| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
|---|
| 06/29/1988 | EP0272770A2 Tubular connector |
| 06/28/1988 | US4753604 Means for sealing electrical conductor rods in a tubular housing |
| 06/28/1988 | US4753460 Tubular connection having two thread sets with multiple interengaging characteristics |
| 06/28/1988 | US4753291 Modular wireline tool connector with swivel coupling |
| 06/21/1988 | US4751967 Stage cementing apparatus |
| 06/21/1988 | US4751778 Method for restoring tubular upsets |
| 06/21/1988 | CA1238352A1 Oil well pipe joint |
| 06/15/1988 | EP0270952A2 Highly tough ERW steel pipe with distinguished sour resistance |
| 06/15/1988 | EP0270652A1 Pipe coupling connection sealing apparatus |
| 06/15/1988 | EP0149612B1 Tubular connection with cylindrical and tapered stepped threads |
| 06/15/1988 | CN87210007U Disengaging-proof guide for sucker rod |
| 06/14/1988 | US4750770 Device for connecting a drill column to a pipe or the like |
| 06/14/1988 | US4750761 Oilwell tubular connection |
| 06/14/1988 | US4750572 Drilling tool with an interchangeable conveying spiral |
| 06/14/1988 | US4750561 Gravel packing system for a production radial tube |
| 06/14/1988 | US4750560 Device for releasably connecting well tools |
| 06/14/1988 | CA1237907A1 Rod coupling for oil well sucker rods and the like |
| 06/07/1988 | US4749341 Method and system for supporting a well pump |
| 06/07/1988 | US4749051 Drill steel |
| 05/31/1988 | US4748059 Assembly for producing extrusion-clad tubular product |
| 05/25/1988 | EP0268306A2 Downhole tool body |
| 05/24/1988 | US4745983 Bit seat protector device for drilling systems or the like |
| 05/24/1988 | CA1237120A1 Double-taper slip-on drill string stabilizer |
| 05/18/1988 | CN87209340U Decomposition casing joint for oil well |
| 05/17/1988 | US4744438 Seismic probe more particularly usable in an untubed drilling shaft |
| 05/17/1988 | US4744426 Apparatus for reducing hydro-static pressure at the drill bit |
| 05/17/1988 | US4744420 For exacuating solids |
| 05/17/1988 | CA1236865A1 Latching connector |
| 05/17/1988 | CA1236825A1 Method and apparatus for selectively straight or directional drilling in subsurface rock formations |
| 05/11/1988 | CN86104625A The telecontrolled operating device |
| 05/10/1988 | CA1236502A1 Tubular connection having a chevron wedge thread |
| 05/10/1988 | CA1236501A1 Hostile environment tubular joint seal and method for installation |
| 05/05/1988 | WO1988003222A1 Apparatus for controlling the operation of a downhole tool |
| 05/04/1988 | CN87214932U Hinged water-through lifting joint |
| 05/03/1988 | US4741647 Guide tube for a flexible upright riser for marine petroleum exploitation |
| 05/03/1988 | US4741208 Pump differential pressure monitor system |
| 04/28/1988 | DE3734347A1 Bohrstange Drill rod |
| 04/27/1988 | EP0264969A2 Replaceable tool sections for a downhole tool |
| 04/27/1988 | EP0264657A1 Boring tool with an exchangeable delivery helix |
| 04/27/1988 | EP0264446A1 Joint for oil well pipes and method of manufacturing same |
| 04/27/1988 | EP0198896B1 Device for connecting a boring line with a tube or similar item |
| 04/26/1988 | US4740658 Pushing and pulling cable |
| 04/26/1988 | US4740107 Method and apparatus for protecting a shallow-water well |
| 04/26/1988 | US4740101 End fitting and coupling system for sucker rods |
| 04/26/1988 | US4739843 Apparatus for lateral drilling in oil and gas wells |
| 04/26/1988 | US4739842 Apparatus for optional straight or directional drilling underground formations |
| 04/26/1988 | CA1235686A1 Apparatus for optional straight or directional drilling underground formations |
| 04/19/1988 | US4739325 Apparatus and method for down-hole EM telemetry while drilling |
| 04/19/1988 | US4738812 Method of forming an electrode structure |
