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)
10/1985
10/22/1985CA1195684A1 Lubrication system for a drill rod shank in a percussion drilling machine
10/08/1985US4545269 Machine to apply a screwing or unscrewing torque
10/08/1985CA1194855A1 Drilling of wells with top drive unit
08/1985
08/21/1985EP0152385A2 A device in rock drilling machines
08/07/1985EP0150977A2 Earth drill
08/07/1985EP0150695A2 Well drilling assembly
08/06/1985CA1191505A1 Power tong and jaw apparatus
07/1985
07/16/1985US4529045 Top drive drilling unit with rotatable pipe support
07/09/1985US4527640 Working platform for a drilling apparatus
06/1985
06/25/1985CA1189501A1 Device in rock or earth drilling apparatus for rotary drilling
06/04/1985US4520879 Ratchet and hydraulic seal assembly for rotating hollow shafts
04/1985
04/17/1985EP0137202A1 Rotary rock drilling chuck
04/16/1985CA1185593A1 Kelly seal
04/09/1985US4509605 Wireline protector with improved clamping mechanism
03/1985
03/12/1985CA1183831A1 Drilling rig jack mechanism
01/1985
01/23/1985EP0131771A1 Drilling device, especially for underground mining
01/16/1985EP0131539A1 Noise attenuation of a pile driving rotating rocker
12/1984
12/18/1984US4488729 Drill box
12/11/1984US4487271 For sampling dense mineral specimens
12/11/1984CA1179322A1 Top drive well drilling apparatus
12/05/1984EP0126829A1 Roof drill shock absorbing coupling
11/1984
11/27/1984CA1178573A1 Power spinner for rotating a kelly joint
11/06/1984US4480703 Drilling head
10/1984
10/02/1984US4474249 Kelly seal
08/1984
08/07/1984CA1172242A1 Reversal mechanism for power tong
07/1984
07/18/1984EP0113654A2 Rotating and/or percussive drilling machine
07/10/1984US4458768 Top drive well drilling apparatus
07/04/1984EP0112811A2 Pressurized medium actuated gripping device
05/1984
05/22/1984US4449596 Drilling of wells with top drive unit
05/08/1984CA1167025A1 Dual camming action jaw assembly and power tong
04/1984
04/18/1984EP0105860A2 Rotation device, particularly for rotative tools
04/17/1984US4442907 Apparatus for stringing well pipe or casing
03/1984
03/21/1984EP0103283A2 An apparatus for inserting a tool into the ground and continuously rotating it
03/20/1984US4437524 Well drilling apparatus
03/20/1984US4437363 Dual camming action jaw assembly and power tong
03/13/1984US4436002 In a pipe gripping tong
02/1984
02/14/1984US4431067 Wireline protector with clamping mechanism
02/14/1984US4431063 Drive mechanism for drill
01/1984
01/31/1984CA1161426A1 Progressing cavity motor governing system
01/03/1984US4423645 Pipe spinner
12/1983
12/27/1983CA1159442A1 Dual-wall drill pipe
12/20/1983US4421183 Flexible drive apparatus for boring lateral bore holes from well
12/20/1983US4421179 Top drive well drilling apparatus
12/20/1983US4421175 Method of drilling and casing a well
11/1983
11/22/1983US4416337 Drill head assembly
11/15/1983CA1157007A1 Well drilling apparatus
09/1983
09/28/1983EP0089599A1 Handling device for drilling rods
09/07/1983EP0087917A1 Drilling apparatus
09/06/1983CA1153307A1 Rotary drive assembly for downhole rotary pump
08/1983
08/02/1983US4396072 Method and apparatus for producing a drill hole
07/1983
07/19/1983US4393945 Rotary drill with a kelly bar and hydraulic chuck
06/1983
06/22/1983EP0082099A2 Power tong and jaw apparatus
06/22/1983EP0082098A2 Power tong unit, especially for gripping a pipe
05/1983
05/10/1983CA1146156A1 Drill head assembly
02/1983
02/08/1983US4372379 Rotary drive assembly for downhole rotary pump
02/01/1983US4371041 Multi-purpose mobile drill rig
01/1983
01/05/1983EP0068610A2 A power spinner for rotating a Kelly joint
12/1982
12/28/1982CA1138420A1 Raise drill apparatus
11/1982
11/02/1982CA1134717A1 Hydraulic circuitry for raise drill apparatus
10/1982
10/26/1982US4355691 Hydraulic drilling apparatus
09/1982
09/28/1982US4351399 Drill
09/28/1982US4351398 Well drilling apparatus
09/07/1982CA1131052A1 Chuck and wrench assembly for raise drill apparatus
08/1982
08/25/1982EP0058222A1 Hydraulic tubing machine for foundation piles and control device therefor
08/24/1982CA1130171A1 Hydraulic drilling apparatus
08/17/1982US4344599 Rock drill boom structure
07/1982
07/27/1982US4341271 Rock drilling method
07/20/1982CA1128034A1 Kelly drive bushing adapter
07/13/1982US4339161 Bearing seal for a drill head assembly
07/13/1982US4339007 Progressing cavity motor governing system
04/1982
04/20/1982US4325233 Kelly and kelly drive bushing
03/1982
03/30/1982CA1120913A1 Drive mandrel for a drilling shaft
03/09/1982CA1119581A1 Downhole drilling system
03/02/1982US4317493 Kelly drive bushing adapter
03/02/1982US4317491 Wireline protector
02/1982
02/16/1982US4315552 Raise drill apparatus
02/09/1982US4314611 Apparatus for supporting and rotating a down hole tubular
02/09/1982CA1117933A1 Multi-purpose mobile drill rig
02/02/1982US4313318 Adjustable kelly bushing for downhole drilling system
12/1981
12/08/1981US4304310 Drilling head
12/01/1981US4303130 All terrain drill unit
11/1981
11/03/1981US4298076 Chuck and wrench assembly for raise drill apparatus
11/03/1981US4298073 Drill head
10/1981
10/06/1981US4293047 Drilling head
08/1981
08/25/1981US4285406 Drilling head
08/25/1981US4285215 Rotary table and kelly guard
08/04/1981US4281724 Drilling head
06/1981
06/16/1981US4273200 Drive mandrel for a drilling stem
06/16/1981US4273199 Torquer/thruster
04/1981
04/21/1981US4262756 Torquer/thruster
04/21/1981US4262754 Rotary drilling device with pivoting drill head assembly
03/1981
03/31/1981US4258802 Downhole drilling system
03/10/1981US4254638 Positive release means for articulated flexible shaft
01/1981
01/27/1981CA1094541A1 Rock drill boom structure
01/20/1981CA1094047A1 Rock drilling apparatus
11/1980
11/25/1980CA1090326A1 Chuck for an earth boring machine
11/11/1980US4232749 Convertible rotary/percussion drill
10/1980
10/28/1980US4230190 Blow out preventer handling system
10/07/1980US4226311 Rotary drive disc brake for drawworks
09/1980
09/09/1980CA1085377A1 Casing tong
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