| Patents for E21B 19 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (17,198) |
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| 09/24/1997 | EP0796386A1 Arrangement for mounting swing cylinders in boom for rock drilling unit |
| 09/23/1997 | US5669653 Fluid powered backup tong and method |
| 09/16/1997 | US5667026 Positioning apparatus for a power tong |
| 09/10/1997 | EP0794315A1 Device for drilling in soil |
| 09/09/1997 | US5664606 Drill pipe having concave wrenching recesses |
| 09/09/1997 | US5664310 Combination power and backup tong support and method |
| 09/04/1997 | WO1997031757A1 Dual string backup tong |
| 09/03/1997 | EP0792996A1 Apparatus for coupling a pipe string with a service for making earth bore holes |
| 09/03/1997 | EP0591157B1 Improved torque transfer apparatus |
| 09/02/1997 | US5662312 Pressurized sheave mechanism for high pressure wireline service |
| 09/02/1997 | US5662176 Truck mounted work implement |
| 09/02/1997 | US5661888 Apparatus and method for improved oilfield connections |
| 08/27/1997 | EP0791721A1 Apparatus and method for drilling with a flexible shaft |
| 08/27/1997 | EP0791719A1 Gripper block for coiled tubing injectors |
| 08/26/1997 | US5660235 Method and a device for use in coil pipe operations |
| 08/26/1997 | US5660087 Drill pipe spinner |
| 08/21/1997 | WO1997029944A1 Flexible risers with stabilizing frame |
| 08/20/1997 | EP0536256B1 Radially deformable tube consisting of several releasably connected sections |
| 08/19/1997 | US5658095 Riser tensioner system for use on offshore platforms using elastomeric pads or helical metal compression springs |
| 08/14/1997 | WO1997029269A1 Support of a combined feed-out/feed-in device for a coilable tubing |
| 08/14/1997 | DE19605139A1 Clamping unit which grips casing or drilling tubes used in deep, concreted civil engineering work |
| 08/14/1997 | CA2246261A1 Support of a combined feed-out/feed-in device for a coilable tubing |
| 08/14/1997 | CA2175267A1 Assembly and method for hanging elongated tubing in well bore |
| 08/07/1997 | WO1997028347A1 Arrangement for fastening a piston-cylinder arrangement and method for replacing sealings therein |
| 08/07/1997 | WO1997021902A3 Drilling rig |
| 08/07/1997 | CA2244772A1 Arrangement for fastening a piston-cylinder arrangement and method for replacing sealings therein |
| 08/05/1997 | US5653297 Blasthole drill with improved automatic breakout wrench |
| 08/05/1997 | US5653290 Rotating rod string position adjusting device |
| 07/30/1997 | CN2258534Y Split oil rod clamping holder |
| 07/30/1997 | CN1155865A Toggled breakout wrench |
| 07/24/1997 | WO1997026435A1 Arrangement for leading flexible elements to a rock drill, and a hose reel structure |
| 07/23/1997 | EP0701531A4 Apparatus for gripping a down hole tubular |
| 07/23/1997 | EP0630440A4 Slip-type gripping assembly. |
| 07/17/1997 | WO1997025516A1 Rock and earth drilling aggregate for rotary drilling |
| 07/17/1997 | CA2214680A1 Rock and earth drilling aggregate for rotary drilling |
| 07/15/1997 | US5647443 Method and device for drilling for oil or gas |
| 07/10/1997 | WO1997024507A1 Stretch compensation in a hoisting system for a derrick |
| 07/10/1997 | DE3890753C2 Compact high-torque device for rotating pipe |
| 07/08/1997 | US5645269 Sheave cable guarding and guiding device |
| 07/08/1997 | US5645131 Device for joining threaded rods and tubular casing elements forming a string of a drilling rig |
| 07/03/1997 | WO1997023706A1 Apparatus and method for raising and lowering a piston in a piston-cylinder arrangement in a derrick |
| 07/03/1997 | WO1997023705A1 Arrangement in connection with a yoke in a hoisting system for a derrick |
| 07/03/1997 | DE19538250A1 Method of laying water pipelines |
| 07/03/1997 | CA2240659A1 Arrangement in connection with a yoke in a hoisting system for a derrick |
| 07/02/1997 | EP0781368A1 A device for coil tubing operations |
| 07/01/1997 | US5642786 Securing and tensioning device for a towing cable connected to a percussion boring machine |
