| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 02/10/1987 | US4641776 Segmented concentric centralizer |
| 02/10/1987 | US4641717 Connector housing |
| 02/10/1987 | US4641410 Method and apparatus for making a joint for steel tubes |
| 02/10/1987 | CA1217761A Method employed in deep hole drilling and a drill shaft system |
| 02/10/1987 | CA1217759A Drilling equipment |
| 02/10/1987 | CA1217733A Device and method to make at least one electrical connection between two points at either end of a pipe |
| 02/10/1987 | CA1217610A Fluid jet apparatus and method for cleaning tubular components |
| 02/04/1987 | EP0210771A1 Spiralling tapered slip-on drill string stabilizer |
| 02/04/1987 | EP0210758A2 Apparatus for cutting a drill collar |
| 02/04/1987 | CN86201517U 钻杆夹持器 Drill holder |
| 02/03/1987 | US4640815 Resistant interior cladding; powder metallurgy |
| 02/03/1987 | US4640814 Filling cavity with metal particles, then concureent heating and forging |
| 02/03/1987 | US4640647 Offshore well apparatus and method |
| 02/03/1987 | US4640353 Electrode well and method of completion |
| 02/03/1987 | US4640349 Flexible sucker rod unit |
| 02/03/1987 | CA1217472A1 Method and apparatus for controlling azimuthal drift of a drill bit |
| 01/27/1987 | USRE32336 Method and apparatus for conducting logging or perforating operations in a borehole |
| 01/27/1987 | US4638874 Drill adaptor |
| 01/27/1987 | US4638873 Direction and angle maintenance tool and method for adjusting and maintaining the angle of deviation of a directionally drilled borehole |
| 01/27/1987 | US4638862 Means and method for producing hydrocarbons from an earth formation during the RF retorting of a hydrocarbon stratum |
| 01/27/1987 | US4638860 Apparatus for blocking communication between well bore intervals |
| 01/27/1987 | CA1217231A1 Device for transmitting to the surface the signal from a transmitter located at a great depth |
| 01/24/1987 | CN85101442A Joint for steel tubes, its manufacturing process and a set of tool to carryout the process |
| 01/21/1987 | EP0209338A2 Apparatus for hydraulically releasing a tool string from a gravel screen |
| 01/21/1987 | EP0209318A2 Control of drilling courses in the drilling of bore holes |
| 01/21/1987 | EP0209217A2 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein |
| 01/21/1987 | CN86105695A Apparatus for cutting a drill collar |
| 01/20/1987 | US4637459 Anti rotational device for down hole hydraulic pumping unit |
| 01/20/1987 | CA1216871A1 Coupling for tubing or casing and method of assembly |
| 01/15/1987 | DE3524865A1 Coupling sleeve for pipes |
| 01/14/1987 | CN86104802A Compliant tower |
| 01/13/1987 | US4636727 Method and apparatus for detecting the location of defects in tubular sections moving past a well head |
| 01/13/1987 | US4636114 Buoyancy-supported struts for ocean platforms |
| 01/13/1987 | US4635968 Method and apparatus for protecting consecutive multiple variable diameter couplings |
| 01/13/1987 | US4635967 Internal seal for insulated steam injection casing assembly |
| 01/13/1987 | US4635736 Drill steering apparatus |
| 01/13/1987 | CA1216529A1 Tubular member thread protector |
| 01/07/1987 | CN85205530U Swivel coupling of square drilling pipes with radial clutch |
| 01/06/1987 | US4634314 Composite marine riser system |
| 01/06/1987 | US4633801 Stress reduction connection apparatus for cylindrical tethers |
| 01/06/1987 | CA1216107A1 Rods resistant to hydrosulfuric acid |
| 12/30/1986 | US4632603 Marine riser base system |
| 12/30/1986 | US4632468 Guide for well pump sucker rod |
| 12/30/1986 | US4632406 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| 12/30/1986 | US4632195 Roof drill system |
| 12/30/1986 | US4632183 Insertion drive system for tree savers |
| 12/30/1986 | EP0207068A2 Method for manufacturing non-magnetic drilling rods |
| 12/30/1986 | EP0206943A2 Fiber optic connector assembly |
