| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/04/1986 | US4573714 Marine riser coupling assembly |
| 03/04/1986 | US4573540 Method for drilling deviated wellbores |
| 03/04/1986 | CA1201380A1 Well pump shield |
| 03/04/1986 | CA1201379A1 Ball actuated releasable coupling |
| 02/27/1986 | WO1986001252A1 Well pipe joint |
| 02/25/1986 | US4572589 Journal bearing |
| 02/25/1986 | US4572305 Drilling apparatus |
| 02/25/1986 | CA1201060A1 Riser support system |
| 02/18/1986 | US4571215 Vibration dampener apparatus |
| 02/18/1986 | US4571162 Oil well sucker rod shock absorber |
| 02/18/1986 | US4570982 Tubular joint with trapped mid-joint metal-to-metal seal |
| 02/18/1986 | US4570716 System and apparatus of liason between an underwater wellhead and a surface support |
| 02/18/1986 | US4570708 High strength steel pipes |
| 02/18/1986 | US4570705 Sheave drive assembly for flexible production tubing |
| 02/12/1986 | EP0171335A1 Drilling rod joint, especially for traversing the zones of lost circulation |
| 02/12/1986 | EP0170771A1 A shock absorber for use with drilling tools |
| 02/11/1986 | US4569392 For communication in a well |
| 02/11/1986 | CA1200571A1 Swivel |
| 02/04/1986 | US4568113 Pipe connection |
| 02/04/1986 | US4567945 Electrode well method and apparatus |
| 01/29/1986 | EP0169653A1 Subsea wellhead protector |
| 01/28/1986 | US4566824 System for drilling from a water surface, which is insensitive to the swell |
| 01/28/1986 | US4566495 Concentric walled conduit for a tubular conduit string |
| 01/28/1986 | US4566168 Quick connect adapter |
| 01/28/1986 | CA1199987A1 Oil well cable |
| 01/21/1986 | USRE32070 Borehole apparatus for investigating subsurface earth formations including a plurality of pad members and means for regulating the bearing pressure thereof |
| 01/21/1986 | US4565394 Dual-wall drill pipe |
| 01/15/1986 | CN85200953U Screwed hollow drill stem for coal-cutting |
| 01/14/1986 | US4564225 Multiple lead threading |
| 01/14/1986 | CA1199353A1 Connection of drill tubes |
| 01/07/1986 | US4563757 Method and apparatus for acquiring seismic signals in a borehole |
| 01/07/1986 | US4563391 Ribbon rod for use in oil well apparatus |
| 01/03/1986 | WO1986000112A1 Collar assembly for telemetry |
| 01/02/1986 | EP0166584A2 Quick change electrical coupling |
| 12/31/1985 | US4561803 Conductor guide system for offshore drilling platform |
| 12/31/1985 | US4561802 Assembly of conductor guides for offshore drilling platform |
| 12/31/1985 | US4561683 Pipe connector with interengageable tubular pin and tubular box members |
| 12/31/1985 | CA1198667A1 Method and apparatus for conducting wireline operations in a borehole |
| 12/27/1985 | EP0165479A2 Drill pipe |
| 12/24/1985 | US4560013 Apparatus for directional drilling and the like of subterranean wells |
| 12/24/1985 | US4560012 Drill collar structure for use in deviated well bore drilling |
| 12/18/1985 | EP0165154A1 Method and device for effecting by means of specialized tools such operations as measurements in well sections highly inclined to the vertical, or the horizontals |
| 12/18/1985 | EP0164950A1 Drill string stabilizer |
| 12/17/1985 | US4558976 Quick fix drill wrench |
| 12/17/1985 | US4558973 Subsea wellhead protector |
| 12/11/1985 | EP0163958A1 Corrosion-resistant pipe coupling structures |
| 12/11/1985 | EP0163957A1 Corrosion-resistant pipe coupling structures |
| 12/11/1985 | EP0163946A1 Apparatus for optional straight or directional drilling underground formations |
| 12/10/1985 | US4557538 Assembly for effecting an electric connection through a pipe formed of several elements |
| 12/10/1985 | US4557489 Pressure balanced seal |
