| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 06/20/1989 | CA1256095A1 Combination shock tool and reamer/integral blade stabilizer |
| 06/20/1989 | CA1256094A1 High bending strength ratio drill string components |
| 06/14/1989 | EP0213192B1 Marine riser fill-up valve |
| 06/14/1989 | CN2039343U Assisting set without supporting jack |
| 06/13/1989 | US4838349 Apparatus for testing selected zones of a subterranean bore |
| 06/13/1989 | US4838079 Multi-channel pipe for monitoring groundwater |
| 06/13/1989 | US4838068 Method of fabricating threaded connection for pipes |
| 06/13/1989 | CA1255652A1 Drill steel |
| 06/08/1989 | DE3839898A1 Anordnung an einem antriebskopf fuer gesteinsbohrmaschinen Arrangement on a drive head for rock drills |
| 06/07/1989 | EP0173691B1 Pipe joint |
| 06/06/1989 | US4836306 Down hole drill chuck lock |
| 06/06/1989 | US4836305 Drill pipes and casings utilizing multi-conduit tubulars |
| 06/06/1989 | CA1255084A1 Method for producing clad tubular product |
| 06/06/1989 | CA1255083A1 Method and assembly for producing extrusion-clad tubular product |
| 05/31/1989 | EP0317605A1 Device for guiding a drilling tool and/or pipe string |
| 05/31/1989 | CN2038541U Auto-lock drop-join apparatus |
| 05/30/1989 | US4834594 Drill steel drive unit |
| 05/30/1989 | US4834196 Well drilling tool |
| 05/24/1989 | CN2038147U Clamp apparatus for oil pumping rod |
| 05/24/1989 | CN1033101A Method of detecting condition of three-dimensional case |
| 05/23/1989 | US4832757 Pumps, carbon, manganese, molybdenum steels |
| 05/23/1989 | US4832137 Method for protecting a pipe casing from a drill pipe string |
| 05/23/1989 | US4832135 Flow through raise boring bit |
| 05/23/1989 | CA1254501A1 Tensile ring cable head assembly |
| 05/18/1989 | WO1989004418A1 Self-propelled subsoil penetrating tool system |
| 05/17/1989 | CN2037773U Separationproof device for steel-ball type oil-extracting rod |
| 05/17/1989 | CN2037772U Overlaid-ball type guide for oil-extracting rod |
| 05/17/1989 | CN2037771U Ball-bearing type connecting hoop for oil-extracting rod |
| 05/17/1989 | CN2037770U Combined superdepth-hole drill |
| 05/16/1989 | US4830411 Threaded joint for oil-well pipe |
| 05/16/1989 | US4830408 Connector assembly |
| 05/16/1989 | US4830121 Break-out joint with selective disabler |
| 05/16/1989 | US4830113 Well pumping method and apparatus |
| 05/16/1989 | US4830105 Centralizer for wellbore apparatus |
| 05/16/1989 | CA1254247A1 Insulating coupling for drill collars and method of manufacture thereof |
| 05/16/1989 | CA1254063A1 Consolidation of a part from separate metallic components |
| 05/11/1989 | DE3736302A1 Coupling, in particular for diamond drilling bit with stem pipe and pipe-thread connection |
| 05/09/1989 | US4828295 Steel tube threaded joint having an impervious device at the level of the threading |
| 05/09/1989 | US4828294 Threaded joint for steel pipes containing a sealing device located at the level of the threading |
| 05/09/1989 | US4828291 Fluted safety joint apparatus for use in cased oil and gas wells |
| 05/09/1989 | US4828051 Method and apparatus for data transmission in a well using a flexible line with stiffener |
| 05/09/1989 | US4828027 Apparatus for monitoring a parameter in a well |
| 05/05/1989 | WO1989003973A1 Method and device for controlling the condition of a lengthy construction element |
| 05/03/1989 | EP0314130A1 Accelerator for a fishing jar |
| 05/03/1989 | EP0314123A2 Connector, especially for diamond core bit with tubular part and threaded connection |
| 05/03/1989 | CN2036992U Inclination-preventing straightness-keeping device |
| 05/02/1989 | US4825947 Apparatus for use in cementing a casing string within a well bore |
| 05/02/1989 | US4825946 Apparatus for monitoring a parameter in a well |
| 05/02/1989 | US4825674 Metallic tubular structure having improved collapse strength and method of producing the same |
| 05/02/1989 | CA1253533A1 High-pressure sealing means for longitudinally movable parts of deep-well drilling tools |
