| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 04/22/1999 | WO1999019594A1 Oil tool |
| 04/22/1999 | WO1998044236A9 Threaded joint for tubes |
| 04/21/1999 | EP0909877A1 Well tool for downhole formation testing |
| 04/21/1999 | EP0909876A2 System for transmitting data or electric current for a drilling apparatus |
| 04/21/1999 | EP0909870A1 Coupling for a force transmitting device |
| 04/21/1999 | EP0792429A4 High-pressure fiber reinforced composite pipe joint |
| 04/21/1999 | CN2315289Y Special structure solid sucker rod |
| 04/21/1999 | CN2315287Y Drilling rig of well drilling machine on gravel layer |
| 04/21/1999 | CN1214756A Method and sytsem for monitoring characteristic of earth formation in well |
| 04/20/1999 | US5895619 Method for casting a bidirectional foam pig |
| 04/20/1999 | CA2084836C Shock isolation sub for use with downhole explosive actuated tools |
| 04/15/1999 | WO1999018382A1 Screw joint for oil well pipes and method of manufacturing same |
| 04/15/1999 | CA2214325A1 Positive wet/dry wireline connect |
| 04/14/1999 | EP0908598A2 Method for laying a conduit and conduit comprising a casing and a production tubing |
| 04/14/1999 | EP0907822A1 Method for expanding a steel tubing and well with such as tubing |
| 04/14/1999 | CN2314087Y Pressure reducing joint at bottom of well |
| 04/14/1999 | CN2314086Y Hydraulic expansion compensator for casing of oil-gas well |
| 04/14/1999 | CN1042909C Spiral anchor with deoperable screw |
| 04/14/1999 | CA2250323A1 Data transfer system |
| 04/14/1999 | CA2250317A1 Early evaluation system with drilling capability |
| 04/13/1999 | US5894104 Coax-slickline cable for use in well logging |
| 04/13/1999 | CA2247667A1 Reinforced composite material line |
| 04/08/1999 | WO1999017045A1 Improved composite drill pipe |
| 04/08/1999 | WO1999005478A3 Flow measurement mandrel |
| 04/07/1999 | EP0907002A2 Catenary riser supports |
| 04/07/1999 | EP0737268B1 Control device for drilling a bore hole |
| 04/07/1999 | CN1213423A Device for drilling bore hole in the ground |
| 04/06/1999 | US5892176 Smooth surfaced fiber optic logging cable for well bores |
| 04/06/1999 | US5890552 Superabrasive-tipped inserts for earth-boring drill bits |
| 04/01/1999 | WO1999015757A1 Floating cushion sub |
| 03/31/1999 | EP0904478A1 Drilling apparatus |
| 03/30/1999 | US5888025 Coupling for tie rods |
| 03/30/1999 | US5887668 Wellbore milling-- drilling |
| 03/30/1999 | US5887659 Riser for use in drilling or completing a subsea well |
| 03/30/1999 | US5887657 Pressure test method for permanent downhole wells and apparatus therefore |
| 03/30/1999 | US5887654 Method for performing downhole functions |
| 03/30/1999 | CA2120788C Drill string shock absorber |
| 03/25/1999 | WO1999014462A1 Riser installation method and riser system |
| 03/25/1999 | DE19737535A1 Pipe connection with seal and pressure-transfer ring |
| 03/24/1999 | CN2311599Y Sucker rod disconnecting and connecting device |
| 03/23/1999 | CA2149591C Method and apparatus for downhole sand clean-out operations in the petroleum industry |
| 03/18/1999 | WO1999013198A1 Close proximity wellheads |
| 03/18/1999 | WO1999013194A1 Gage pad arrangements for rotary drill bits |
| 03/18/1999 | WO1999013193A1 Rock drill and method for manufacturing said rock drill |
| 03/18/1999 | WO1999013125A1 A device, a drill member and a method for masking the member at thermo chemical surface treatment |
| 03/18/1999 | DE19754764C1 Drive cylinder for underground pipe tunnel |
| 03/18/1999 | CA2303332A1 A device, a drill member and a method for masking the member at thermo chemical surface treatment |
