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)
12/1978
12/26/1978CA1045029A1 Marine riser
12/19/1978US4130816 Circumferential acoustical detector
12/19/1978US4130301 Double-walled well casing structure
12/19/1978US4130169 Downhole connector for use with drill string telemetering system
12/19/1978US4130162 Flow-through mule shoe sub
12/19/1978US4130000 Drill string shock absorber
12/19/1978CA1044691A1 Drill string stabilizer
12/19/1978CA1044491A1 Drill shock absorber
12/12/1978CA1044274A1 Wet drilling connector seal
12/12/1978CA1044221A1 Hard surfaced well tool and method of making same
12/05/1978US4128127 Swivel connector
11/1978
11/28/1978CA1043325A1 Hard surfaced well tool and method of making same
11/21/1978US4126848 Drill string telemeter system
11/21/1978US4126183 Offshore well apparatus with a protected production system
11/21/1978CA1042943A1 Tubular connection
11/21/1978CA1042786A1 Riser for jointed off-shore drilling rig_
11/14/1978CA1042477A1 Device for establishing a connection between successive duct sections
11/14/1978CA1042417A1 Bit adjacent stabilizer and steel
11/07/1978US4124232 Rigid pipe connector with lock elements and method of making the same
11/07/1978US4124229 Rigid connector for pipe and method of making the same
11/07/1978US4124070 Wireline shifting tool apparatus and methods
10/1978
10/24/1978US4121862 Pipe connection
10/24/1978US4121861 Flexible sealing joint
10/24/1978US4121675 Apparatus for gripping a shaft or the like
10/17/1978US4121193 Kelly and kelly cock assembly for hard-wired telemetry system
10/17/1978CA1040682A1 Casing joint
10/10/1978US4118954 Motion compensator
10/10/1978CA1040230A1 Flexible sealing joint
09/1978
09/26/1978US4116274 Wireline latching apparatus and method of use
09/19/1978US4114928 High force connecting mechanism
09/19/1978US4114701 Drill rod table bushing arrangement
09/19/1978US4114698 Method and apparatus for tunneling upwardly
09/19/1978CA1038856A1 Percussion drill bit
09/19/1978CA1038633A1 Self-supported drilling riser
09/12/1978US4113290 Pressure tight joint for a large diameter casing
09/12/1978US4113236 Pulling tool apparatus
09/12/1978US4113037 Rock drill
09/05/1978CA1037946A1 Tool joint wear protectors
08/1978
08/29/1978US4109728 Apparatus and method for protecting well bore
08/29/1978US4109488 Shock absorbing rotary drive coupling
08/29/1978CA1037464A2 Drilling string shock-absorbing tool
08/22/1978US4108478 Means to prevent relative rotation of threaded together pin and box tool joints
08/22/1978US4108259 Raise drill with removable stem
08/22/1978US4108256 Sliding stabilizer assembly
08/22/1978US4108243 Apparatus for testing earth formations
08/15/1978US4106823 Borehole contacting apparatus for bottom hole assembly
08/15/1978US4106779 Automatic sequential dual action sealing system
08/15/1978US4106347 Ultrasonic inspection apparatus for tubular members and method
08/08/1978US4105969 Galvanometer mechanism mounted on printed circuit board having plug portion for insertion into control console receptacle
08/08/1978US4105279 Removable downhole measuring instruments with electrical connection to surface
08/08/1978US4105262 Releasable drill string stabilizer
08/01/1978US4103939 Multi passage flexible connector
08/01/1978US4103748 Method for inhibiting the wear in a well casing
08/01/1978US4103741 Oil well perforation testing device
07/1978
07/25/1978US4102611 Plunger pump
07/25/1978US4102552 Tandem eccentric roller stabilizer for earth boring apparatus
07/25/1978US4102418 Borehole drilling apparatus
07/25/1978US4102411 Drill stem for drilling upwardly
07/25/1978US4102142 Underwater riser buoyancy
07/18/1978US4101179 Drilling stabilizer including mechanical interlock device
07/18/1978US4100972 Displacement hammer apparatus for sinking and lining boreholes
07/18/1978US4100754 Method and apparatus for installing pipes in off-shore locations
07/18/1978US4100752 Subsea riser system
07/11/1978US4099992 Tubular products and methods of making the same
07/11/1978US4099745 Drill pipe joint
07/11/1978US4099585 Roof drilling system
07/11/1978US4099564 Low heat conductive frangible centralizers
07/11/1978US4099560 Open bottom float tension riser
07/04/1978US4098544 Ski-type stabilizer for drilling apparatus, and method of use
07/04/1978US4098361 Drilling head connection for use in a reverse circulation system
07/04/1978US4098342 Method and apparatus for maintaining electric cable inside drill pipe
07/04/1978US4098333 Offshore wells
06/1978
06/20/1978US4095865 Telemetering drill string with piped electrical conductor
06/13/1978US4094364 Percussion drill rod
06/06/1978US4093281 Method and apparatus for axially loading threaded connectors
05/1978
05/30/1978US4091883 Underreaming tool with overriding extended arm retainer
05/30/1978US4091843 Flexible tubes for hydraulic applications
05/30/1978US4091693 Helical surface-shaped machine part and method for manufacturing the same
05/16/1978US4089548 Hydraulic releasing tool with plug
05/16/1978US4089371 Production shoe
05/09/1978US4088186 Centering device for well conduit
05/09/1978US4088185 For oil wells
05/02/1978US4087119 Fluid pressure operated duct coupling
05/02/1978US4086972 Method and apparatus for roof drilling
05/02/1978US4086971 Riser pipe inserts
04/1978
04/25/1978US4085474 Apparatus for interiorly cleaning lengths of pipe
04/18/1978US4084829 Force-transmitting arrangement for hammer drills
04/11/1978US4083612 Non-rotating stabilizer for earth boring and bearing therefor
04/11/1978US4083415 Mining bit with replaceable work engaging member
04/04/1978US4082373 Tandem roller stabilizer for earth boring apparatus
04/04/1978US4082323 Box hole drill steel
04/04/1978US4082144 Method and apparatus for running and retrieving logging instruments in highly deviated well bores
03/1978
03/28/1978US4081203 Drill string stabilizer
03/28/1978US4081042 Stabilizer and rotary expansible drill bit apparatus
03/28/1978US4081039 Connecting assembly and method
03/28/1978US4081028 Steam distribution system for use in a well
03/21/1978US4080010 Tandem roller stabilizer for earth boring apparatus
03/14/1978US4078605 Riser pipe string
03/14/1978US4078584 Pipe system for collecting petroleum from off-shore wells located at great depths
03/07/1978US4077657 Adjustable bent sub
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