| 04/19/1988 | US4738312 Cable cutting coupling for drilling, production, well logging or other operations in wells |
| 04/13/1988 | EP0263772A2 Pump differential pressure monitor system |
| 04/13/1988 | EP0263671A2 Quick-locking connector |
| 04/12/1988 | US4736967 Tubular pin configuration to prevent galling while ensuring sealing |
| 04/12/1988 | US4736808 Percussive tool with high pressure fluid jet |
| 04/12/1988 | US4736805 Hydraulic breaker with high pressure water attachment |
| 04/12/1988 | US4736797 Jarring system and method for use with an electric line |
| 04/12/1988 | CA1235074A1 Soundproofing device for boring bar |
| 04/07/1988 | DE3632652A1 Apparatus for applying a wear-resistant deposit to highly stressed, metallic components |
| 04/07/1988 | DE3631686A1 Shaft structure for sanitary landfills |
| 04/06/1988 | EP0262822A2 Releasable connection for conduit string |
| 04/05/1988 | US4735444 Pipe coupling for well casing |
| 04/05/1988 | US4735267 Flexible production riser assembly and installation method |
| 03/30/1988 | EP0261291A1 Apparatus for shock protection in boreholes |
| 03/30/1988 | CN87106383A High bending strength ratio drill string components |
| 03/29/1988 | CA1234561A1 Profiled body roller-reamer stabilizer |
| 03/24/1988 | WO1988002056A1 High bending strength ratio drill string components |
| 03/23/1988 | EP0260878A2 Apparatus for disconnecting conduit string |
| 03/22/1988 | US4732416 Pipe connectors |
| 03/15/1988 | US4730857 Cylindrical threaded connection with uniform interference |
| 03/15/1988 | US4730677 Method and system for maintenance and servicing of subsea wells |
| 03/15/1988 | US4730671 Viscous oil recovery using high electrical conductive layers |
| 03/15/1988 | US4730670 High temperature packer for well conduits |
| 03/15/1988 | CA1234095A1 Flexible drill pipe |
| 03/10/1988 | WO1988001678A1 Method and apparatus for multi-stage cementing of a well casing |
| 03/10/1988 | WO1988001677A1 Process and device for producing drilling holes from an angled position in relation to the drilling axes |
| 03/08/1988 | US4730234 Pipe assembly module with internal electrical circuitry |
| 03/08/1988 | US4729694 TLP marine riser tensioner |
| 03/08/1988 | US4729438 Stabilizer for navigational drilling |
| 03/08/1988 | US4729158 Tool for aiding the assembly of drill stabilizer to the drill collar when up the bottom hole assembly |
| 03/08/1988 | CA1233855A1 Pipe connectors |
| 03/03/1988 | DE3628614A1 Sucker-rod guide |
| 03/02/1988 | EP0258115A1 Drill stem stabilizer |
| 03/02/1988 | EP0257943A2 Apparatus having a radially movable member |
| 03/02/1988 | EP0257744A2 Drilling system |
| 03/02/1988 | EP0257287A1 Pressure-sealed pipe joint for a driving pipe made of steel |
| 03/01/1988 | US4728296 Electrical adaptor for downhole submersible pump |
| 03/01/1988 | US4728224 Flexibility |
| 03/01/1988 | US4728129 Hydril-type connector |
| 03/01/1988 | US4728127 Pipe joint |
| 03/01/1988 | US4728124 Connection for drilling |
| 03/01/1988 | CA1233411A1 Casing suspension system |
| 03/01/1988 | CA1233366A1 Method and apparatus for isolating well pump units |
| 02/25/1988 | DE3628265A1 Stabiliser for drilling strings |
| 02/24/1988 | EP0256601A1 Method and device for making a hole in the ground |
| 02/24/1988 | EP0256177A1 Spar buoy construction having production and oil storage facilities and method of operation |
| 02/23/1988 | US4726425 Combination landing unit and seal assembly |
| 02/23/1988 | US4726423 Method for installing a blast joint |
| 02/23/1988 | US4726102 Pipe protector installation device |
| 02/23/1988 | CA1233164A1 Joint device in extension drill equipment for percussive drilling |
| 02/17/1988 | CN87207760U Double checked deadapter for oil discharging |