| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
|---|
| 03/06/1997 | WO1997008422A1 Well tool for use in oil and gas wells |
| 03/06/1997 | WO1997008421A1 Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit |
| 03/06/1997 | DE19621849A1 Borehole drilling device for rotating and for moving tube lengths axially |
| 03/06/1997 | CA2229159A1 Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit |
| 03/05/1997 | EP0760417A2 Method of and apparatus for assembling a tool string |
| 03/05/1997 | EP0701651B1 Multiple-seal underwater pipe-riser connector |
| 03/05/1997 | EP0604568B1 Downhole activated system for perforating a wellbore |
| 03/05/1997 | EP0597885B1 A double-acting accelerator for use with hydraulic drilling jars |
| 03/05/1997 | CN2248776Y Shock-adsorber for swab rod |
| 03/04/1997 | US5607257 Drilling apparatus |
| 03/04/1997 | US5607250 Quick connect coupling |
| 03/04/1997 | CA2127387C Coiled tubing external connector with packing element |
| 02/27/1997 | WO1996041931A3 Subsurface signal transmitting apparatus |
| 02/27/1997 | WO1996038653A3 Device for controlling the weight on an earth drill bit |
| 02/26/1997 | EP0759497A2 Production tubing threaded joint |
| 02/25/1997 | CA2105474C Well orienting tool and/or thruster |
| 02/25/1997 | CA2056318C Threaded tubular connection with outer threaded ring |
| 02/20/1997 | WO1997006342A1 Stabiliser tool |
| 02/20/1997 | WO1997006341A1 Riser |
| 02/20/1997 | WO1997006337A1 Drilling method and casing shoe |
| 02/20/1997 | CA2201118A1 Stabiliser tool |
| 02/19/1997 | CA2183505A1 Method of and apparatus for assembling a tool string |
| 02/18/1997 | US5603386 Downhole tool for controlling the drilling course of a borehole |
| 02/18/1997 | US5603385 Rotatable pressure seal |
| 02/18/1997 | US5603282 Utility pipe displacement sensor |
| 02/13/1997 | WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 02/12/1997 | EP0757768A1 Device for permanent joining of tubes |
| 02/12/1997 | CN1142582A Pipe screw joint |
| 02/05/1997 | EP0697058B1 Drill pipe for directional drilling |
| 02/05/1997 | EP0353309B1 Method of constructing a well |
| 02/05/1997 | CN2246704Y Double-spring disjointing device |
| 02/05/1997 | CN1142259A Fluid-tight connecting apparatus |
| 02/04/1997 | US5599004 Apparatus for the injection of cable into coiled tubing |
| 02/04/1997 | US5598750 Elements faced with superhard material |
| 02/04/1997 | CA2168651C Improved slick line system with real-time surface display |
| 01/30/1997 | WO1997003151A1 Compressible graphite lubricant and anaerobic pipe sealant |
| 01/29/1997 | EP0756066A2 Apparatus for housing and sealing of instruments in a downhole tool |
| 01/29/1997 | CN2246189Y Sealing telescope drill rod |
| 01/28/1997 | CA2040281C Wireline supported perforating gun enabling oriented perforations |
| 01/23/1997 | WO1997002405A1 Drilling apparatus |
| 01/22/1997 | EP0754105A1 Method for facing a substrate |
| 01/21/1997 | US5596142 Well logging apparatus comprising a measuring pad and a combinaton device including such apparatus |
| 01/21/1997 | US5595254 Tilting bit crown for earth-boring drills |
| 01/16/1997 | WO1997001693A1 Hydraulic thruster for use in a drill string |
| 01/16/1997 | CA2224720A1 Hydraulic thruster for use in a drill string |
| 01/15/1997 | EP0753095A1 Casing tube with casing shoe |
| 01/15/1997 | EP0668978B1 Multilayer fire protective coating |
| 01/14/1997 | CA2181117A1 Well completion device |
| 01/09/1997 | WO1997001017A1 Insulated and/or concentric coiled tubing |
| 01/08/1997 | CN2244608Y Ball shooting type remote-controlled reducing stabilizer |
| 01/08/1997 | CN2244607Y Displacement type remote-controlled reducing stabilizer |
