| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/22/1988 | US4732227 Equipment for continuous hole drilling in soil |
| 03/22/1988 | US4732226 Drilling machine |
| 03/22/1988 | US4732223 Controllable downhole directional drilling tool |
| 03/22/1988 | US4732222 Ram boring machine with impact blade piston |
| 03/22/1988 | CA1234385A2 Downhole drive apparatus |
| 03/16/1988 | EP0260143A2 Method and apparatus for installing marine silos |
| 03/15/1988 | USRE32623 Curved offshore well conductors |
| 03/15/1988 | CA1234167A1 Earth boring apparatus |
| 03/15/1988 | CA1234096A1 Spherical bit |
| 03/10/1988 | WO1988001677A1 Process and device for producing drilling holes from an angled position in relation to the drilling axes |
| 03/09/1988 | CN87207319U Drilling rig for bending holes |
| 03/08/1988 | US4729694 TLP marine riser tensioner |
| 03/08/1988 | US4729438 Stabilizer for navigational drilling |
| 03/02/1988 | EP0257744A2 Drilling system |
| 03/01/1988 | US4728152 Borehole extraction of minerals |
| 02/24/1988 | EP0256796A2 Method and apparatus for controlled directional drilling of boreholes |
| 02/24/1988 | EP0256601A1 Method and device for making a hole in the ground |
| 02/24/1988 | CN87100905A Sealing and torsion-reducing device for under-water dill |
| 02/23/1988 | US4726711 Process and apparatus to form an underground passage or space |
| 02/23/1988 | CA1233167A1 Supporting arrangement for a feed device for a rock drilling machine |
| 02/23/1988 | CA1233035A1 Laying a pipeline in arctic offshore waters |
| 02/17/1988 | CN87201617U Straight rod and stuffing box for oil well |
| 02/17/1988 | CN87100584A Insitu hazardous waste treating apparatus and method of using same |
| 02/16/1988 | CA1232898A1 Slant service rig |
| 02/11/1988 | WO1988001012A1 Control unit for underground excavators |
| 02/11/1988 | WO1988001007A1 Enhanced circulation drill bit |
| 02/10/1988 | EP0255666A2 Finned impact operating boring tool |
| 02/09/1988 | US4723873 Method and device for preparing an existing buried conduit for replacement by a new conduit |
| 02/09/1988 | CA1232621A1 Process and apparatus for cutting rock |
| 02/02/1988 | US4722397 Well completion process using a polymer gel |
| 02/02/1988 | CA1232145A1 Conductor guide system for offshore drilling platform |
| 01/19/1988 | US4720211 Apparatus for replacing mains |
| 01/19/1988 | US4719977 Method of drilling deviated wellbores |
| 01/14/1988 | WO1988000273A1 Riser tensioner |
| 01/14/1988 | DE3622934A1 Drill tool of compact design |
| 01/13/1988 | EP0252528A2 Improved drilling method and apparatus |
| 01/13/1988 | EP0162878B1 Improvements in pipe laying and replacement |
| 01/12/1988 | US4718504 Trench excavator |
| 01/07/1988 | EP0251607A2 Sewer renovation |
| 01/07/1988 | EP0251543A2 Downhole stabilisers |
| 01/07/1988 | EP0250526A1 Soil displacement hammer. |
| 01/05/1988 | US4716849 Erosive-jet diver tool |
| 01/05/1988 | CA1230979A1 Rotary cutter for cable following apparatus |
| 12/29/1987 | US4715538 Swirl jet nozzle as a hydraulic work tool |
| 12/29/1987 | US4715455 Drill shoe |
| 12/29/1987 | US4715454 Mechanical directional drilling jar with swivel means |
| 12/29/1987 | US4715453 Drilling deviation control tool |
| 12/29/1987 | US4715452 Method of drilling a directonal well bore |
| 12/29/1987 | US4715128 Curvature probe and method |
| 12/23/1987 | EP0250069A2 A deepwater floating drilling and production facility incorporating flexible production risers |
| 12/22/1987 | US4714118 Technique for steering and monitoring the orientation of a powered underground boring device |
| 12/17/1987 | DE3715280A1 Soil sampler |
