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 3 - Rotary drilling
Patents for E21B 3 - Rotary drilling (4,061)
10/1992
10/28/1992CN1065714A Under ground construction method and device for laying pipe line
10/23/1992CA2066967A1 Diamond chuck jaw and carrier assembly
10/20/1992CA1309084C Drive head apparatus for a rock boring machine
10/14/1992CN2118804U Drilling rig for mountainous region
10/07/1992EP0506919A1 Motorized swivel provided with a dynamometric measurement unit.
10/07/1992CN2118145U All electronic-control top driven device of drilling well
09/1992
09/30/1992EP0365612B1 Drill
09/17/1992DE4107834A1 Hollow displacement auger - has drive shaft extending longitudinally through its centre, with pointed tip, and has anti-buckling discs fitted at intervals along drive shaft, requiring minimum torque for control
09/16/1992CN1064521A Rotary punching and gripping borer
09/12/1992CA2037946A1 Horizontal auger for skidsteer tractors and the like
08/1992
08/19/1992CN2113332U Unit assemblage apparatus for threaded rod drill set motor
07/1992
07/07/1992US5127765 System for in-situ treatment of underwater contaminated material
06/1992
06/03/1992CN1061637A Hole-making rock drilling construction technology with diving electric drill to take rock core
06/02/1992CA1302391C Compact casing tongs for use on top head drive earth drilling machine
05/1992
05/13/1992EP0484672A1 Submersible pneumatic drilling unit
05/10/1992CA2054925A1 Submersible pneumatic drilling unit
04/1992
04/30/1992WO1992007189A1 Device for orienting rotor blades in a transverse fluid flow and applications
04/29/1992CN2102999U Drilling maching without transmission rod
04/28/1992US5107941 Kelly saver drive
04/28/1992US5107940 Top drive torque restraint system
04/21/1992US5105687 Built-in rack apparatus
04/21/1992CA1299166C Internal wrench for a top head drive assembly
04/20/1992WO1992007162A1 Motorized swivel provided with a dynamometric measurement unit
04/15/1992CN2101737U Roller type drilling core
04/09/1992DE4038424C1 Kelly borehole drilling arrangement - involves telescopically nested pipes connected to drill head
04/09/1992DE4031688A1 Mobile drill for hollow auger drilling - consists of drill rig mounted on back of commercial vehicle and has swinging mast
04/09/1992DE4031687A1 Small drill incorporated in vertical frame - is mounted on two-wheel chassis and has hollow auger operated by system of steel cables and windlasses
04/08/1992CN1016205B Drill
03/1992
03/18/1992CN2099185U Efflorescent rock drilling machine for agricuture
03/03/1992US5092411 Drilling apparatus
02/1992
02/04/1992US5085280 Drill rig shut-off system
12/1991
12/27/1991CA2045746A1 Built-in rack apparatus
12/18/1991EP0461512A2 Apparatus for supporting a direct drive drilling unit in a position offset from the centerline of a well
11/1991
11/12/1991US5064003 Hydraulic drilling machine
11/05/1991US5062490 Kelly bar coupling
10/1991
10/23/1991CN1055572A Labour-saving short drilling rig
10/09/1991CN2086300U True soil drilling machine
09/1991
09/24/1991US5050691 Detachable torque transmitting tool joint
09/10/1991CA1288762C Arrangement for supporting of an axial bearing of a drilling machine
08/1991
08/13/1991US5038871 Apparatus for supporting a direct drive drilling unit in a position offset from the centerline of a well
08/07/1991EP0439600A1 Drill.
