| Patents for E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619) |
|---|
| 11/07/1989 | US4878546 Self-aligning top drive |
| 10/31/1989 | US4877091 Augering apparatus and drilling rig |
| 10/11/1989 | EP0144425B1 Vertical hole-boring machine |
| 09/05/1989 | US4862973 Drilling derrick device |
| 08/22/1989 | US4858700 Articulated apparatus for positioning rock drills |
| 08/09/1989 | CN1004975B Bearing structure and floating vessel comprising such structure |
| 08/08/1989 | US4854778 Caisson tower platform and method of setting same |
| 08/08/1989 | US4854400 Well drilling |
| 07/27/1989 | WO1989006741A1 Apparatus for forming slit in base rock and concrete surface |
| 07/19/1989 | EP0324217A1 Safety system and method |
| 07/18/1989 | US4848966 Arrangement in a production platform |
| 07/05/1989 | CN2040530U Ternover bracket drilling derricek base |
| 06/22/1989 | DE3827865C1 Roof-bolt drilling apparatus movable on support sections forming running rails |
| 06/13/1989 | US4837992 Folded/telescoped drill rig mast for limited space platform |
| 05/23/1989 | US4831795 Drilling derrick assembly |
| 05/16/1989 | US4830336 Arrangement in a hoisting device, especially for a derrick |
| 05/16/1989 | US4830119 Top head drive cooling system |
| 04/25/1989 | US4823870 Cantilever drilling structure |
| 04/19/1989 | EP0312286A2 Folded/telescoped drill rig mast for limited space platform |
| 04/18/1989 | US4821816 Method of assembling a modular drilling machine |
| 03/15/1989 | CN1031741A Lifting apparatus for drilling |
| 03/08/1989 | EP0306145A1 Caisson tower platform and method of setting same |
| 03/07/1989 | US4809788 Mast assembly for percussive and auger drilling |
| 02/08/1989 | EP0302269A1 Slant service rig |
| 01/24/1989 | US4799556 Drilling boom |
| 01/17/1989 | CA1248937A1 Rock drill with tunnel profile control system |
| 11/29/1988 | CA1245622A1 Feed beam for a rock drill |
| 11/22/1988 | US4785892 Pile driver, pile drawer and/or drilling machine |
| 11/16/1988 | CN87211947U Derrick substructure for drilling deep well |
| 11/15/1988 | CA1244856A1 Robot arm |
| 10/25/1988 | CA1243664A1 Top head drive well drilling apparatus with stabbing guide |
| 07/26/1988 | US4759414 Modular drilling machine and components thereof |
| 07/19/1988 | US4757592 Method of erecting a portable drilling rig |
| 07/12/1988 | US4756366 Well servicing methods using a hydraulic actuated workover mast |
| 07/07/1988 | DE3642694A1 Drilling rig |
| 06/29/1988 | EP0272850A2 Apparatus for racking and handling drilling tubulars between a horizontal and a vertical position |
| 06/29/1988 | CN86108443A Spatially-adjustable support of a workover rig and derrick |
| 06/28/1988 | US4753553 Bearing structure and a floating vessel comprising such structure |
| 06/28/1988 | US4753300 Hydraulic top drive for wells |
| 06/08/1988 | EP0270458A1 Ground drilling device working along a substantially horizontal axis |
| 06/08/1988 | EP0269669A1 Arrangement in a hoisting device, especially for a derrick |
| 05/17/1988 | US4744710 Drilling derrick with external pipe storage |
| 05/17/1988 | CA1236826A1 Drilling boom |
| 03/15/1988 | USRE32623 Curved offshore well conductors |
| 03/09/1988 | EP0258705A2 Device for handling and setting drill pipes in a derrick |
| 03/09/1988 | CN86209391U Movable mast |
| 02/23/1988 | US4727447 Safety system and method |
| 02/23/1988 | CA1233167A1 Supporting arrangement for a feed device for a rock drilling machine |
| 02/16/1988 | CA1232898A1 Slant service rig |
| 01/26/1988 | CA1231937A1 Derrick for drilling |
