN201258711Y Salvage cylinder with window |
| 06/17/2009 | CN201258710Y Junk salvaging skip |
| 06/16/2009 | CA2444005C Disconnect for use in a wellbore |
| 06/11/2009 | US20090146442 Sucker rod fishing tool |
| 06/11/2009 | US20090145604 System and Method for Retrieving a Well Tool from a Wellbore |
| 06/10/2009 | CN201254966Y Well-pipe unfreezing device for ravelly ground |
| 06/09/2009 | CA2645799A1 Staged actuation shear sub for use downhole |
| 05/27/2009 | CN201246127Y Multifunctional salvaging spear of glass fiber reinforced plastic pipe |
| 05/27/2009 | CN201246126Y Well falling rubber part salvaging machine |
| 05/27/2009 | CN201246104Y Recoverable slant machine and salvaging tool |
| 05/27/2009 | CN101440699A Commutation jet flow sand washing machine |
| 05/26/2009 | US7536942 Explosive pipe severing tool |
| 05/21/2009 | US20090126933 Device and method for retrieving debris from a well |
| 05/20/2009 | CN201241648Y Hydraulic ejector |
| 05/19/2009 | US7533724 Downhole intelligent impact jar and method for use |
| 05/14/2009 | US20090121507 Apparatus for gripping a down hole tubular for use in a drilling machine |
| 05/12/2009 | US7530766 Device and method for laying rigid tubular pipes |
| 05/12/2009 | US7530397 Explosive pipe severing tool |
| 05/12/2009 | CA2359236C Up-hole overshot and safety drilling apparatus |
| 05/07/2009 | US20090114398 Apparatus and Method for Gripping and/or Handling Tubulars |
| 04/29/2009 | CN201228531Y Hydraulic anchoring type reversing tool |
| 04/29/2009 | CN101418677A Clipped drill rod salvaging method and device for rock drilling machine |
| 04/28/2009 | US7523786 Apparatus and method for freeing deployment cables stuck in a wellbore |
| 04/23/2009 | CA2641321A1 Pipe grapple apparatus and method |
| 04/21/2009 | US7520341 Drill head assembly |
| 04/16/2009 | WO2009047708A2 Electrically activating a jarring tool |
| 04/15/2009 | CN101408095A Electrically activating a jarring tool |
| 04/08/2009 | CN201218069Y Screw thread slip type latch jack |
| 04/07/2009 | US7513303 Wellbore cleanup tool |
| 04/07/2009 | US7513300 Casing running and drilling system |
| 04/07/2009 | US7513299 Magnetic tool for retrieving metal objects from a well bore when using coil tubing |
| 04/07/2009 | CA2383370C Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 04/01/2009 | EP2041390A1 Mechanical trigger arrangement |
| 03/31/2009 | US7510008 Method and apparatus for decreasing drag force of trigger mechanism |
| 03/26/2009 | US20090078409 Method and Means for Providing Time Delay in Downhole Well Operations |
| 03/25/2009 | EP2038504A1 Selective agitation of downhole apparatus |
| 03/25/2009 | EP1756394A4 Spotting fluid for use with oil-based muds and method of use |
| 03/25/2009 | CN201212369Y Cone type hydraulic jar |
| 03/25/2009 | CN201212368Y Mechanical jar while drilling |
| 03/25/2009 | CN201212367Y Big stiffness compression spring jacket |
| 03/25/2009 | CN201212366Y Piston ring type hydraulic jar |
| 03/18/2009 | CN201209412Y Fishing tool special for sucker rod righting ring |
| 03/11/2009 | CN101382050A Hydraulic salvage method for door of bucket of rotary drill rig |
| 03/11/2009 | CN101382049A Salvage method for door of bucket of rotary drill rig |
| 03/05/2009 | WO2009029400A1 Combination motor casing and spear |
| 03/05/2009 | WO2009028953A1 Method and device for removing the upper portion of a well |
| 03/04/2009 | CN201202425Y Full hydraulic double-acting drill following bumper jar |
| 03/03/2009 | US7497260 Junk removal tool |
| 02/26/2009 | US20090050323 Method for Retaining Debris in a Perforating Apparatus |
| 02/25/2009 | CN201198746Y Drill pulling apparatus |
| 02/11/2009 | CN201193493Y Telescopic boring tool latch jack |
| 02/11/2009 | CN101363312A Removing method for drill head broken in drill by explosion |
| 02/10/2009 | US7487832 Force transfer apparatus to assist release of loaded member |
| 02/10/2009 | CA2432074C Downhole tool with electrical conductor |
| 01/29/2009 | US20090025941 Apparatus and Methods to Perform Operations in a Wellbore Using Downhole Tools Having Movable Sections |
| 01/29/2009 | US20090025928 Down hole tool with adjustable fluid viscosity |
| 01/28/2009 | CN201187289Y Water-pouring ball bar |
| 01/28/2009 | CN201187270Y Forced type spearhead-dragging positioning apparatus |
| 01/28/2009 | CN101353953A Apparatus for de-clamping loose formation well pipe |
| 01/27/2009 | CA2543762C Field adjustable impact jar |
| 01/25/2009 | CA2638252A1 Down hole tool with adjustable fluid viscosity |
| 01/22/2009 | WO2009012178A2 Method and apparatus for decreasing drag force of trigger mechanism |
| 01/22/2009 | US20090020287 Method and apparatus for decreasing drag force of trigger mechanism |
| 01/21/2009 | CN201184159Y Novel cable latch jack for fetching core with drill |
| 01/21/2009 | CN201184158Y Novel latch jack capable of self-freeing to fetch core with drill |
| 01/21/2009 | CN201184157Y Oil well hydraulic unfreezing machine |
| 01/20/2009 | US7478687 Coiled tubing conveyed milling |
| 01/20/2009 | CA2462983C Methods and apparatus to control downhole tools |
| 01/15/2009 | CA2692607A1 Multi-purpose well servicing apparatus |
| 01/07/2009 | CN101338658A Hermetic electric submersible pump production completion system capable of proceeding steel wire operation |
| 01/06/2009 | US7472745 Well cleanup tool with real time condition feedback to the surface |
| 12/31/2008 | WO2009002185A1 Magnet fixing device in a cleaning tool |
| 12/31/2008 | WO2009002181A1 Arrangement and method for separation of tool string |
| 12/31/2008 | WO2008107774A3 Methods and apparatus for borehole sensing including downhole tension sensing |
| 12/31/2008 | CN201173100Y Electric jar |