| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
|---|
| 07/01/2004 | US20040123986 Removal of tubulars from wells |
| 06/30/2004 | EP1432886A1 Disconnect for use in a wellbore |
| 06/22/2004 | US6752569 Underwater tool |
| 06/16/2004 | EP1169406B1 Method of releasing stuck pipe or tools and spotting fluids therefor |
| 06/10/2004 | US20040108739 Whipstock retrieving overshot |
| 06/10/2004 | US20040108108 Methods and apparatus to control downhole tools |
| 06/09/2004 | CN2620078Y High-pressure fishing sealer |
| 06/08/2004 | US6745836 Down hole motor assembly and associated method for providing radial energy |
| 06/03/2004 | US20040104023 Double-cone device and pump |
| 05/26/2004 | EP1301683B1 Underwater tool |
| 05/19/2004 | CN1498303A Double-cone device and pump. |
| 05/18/2004 | US6736209 Method for vibrational impact on a pipe string in a borehole and devices for carrying out said method |
| 05/12/2004 | CN2615327Y Hydraulic jet pump core fishing spear |
| 05/12/2004 | CN2615326Y Assembling sucker rod overshot |
| 05/11/2004 | US6732822 Method and apparatus for handling tubular goods |
| 05/06/2004 | US20040084191 Internal coiled tubing connector |
| 05/04/2004 | US6729419 Electro-mechanical drilling jar |
| 05/04/2004 | US6729407 Method for removing gravel pack screens |
| 04/28/2004 | EP1412616A1 Dual sensor freepoint tool |
| 04/27/2004 | US6725932 Down hole jar tool |
| 04/27/2004 | US6725923 Method and device for exciting transversal oscillations of a pipe string in a borehole |
| 04/27/2004 | CA2161331C Reduced waiting time hydraulic drilling jar |
| 04/15/2004 | US20040072697 Water-in-oil emulsion of isobutyl oleate as its external phase and glycerin as the internal phase for freeing differential stuck pipe in a subterranean well drilling operation |
| 04/14/2004 | CN2611580Y Self-locking reverse buckling salvage of sucker rod |
| 04/14/2004 | CN2611579Y Hydraulic salvage for oil/gas well and shell cutting kit |
| 04/13/2004 | US6719052 Latch mechanism guide |
| 04/13/2004 | CA2300086C Method and apparatus for engaging an object |
| 04/08/2004 | WO2004029407A1 Latch mechanism guide |
| 04/07/2004 | CN2610072Y One-wheel fisher |
| 04/07/2004 | CN2610071Y Quick grappling tool |
| 04/01/2004 | US20040060701 Latch mechanism guide |
| 03/30/2004 | US6712134 Modular bi-directional hydraulic jar with rotating capability |
| 03/30/2004 | CA2335910C Tubular injector with snubbing jack and oscillator |
| 03/25/2004 | WO2004025073A1 Method for removing gravel pack screens |
| 03/25/2004 | US20040055744 Method and apparatus to vibrate a downhole component |
| 03/18/2004 | DE10241610A1 System for connecting a pipe designed to be pulled into the ground to a pulling device comprises a connecting element, and fixing elements movably arranged relative to each other |
| 03/17/2004 | CN2606788Y Slip socket capable of sleeve milling |
| 03/17/2004 | CN2606787Y Strong magnet fisher |
| 03/11/2004 | US20040045716 Hydraulic jar device |
| 03/11/2004 | US20040045715 Method for removing gravel pack screens |
| 03/09/2004 | CA2301963C Method and apparatus for handling tubular goods |
| 03/04/2004 | WO2004018925A1 Assembly system for pipe insertion |
| 03/04/2004 | WO2004018831A1 A spearhead assembly |
| 03/04/2004 | US20040041423 Clamp and method for handling objects |
| 03/04/2004 | CA2496425A1 A spearhead assembly |
| 03/03/2004 | EP0900320B1 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 02/24/2004 | CA2264360C Downhole tool catcher |
| 02/19/2004 | US20040031604 Expandable wirefinder and method for use of same |
