| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 01/31/1990 | EP0353180A2 Drill pipe |
| 01/31/1990 | EP0353152A1 Device for withdrawing dug material for making deep trenches |
| 01/31/1990 | EP0247125B1 Improvements in directional drilling of a drill string |
| 01/31/1990 | CN1039296A Apparatus for conveying liquid between bottom and surface of sea |
| 01/30/1990 | CA1265123A1 Mechanically actuated whipstock assembly |
| 01/30/1990 | CA1265122A1 Assembly enabling oriented drilling |
| 01/30/1990 | CA1264934A1 Curvature probe and method |
| 01/25/1990 | WO1990000666A1 Device for steering the direction of drilling |
| 01/25/1990 | DE3814939C1 Drilling device for directionally accurate drilling |
| 01/24/1990 | EP0352215A2 Drilling tool |
| 01/24/1990 | EP0352148A1 Device and method for performing measurements or interventions in a borehole |
| 01/24/1990 | CN1006571B Screw-thread joint of steel pipe with sealing means |
| 01/23/1990 | USRE33150 Borehole drill pipe continuous side entry or exit apparatus and method |
| 01/23/1990 | US4895205 Pipe washer and chemical applicator system |
| 01/23/1990 | CA1264784A1 Metal-to-metal wedge thread coupling connector |
| 01/23/1990 | CA1264783A1 Tubular connection having a parallel chevron thread |
| 01/23/1990 | CA1264528A1 Method and apparatus for joining pipe |
| 01/17/1990 | EP0350581A2 Elongate body |
| 01/17/1990 | CN2051279U Casinghead |
| 01/16/1990 | US4894043 Torque transmitting coupler with shear capability and component separation containment |
| 01/16/1990 | US4893844 Tubular coupling with ventable seal |
| 01/16/1990 | US4893658 FRP pipe with threaded ends |
| 01/16/1990 | CA1264439A1 Production riser weight compensation device by means of floating bodies |
| 01/09/1990 | US4892337 Fatigue-resistant threaded connector |
| 01/09/1990 | US4892161 Rotary rock drilling machine |
| 01/09/1990 | CA1264291A1 Latching production seal assembly |
| 01/03/1990 | EP0349267A1 Apparatus for tensioning a riser |
| 01/03/1990 | CN2050468U Laying and drawing huide arrangement for two-stories drilling stem in the derrick |
| 12/27/1989 | EP0347601A1 Drilling tool with a conveying spiral |
| 12/26/1989 | US4889185 Blast joint |
| 12/20/1989 | EP0346961A2 Method and apparatus for placing a cement lining in a borehole |
| 12/14/1989 | WO1989012156A1 Method for improving drill cuttings transport from a wellbore |
| 12/14/1989 | DE3913974A1 Arrangement for the releasable connection of two bodies, in particular tie-rod connection |
| 12/13/1989 | EP0346229A1 Mounting device for a tool especially suited for intervening at the end of a drill string |
| 12/12/1989 | US4886130 Nutational technique for limiting well bore deviation |
| 12/12/1989 | US4886121 Universal flexbowl wellhead and well completion method |
| 12/12/1989 | US4886113 Positive indication shear ring |
| 12/06/1989 | EP0344322A1 Method of monitoring the state of an extended shell |
| 12/06/1989 | EP0344217A1 Connections for tubes made of composite materials. |
| 12/06/1989 | CN2048893U Anti-tripping oil suction rod |
| 12/05/1989 | US4884632 Side entry sub well logging apparatus and method |
| 11/28/1989 | US4884071 Wellbore tool with hall effect coupling |
| 11/28/1989 | US4883387 Apparatus for tensioning a riser |
| 11/22/1989 | CN2048106U Supporter for turbine drilling tool |
| 11/21/1989 | US4881605 Stabilizing and drilling apparatus and method |
| 11/16/1989 | WO1989011056A1 Tubing collar |
| 11/15/1989 | CN2047711U Fixing device for drilling rods |
| 11/14/1989 | US4880067 Apparatus for drilling a curved borehole |
| 11/14/1989 | US4880066 Assembly for directional drilling of boreholes |
| 11/09/1989 | DE3907637A1 Rodless drilling, pressure or cleaning implement |
| 11/09/1989 | DE3814788A1 Drill rod |
| 11/09/1989 | DE3814365A1 Coupling, in particular for diamond bit with shank pipe and pipe thread connection |
