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
More topics under "E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells" (324,830)
E21B 1 - Percussion drilling (2,080)
E21B 10 - Drill bits (19,464)
E21B 11 - Other drilling tools (454)
E21B 12 - Accessories for drilling tools (993)
E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619)
E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
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)
E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712)
E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102)
E21B 27 - Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits (1,068)
E21B 28 - Vibration generating arrangements for boreholes or wells, e.g. for stimulating production (888)
E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744)
E21B 3 - Rotary drilling (4,061)
E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788)
E21B 33 - Sealing or packing boreholes or wells (33,564)
E21B 34 - Valve arrangements for boreholes or wells (14,685)
E21B 35 - Methods or apparatus for preventing or extinguishing fires (324)
E21B 36 - Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones (4,262)
E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
E21B 4 - Drives for drilling, used in the borehole (6,032)
E21B 40 - Tubing catchers, automatically arresting the fall of oil-well tubing (79)
E21B 41 - Equipment or details not covered by groups (7,984)
E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
E21B 44 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions (5,356)
E21B 45 - Measuring the drilling time or rate of penetration (257)
E21B 47 - Survey of boreholes or wells (31,352)
E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875)
E21B 6 - Drives for drilling with combined rotary and percussive action (930)
E21B 7 - Special methods or apparatus for drilling (22,064)
Patents for E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (2,021)
10/1991
10/23/1991EP0452397A1 Wireline releasing device and method of releasing wireline
09/1991
09/05/1991WO1991013233A1 Releasable hydraulic and/or electric connection for subsea equipment
08/1991
08/21/1991CA2076008A1 Releasable hydraulic and/or electric connection for subsea equipment
08/14/1991EP0440747A1 Drilling mud separation system
08/10/1991CA2034625A1 Earth boring bit with axially radiussed roller bearing race
07/1991
07/30/1991WO1991011587A1 Method and apparatus for sealing pipe perforations
07/30/1991CA2049974A1 Method and apparatus for sealing pipe perforations
07/24/1991CN1053278A Well casing flotation device and method
07/16/1991US5031699 Method of casing off a producing formation in a well
07/10/1991EP0409880A4 Actuator and communication system
06/1991
06/29/1991CA2012119A1 Collet type connector
05/1991
05/30/1991WO1991007566A1 Converter
05/30/1991CA2073017A1 Converter
04/1991
04/10/1991EP0421037A1 Hydraulic/torsion packoff installation tool and method of using same
04/07/1991CA2021371A1 Hydraulic/torsion packoff installation tool
03/1991
03/19/1991US5000266 Hydraulic/torsion packoff installation tool
03/12/1991CA1281380C Viscosity reduction apparatus
03/05/1991US4997041 Method for selectively operating a wireline tool releasing device
01/1991
01/30/1991EP0409880A1 Actuator and communication system.
12/1990
12/13/1990WO1990013731A3 Well control apparatus
11/1990
11/28/1990EP0269638B1 A method and a device for deep hole drilling
11/22/1990EP0397870A1 Method of casing the production seam in a well
11/13/1990WO1990013730A1 Arrangement in a pipe handling system
10/1990
10/29/1990WO1990013731A2 Well control apparatus
10/17/1990EP0391899A1 Device for steering the direction of drilling
10/03/1990CA2012534A1 Wear bushing retrieval tool
07/1990
07/12/1990WO1990007628A1 Wireline releasing device and method of releasing wireline
06/1990
06/27/1990CA2006200A1 Wireline releasing device and method of releasing wireline
05/1990
05/31/1990WO1990005832A1 Method of casing the production seam in a well
05/03/1990WO1990004467A1 Drilling mud separation system
03/1990
03/27/1990US4911834 Drilling mud separation system
03/20/1990US4909321 Wireline releasing device
02/1990
02/06/1990CA1265601A1 Programmed automatic drill control
01/1990
01/25/1990WO1990000666A1 Device for steering the direction of drilling
12/1989
12/26/1989US4889194 Method and a device for deep hole drilling
10/1989
10/19/1989WO1989010030A1 Actuator and communication system
09/1989
09/26/1989CA1261317A1 Percussion rock bit
09/20/1989EP0332622A1 Subsea systems and devices.
08/1989
08/30/1989EP0221154B1 Mechanical drive packer
08/16/1989EP0327598A1 Fusion-drilling process.
