| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 11/18/1986 | US4623026 Method and apparatus of a self-aligning sleeve for the correction of the direction of deviated boreholes |
| 11/18/1986 | US4623025 Soil-displacement drill and method for manufacturing a pile |
| 11/12/1986 | CN86103301A Well tool for use with down-hole drilling apparatus |
| 11/12/1986 | CA1213879A Drifting equipment |
| 11/11/1986 | US4621698 Percussion boring tool |
| 11/11/1986 | US4621691 Well drilling |
| 11/11/1986 | US4621655 Marine riser fill-up valve |
| 11/04/1986 | US4620600 Drill arrangement |
| 10/29/1986 | EP0198896A1 Device for connecting a boring line with a tube or similar item. |
| 10/28/1986 | US4619335 Enhanced circulation drill bit |
| 10/28/1986 | CA1213268A1 Apparatus for directional drilling of subterranean wells |
| 10/21/1986 | USRE32267 Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
| 10/21/1986 | US4618008 Vertical drilling method and apparatus |
| 10/21/1986 | CA1212898A1 Process and installation for in-situ gasification of coal |
| 10/15/1986 | EP0197456A2 A process and apparatus to move and form underground passages in soil |
| 10/15/1986 | CN85202671U Variable-angle elbow connection |
| 10/14/1986 | US4616720 Divided-bucket type rotary excavator |
| 10/14/1986 | US4616719 For overcoming a resistance to advance of a pipe string in a well bore |
| 10/14/1986 | US4616454 Slant service rig |
| 10/08/1986 | EP0197019A1 Drill bit |
| 10/08/1986 | EP0196848A1 Cavitating jet device |
| 10/07/1986 | US4615400 Sonic drilling system employing spherical drill bit |
| 10/01/1986 | EP0195840A1 Offshore structure incorporating a conductor deflecting system |
| 10/01/1986 | CN86102239A Drill bit |
| 09/30/1986 | CA1212100A2 Method of installing, levelling and securing a subsea template |
| 09/30/1986 | CA1212099A2 Method of installing one or more subsea templates |
| 09/30/1986 | CA1212098A1 Down-hole motor and method for directional drilling of boreholes |
| 09/24/1986 | EP0195559A1 Method and apparatus for installment of underground utilities |
| 09/24/1986 | EP0195265A1 Tool for undercutting bore holes |
| 09/24/1986 | EP0195042A1 Lining underground ducts |
| 09/24/1986 | CN86100511A Slant service rig |
| 09/23/1986 | US4612987 For absorbing reaction torque from a downhole mud motor |
| 09/16/1986 | US4611950 Method and apparatus for removing contaminants from soil |
| 09/12/1986 | WO1986005231A1 Marine riser fill-up valve |
| 09/10/1986 | EP0194039A1 Manipulative device |
| 09/09/1986 | US4610434 Safety arrangement in gas-cutting lances |
| 09/09/1986 | US4610321 Cavitating jet device |
| 09/09/1986 | US4610317 Spherical bit |
| 09/09/1986 | US4610307 Method and apparatus for selectively straight or directional drilling in subsurface rock formation |
| 08/28/1986 | WO1986004951A1 Drilling pipe for making a drill string |
| 08/28/1986 | WO1986004950A1 Drilling pipe for making a drill string |
| 08/27/1986 | EP0192452A1 Slant service rig |
| 08/27/1986 | EP0192253A1 Boom assembly |
| 08/27/1986 | CN86101283A Manipulative device |
| 08/26/1986 | US4607792 Oscillating pulsed jet generator |
| 08/26/1986 | CA1210414A1 Enhancing liquid jet erosion |
| 08/26/1986 | CA1210385A1 Adjustable length drilling sub |
| 08/26/1986 | CA1210321A1 Detachable apparatus for preventing differential pressure sticking in wells |
| 08/26/1986 | CA1210319A1 Geotechnical cone lubrication apparatus and method |
| 08/20/1986 | EP0191016A1 Portable apparatus for and method of pole reinforcement |
