| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 09/23/1999 | WO1999047785A1 Two-step, low torque wedge thread for tubular connector |
| 09/23/1999 | WO1999047784A1 Supporting frame for risers |
| 09/22/1999 | EP0943782A2 Sensor array for downhole use |
| 09/22/1999 | EP0651852B1 Gravel pack screen for well completions |
| 09/22/1999 | CN2339743Y Self-rotating type coupling-uncoupling device |
| 09/22/1999 | CN2339742Y Double-clamp sucker rod reverse-fastener |
| 09/22/1999 | CN2339741Y Long-service-life turbine driller without rubber elements |
| 09/22/1999 | CN2339740Y Petroleum case pipe |
| 09/22/1999 | CN1229452A Rotary cone drill bit with integral stabilizers |
| 09/21/1999 | US5954724 Titanium molybdenum hafnium alloys for medical implants and devices |
| 09/21/1999 | US5954374 Pipe connectors |
| 09/21/1999 | US5954136 Method of suspending an ESP within a wellbore |
| 09/21/1999 | US5954134 Methods of completing a subterranean well and associated apparatus |
| 09/21/1999 | US5954133 Methods of completing wells utilizing wellbore equipment positioning apparatus |
| 09/16/1999 | WO1999046615A1 Clamped receiver array using coiled tubing conveyed packer elements |
| 09/16/1999 | CA2264409A1 Method for permanent emplacement of sensors inside casing |
| 09/15/1999 | EP0941200A1 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel |
| 09/14/1999 | US5951061 Elastomeric subsea flex joint and swivel for offshore risers |
| 09/14/1999 | US5950744 Method and apparatus for aligning drill pipe and tubing |
| 09/14/1999 | US5950743 Method for horizontal directional drilling of rock formations |
| 09/14/1999 | US5950739 Earth piercing apparatus |
| 09/14/1999 | US5950737 For a riser of an offshore well platform |
| 09/10/1999 | WO1999045232A1 A mill and a method for milling |
| 09/10/1999 | WO1999045229A1 An axle, a friction reducing fitting and an axle installation method |
| 09/09/1999 | DE19817144C1 Releasable joint for connecting a drill string section with a drive shaft in hydraulic rotary percussive drilling equipment used for earth and rock drilling of boreholes |
| 09/08/1999 | EP0940557A2 Electrically insulating gap subassembly |
| 09/08/1999 | EP0939854A1 Connector for an expandable tubing string |
| 09/07/1999 | US5947214 BIT torque limiting device |
| 09/07/1999 | US5947213 In a well bore |
| 09/07/1999 | US5947201 One-trip window-milling method |
| 09/07/1999 | US5947198 Downhole tool |
| 09/07/1999 | US5946757 360° thread cleaner |
| 09/02/1999 | WO1999043974A1 Threaded connection for internally clad pipe |
| 09/02/1999 | WO1999027223A3 Method and apparatus for injecting coil tubing down pipelines |
| 09/01/1999 | EP0938621A1 Communication conduit in a well tool |
| 09/01/1999 | CN2336081Y Hydraulic oscillation turnback |
| 08/31/1999 | US5944448 Oil field installation with mooring and flowline system |
| 08/31/1999 | US5944124 Fiber impregnated with polymer |
| 08/26/1999 | WO1999042754A1 Flexible conduit for static use in a corrosive environment |
| 08/26/1999 | WO1999042698A1 Centralizer |
| 08/26/1999 | DE19828303C1 Aligned stacking of drums containing heat-dissipating radioactive waste in near-vertical bore holes |
| 08/25/1999 | CN2334868Y High-strength flexible drilling rod |
| 08/24/1999 | US5941312 Method of fabricating a rod guide, and a rod guide/sucker rod combination |
| 08/24/1999 | US5941310 Monobore completion/intervention riser system |
| 08/24/1999 | CA2261525A1 Pc pump stabilizer |
| 08/19/1999 | WO1999041484A1 Riser pipe construction and module therefor |
| 08/19/1999 | WO1999041142A1 Spar system |
| 08/18/1999 | EP0828923B1 Device for controlling the weight on an earth drill bit |
| 08/18/1999 | EP0817901A4 Dual-member pipe joint for a dual member drill string |