| 12/10/1985 | US4557339 Suitable for use in a drill string |
| 12/10/1985 | US4557332 For use in a floating vessel |
| 12/10/1985 | US4557327 For centering a tool in a well pipe |
| 12/10/1985 | US4557326 Well tool locking apparatus |
| 12/10/1985 | CA1197835A1 Down-hole drilling apparatus |
| 12/10/1985 | CA1197697A1 Buoyancy support for deep-ocean struts |
| 12/03/1985 | US4556340 Method and apparatus for production of subsea hydrocarbons using a floating vessel |
| 12/03/1985 | CA1197412A1 Sucker rods, pony rods and production thereof |
| 12/03/1985 | CA1197385A1 Buoyancy-supported struts for ocean platforms |
| 11/27/1985 | EP0162190A1 Device for optionally drilling under-ground formations, straight or directionally |
| 11/26/1985 | US4554976 Test tool for subsea blowout preventer stack |
| 11/26/1985 | CA1197183A1 Marine riser protector for use on offshore oil drilling rigs in icy waters |
| 11/26/1985 | CA1197176A1 Combination cementing shoe and basket |
| 11/19/1985 | US4554130 Consolidation of a part from separate metallic components |
| 11/19/1985 | US4553614 Compensation device for insertion in a drill string for deep-well drilling tools |
| 11/19/1985 | CA1196859A1 Wellhead assembly |
| 11/12/1985 | US4552485 Process and prepressing pipe for laying a pipeline in the earth |
| 11/12/1985 | US4552230 Drill string shock absorber |
| 11/12/1985 | CA1196626A1 Direct drive for deep-well drilling |
| 11/12/1985 | CA1196584A1 Metallic tubular structure having improved collapse strength and method of producing the same |
| 11/05/1985 | US4551050 Threaded engagement means |
| 11/05/1985 | US4550937 Joint for steel tubes |
| 11/05/1985 | US4550936 Marine riser coupling assembly |
| 11/05/1985 | CA1196267A1 Method and means for controlling the course of a bore hole |
| 10/30/1985 | EP0159374A1 Reducer coupling and positioner tool for the coupling |
| 10/29/1985 | US4549754 Tool joint |
| 10/29/1985 | US4549630 Continuous shear wave logging apparatus |
| 10/29/1985 | US4549616 Rock drill |
| 10/29/1985 | US4549615 Single-pass notching and drilling tool and method of drilling a blast role therewith |
| 10/29/1985 | US4549614 Drilling device |
| 10/29/1985 | US4549613 Downhole tool with replaceable tool sleeve sections |
| 10/23/1985 | EP0159242A1 Steel tube joint, tooling and method of obtaining greater precision |
| 10/22/1985 | US4548552 Dual valve well pump installation |
| 10/22/1985 | US4548431 Tool joint with internal/external make-up shoulders |
| 10/22/1985 | US4548428 Anti back-out steel coupling system for nonmetallic composite pipe |
| 10/22/1985 | US4548282 Method for sinking boreholes |
| 10/22/1985 | US4548263 Fitting for dual submersible pumps |
| 10/22/1985 | CA1195585A1 Moonpool plug for connecting a flexible flowline to a process vessel |
| 10/22/1985 | CA1195520A1 Drill rod coupling system |
| 10/16/1985 | EP0157874A1 Buoyancy support for deep-ocean struts |
| 10/15/1985 | US4547003 Pipe connectors |
| 10/15/1985 | CA1195317A1 Rock drill |
| 10/09/1985 | EP0157587A2 Oil well pipe joint |
| 10/08/1985 | US4545737 Method for pumping a liquid from a well and apparatus for use therein |
| 10/08/1985 | US4545702 Boring-injection device, method for improving ground by means of the device and method for investigating ground state by means of the device |
| 10/08/1985 | US4545437 Drilling riser locking apparatus and method |
| 10/08/1985 | US4545436 Centralizer band-collar connection |
| 10/08/1985 | CA1194858A1 Recovery of ground drilling equipment |
| 10/08/1985 | CA1194789A1 Spacer for deep wells |
| 10/08/1985 | CA1194781A1 Pump-down stinger assembly method and apparatus |