| 08/19/1986 | US4606417 Pressure equalized stabilizer apparatus for drill string |
| 08/19/1986 | US4606155 Angle drilling apparatus |
| 08/14/1986 | WO1986004537A1 Manipulative device |
| 08/13/1986 | EP0190933A2 Pipe replacement |
| 08/13/1986 | EP0190669A2 Drilling apparatus |
| 08/13/1986 | EP0190529A1 Remotely controlled flow-responsive actuating device, in particular for actuating a stabilizer in a drill string |
| 08/13/1986 | EP0190502A1 Mains bursting tool |
| 08/12/1986 | US4605076 Method for forming boreholes |
| 08/12/1986 | US4604961 Vessel mooring system |
| 08/12/1986 | US4604818 Under reaming pile bore excavating bucket and method of its excavation |
| 08/12/1986 | CA1209356A1 Method and apparatus for replacing buried pipe |
| 08/05/1986 | US4603748 High frequency vibratory systems for earth boring |
| 07/23/1986 | EP0188266A2 Underground pipe element pushing device |
| 07/23/1986 | EP0188190A2 A drilling and/or lifting machine |
| 07/23/1986 | EP0187736A1 A drilling machine to be coupled to an excavator. |
| 07/23/1986 | CN85108426A Reversible underground piercing device |
| 07/22/1986 | US4601353 Method for drilling drainholes within producing zone |
| 07/16/1986 | EP0187637A2 A rotary head |
| 07/15/1986 | US4601000 Electrohydraulic control system for a rockdrill assembly |
| 07/15/1986 | US4600508 Contamination removal system |
| 07/15/1986 | US4600061 In-shaft drilling method for recovery of gas from subterranean formations |
| 07/09/1986 | EP0186952A1 Method for drilling deviated wellbores |
| 07/08/1986 | CA1207156A1 Self-anchoring fence post and method of installing same |
| 07/02/1986 | EP0186317A1 Casing high angle wellbores |
| 07/02/1986 | EP0185739A1 Controllable downhole directional drilling tool |
| 07/02/1986 | CN85108190A Rotary head for drilling machine |
| 07/01/1986 | US4597563 Tool holder for thermic cutting rods |
| 07/01/1986 | US4597454 Tool for drilling in a deep bore well |
| 06/24/1986 | US4596494 Device for positioning and applying tension to a set of rods for holding a partially submerged platform |
| 06/24/1986 | US4596294 Surface control bent sub for directional drilling of petroleum wells |
| 06/24/1986 | US4596293 Targetable drill with pressure telemetering of drill parameters |
| 06/17/1986 | US4595065 Shaft drilling rig |
| 06/17/1986 | US4595059 Method of providing a conductor pipe to an opening portion of a well |
| 06/17/1986 | US4594885 Projectile-propelling apparatus |
| 06/11/1986 | EP0184304A1 Method and system of drilling deviated wellbores |
| 06/11/1986 | EP0183899A1 Boring tool with radially oscillating/percussive and driven/rotating rollers |
| 06/10/1986 | US4593772 Rotary cutter for cable following apparatus |
| 06/10/1986 | CA1205796A1 Down-hole motor and method for directional drilling of boreholes |
| 06/10/1986 | CA1205740A1 Marine riser tensioner |
| 06/05/1986 | WO1986003253A1 A method for establishing a connection from the sea bed to a tunnel positioned below |
| 06/03/1986 | US4592432 Automatically operated boring head |
| 05/28/1986 | EP0182551A2 Mole |
| 05/27/1986 | US4591295 Curved conductor well template |
| 05/27/1986 | US4590720 Telescoping derrick |
| 05/22/1986 | WO1986001846A3 Lining underground ducts |
| 05/21/1986 | EP0181712A1 Reversible underground piercing device |
| 05/20/1986 | US4589802 Slip assembly for subsea template |
| 05/20/1986 | US4589502 Earth boring apparatus |
| 05/20/1986 | US4589499 Horizontal drilling apparatus |
| 05/10/1986 | CN85108013A Apparatus and method for driving casing or conductor pipe |