Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 7 - Special methods or apparatus for drilling
Patents for E21B 7 - Special methods or apparatus for drilling (22,064)
12/1980
12/30/1980US4241796 Active drill stabilizer assembly
12/30/1980CA1092377A1 Skirt construction
12/23/1980US4240513 Drill bit with suction jet means
12/23/1980US4240512 Arrangement for guiding a bore-crown or bit along a given path
12/23/1980US4240511 Drilling machine centering arrangement
12/23/1980US4240506 Downhole riser assembly
12/23/1980CA1092090A1 Means and method for drilling rock
12/16/1980US4239087 Drill bit with suction jet means
12/11/1980WO1980002717A1 Method and device for earth-rock probing and rock drilling by a percussion drill
12/09/1980CA1091220A1 Bore tool with jet exhauster
11/1980
11/27/1980WO1980002582A1 Variable angle directional drilling sub
11/18/1980US4234046 Pressure differential seafloor corer-carrier
11/12/1980EP0018391A1 Apparatus for automatic bolting in rock reinforcement.
11/11/1980US4232850 Drill boom arrangement
11/11/1980US4232849 Drill boom arrangement
11/11/1980US4232848 Drill boom arrangement
11/11/1980US4232752 Method and apparatus for driving pipe
11/11/1980US4232625 Column stabilized semisubmerged drilling vessel
11/11/1980CA1089438A1 Rock drill positioning mechanism
11/04/1980US4231436 Marine riser insert sleeves
11/04/1980US4231429 Lateral tensioning system for riser pipe
11/04/1980US4231283 Pulsating liquid jet gun and method of operating the same
10/1980
10/28/1980US4230191 Machine for making underground excavations
10/28/1980US4230189 Drilled hole end adjusting arrangement
10/21/1980US4228863 Reamer bit for raise boring
10/21/1980US4228862 Apparatus for drilling holes in the ground
10/21/1980US4228857 Floating platform well production apparatus
10/15/1980EP0017518A1 Rotary drilling machine and drilling method using this machine
10/14/1980US4227584 Downhole flexible drive system
10/14/1980US4227583 Method and apparatus for sinking shafts
10/14/1980US4227582 Well perforating apparatus and method
10/14/1980CA1087640A1 Surface drilling apparatus
10/07/1980US4226559 Rock bolting apparatus
10/07/1980US4226288 Side hole drilling in boreholes
10/07/1980CA1087165A1 Means for drilling
10/01/1980EP0016717A1 Articulated supporting arm for the feed bar of a drilling apparatus
09/1980
09/23/1980US4223870 Bailer for top head drive rotary well drills
09/23/1980US4223737 Method for well operations
09/23/1980CA1086300A1 Variable speed auger for use with a skid steer vehicle
09/23/1980CA1086295A1 Arrangement for guiding a bore-crown or bit along a given path
09/09/1980US4221504 Stabilization of subsea riser pipes having free lower ends
09/09/1980US4221503 Drilling method and apparatus for large diameter pipe
09/09/1980US4221271 Water jet cutting nozzle transition section
09/09/1980US4221157 Pneumatically operated percussion boring apparatus
09/03/1980EP0015137A1 Apparatus for directional drilling
09/02/1980US4220214 Directional drilling sub
09/02/1980US4220213 Method and apparatus for self orienting a drill string while drilling a well bore
08/1980
08/26/1980US4219087 Enlarged bore hole drilling method
08/26/1980CA1084368A1 Multiorifice structure and method of making same
08/26/1980CA1084359A1 Reversible percussive device for ground perforation
08/19/1980US4217709 Submarine sand sampler
08/19/1980CA1084042A1 Turbodrill
08/19/1980CA1083838A1 Method and apparatus for installing an offshore pile driving rig
08/12/1980US4216906 Method of making high velocity liquid jet
08/12/1980US4216835 System for connecting an underwater platform to an underwater floor
08/12/1980US4216834 Connecting assembly and method
08/05/1980US4215950 Tensioner device for offshore oil production and exploration platforms
08/05/1980US4215544 Method of generating rotary power in a deepsea environment
08/05/1980CA1083135A1 Two stage large diameter drill bit
08/05/1980CA1083134A1 Means and method of forming and enlarging holes in soil
07/1980
07/29/1980US4214639 Suspended drilling system
07/22/1980US4213720 Tensioning of members
07/15/1980US4212358 Posthole digging apparatus
07/08/1980US4211292 Borehole angle control by gage corner removal effects
07/08/1980CA1081205A1 Method and apparatus for anchoring whipstocks in weel bores
07/01/1980CA1080690A1 Raise drill
06/1980
06/24/1980CA1080210A1 Implement, consisting of a trolley with an upright ground-preparation or compacting tool
06/24/1980CA1080120A1 Method and apparatus for laser treatment of geological formations
06/10/1980US4207016 Method and apparatus for supporting the wall of an upwardly excavated shaft
06/03/1980CA1078881A1 Advance method and apparatus for mining
06/03/1980CA1078819A1 Reamer bit for raise boring
06/03/1980CA1078818A1 Raise drill with removable stem
06/03/1980CA1078815A1 Tilt preventing system for drills
05/1980
05/29/1980WO1980001091A1 Device for making drillings into the rock,soil,etc
05/29/1980WO1980001087A1 Earth auger
05/28/1980EP0011287A1 Down-the-hole drill for rock, earth or the like
05/27/1980US4205362 Apparatus for moving along or through a material
05/27/1980US4204715 Method and device for breaking a hard compact material
05/27/1980CA1078369A1 Device whereby a duct in a deep bore hole is supported and moved up or down by reaction against the bore hole surface
05/14/1980EP0011056A1 Drill rig having a device for setting the direction and/or the inclination of the rock drill
05/13/1980US4202417 Raise drill with elastomeric load absorbing means
05/13/1980US4202416 Method and apparatus for sinking a cased borehole for producing cased pile foundations
05/13/1980CA1077530A1 Drill units for drilling and charge laying operations and method of carrying out the operations
05/13/1980CA1077386A1 Thermal torch and method
05/06/1980CA1077019A1 Raise drill inner yoke bridge
05/06/1980CA1076820A1 Method and apparatus for drilling a hole in a body of ice and for the destruction of a body of ice
04/1980
04/29/1980CA1076655A1 Underwater cutting rod
04/22/1980US4199034 Method and apparatus for perforating oil and gas wells
04/16/1980EP0009639A2 Multi-purpose mobile drill rig
04/15/1980CA1075491A1 Device for taking bottom soil samples from deep water basins
04/08/1980US4196783 Device for boring
04/08/1980US4196781 Telescoping joint
04/08/1980CA1075225A1 Downcrowding boom assembly
04/01/1980US4195701 Raise drill having water passages directed toward the roller cutters
04/01/1980US4195698 Machine for driving vertical members
04/01/1980CA1074584A1 Preventing freeze-up of ice holes
03/1980
03/25/1980US4194580 Drilling technique
03/25/1980US4194578 Raise boring head with retractable gage cutters
03/25/1980US4194568 Disconnectable riser columns for under water oil wells
03/18/1980US4193635 Controlled cavitation erosion process and system
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