08/15/1989CA1258366A1 High temperature well cementing methods and compositions
07/1989
07/18/1989US4848964 Apparatus for correcting irregularities in or enlarging an underground duct
06/1989
06/20/1989CA1256019A1 Mechanical drive packer
04/1989
04/18/1989US4821465 Abrasive tool
03/1989
03/15/1989EP0221948B1 A drill adapter
10/1988
10/18/1988US4778970 Viscosity reduction apparatus using microwave energy
10/04/1988CA1242576A1 Method of recovering hydrocarbons from an underground formation
09/1988
09/27/1988CA1242463A1 Multi-insert cutter bit
09/20/1988US4771834 Percussion drill bit for rock perforators
07/1988
07/28/1988WO1988005491A1 Fusion-drilling process
06/1988
06/08/1988EP0269653A1 Apparatus for correcting irregularities in or enlarging an underground duct.
06/08/1988EP0269638A1 A method and a device for deep hole drilling.
02/1988
02/10/1988EP0255536A1 Drill tool
01/1988
01/20/1988EP0235268A4 Method and apparatus for reducing viscosity of high viscosity materials.
12/1987
12/01/1987US4709900 Choke valve especially used in oil and gas wells
09/1987
09/22/1987US4694918 Rock bit with diamond tip inserts
09/09/1987EP0235455A2 Percussion rock bit
09/09/1987EP0235268A1 Method and apparatus for reducing viscosity of high viscosity materials.
07/1987
07/30/1987WO1987004487A1 Drill tool
07/28/1987US4682662 Drill adapter
06/1987
06/10/1987CN86105356A Hydraulic control system for well tools
06/10/1987CN86105338A Underground blowout preventer
05/1987
05/19/1987US4666476 Different densities from a mixture
05/13/1987EP0221053A1 Oil well safety valve for use with drill pipe
04/1987
04/09/1987WO1987002092A1 Sealing packer
04/09/1987WO1987002091A1 A method and a device for deep hole drilling
04/07/1987US4655433 Riser tensioning system
03/1987
03/17/1987US4650153 Oil well safety valve for use with drill pipe
03/12/1987WO1987001551A1 Method and apparatus for reducing viscosity of high viscosity materials
02/1987
02/26/1987WO1987001106A1 Riser tensioning system
02/04/1987CN86103664A Improved composite polycrystalline diamond compact
02/03/1987US4640351 Sealing packer
12/1986
12/30/1986EP0206737A1 Abrasive tool
11/1986
11/06/1986WO1986006436A1 Mechanical drive packer
11/06/1986WO1986006435A1 A drill adapter
10/1986
10/29/1986EP0199669A2 Choke valve especially used in oil and gas wells
10/29/1986EP0199040A1 Percussion bit for rock drills
09/1986
09/25/1986WO1986005542A1 Percussion drill bit for stone drilling machines
08/1986
08/26/1986CA1210321A1 Detachable apparatus for preventing differential pressure sticking in wells
08/12/1986US4605195 Annular blowout preventer packing unit
04/1986
04/01/1986US4579176 Prevention of dissolution of sand or silicon compounds by salt formation with an aluminum compound
03/1986
03/18/1986CA1201946A1 Hydraulic down-the-hole rock drill
01/1986
01/29/1986EP0061473B1 System for transferring pipe
01/15/1986EP0167583A1 Fluid/fluid separators
01/15/1986EP0096037B1 Hydraulic down-the-hole rock drill
01/08/1986EP0060295B1 Tube handling apparatus
10/1985
10/22/1985CA1195491A1 Core orientation instrument
07/1985
07/04/1985WO1985002782A1 Fluid/fluid separators
07/03/1985EP0147215A2 Fluid/fluid separator
05/1985
05/28/1985US4519576 Oil well safety valve for use with drill pipe
05/21/1985CA1187480A1 Insulating tube for geothermal well intended to reduce the loss of heat
05/02/1985EP0139237A1 Apparatus for transferring pipe
02/1985
02/05/1985CA1182040A1 Remotely replaceable guidepost method and apparatus
07/1984
07/17/1984CA1171072A1 Rock bit
05/1984
05/22/1984CA1167833A1 Pipe handling system with apron and stacking arms
04/1984
04/17/1984CA1165756A1 Arrangement for full hole drilling
03/1984
03/06/1984CA1163186A1 Method and means for waterflooding a hydrocarbon fluid containing permeable formation below a body of water
01/1984
01/10/1984CA1160214A1 Shank adaptor for rock-drilling machines
02/1983
02/09/1983EP0061473A4 System for transferring pipe.
02/09/1983EP0060295A4 Tube handling apparatus.
1 ... 10 11 12 13 14 15 16 17 18 19 20 21