| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 02/09/1999 | US5868210 Method for recovering hydrocarbons from earth formations |
| 02/09/1999 | US5868201 Computer controlled downhole tools for production well control |
| 02/09/1999 | CA2189376C Hybrid coiled tubing/conventional drilling unit |
| 02/07/1999 | CA2236724A1 Centralizers for a downhole tool |
| 02/04/1999 | WO1999005478A2 Flow measurement mandrel |
| 02/04/1999 | WO1999005440A1 Oil well pipe |
| 02/04/1999 | WO1999005391A1 Drill string stabilizer |
| 02/04/1999 | WO1999005390A1 Releasable connector assembly for a perforating gun |
| 02/04/1999 | WO1999005389A1 A floating system for a marine riser |
| 02/04/1999 | WO1999005388A1 Marine riser and method of use |
| 02/04/1999 | DE19740064C1 Drillstring coupling transmitting torque through bolted flange and dogs |
| 02/03/1999 | EP0894938A1 Device for transferring fluids between the sea bottom and the surface |
| 02/03/1999 | EP0894353A1 Underground well electrical cable transition, seal and method |
| 02/02/1999 | US5865566 In a floating offshore structure for producing hydrocarbons |
| 02/02/1999 | US5865251 Isolation system and gravel pack assembly and uses thereof |
| 01/28/1999 | WO1999004132A1 Centralizer |
| 01/28/1999 | WO1999004131A1 Fastener for use in an oil tool and oil tool provided with such a fastener |
| 01/28/1999 | CA2296486A1 Fastener for use in an oil tool and oil tool provided with such a fastener |
| 01/27/1999 | EP0893573A2 Cable anchors |
| 01/27/1999 | CN2305481Y Self sealing device for kelly |
| 01/26/1999 | US5862866 Double walled insulated tubing and method of installing same |
| 01/26/1999 | CA2132244C Improved pipe joint construction and coupling therefor |
| 01/26/1999 | CA2003434C Downhole chemical cutting tool |
| 01/20/1999 | CN1041697C Tooland tool receiver used for hand tool device |
| 01/19/1999 | US5861562 Flow measurement mandrel |
| 01/19/1999 | US5860864 For connecting two spaced drive shafts |
| 01/19/1999 | CA2122957C Coiled tubing connector |
| 01/14/1999 | DE19729315A1 Transmission tube for mobile rotary borehole drill |
| 01/14/1999 | DE19728905A1 Pipe union for sections of pilot tube driven by ram |
| 01/13/1999 | EP0890014A1 Method and system for monitoring a characteristic of an earth formation in a well |
| 01/12/1999 | US5858489 Filling annular space surrounding production string in an oil well with aerogel formed in situ |
| 01/12/1999 | US5857714 Service cable and cable harness for submersible sensors and pumps |
| 01/12/1999 | US5857710 Multi-cycle releasable connection |
| 01/12/1999 | US5857531 For connection to a drill string for drilling wells at build-up rates |
| 01/12/1999 | US5857476 System for cleaning threaded and unthreaded portions of tubular members |
| 01/12/1999 | CA2195523C Drill pipe with improved connectors |
| 01/12/1999 | CA2129620C Well pump tubing scrapers |
| 01/11/1999 | CA2242592A1 Multiple lead threads for high torque transfer applications |
| 01/07/1999 | EP0889196A2 Adapters for auger drive shaft |
| 01/07/1999 | DE19727493A1 Geothermal probe in borehole, for heat pump system |
| 01/07/1999 | DE19727070A1 Drill bit for drilling in concrete |
| 01/06/1999 | CN2303079Y Anchoring means for oil pipe |
| 01/06/1999 | CN2303078Y Centralising device for directional drilling rod |
| 01/06/1999 | CN2303077Y Oil sucker hollow rod with ivalent fatigue life |
| 01/06/1999 | CN1204379A Tubing connector |
| 01/06/1999 | CN1204378A Fluid drilling system |
| 01/05/1999 | US5855062 Method and apparatus for manufacturing an insulated conductor in metal tubing |
| 12/30/1998 | WO1998059151A1 Tubular preform for well tubing |
| 12/30/1998 | WO1998059146A1 Earth formation surveying device |