| 12/30/1986 | EP0206917A1 Apparatus and method for the temporary protection of a workover or logging tool fastened to the end of a string |
| 12/30/1986 | EP0206909A1 Wire line cutting nipple for drilling, production, logging or performing operations in wells |
| 12/30/1986 | EP0205421A1 Oilwell tubing connector |
| 12/23/1986 | US4630849 Oil well pipe joint |
| 12/23/1986 | US4630809 Vibration isolator and shock absorber device |
| 12/23/1986 | US4630692 Applying to body a mixture of wear resistant metallic powder and binder, voltalizing binder, and pressurizing |
| 12/23/1986 | US4630690 Spiralling tapered slip-on drill string stabilizer |
| 12/23/1986 | CA1215551A1 Assembly of conductor guides for offshore drilling platform |
| 12/17/1986 | EP0201398A1 Composition for oriented drilling |
| 12/16/1986 | US4629991 Methods and apparatus for detecting tubular defects having a plurality of expandable arcuate segments |
| 12/16/1986 | US4629985 Method and apparatus for measuring defects in tubular members |
| 12/16/1986 | US4629225 Pipe joint for corrosion resistant alloys |
| 12/16/1986 | US4629224 Tubular connection |
| 12/16/1986 | US4629223 Pipe connector |
| 12/16/1986 | US4629222 Pipe connector |
| 12/16/1986 | US4629221 Pipe connectors |
| 12/16/1986 | US4629218 For providing fluid communication |
| 12/10/1986 | EP0204128A2 Plug-in connection for earth-drilling pipes |
| 12/10/1986 | EP0203919A1 An improved threaded pipe connection |
| 12/09/1986 | US4627502 Liquid-filled collar for tool string |
| 12/09/1986 | US4627490 Well bore barrier penetrator arrangement and method for multiple conductor pump power cable |
| 12/09/1986 | CA1215115A1 Device for automatically compensating the magnetism of drill rods |
| 12/03/1986 | EP0203074A1 Oilwell tubing connection. |
| 12/03/1986 | CN86100022A Details for percussion drill |
| 12/03/1986 | CN85104317A Coupling for oil well sucker rods and the like |
| 12/02/1986 | US4625815 Drilling equipment, especially for use in underground mining |
| 12/02/1986 | US4625814 Percussive drill rod system |
| 12/02/1986 | US4625381 Floating wear bushing retriever apparatus |
| 12/02/1986 | CA1214768A1 Hydraulic piston-effect method and apparatus for forming a bore hole |
| 11/26/1986 | EP0203003A1 Remotely-controlled assembling device for two items |
| 11/25/1986 | US4624488 Tubular connection |
| 11/25/1986 | US4624485 Insulating tubular conduit apparatus |
| 11/25/1986 | US4624484 Shrink-fit connector for electrical well subsurface heating processes |
| 11/25/1986 | US4624483 Quick connect coupler |
| 11/25/1986 | US4624318 Method and means for storing a marine riser |
| 11/25/1986 | US4624313 Well tool dislodgement apparatus |
| 11/25/1986 | US4624309 Apparatus for monitoring a parameter in a well |
| 11/25/1986 | US4624308 Sour gas cable head |
| 11/25/1986 | CA1214481A1 High pressure proof steel tube joint with low susceptibility to seizing |
| 11/20/1986 | WO1986006784A1 Well tool for use with down-hole drilling apparatus |
| 11/20/1986 | EP0202151A1 Apparatus for a drill pipe or the like, comprising a side entry SUB for a cable |
| 11/20/1986 | EP0202029A1 Buoy having minimal motion characteristics |
| 11/20/1986 | EP0201724A2 Replaceable conveying spiral for a drill bit |
| 11/20/1986 | EP0201723A2 Drilling tool with a replaceable conveying spiral |
| 11/18/1986 | US4623173 Screw joint coupling for oil pipes |
| 11/12/1986 | CN86103301A Well tool for use with down-hole drilling apparatus |
| 11/12/1986 | CA1213969A Method and device for making geophysical measurements within a wellbore |
| 11/12/1986 | CA1213838A Filament wound interlaminate tubular attachment and method of manufacture |
| 11/11/1986 | US4621838 Insert for insulated steam injection tubing |
| 11/11/1986 | US4621690 Sucker rod coupling |
| 11/11/1986 | US4621689 Cable suspended submergible pumping system with safety valve |
| 11/11/1986 | US4621655 Marine riser fill-up valve |