| 08/18/1999 | CN2333821Y Friction welding hollow sucker rod |
| 08/18/1999 | CN1226304A Centralizer |
| 08/17/1999 | US5937957 Cutting bed impeller |
| 08/17/1999 | US5937954 Method for directional drilling |
| 08/17/1999 | US5937948 Method of centralizing a string of tubulars in a well |
| 08/11/1999 | EP0935050A2 Wear resistant crossover |
| 08/11/1999 | EP0935049A2 Wellbore apparatus and methods |
| 08/11/1999 | EP0828918B1 Connector assembly for an expandable slotted pipe |
| 08/11/1999 | CN2332809Y Two-way safety joint |
| 08/11/1999 | CN2332808Y Seizing-proof speed increasing joint |
| 08/11/1999 | CN2332807Y High pressure sealing joint |
| 08/10/1999 | US5934391 Sonde housing door hold-down system |
| 08/10/1999 | US5934378 Centralizers for a downhole tool |
| 08/10/1999 | US5934371 Remotely controlled shut-off valve and variable choke assembly |
| 08/10/1999 | US5933945 Composite coiled tubing apparatus and methods |
| 08/10/1999 | CA2140748C Reduced diameter down-hole instrument cable |
| 08/05/1999 | WO1999039076A1 Method and apparatus for boring through a solid material |
| 08/05/1999 | DE19813409A1 Device for coupling rotary table connection of drilling apparatus to tube adapter for producing bore holes |
| 08/05/1999 | DE19748643C1 Compression ring transferring load between adjacent pipes during trenchless pipe installation or jacking |
| 08/05/1999 | CA2260624A1 Lateral wellbore connection |
| 08/03/1999 | US5931602 Device for oil production at great depths at sea |
| 08/03/1999 | US5931511 Threaded connection for enhanced fatigue resistance |
| 08/03/1999 | US5931240 Drill bit concave steering channel for horizontal directional drilling |
| 08/03/1999 | US5931239 Adjustable stabilizer for directional drilling |
| 08/03/1999 | US5931237 Soil testing assemblies |
| 07/29/1999 | WO1999037881A2 Tubing shoe |
| 07/28/1999 | EP0931202A1 Welded drill pipes in which the internal flash is removed and relative procedure of manufacturing |
| 07/28/1999 | EP0791124A4 Stabiliser tool |
| 07/28/1999 | CN2330777Y Double-pipe vacuum well pipe |
| 07/27/1999 | US5927902 Device for suspending flexible and semi-flexible pipes on structures at sea |
| 07/27/1999 | US5927411 Connector with variable resistance retention member |
| 07/27/1999 | US5927409 Used in a drill string for drilling a bore through a formation |
| 07/27/1999 | US5927344 Subsea flexible pipe |
| 07/27/1999 | US5927307 Apparatus for environmentally acceptable cleaning of oil well components |
| 07/22/1999 | WO1999036924A1 High pressure differential electrical connector |
| 07/22/1999 | WO1999036661A1 Extruded casing centralizer |
| 07/22/1999 | WO1999036660A1 Bronze alloy casing centraliser |
| 07/21/1999 | EP0929772A2 Improved emergency release tool |
| 07/21/1999 | EP0738355B1 Improvements in or relating to apparatus for use in forming piles |
| 07/21/1999 | CN2329757Y Hollow oil pump non-oil pipe oil extraction tubular column |
| 07/21/1999 | CN1044279C Pipe screw joint composed of pin shape part and box shape part |
| 07/20/1999 | US5924745 Connector assembly for an expandable slotted pipe |
| 07/20/1999 | US5924489 Method of severing a downhole pipe in a well borehole |
| 07/15/1999 | WO1999035366A1 A drill pipe and method of forming and reconditioning a drill pipe |
| 07/15/1999 | WO1999035213A1 Water soluble invert emulsions |
| 07/15/1999 | WO1999035212A1 Water soluble invert emulsions |
| 07/15/1999 | WO1999035211A1 Conductive medium for openhole logging and logging while drilling |
| 07/15/1999 | WO1999025949A3 Improvements in or relating to downhole tools |
| 07/14/1999 | EP0928920A1 Oil well pipe |
| 07/14/1999 | EP0928877A2 Apparatus and methods for deploying tools in multilateral wells |
| 07/14/1999 | EP0928876A1 Device for drilling a bore hole in the ground |