| 12/30/1998 | EP0886717A1 Asymmetrical drill stem for drilling oil wells |
| 12/30/1998 | EP0886716A1 A removable guide member for guiding drill string components in a drill hole |
| 12/30/1998 | EP0886714A1 Device for drilling a bore hole in the ground |
| 12/30/1998 | EP0886554A1 Friction welded product for rock drilling and method for manufacturing the product |
| 12/30/1998 | CN1203671A Composite material structure having reduced signal attenuation |
| 12/29/1998 | US5853199 For use in a well bore |
| 12/29/1998 | US5853056 Method of and apparatus for horizontal well drilling |
| 12/29/1998 | US5853054 2-Stage underreamer |
| 12/23/1998 | WO1998058155A1 Stress relieving device |
| 12/23/1998 | WO1998058154A1 A drill bit |
| 12/23/1998 | WO1998058153A1 A drill bit with drive and retainer means |
| 12/23/1998 | WO1998058152A1 Method and apparatus for drilling subsea wells |
| 12/23/1998 | EP0886032A2 Wellbore cable protector |
| 12/23/1998 | EP0824628B1 Connector assembly for an expandable slotted pipe |
| 12/23/1998 | CN2301531Y Steel ball sucker rod centralizer |
| 12/22/1998 | US5850875 Method of positioning a screen within a subterranean well |
| 12/17/1998 | WO1998057089A1 Pipe joint |
| 12/17/1998 | WO1998057027A1 Extension drilling system |
| 12/16/1998 | EP0884451A2 Cable anchor assembly |
| 12/16/1998 | EP0670021B1 Pipe connecting assembly and method for joining two lengths of steel pipe by a press-fit connection |
| 12/16/1998 | CN2300720Y Collision press type miniature stage extension hanger |
| 12/16/1998 | CN2300719Y Light hydraulic lift for lifting pipe under well |
| 12/16/1998 | CN2300718Y Drop off proof oil-pumping rod and joint hoop |
| 12/15/1998 | US5848646 Well completion apparatus for use under pressure and method of using same |
| 12/15/1998 | US5848642 Device for coil tubing operations |
| 12/09/1998 | EP0882868A2 Method of suspending an ESP within a wellbore |
| 12/09/1998 | EP0815342B1 Improved casing shoe |
| 12/09/1998 | EP0644979B1 Method and apparatus for inspecting subsurface environments |
| 12/09/1998 | CN2299933Y Stamping and forging welded hollow sucker rod |
| 12/09/1998 | CA2237468A1 Adapters for auger drive shaft |
| 12/08/1998 | US5845711 For lowering a downhole tool on a coiled tubing through an outer pipe string |
| 12/08/1998 | US5845707 Method of completing a subterranean well |
| 12/03/1998 | WO1998054501A1 Screw joint for oil well pipe |
| 12/03/1998 | WO1998039592A3 Apparatus and methods for lining of pipes |
| 12/03/1998 | DE19803304A1 Rotary percussive drill rod in overhead drilling |
| 12/02/1998 | EP0880637A1 Hydraulically releasable coupling |
| 12/02/1998 | EP0880450A1 System for loading ships at sea |
| 12/02/1998 | EP0771400A4 Drill pipe with improved connectors |
| 12/01/1998 | US5842817 Pipe compression ring |
| 12/01/1998 | US5842530 For the drilling and servicing of bore holes in the earth |
| 11/26/1998 | WO1998053178A1 A centralizer casing collar locator |
| 11/26/1998 | WO1998053177A1 Stress reduction groove for tubular connection |
| 11/26/1998 | WO1998053176A2 Marine riser |
| 11/25/1998 | CN2298341Y Saft type integral no-connection electric heating sucker rod |
| 11/25/1998 | CN2298340Y Straightening and surface hardening process equipment for sucker rod |
| 11/25/1998 | CN1199809A Production technology of integral upset hollow pumping rod |
| 11/25/1998 | CN1040901C Process for producing high-strength sucker rod |
| 11/24/1998 | US5839524 Quick release locking drill rod and assembly |
| 11/24/1998 | US5839519 Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment |
| 11/24/1998 | CA2128114C Stress relief groove for drill pipe |
| 11/19/1998 | WO1998051900A1 Arrangement in a drilling apparatus |