| 06/24/1997 | US5641248 Variable spring rate compression element and riser tensioner system using the same |
| 06/19/1997 | WO1997021902A2 Drilling rig |
| 06/17/1997 | US5638911 For use with a vehicle |
| 06/17/1997 | US5638904 Within wells |
| 06/12/1997 | DE19542091C1 Bore sample extraction device |
| 06/11/1997 | EP0777815A1 Arrangement in boom for rock drilling unit |
| 06/11/1997 | EP0777814A1 Arrangement for controlling boom for rock drilling unit |
| 06/10/1997 | US5637806 Procedure for evaluating the friction characteristics of a shouldered threaded connection |
| 06/10/1997 | US5636699 Mobile hauling vehicle |
| 05/20/1997 | US5630477 Downcrowdable telescopic augering apparatus |
| 05/15/1997 | WO1997017171A1 Hydraulic backup tong |
| 05/14/1997 | EP0772729A1 Arrangement in a hydraulically operated rock drilling equipment |
| 05/13/1997 | US5628586 Elastomeric riser tensioner system |
| 05/09/1997 | CA2162409A1 Tubing tightener |
| 05/07/1997 | EP0771389A2 Toggled breakout wrench |
| 05/07/1997 | EP0711377B1 Jaw clamp for a mechanical or hydraulic rod lifter |
| 04/30/1997 | DE19538557A1 Process to replace buried gas or water supply pipes in sections |
| 04/24/1997 | WO1997014867A1 A method and a device for hauling a casing or the like up from a borehole and for inserting the same down into a borehole |
| 04/24/1997 | CA2235165A1 A method and a device for hauling a casing or the like up from a bore hole and for inserting the same down into a bore hole |
| 04/23/1997 | CN2252879Y Spiral teeth polish rod clamp |
| 04/22/1997 | US5622232 Blasthole drill with drill-through pipe rack |
| 04/17/1997 | WO1997013953A1 Portable well service rig |
| 04/17/1997 | WO1997013618A1 Improved back-up power tongs |
| 04/16/1997 | CN1034599C Crawling device |
| 04/06/1997 | CA2186827A1 Fluid powered backup tong and method |
| 04/03/1997 | WO1997012166A1 Composite spoolable tube |
| 04/03/1997 | CA2687548A1 Composite spoolable tube |
| 03/20/1997 | WO1997010411A1 A method and a device for use in coil pipe operations |
| 03/20/1997 | DE19534696A1 Introducing measuring instruments into horizontal or sloping borehole |
| 03/19/1997 | CN2249821Y Tower-rocker-arm above-setting two action long range oil sucker |
| 03/12/1997 | EP0760899A1 Top entry apparatus and method for a drilling assembly |
| 03/12/1997 | EP0694112B1 Rock drill |
| 03/11/1997 | US5609457 Pipe alignment apparatus for use on wellhead derrick |
| 03/11/1997 | US5609226 Slip-type gripping assembly |
| 03/05/1997 | EP0542876B1 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 03/04/1997 | US5607280 Apparatus for loading pipe onto a machine |
| 02/26/1997 | CN1143548A Method for manufacturing cylinder tooth bit of cast steel and ductile iron |
| 02/13/1997 | WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 02/11/1997 | US5601163 Automatic adjuster for brake calipers |
| 02/11/1997 | US5601148 Arrangement for measuring the position of a feed beam in a rock drilling apparatus and/or measuring the position of a rock drill |
| 02/06/1997 | WO1997004211A1 Lightweight intervention system |
| 02/04/1997 | US5598866 Portable well testing apparatus |
| 02/04/1997 | CA2168651C Improved slick line system with real-time surface display |
| 01/21/1997 | US5595248 Pipe alignment apparatus |
| 01/21/1997 | CA2065394C Friction grip for tubular goods |
| 01/16/1997 | WO1996028633A3 Universal pipe injection apparatus for wells and method |
| 01/15/1997 | CN1140229A Propelling system for hydraulic jumbo |
| 01/14/1997 | US5592993 Directional auger attachment |
| 01/09/1997 | WO1997001019A1 Arrangement for a telescope feeder of a rock-drilling machine |
| 01/09/1997 | WO1997001017A1 Insulated and/or concentric coiled tubing |
| 01/08/1997 | EP0644978B1 Apparatus for connecting and disconnecting threaded members |
| 01/08/1997 | CN2244610Y Light oil pipe lead tongs |
| 01/08/1997 | CN2244609Y Electric hydraulic power unit for hydraulic socket wrench |
| 01/07/1997 | US5590867 Blowout preventer for coiled tubing |