| 05/02/1989 | CA1253435A1 Integral buoyant riser |
| 04/26/1989 | EP0313413A1 Flexible drill string member and method of drilling deviated holes |
| 04/26/1989 | EP0313374A1 Well-logging method using a drill pipe conveyed logging system |
| 04/26/1989 | EP0312926A1 Rock drill |
| 04/26/1989 | CN2036570U Rotator of pumping rod |
| 04/25/1989 | US4823891 Stabilizer sleeve for drill string |
| 04/25/1989 | US4823456 Method for protecting sucker rod couplings from abrasion and corrosion |
| 04/25/1989 | CA1253054A1 Method for the surface hardening of drill rod couplings, and the rods thus obtained |
| 04/18/1989 | US4823125 Method and apparatus for stabilizing a communication sensor in a borehole |
| 04/18/1989 | US4822201 Coupling pin for sucker rod made of fiber-reinforced plastic material |
| 04/18/1989 | US4822081 Driveable threaded tubular connection |
| 04/18/1989 | US4821818 Tube auger sections |
| 04/18/1989 | US4821817 Actuator for an appliance associated with a ducted body, especially a drill rod |
| 04/18/1989 | US4821804 Composite support column assembly for offshore drilling and production platforms |
| 04/18/1989 | US4821798 Heating system for rathole oil well |
| 04/12/1989 | EP0311585A2 Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing |
| 04/12/1989 | CN2035792U Two-way damper for drilling tool |
| 04/12/1989 | CN1032377A Suspended well-drilling technology and its apparatus |
| 04/12/1989 | CN1003885B Joint between two thin-walled tubes |
| 04/04/1989 | US4818167 Tapered screw member having guide means |
| 04/04/1989 | US4818146 Wellhead and conductor stabilized by a cable and anchor system |
| 04/04/1989 | US4817962 Universal tubular connection having a variable metal-to-metal seal width corresponding to material yield strength |
| 04/04/1989 | US4817716 Pipe connector and method of applying same |
| 04/04/1989 | US4817710 Apparatus for absorbing shock |
| 04/04/1989 | CA1251926A1 Method and device for the determination of the screwing torque of a tubular, conically threaded, joint having an engagement stop, useable in the oil industry |
| 03/29/1989 | EP0309084A2 Joining metal tubes |
| 03/28/1989 | US4815540 Method and apparatus for releasing a well perforating gun from a supporting tubing string |
| 03/22/1989 | CN2034613U Guiding steady rod installation of drilling rod |
| 03/22/1989 | CN2034612U Connecting band of roller guide type oil attracting lever |
| 03/21/1989 | US4814609 Methods and apparatus for safely measuring downhole conditions and formation characteristics while drilling a borehole |
| 03/21/1989 | US4813717 Oilwell tubing connection |
| 03/21/1989 | US4813714 Petroleum equipment tubular connection |
| 03/21/1989 | CA1251490A1 Tubular connection |
| 03/15/1989 | EP0307387A1 Pump rod guides for rotating pump drives |
| 03/15/1989 | CN2034196U Anti-slip device for sucker rod |
| 03/15/1989 | CN2034194U Anti-wax, guided multi-functional connector |
| 03/14/1989 | US4811800 Flexible drill string member especially for use in directional drilling |
| 03/14/1989 | US4811798 Drilling motor deviation tool |
| 03/14/1989 | US4811792 Well tool stabilizer and method |
| 03/14/1989 | US4811786 Downhole gaseous liquid flow agitator |
| 03/14/1989 | US4811598 Downhole temperature measurements |
| 03/09/1989 | WO1989002023A1 Radially stabilized drill bit |
| 03/07/1989 | US4810010 Composite tubing connector assembly |
| 03/07/1989 | US4809777 Well tool |
| 03/05/1989 | WO1989003972A1 Method for controlling the condition of a prolongated envelope |
| 03/01/1989 | CN2033438U Insert type junction of a elastic cartridge of brill rod |
| 03/01/1989 | CN1031355A Reversible, articulated mechanical coupling and relevant seat, for anchorages under tension |
| 02/28/1989 | US4808034 System and method for securing a marine riser to a floating structure |
| 02/28/1989 | US4808032 Thrust pipe |
| 02/28/1989 | US4807708 Directional drilling of a drill string |