| 12/17/1987 | WO1987007673A1 Arrangement in a hoisting device, especially for a derrick |
| 12/15/1987 | US4712624 Rock drill with tunnel profile control system |
| 11/03/1987 | US4703811 Drilling and/or lifting machine |
| 10/28/1987 | EP0243210A2 Modular drilling machine and components thereof |
| 10/06/1987 | US4698570 Boom positioning apparatus for rock drill |
| 10/06/1987 | CA1227787A1 Method and equipment for rock drilling |
| 10/03/1987 | CN86200995U Petroleum derrick consisting of case-shaped components made of plate-steel |
| 09/22/1987 | US4695040 Erecting rig for a well pump |
| 09/22/1987 | CA1227127A1 Erecting rig for a well pump |
| 08/18/1987 | US4687401 Pipe positioner |
| 08/04/1987 | US4684306 Auxiliary workover rig |
| 07/28/1987 | US4682899 Feed beam for a rock drill |
| 07/14/1987 | US4679489 Automatic leveling system for blast hole drills and the like |
| 07/14/1987 | CA1224205A1 Pressurized medium actuated gripping device |
| 06/30/1987 | US4676322 Supporting arrangement for a feed device for a rock drilling machine |
| 06/16/1987 | CA1223003A1 Well drilling apparatus |
| 06/11/1987 | DE3543321A1 Deep-drilling plant |
| 06/10/1987 | CN86206997U Apparatus for setting up derrick of oil extraction |
| 05/27/1987 | EP0223575A2 Drilling apparatus |
| 04/21/1987 | US4658903 Method for handling wellhead assembly |
| 04/15/1987 | CN85107344A Method for providing a tubular node in a frame-type truss strueture such as off-shore platforms for oil drilling and production |
| 04/01/1987 | EP0215998A2 A pile driver, pile drawer and/or drilling machine |
| 03/17/1987 | US4650011 Method and apparatus for drilling a hole in an ice formations and pumping water out from such hole |
| 03/17/1987 | CA1219253A1 In-the-hole drill |
| 02/24/1987 | US4645084 Robot arm |
| 02/17/1987 | US4643262 Pressurized medium actuated gripping device |
| 02/10/1987 | US4641716 Method and equipment for rock drilling |
| 02/04/1987 | CN86104630A Bearing structure and a floating vessel comprising such structure |
| 02/03/1987 | CA1217474A1 Angle drilling apparatus |
| 02/03/1987 | CA1217473A1 Method of and arrangement for positioning of a drilling apparatus |
| 01/27/1987 | US4639868 Control method for drilling apparatus which makes use of a final drilling pattern transformed from primary and secondary patterns |
| 01/27/1987 | US4638871 Earth drill rig |
| 01/20/1987 | US4637475 In-the-hole drill |
| 01/20/1987 | CA1216729A1 Self-elevating substructure for a portable oil derrick |
| 01/14/1987 | CN86104802A Compliant tower |
| 01/07/1987 | EP0207915A1 A bearing structure and a floating vessel comprising such structure |
| 12/23/1986 | US4630425 Erection means for portable drilling system |
| 12/16/1986 | US4629014 For drilling and maintenance of oil and/or gas wells |
| 12/02/1986 | US4625805 Oil production installation for a subsea station of modular design |
| 10/22/1986 | CN85204286U Safety cylinder for well-repairing machine with lifting derrick |
| 10/14/1986 | US4616454 Slant service rig |
| 09/24/1986 | CN86100511A Slant service rig |
| 09/16/1986 | US4611952 Method of fabricating the lines of a taut-line platform and of prepositioning them prior to final fixing |
| 08/27/1986 | EP0192452A1 Slant service rig |
| 08/27/1986 | EP0192253A1 Boom assembly |
| 08/19/1986 | US4606155 Angle drilling apparatus |
| 07/29/1986 | US4602894 Combination offshore drilling rig |
| 07/15/1986 | US4601000 Electrohydraulic control system for a rockdrill assembly |
| 07/08/1986 | CA1207122A1 Delayed deployment platform |
| 06/17/1986 | US4595065 Shaft drilling rig |