| 02/17/2004 | US6691778 Methods of performing downhole operations using orbital vibrator energy sources |
| 02/11/2004 | CN2603191Y Fishing tool |
| 02/04/2004 | EP0928361B1 Safety joint |
| 01/29/2004 | WO2003100215A3 Mitigation of proppant sticking in removing downhole tools |
| 01/27/2004 | US6681858 Packer retriever |
| 01/22/2004 | US20040011564 Method and device to free stuck objects |
| 01/22/2004 | US20040011530 Long stroking tool |
| 01/15/2004 | WO2004005669A1 Corrugated downhole tubulars |
| 01/15/2004 | WO2004005668A1 Downhole drill string having a collapsible subassembly |
| 01/15/2004 | CA2492746A1 Downhole drill string having a collapsible subassembly |
| 01/13/2004 | US6675909 Hydraulic jar |
| 01/08/2004 | US20040003923 Method and apparatus for retrieving equipment from a well |
| 01/02/2004 | EP1373676A1 An apparatus for retrieving metal debris from a well bore |
| 12/25/2003 | US20030234121 Down hole jar tool |
| 12/17/2003 | CN2592850Y Drilling pile bit overshot |
| 12/16/2003 | US6662871 Spotting fluid for differential sticking |
| 12/10/2003 | CN2591217Y Fishing spear for grapping tube shape fallen objects in well |
| 12/10/2003 | CN2591216Y Over shot for gripping rod shape falling objects in well |
| 12/04/2003 | WO2003100215A2 Mitigation of proppant sticking in removing downhole tools |
| 12/03/2003 | EP1208283B1 Hydraulic jar |
| 12/02/2003 | US6655462 Magnetic well cleaning apparatus |
| 12/02/2003 | US6655460 Methods and apparatus to control downhole tools |
| 12/02/2003 | CA2093404C Rock drilling device |
| 11/27/2003 | US20030217846 Mitigation of proppant sticking in removing downhole tools |
| 11/25/2003 | US6651747 Downhole anchoring tools conveyed by non-rigid carriers |
| 11/20/2003 | WO2003095793A1 Method of screen or pipe expansion downhole without addition of pipe at the surface |
| 11/13/2003 | WO2003093624A2 Packer retriever |
| 11/13/2003 | US20030209352 Method of screen or pipe expansion downhole without addition of pipe at the surface |
| 11/13/2003 | US20030209351 Down hole motor |
| 11/13/2003 | US20030209349 Flow-activated valve |
| 11/06/2003 | US20030205377 Packer retriever |
| 11/05/2003 | CN2584808Y Fishing spear for underground work |
| 11/04/2003 | US6640899 Apparatus and methods for jarring |
| 10/29/2003 | EP1356009A2 Spotting fluid for differential sticking |
| 10/29/2003 | CN2583351Y Overshot for underground job |
| 10/21/2003 | CA2088288C Drill string jarring and bumping tool |
| 10/15/2003 | CN2580099Y Underwell tubular steel wire fisher |
| 10/15/2003 | CN2580096Y Underwell hydraulic pulling releasing device |
| 10/09/2003 | WO2003083252A1 Portable pump rod puller |
| 10/09/2003 | US20030188869 Flapper valve for single trip retrieval of packer tools |
| 10/08/2003 | CN2578514Y Soft substance fishing gear in oil well |
| 10/07/2003 | US6629562 Downhole fishing tool for retrieving metallic debris from a borehole |
| 10/01/2003 | EP1348063A1 Hydraulic jar device |
| 10/01/2003 | EP1102913B1 Downhole tension swivel sub |
| 09/25/2003 | WO2003078942A2 Radioactive bullet retrieval |
| 09/24/2003 | EP1025337B1 Method and apparatus for engaging an object |
| 09/23/2003 | CA2113458C Double-acting accelerator for use with hydraulic drilling jars |
| 09/18/2003 | US20030173084 Downhole fishing tool for retrieving metallic debris from a borehole |
| 09/11/2003 | US20030168227 Drop in dart activated downhole vibration tool |
| 09/11/2003 | US20030168212 Method for vibrational impact on a pipe string in a borehole and devices for carrying out said method |
| 09/09/2003 | US6615919 Well pipe extraction apparatus |
| 09/03/2003 | CN2570447Y Open-window type pumping rod dipper |