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 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings
Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
11/1981
11/03/1981US4298078 Method of inhibiting sticking of well string
10/1981
10/29/1981WO1981003061A1 Device for recovering heat from underground water and/or from the soil adjoining the underground water
10/27/1981US4296973 Segmented hardfaced collar for tool joints
10/27/1981US4296830 Product provided with sound damping element
10/27/1981US4296781 Sectional pipe and tubular members for forming same
10/27/1981CA1111345A1 Marine production riser system and method of installing same
10/20/1981US4295751 Thread structure for percussion drill elements
10/20/1981US4295671 Flexible union with passive compensation
10/20/1981US4295526 Method and apparatus for connecting steel pipe sections
10/20/1981CA1110967A1 Well cementing/plug drilling apparatus and improved cementing and drilling process
10/20/1981CA1110966A1 Pump down wipe plug and cementing/drilling process
10/14/1981EP0037804A2 Rock drilling apparatus
10/13/1981US4294559 Pre-stressed structural joint
10/13/1981US4294444 Pipe gripping vise
10/13/1981CA1110613A1 Blades stabiliser with a minimum of one venturi effect spacing, particularly for use with an earth boring machine
10/06/1981US4293148 Pile connector
10/06/1981US4293039 Non-rotating stabilizer for drill string
09/1981
09/22/1981US4290494 Flexible shaft and roof drilling system
09/22/1981US4290484 Seal receptacle assembly
09/15/1981US4289202 Well tubing coupling apparatus
09/15/1981US4289025 Sonde with rotatable pad for carrying out logging measurements in a borehole
09/03/1981WO1981002442A1 Riser angle positioning system and process
09/01/1981US4286676 Crank connector for directional drilling
09/01/1981US4286663 Hydraulic pumping rod connecting and disconnecting device
09/01/1981CA1108117A1 Removable drill string stabilizers
08/1981
08/26/1981EP0034436A1 Pipe connector
08/25/1981US4286137 Method for assembling vertical ducts by electron-welding
08/25/1981US4285533 Apparatus for carrying first and second weight loads of a tubing string
08/25/1981US4285408 Reverse circulating tool
08/25/1981US4285407 Straight hole driller
08/25/1981CA1107828A1 Submersible electric motor and electrical connector assembly
08/25/1981CA1107638A1 Well collar or shoe and cementing/drilling process
08/25/1981CA1107494A1 Rotating shoe probe for taking measurements in a well
08/18/1981US4284154 Non-rotating spring loaded stabilizer
08/18/1981US4284143 System for the remote control, the maintenance or the fluid injection for a submerged satellite well head
08/12/1981EP0033405A1 Tension shock absorber device
08/11/1981CA1106923A1 Treating, including induction heating of well pipe connections
08/06/1981WO1981002181A1 Tracked cable guide assembly to store conductor cable inside a drill pipe
08/04/1981US4281858 Selectively bridged expansion joint
08/04/1981US4281726 Drill string splined resilient tubular telescopic joint for balanced load drilling of deep holes
08/04/1981US4281614 Connection of the upper end of an ocean upwelling pipe to a floating structure
08/04/1981CA1106356A1 Drilling apparatus with dual pipe and cross-over
08/04/1981CA1106355A1 Dual concentric pipe joint
07/1981
07/28/1981US4280742 Wall contacting tool
07/28/1981US4280719 Connector with rotatable locking ring, particularly for a riser used in offshore oil exploration and production
07/28/1981US4280535 Inner tube assembly for dual conduit drill pipe
07/22/1981EP0032265A1 Coupling for interconnecting pipe sections, and pipe section for well drilling operations
07/21/1981US4279850 Molding
07/21/1981US4279544 Helical apparatus for coupling submerged pipes
07/15/1981EP0031818A1 Methods and arrangements for casing a borehole
07/14/1981US4278363 Rock bolt and installation system
07/14/1981US4278277 Structure for compensating for different thermal expansions of inner and outer concentrically mounted pipes
07/14/1981US4278138 Composite heavy metal drill collar
07/14/1981US4278127 Apparatus for retrieving drill collars
07/14/1981US4277869 Stabilizer
07/07/1981US4277348 Cleaning sand from filter in oil well in situ
07/07/1981US4277108 Hard surfacing for oil well tools
07/07/1981US4276947 Roller Belleville spring damper
07/07/1981CA1104492A1 No translation available
07/01/1981EP0031125A1 Releasable pipe connection
06/1981
06/30/1981US4275935 Drilling stabilizer
06/30/1981US4275786 Apparatus for selectively coupling cables to well tools
06/23/1981US4274663 Multiple wall drill pipe
06/23/1981CA1103656A1 Enlarged bore hole drilling method
06/23/1981CA1103655A1 No translation available
06/23/1981CA1103654A1 No translation available
06/16/1981USRE30647 Tubular connection
06/16/1981US4273372 Apparatus for use in lowering casing strings
06/16/1981US4273201 Well drilling collars
06/16/1981US4273199 Torquer/thruster
06/16/1981US4273193 Process for use in degasification of subterranean mineral deposits
06/16/1981US4273159 Earth boring apparatus with multiple welds
06/16/1981US4273068 Connection of cold water riser pipes to supporting structures
06/09/1981US4272109 Ring gasket retainer for flanged connectors
06/09/1981US4271908 Tracked cable guide assembly and method for storing conductor cable inside a drill pipe
06/09/1981CA1102691A1 Liner for large diameter borehole
06/02/1981US4270620 Constant bottom contact tool
06/02/1981US4270619 Downhole stabilizing tool with actuator assembly and method for using same
05/1981
05/26/1981US4269269 Lock tab for centralizer end ring
05/26/1981CA1101832A1 Shock absorbing apparatus for drill string
05/26/1981CA1101831A1 Double acting shock absorbers for drill strings
05/26/1981CA1101830A1 Disconnectable riser for deep water operation
05/19/1981CA1101404A1 Multiple wall drill pipe
05/13/1981EP0028427A1 Device for mounting and removing a cutter at the end of the cutter shaft from a cutter dredge
05/12/1981US4266830 Auger construction providing reduced noise
05/12/1981US4266578 Drill pipe protector
05/06/1981EP0028121A1 Improvements relating to downhole shearers
05/05/1981US4265470 Tubular connector
05/05/1981US4265305 Mounting and shock absorber assembly for borehole telemetry apparatus
05/05/1981CA1100318A1 Vmp riser horizontal bearing
04/1981
04/29/1981EP0027771A1 Pipe joint for the oil industry
04/28/1981US4264234 Directional orientation apparatus for surface end of submerged oil line
04/28/1981CA1100127A1 Drill pipe wear belt assembly
04/21/1981US4263004 Device for transferring a fluid through a liquid body by means of a flexible pipe
04/21/1981US4262743 Diffuser for wellhead isolation tool
04/21/1981US4262380 Buoy including a mooring device
04/14/1981US4261556 Jig for assembly of knockdown centralizer
04/07/1981CA1098894A1 Non-rotating spring loaded stabilizer
04/01/1981EP0026100A2 Shock absorbing apparatus and drill string using such apparatus
03/1981
03/31/1981US4258804 Releasable drill string stabilizer
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