| 12/15/1987 | US4712624 Rock drill with tunnel profile control system |
| 12/15/1987 | CA1230325A1 Drill arrangement |
| 12/09/1987 | EP0248316A2 Mechanical directional drilling jar |
| 12/08/1987 | US4711310 For a drilling machine |
| 12/08/1987 | US4711309 Drilling apparatus |
| 12/08/1987 | CA1230023A1 Reversible percussive action machine |
| 12/05/1987 | CN86209909U Pumping up anti-circulation drill suitable for hydrographic and water well drilling |
| 12/03/1987 | WO1987007322A1 Apparatus for correcting irregularities in or enlarging an underground duct |
| 12/02/1987 | EP0247799A1 Method of and apparatus for providing an underground tunnel |
| 12/02/1987 | EP0247767A2 Method and apparatus for controlling the direction of a down-hole percussion drilling tool |
| 12/02/1987 | EP0247125A1 Improvements in directional drilling of a drill string. |
| 11/25/1987 | EP0246886A1 Method of and apparatus for locating a discrete inground boring device |
| 11/25/1987 | EP0246865A2 Method of and apparatus for providing an underground tunnel |
| 11/24/1987 | US4708525 Multiterminators for riser pipes |
| 11/24/1987 | US4708211 Reversible air-operated percussive action machine for driving holes in the ground |
| 11/19/1987 | EP0245971A2 Hydraulic drilling apparatus and method |
| 11/19/1987 | EP0245892A2 Apparatus for vibrating a pipe string in a borehole |
| 11/17/1987 | CA1229268A1 Machine for driving holes in the ground |
| 11/10/1987 | US4705120 Drilling machine |
| 11/10/1987 | US4705116 Mole with rotary vibrator |
| 11/05/1987 | WO1987006638A1 Device for making holes in ground |
| 11/04/1987 | EP0244317A1 Device for drilling wells with lateral branches |
| 11/04/1987 | EP0243401A1 System and method for controlled directional drilling |
| 11/03/1987 | US4703813 Cementing portion of conductor string |
| 11/03/1987 | US4703812 Mobile drilling apparatus |
| 11/03/1987 | US4703811 Drilling and/or lifting machine |
| 11/03/1987 | CA1228803A1 Method for forming a gravel packed horizontal well |
| 10/31/1987 | CN86207342U Small drilling rig fixed on engineering vehicles |
| 10/28/1987 | EP0242638A1 Boring tool |
| 10/28/1987 | CN87103112A Countercycle drilling method with pump up and its apparatus |
| 10/27/1987 | US4702325 Apparatus and method for driving casing or conductor pipe |
| 10/27/1987 | CA1228639A1 Method for the magnetization of well casing |
| 10/22/1987 | WO1987006300A1 Improvements in drilling using downhole drilling tools |
| 10/22/1987 | DE3612762A1 Telescopic drilling implement |
| 10/22/1987 | DE3610792A1 Electrohydraulic control for a casing machine for cased bores in the ground |
| 10/21/1987 | EP0242307A1 Device for the under water drilling of foundations |
| 10/20/1987 | US4700788 Directional drilling pipelay |
| 10/15/1987 | DE3626755A1 Method and apparatus for producing a blind shaft or large mine opening |
| 10/15/1987 | DE3448158C2 Roll-correction device on a driving apparatus for the underground jacking of piping sections with inaccessible nominal pipe diameters |
| 10/14/1987 | EP0241354A1 Device for simultaneously drilling and casing |
| 10/14/1987 | EP0240672A1 Digging and transporting device of a driving apparatus for pipelines being operated subterraneously |
| 10/13/1987 | US4699429 For boring a hole in a coal seam |
| 10/13/1987 | US4699224 Method and apparatus for lateral drilling in oil and gas wells |
| 10/13/1987 | US4699222 Method and apparatus for penetrating ice |
| 10/13/1987 | CA1228064A1 Pipe propelling device |
| 10/08/1987 | DE3610853A1 Drilling tool |
| 10/08/1987 | DE3610814A1 Mobile drilling, piling or suchlike rig |
| 10/06/1987 | US4698570 Boom positioning apparatus for rock drill |