| Patents for E21B 40 - Tubing catchers, automatically arresting the fall of oil-well tubing (79) |
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| 08/14/2014 | US20140224470 Elevator Grip Assuance |
| 04/02/2014 | CN203515486U Device for blocking broken and falling oil well tubular column |
| 02/20/2014 | WO2013066990A3 Tubular catcher system and method |
| 12/04/2013 | CN203321446U Emergency oil pipe hanging tool for horizontal underwater Christmas tree |
| 08/21/2013 | EP2627861A1 A capture basket system for an underdeck pipehandling machine |
| 08/15/2013 | US20130206388 Capture basket system for an underdeck pipehandling machine |
| 07/31/2013 | CN101818639B Automatic control device of oil pipe clamping mechanism of non-well killing workover rig |
| 07/24/2012 | US8225862 Load distributing apparatus and method |
| 07/05/2012 | US20120168148 Flexible Collet Anchor Assembly with Compressive Load Transfer Feature |
| 07/03/2012 | US8210255 Boring head with new protection hood |
| 06/19/2012 | CA2651686C Apparatus and methods for utilizing a downhole deployment valve |
| 04/25/2012 | CN101307681B 油管坠底阻止器 Tubing fall bottom Blocker |
| 04/19/2012 | WO2012050458A1 A capture basket system for an underdeck pipehandling machine |
| 01/24/2012 | US8100186 Expansion system for expandable tubulars and method of expanding thereof |
| 12/29/2011 | US20110315392 Subsea apparatus |
| 09/29/2011 | US20110233017 Mouse hole damper device |
| 06/22/2011 | CN201874535U Anti-drop device for pipe string of oil-water well |
| 06/15/2011 | CN201865633U Hydraulic anchor |
| 06/15/2011 | CN201865131U Pipe grabber excavating device at drilling operation site |
| 01/05/2011 | CN201696000U Crane hanger of ocean platform |
| 09/01/2010 | CN101818639A Automatic control device of oil pipe clamping mechanism of non-well killing workover rig |
| 06/03/2010 | US20100132939 System and method for providing a downhole mechanical energy absorber |
| 05/26/2010 | CN201486493U Flexible claw mechanism |
| 11/11/2009 | CN201344003Y Pipe-grabbing mechanical arm |
| 10/22/2009 | US20090260797 Spooled Device Retaining System |
| 10/21/2009 | CN201330583Y Feed rod breaking non-skid device |
| 07/21/2009 | CA2497027C Apparatus and methods for utilizing a downhole deployment valve |
| 07/08/2009 | CN101476453A Hydraulic control method and hydraulic control loop for down-hole column clamping device |
| 04/22/2009 | CN201225133Y Machine for preventing oil conduit from dropping to bottom |
| 02/25/2009 | CN201198751Y Rod breaking catcher of oil pumping polished rod |
| 02/24/2009 | US7493950 Device for a long well tool |
| 11/19/2008 | CN101307681A Oil conduit falling preventer |
| 10/07/2008 | US7431080 Anchor device to relieve tension from the rope socket prior to perforating a well |
| 03/11/2008 | US7341979 Gelatin capsules containing oil field chemicals, preferably weighted with a heavy metal compound, are made more stable under certain conditions by the incorporation of a strong chelating agent. The microcapsules can provide an extended |
| 01/23/2008 | EP1880079A2 Pressure responsive centralizer |
| 11/29/2007 | WO2003097987A3 A device for a long well tool |
| 10/24/2007 | CN101059065A Tube-grasping device |
| 05/16/2007 | CN2900774Y Inertial oil pumping rod rotary anti-slip device |
| 05/10/2007 | WO2006114607A3 Pressure responsive centralizer |
| 02/20/2007 | US7178600 Apparatus and methods for utilizing a downhole deployment valve |
| 11/02/2006 | WO2006114607A2 Pressure responsive centralizer |
| 11/16/2005 | CN2740773Y Assembling device of hanging rope clamp |
| 10/06/2005 | US20050217846 Device for a long well tool |
| 10/05/2005 | CN2731068Y Drop-proof tool for electric pump set |
| 05/25/2005 | CN2702049Y Protector for preventing rod from breaking and dropping off in pumping well |
| 04/27/2005 | CN2695626Y Polish rod break and drop protecter |
| 12/16/2004 | US20040251032 Apparatus and methods for utilizing a downhole deployment valve |
| 11/16/2004 | US6817598 Gun brake device |
| 02/11/2004 | CN2603193Y Drop-proof slips for oil pipe |
| 01/22/2004 | US20040011533 Braking device for tool strings |
| 11/27/2003 | WO2003097987A2 A device for a long well tool |
| 09/03/2003 | CN2570451Y Oil pipe anchoring apparatus |
| 05/15/2003 | US20030089504 Gun brake device |
| 02/19/2003 | EP1283938A1 Braking device for tool strings |
| 10/23/2002 | CN2517869Y Rotatable tubing anchor |
| 12/19/2001 | CN2466345Y Oil pipe falling preventing device |
| 12/12/2001 | CN2464932Y Anchoring device for oil sucking pipe |
| 11/29/2001 | WO2001090530A1 Braking device for tool strings |
| 11/29/2001 | CA2409855A1 Braking device for tool strings |
| 11/14/2000 | US6145602 Downhole tool catcher and method |
| 02/09/2000 | CN2363052Y Hydraulic anchor for anti-precipitation |
| 10/13/1999 | CN2343336Y Back-off anti-stripping device for oil well sucker rod |
| 02/12/1997 | CN2247232Y hydraulic anchor for diameter 101.6 mm casing well |
| 10/16/1996 | CN2237717Y External shoulder hanger for tail tubing of petroleum casing |
| 06/12/1996 | CN2228975Y Seal moving tubing suspender |
| 12/07/1994 | CN2184779Y Multifunction hydraulic oil pipe anchor |
| 09/21/1994 | CN2177801Y Hydraulic anchor for diameter 168mm casing |
| 09/30/1993 | WO1993019279A1 Emergency catcher for a riser tensioning apparatus |
| 08/04/1993 | EP0554067A2 Geothermal wellhead having hanger spool with eccentric hanger seat |
| 07/28/1993 | CA2087462A1 Geothermal well apparatus and eccentric hanger spool therefor |
| 04/20/1993 | US5203409 Geothermal well apparatus and eccentric hanger spool therefor |
| 08/21/1991 | CN2083190U Underground blowout preventer |
| 02/06/1991 | CN2070817U Anti-tripping device for integral arbor oil pump rod |
| 01/30/1991 | CN2070355U Dropping-proof device for testing oil/water well |
| 01/24/1984 | US4427064 Wire line no-blow tool |
| 12/29/1981 | CA1115203A2 Coiled tubing apparatus |
| 08/18/1981 | US4284137 Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool |
| 05/08/1979 | CA1054139A1 Electrical kelly cock assembly |
| 11/02/1976 | US3989330 Electrical kelly cock assembly |