| 11/08/1989 | EP0340658A2 Activatable seal for pipes to be driven in the ground |
| 11/08/1989 | EP0340280A1 Self-propelled subsoil penetrating tool system |
| 11/08/1989 | CN2047298U Under-ground blocking preventive by-passs circulating joint |
| 11/08/1989 | CN2047297U Flexible continuous oil-extracting rod |
| 11/07/1989 | US4878285 Method of assembling coupling to tubing or casting |
| 11/07/1989 | CA1262641A1 Fatigue resistant coupling for tubular members |
| 11/02/1989 | EP0340187A1 Drill string element |
| 11/02/1989 | DE3813472A1 Coupling, in particular for diamond bit with shank pipe and pipe thread connection |
| 11/02/1989 | DE3812211A1 Screw-connections for riser pipes for pumps in wells |
| 11/01/1989 | CN2046920U Gas lift counter-circulating simple drill |
| 11/01/1989 | CN2046919U Rotational flow righting instrument for casing pipe |
| 11/01/1989 | CN1036811A Drill |
| 10/31/1989 | US4877095 Stopper for cable passages or conduits |
| 10/31/1989 | US4877092 Near bit offset stabilizer |
| 10/31/1989 | US4877091 Augering apparatus and drilling rig |
| 10/31/1989 | US4877089 Method and apparatus for coupling wireline tools to coil tubing |
| 10/31/1989 | US4877088 Process and equipment for oil well drilling and completing operations in deep water |
| 10/25/1989 | EP0338079A1 Method and device for controlling the condition of a lengthy construction element |
| 10/25/1989 | CN2046538U Protective connecting hoop for ball type sucker rod |
| 10/25/1989 | CN1036622A Elliptical thread design |
| 10/24/1989 | US4875713 Internally coated tubular system |
| 10/24/1989 | US4875524 Casing centralizer |
| 10/17/1989 | US4874327 Universal cable head for a multiconductor logging cable |
| 10/17/1989 | US4874045 Straight hole drilling method and assembly |
| 10/11/1989 | EP0336010A1 Percussion drill with interchangeable downhole or sideways discharging cutting or drilling head |
| 10/10/1989 | US4873488 Induction logging sonde with metallic support having a coaxial insulating sleeve member |
| 10/10/1989 | US4872519 Drill string drill collars |
| 10/10/1989 | US4872515 Drill rod for percussion drilling |
| 10/10/1989 | US4872509 Oil well production system using a hollow tube liner |
| 10/10/1989 | US4872253 Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing |
| 10/10/1989 | CA1262233A1 Combination landing unit and seal assembly |
| 10/04/1989 | EP0335059A1 Set of telescopic boring rods with automatic coupling racks designed to transmit axial forces in both directions and with blocking elements of contiguous rods |
| 10/03/1989 | US4871194 Oil well pipe joint and manufacturing method therefor |
| 10/03/1989 | US4871020 Sucker rod centralizer |
| 09/27/1989 | CN1035864A Flexible hydraulic drilling tool |
| 09/26/1989 | US4869323 Cementing and rotating an upper well casing attached by swivel to a lower casing |
| 09/26/1989 | CA1261817A1 Earth drilling method and apparatus using multiple hydraulic forces |
| 09/26/1989 | CA1261316A1 Drill bit |
| 09/26/1989 | CA1260324A1 Corrosion protection for mooring and riser elements of a tension leg platform |
| 09/26/1989 | CA1259906A1 Method and apparatus for hydraulically releasing from a gravel screen |
| 09/21/1989 | WO1989008769A1 Drill |
| 09/21/1989 | WO1989006330A3 Tubular connection having a variable metal-to-metal seal width |
| 09/20/1989 | EP0333532A1 Pipe made of composite materials having low sensibility for stretch changes due to internal pressure |
| 09/20/1989 | EP0333450A1 Downhole Stabilisers |
| 09/20/1989 | CN2044638U Underground circulation connector |
| 09/13/1989 | EP0331978A2 Drill pipe for a hydraulic down-hole drill hammer |
| 09/13/1989 | CN1035557A Method of monitoring state of elongated object and apparatus for performing this method |
| 09/12/1989 | US4866214 Service cable for a subsoil penetrating tool and method of preventing rotation of the cable when in use |