| 01/07/1997 | US5590728 Elements faced with superhard material |
| 01/03/1997 | WO1997000371A1 Down hole hammer assembly |
| 01/03/1997 | CA2224656A1 Down hole hammer assembly |
| 01/02/1997 | EP0586679B1 Clamps for use with well tubulars |
| 01/01/1997 | CN1139470A Tension leg platform and method of installation therefor |
| 12/31/1996 | US5588916 Torque control device for rotary mine drilling machine |
| 12/31/1996 | US5588771 Connector for coupling a pair of rods |
| 12/27/1996 | WO1996041931A2 Subsurface signal transmitting apparatus |
| 12/25/1996 | CN1033659C Drill string component |
| 12/24/1996 | US5587540 Soil sampling device with latch assembly having a variable circumferential shape |
| 12/24/1996 | US5586612 Roller cone bit with positive and negative offset and smooth running configuration |
| 12/24/1996 | US5586610 Kelly bar having hardened flutes |
| 12/24/1996 | US5586609 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 12/19/1996 | WO1996041066A1 Logging system combining video camera and sensors for environmental downhole conditions |
| 12/19/1996 | WO1996041063A1 Centralizer |
| 12/19/1996 | DE19521447A1 Roller cutter drilling bit for bore holes achieving high cutting efficiency |
| 12/18/1996 | EP0748923A2 Drill rod |
| 12/18/1996 | CN2242973Y Wheel drilling joint |
| 12/17/1996 | US5584488 Seal |
| 12/17/1996 | US5584342 Subterranean rotation-inducing device and method |
| 12/12/1996 | WO1996039570A1 Subterranean rotation-inducing device and method |
| 12/12/1996 | WO1996039569A1 Drill pipe casing protector and method |
| 12/11/1996 | EP0747567A2 Drill pipe with concave wrench receiving recesses |
| 12/11/1996 | EP0746666A1 Fluid-tight connecting apparatus |
| 12/10/1996 | US5582260 Control of at least two stabilizing arms in a drill or core device |
| 12/10/1996 | US5582259 Modulated bias unit for rotary drilling |
| 12/10/1996 | CA2127013C Coiled tubing wireline retrievable and selective gas lift assembly |
| 12/08/1996 | CA2176538A1 Drill pipe having concave wrenching recesses |
| 12/05/1996 | WO1996038653A2 Device for controlling the weight on an earth drill bit |
| 12/05/1996 | DE19515001A1 Drill head of hollow drill auger |
| 12/03/1996 | US5579854 Drill pipe casing protector and method |
| 12/03/1996 | US5579843 Resilient spider for well installation |
| 12/03/1996 | CA2177947A1 Coiled tubing apparatus |
| 11/28/1996 | WO1996037681A1 Connector assembly for an expandable slotted pipe |
| 11/28/1996 | WO1996037680A1 Connector assembly for an expandable slotted pipe |
| 11/26/1996 | US5577925 For auxiliary conduits attached to well tubulars |
| 11/26/1996 | US5577857 For concrete foundation piles |
| 11/26/1996 | US5577560 Fluid-actuated wellbore tool system |
| 11/21/1996 | WO1996036790A1 Device for the power supply of an immersed pump hanging from a pipe, particularly a flexible pipe |
| 11/21/1996 | WO1996036789A1 System and apparatus for inhibiting helical stack-out |
| 11/21/1996 | WO1996036788A1 Adjustable stabilizer for directional drilling |
| 11/20/1996 | EP0742968A1 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 11/20/1996 | EP0742867A1 Drilling bit assembly and apparatus |
| 11/19/1996 | US5575743 Method and apparatus for exercising adductor muscles |
| 11/19/1996 | US5575343 Drilling a bore hole having a short radius curved section followed by a straight section |
| 11/19/1996 | US5575333 Centralizer |
| 11/13/1996 | EP0741834A1 System, method and cutterhead for dry full-area drilling |
| 11/13/1996 | EP0741822A1 Tension leg platform and method of installation therefor |
| 11/13/1996 | CN2240037Y Single oil-collecting pipe with electrothermal coating |