08/06/1991US5036927 Drilling machine
07/1991
07/31/1991CN2081879U Braking block for drilling machine
07/30/1991US5035292 Whipstock starter mill with pressure drop tattletale
07/23/1991US5033554 Well point placement and removal apparatus
07/09/1991US5029655 Drilling machine for drilling large drilling holes in rock, particularly underground
05/1991
05/02/1991DE3934992A1 High safety design of hand drill - has low moment of inertia as lightweight alloy casing contg. body with compressed air motor and rotors made of laminated wood
04/1991
04/18/1991WO1991005131A1 Actuating device
04/17/1991EP0423055A2 Detachable torque transmitting tool joint
04/17/1991CN2075254U Miniature door frme type well drill for agriculture
04/10/1991CN2074807U Drilling machine gearing system
04/09/1991US5005656 Device in impact machines
03/1991
03/13/1991CN2073025U Light earthquake driller
03/07/1991WO1991002880A1 Drill
02/1991
02/28/1991DE3927952A1 Drilling for blasting - uses cradle and washing nozzle together with carriage mounted drive and hydraulic hammer
02/27/1991CN2072147U High-efficient light well driller
02/12/1991US4991669 Device for controlling the passage of a flushing medium in impact machines
01/1991
01/15/1991US4984936 Stopper apparatus for rotary reaction force
01/15/1991US4984641 Swivels
01/10/1991DE3920392A1 Verfahren zum abbau und zur foerderung einer unter wasser lagernden bodenschicht und vorrichtung zur durchfuehrung des verfahrens A method for degrading and foerderung a ground layer overlying underwater and apparatus for performing the method
01/01/1991US4981180 Oil wells
12/1990
12/11/1990US4976321 Horizontal earth boring machine and method
11/1990
11/28/1990CN2066489U Miniature hand tractor type well drilling machine
11/20/1990US4971158 Method in rotary drilling and rotary drilling apparatus
11/06/1990US4968101 Vertical asphalt and concrete miller
09/1990
09/12/1990EP0387218A1 Device in impact machines
09/12/1990EP0387217A1 Device in impact machines
08/1990
08/30/1990DE3905596A1 Mobile drilling rig
08/22/1990EP0383225A1 Device for the detachable connection of a rotary table to a drill pipe
08/09/1990DE3903050A1 Drilling unit
08/01/1990CN2059935U Screw extruding drilling tool
06/1990
06/13/1990CN1008382B Pile driver, pile drawer and/or drilling machine
05/1990
05/02/1990EP0365612A1 Drill.
04/1990
04/04/1990CN2055529U Well driller
04/04/1990CN1007440B Countercycle drilling method with pump and its apparatus
02/1990
02/06/1990CA1265601A1 Programmed automatic drill control
01/1990
01/31/1990CN2052040U Drilling machine attached to the small tractor
01/24/1990EP0351694A2 Stopper apparatus for rotary reaction force
01/03/1990CN1006318B Arrangement for supporting of axial bearing of drilling machine
01/02/1990US4890681 Method and apparatus for rotary power driven swivel drilling
12/1989
12/26/1989US4889193 Rotary drill guard assembly and method
11/1989
11/23/1989EP0342949A1 Top drive torque reactor
11/07/1989US4878546 Self-aligning top drive
11/02/1989WO1989010465A1 Hydraulic drilling machine
11/01/1989CN1036811A Drill
10/1989
10/31/1989US4877094 Rock drilling machine, especially for underground mining
10/31/1989US4877093 Spring actuated power swivel support rollers
10/24/1989US4875529 Alternate forms of, side drive drilling
10/10/1989US4872518 Power chainsaw-ice auger conversion apparatus
10/10/1989US4872517 Rotatable fluid conductor for well apparatus
09/1989
09/21/1989WO1989008769A1 Drill
09/19/1989US4867236 Compact casing tongs for use on top head drive earth drilling machine
09/12/1989US4865135 Top drive torque reactor
08/1989
08/30/1989CN1035154A Penetrating process for clay layer below groundwater level with long spiral drill
08/29/1989US4860837 Rotary and reciprocating drilling machine
08/10/1989WO1989007188A1 A drilling rig and a supporting frame
08/08/1989US4854395 Hydraulic kelly bar chuck
08/08/1989US4854383 Manifold arrangement for use with a top drive power unit
07/1989
07/19/1989CN2041358U Collision avoiding controller for crown blocks of drilling-machine
07/11/1989US4846289 Arrangement for supporting of an axial bearing of a drilling machine
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