| 03/18/1999 | CA2302492A1 Rock drill and method for manufacturing said rock drill |
| 03/18/1999 | CA2247644A1 Apparatus for measuring and recording data from boreholes |
| 03/17/1999 | EP0901560A1 Apparatus and a method for drilling boreholes |
| 03/17/1999 | EP0901558A1 Sectional drive system |
| 03/17/1999 | EP0835360B1 Hydraulic thruster for use in a drill string |
| 03/17/1999 | CN2310857Y 抽油杆柱 Sucker rod |
| 03/16/1999 | US5881815 Drilling, production, test, and oil storage caisson |
| 03/16/1999 | US5881810 Centralizer |
| 03/10/1999 | EP0900918A2 Method and apparatus for suppressing drillstring vibrations |
| 03/10/1999 | EP0900913A1 Drillstring |
| 03/10/1999 | EP0900912A2 Drill pipe and method for making the same |
| 03/10/1999 | EP0900318A1 Stabiliser for borehole drilling apparatus |
| 03/10/1999 | EP0900317A1 Apparatus and method for downhole drilling communications |
| 03/10/1999 | EP0683845B1 Drill pipe |
| 03/10/1999 | CN2310149Y Lock block type decoupling device |
| 03/10/1999 | CN2310148Y Multi-function completedwell limb for horizontal well |
| 03/09/1999 | US5878825 Underground propelling method |
| 03/04/1999 | WO1999010674A1 An apparatus and a method for mounting a coherent conduit in a groove in a pipe string |
| 03/04/1999 | DE19738171A1 Boring machine with driving slide on guide column |
| 03/03/1999 | EP0899421A2 Method of suspending an electric submergible pump within a wellbore |
| 03/03/1999 | EP0898638A1 Washpipe stabilisation |
| 03/03/1999 | EP0898637A1 Slip joint |
| 03/03/1999 | EP0724682B1 Tool for maintaining wellbore penetration |
| 03/03/1999 | CN1209858A Method for forming window in tubular and apparatus for use in said method |
| 03/02/1999 | US5875858 Low volume air-water drilling systems and methods |
| 03/02/1999 | US5875852 Apparatus and associated methods of producing a subterranean well |
| 03/02/1999 | US5875848 Weight management system and method for marine drilling riser |
| 03/02/1999 | US5875728 Spar platform |
| 02/25/1999 | WO1999008831A1 Substrate facing method, body and kit |
| 02/25/1999 | WO1998053176A3 Marine riser |
| 02/24/1999 | EP0898047A2 Stress relieving joints for pipes |
| 02/24/1999 | EP0898046A2 Method and apparatus for releasably connecting a wireline to a downhole tool |
| 02/24/1999 | EP0897502A1 Tubing connector |
| 02/24/1999 | EP0897456A2 Multi-lateral wellbore systems and methods for forming same |
| 02/24/1999 | CN2308706Y Integrally weaving corrector |
| 02/24/1999 | CN2308705Y Oil pumping rod |
| 02/24/1999 | CN1209103A System for prodn. of hydrocarbons |
| 02/24/1999 | CN1209102A System for anchoring ships |
| 02/24/1999 | CN1209101A System for loading ships at sea |
| 02/24/1999 | CN1208807A Device for transferring fluid between equipment on seabed and surface unit |
| 02/23/1999 | US5873677 For use with pipe in floating systems |
| 02/23/1999 | US5873416 In an offshore structure designed to drill for/produce hydrocarbons |
| 02/23/1999 | US5873157 Field installable rod guide and method |
| 02/18/1999 | WO1999008034A1 Tubular connection |
| 02/18/1999 | WO1999007978A1 Improvements in pipe section protecting means |
| 02/18/1999 | WO1998038411A3 Apparatus for use in drilling operations |
| 02/16/1999 | CA2150095C Drill bit reamer stabilizer |
| 02/16/1999 | CA2060445C Downhole adjustable stabilizer |
| 02/11/1999 | WO1999006194A2 Rotary spade drill arrangement |
| 02/11/1999 | WO1999006193A2 Rotary drill arrangement |
| 02/11/1999 | DE19734140A1 Hammer boring machine striking function boring tool |
| 02/09/1999 | US5868523 For in-situ remediation of contaminated soil and ground water |
| 02/09/1999 | US5868212 Stabiliser tool |