| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/24/2001 | CA2221068C Drill bit for horizontal directional drilling of rock formations |
| 07/19/2001 | WO2001051837A2 System and method for the connection of a two-piece drill pipe protector |
| 07/19/2001 | WO2001051764A1 Telescoping tool |
| 07/19/2001 | WO2001051761A1 Steerable modular drilling assembly |
| 07/19/2001 | WO2001051759A2 Torque reduction tool |
| 07/19/2001 | CA2397101A1 Telescoping tool |
| 07/18/2001 | CN2439537Y Blowout prevention and no clearance type joint |
| 07/18/2001 | CN2439536Y Pipe column by utilization of old oil pipe |
| 07/17/2001 | US6260850 Annular chamber seal |
| 07/17/2001 | US6260636 Rotary-type earth boring drill bit, modular bearing pads therefor and methods |
| 07/17/2001 | US6260634 Sonde housing for directional drilling |
| 07/17/2001 | US6260626 Method and apparatus for completing an oil and gas well |
| 07/17/2001 | US6260622 Apparatus and method of injecting treatment fluids into a formation surrounding an underground borehole |
| 07/17/2001 | US6260617 Skate apparatus for injecting tubing down pipelines |
| 07/17/2001 | CA2102317C Centraliser |
| 07/12/2001 | WO2001049967A1 Torque release coupling for use in drill strings |
| 07/12/2001 | WO2001049965A1 Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole |
| 07/12/2001 | WO2001049964A1 Long gauge roller vane drilling motor |
| 07/12/2001 | DE10000013A1 Saugbohrer Piston sampler |
| 07/12/2001 | CA2396532A1 Long gauge roller vane drilling motor |
| 07/11/2001 | EP0996811B1 Centralizer |
| 07/10/2001 | US6257801 Riser arrangement for offshore vessel and method for installation |
| 07/10/2001 | US6257792 Retaining ring |
| 07/10/2001 | US6257339 Packer system |
| 07/10/2001 | US6257337 Submerged riser tensioner |
| 07/05/2001 | US20010006122 Suction tool |
| 07/05/2001 | US20010006120 Multiple air hammer apparatus and excavating direction correcting method therefor |
| 07/05/2001 | US20010006109 External casing anchor |
| 07/04/2001 | EP1112809A2 Drill with suction means |
| 07/04/2001 | EP1112434A1 Device for application of dope on male threads |
| 07/04/2001 | CN2437841Y Flexible sucker rod centering device |
| 07/04/2001 | CN2437840Y Multifunctional connector |
| 07/03/2001 | US6255592 Flexible armored communication cable and method of manufacture |
| 07/03/2001 | US6254147 Fluid-tight connecting apparatus |
| 07/03/2001 | US6254146 Thread form with multifacited flanks |
| 07/03/2001 | US6253863 Side cutting gage pad improving stabilization and borehole integrity |
| 07/03/2001 | US6253855 Intelligent production riser |
| 07/03/2001 | US6253846 Internal junction reinforcement and method of use |
| 06/28/2001 | WO2001046550A1 Drilling bit for drilling while running casing |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/28/2001 | US20010004792 Manufacture process of coupling handle for coupling the drilling rod in the mandrel of blast furnace taphole drill |
| 06/27/2001 | EP1109989A1 Cable protector and support |
| 06/27/2001 | EP1109974A1 Well riser lateral restraint and installation system for offshore platform |
| 06/26/2001 | US6250406 Connection arrangement for a two-piece annular body |
| 06/26/2001 | US6250405 Drill pipe protector assembly |
| 06/26/2001 | US6250395 Apparatus system and method for installing and retrieving pipe in a well |
| 06/26/2001 | US6250394 Apparatus for assisting the advancement of a work string and method |
| 06/21/2001 | WO2001044616A1 Lockable drill steel and chuck assembly |
| 06/20/2001 | CN2435510Y Petroleum drilling rod female adapter |
| 06/19/2001 | US6249119 Rotating electromagnetic field defect detection system for tubular goods |
| 06/19/2001 | US6247537 High pressure fluid seal for sealing against a bit guide in a wellhead and method of using |
| 06/19/2001 | US6247535 Orienting and locking swivel and method |
| 06/17/2001 | CA2327560A1 Drill bit inserts with variations in thickness of diamond coating |
| 06/14/2001 | WO2001042617A1 Reamer shoe |
| 06/14/2001 | WO2001042615A2 Drill rod |
| 06/14/2001 | WO2001041549A2 Collapsible buoyancy device for risers on offshore structures |
| 06/14/2001 | US20010003318 Drill bit |
| 06/14/2001 | US20010003314 Rotating casing assembly and method |
| 06/13/2001 | EP1106778A1 Seal for expandable tubular connections |
| 06/13/2001 | EP1105581A1 Marine riser having variable buoyancy |
| 06/13/2001 | EP0862681B1 Downhole apparatus and method for expanding a tubing |
| 06/13/2001 | DE10060901A1 Bohrkrone Drill bit |
| 06/13/2001 | CN2434425Y High strength sucker rod corrector |
| 06/13/2001 | CN2434424Y Oil pipeline with inner inlaid metal anti-corrosion lining for oil field |
| 06/13/2001 | CN2434423Y Clamping rotary oil pipe anchor |
| 06/12/2001 | US6244631 High efficiency drill pipe |
| 06/12/2001 | US6244347 Subsea well drilling and/or completion apparatus |
| 06/12/2001 | US6244345 Lockable swivel apparatus and method |
| 06/07/2001 | WO2001040615A1 Downhole device |
| 06/07/2001 | US20010002626 Method of creating a wellbore in an underground formation |
| 06/07/2001 | DE19955377A1 Rohrverbindung Pipe connection |
| 06/06/2001 | CN2433388Y Rotary paraffin scraping centralising device |
| 06/06/2001 | CN1066797C Tubular actuator component for use in a drill column |
| 06/05/2001 | USH1963 High pressure differential electrical connector |
| 06/05/2001 | US6241033 Drill string apparatus and method of extending the length of a drill string |
| 06/05/2001 | US6241032 One-way drill string clutch |
| 06/05/2001 | US6241030 Hydraulic underreamer and sections for use therein |
| 06/05/2001 | US6241029 Earth formation surveying device |
| 06/05/2001 | US6241022 Control line connector |
| 06/05/2001 | US6241018 Hydraulic running tool |
| 06/05/2001 | CA2339684A1 Downhole jet pump |
| 06/02/2001 | CA2291394A1 Method and apparatus for reducing abrasive contact of a sucker rod string against well tubing |
| 05/31/2001 | WO2001038687A2 Pipe connecting method |
| 05/31/2001 | WO2001038686A1 A thread joint, a male portion and a female portion |
| 05/31/2001 | WO2001038685A1 A thread joint and a male portion |
| 05/31/2001 | WO2001004520A8 Expandable joint connector |
| 05/31/2001 | US20010001991 Oleaginous fluid, a polar organic solvent, and an electrolytic salt present in a concentration so as to permit the electrical logging of the subterranean well, and a carbon dioxide buffer |
| 05/31/2001 | CA2392411A1 A thread joint and a male portion |
| 05/30/2001 | EP1102913A1 Downhole tension swivel sub |
| 05/30/2001 | EP1102912A1 A method of extending the length of a drill string, a drill string element and a coupling member |
| 05/30/2001 | CN2432330Y 柔性稳定器 Flexible stabilizers |
| 05/30/2001 | CN2432329Y Overdiameter stabilizer |
| 05/30/2001 | CN2432328Y Contact roller overdiameter stabilizer |
| 05/30/2001 | CN2432327Y Circular arc roller centralizing type sucker polish rod centralizer |
| 05/30/2001 | CN2432326Y Downhole pipe string breakaway vibration damper |
| 05/30/2001 | CN1066515C Downhole tool |
| 05/30/2001 | CA2291301A1 Rotating casing assembly |
| 05/29/2001 | US6238489 Covering with a conformal cap the interior and exterior surfaces of the end of an elongated metal drill bit having a central channel, thermochemical treatment of drill whereby the depth of surface treatment tapers at edge of cap |
| 05/29/2001 | US6238141 Apparatus for static underground drilling |
| 05/29/2001 | US6237967 Threaded connection for oil country tubular goods and its method of manufacturing |