Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
---|
12/26/1978 | CA1045029A1 Marine riser |
12/19/1978 | US4130816 Circumferential acoustical detector |
12/19/1978 | US4130301 Double-walled well casing structure |
12/19/1978 | US4130169 Downhole connector for use with drill string telemetering system |
12/19/1978 | US4130162 Flow-through mule shoe sub |
12/19/1978 | US4130000 Drill string shock absorber |
12/19/1978 | CA1044691A1 Drill string stabilizer |
12/19/1978 | CA1044491A1 Drill shock absorber |
12/12/1978 | CA1044274A1 Wet drilling connector seal |
12/12/1978 | CA1044221A1 Hard surfaced well tool and method of making same |
12/05/1978 | US4128127 Swivel connector |
11/28/1978 | CA1043325A1 Hard surfaced well tool and method of making same |
11/21/1978 | US4126848 Drill string telemeter system |
11/21/1978 | US4126183 Offshore well apparatus with a protected production system |
11/21/1978 | CA1042943A1 Tubular connection |
11/21/1978 | CA1042786A1 Riser for jointed off-shore drilling rig_ |
11/14/1978 | CA1042477A1 Device for establishing a connection between successive duct sections |
11/14/1978 | CA1042417A1 Bit adjacent stabilizer and steel |
11/07/1978 | US4124232 Rigid pipe connector with lock elements and method of making the same |
11/07/1978 | US4124229 Rigid connector for pipe and method of making the same |
11/07/1978 | US4124070 Wireline shifting tool apparatus and methods |
10/24/1978 | US4121862 Pipe connection |
10/24/1978 | US4121861 Flexible sealing joint |
10/24/1978 | US4121675 Apparatus for gripping a shaft or the like |
10/17/1978 | US4121193 Kelly and kelly cock assembly for hard-wired telemetry system |
10/17/1978 | CA1040682A1 Casing joint |
10/10/1978 | US4118954 Motion compensator |
10/10/1978 | CA1040230A1 Flexible sealing joint |
09/26/1978 | US4116274 Wireline latching apparatus and method of use |
09/19/1978 | US4114928 High force connecting mechanism |
09/19/1978 | US4114701 Drill rod table bushing arrangement |
09/19/1978 | US4114698 Method and apparatus for tunneling upwardly |
09/19/1978 | CA1038856A1 Percussion drill bit |
09/19/1978 | CA1038633A1 Self-supported drilling riser |
09/12/1978 | US4113290 Pressure tight joint for a large diameter casing |
09/12/1978 | US4113236 Pulling tool apparatus |
09/12/1978 | US4113037 Rock drill |
09/05/1978 | CA1037946A1 Tool joint wear protectors |
08/29/1978 | US4109728 Apparatus and method for protecting well bore |
08/29/1978 | US4109488 Shock absorbing rotary drive coupling |
08/29/1978 | CA1037464A2 Drilling string shock-absorbing tool |
08/22/1978 | US4108478 Means to prevent relative rotation of threaded together pin and box tool joints |
08/22/1978 | US4108259 Raise drill with removable stem |
08/22/1978 | US4108256 Sliding stabilizer assembly |
08/22/1978 | US4108243 Apparatus for testing earth formations |
08/15/1978 | US4106823 Borehole contacting apparatus for bottom hole assembly |
08/15/1978 | US4106779 Automatic sequential dual action sealing system |
08/15/1978 | US4106347 Ultrasonic inspection apparatus for tubular members and method |
08/08/1978 | US4105969 Galvanometer mechanism mounted on printed circuit board having plug portion for insertion into control console receptacle |
08/08/1978 | US4105279 Removable downhole measuring instruments with electrical connection to surface |
08/08/1978 | US4105262 Releasable drill string stabilizer |
08/01/1978 | US4103939 Multi passage flexible connector |
08/01/1978 | US4103748 Method for inhibiting the wear in a well casing |
08/01/1978 | US4103741 Oil well perforation testing device |
07/25/1978 | US4102611 Plunger pump |
07/25/1978 | US4102552 Tandem eccentric roller stabilizer for earth boring apparatus |
07/25/1978 | US4102418 Borehole drilling apparatus |
07/25/1978 | US4102411 Drill stem for drilling upwardly |
07/25/1978 | US4102142 Underwater riser buoyancy |
07/18/1978 | US4101179 Drilling stabilizer including mechanical interlock device |
07/18/1978 | US4100972 Displacement hammer apparatus for sinking and lining boreholes |
07/18/1978 | US4100754 Method and apparatus for installing pipes in off-shore locations |
07/18/1978 | US4100752 Subsea riser system |
07/11/1978 | US4099992 Tubular products and methods of making the same |
07/11/1978 | US4099745 Drill pipe joint |
07/11/1978 | US4099585 Roof drilling system |
07/11/1978 | US4099564 Low heat conductive frangible centralizers |
07/11/1978 | US4099560 Open bottom float tension riser |
07/04/1978 | US4098544 Ski-type stabilizer for drilling apparatus, and method of use |
07/04/1978 | US4098361 Drilling head connection for use in a reverse circulation system |
07/04/1978 | US4098342 Method and apparatus for maintaining electric cable inside drill pipe |
07/04/1978 | US4098333 Offshore wells |
06/20/1978 | US4095865 Telemetering drill string with piped electrical conductor |
06/13/1978 | US4094364 Percussion drill rod |
06/06/1978 | US4093281 Method and apparatus for axially loading threaded connectors |
05/30/1978 | US4091883 Underreaming tool with overriding extended arm retainer |
05/30/1978 | US4091843 Flexible tubes for hydraulic applications |
05/30/1978 | US4091693 Helical surface-shaped machine part and method for manufacturing the same |
05/16/1978 | US4089548 Hydraulic releasing tool with plug |
05/16/1978 | US4089371 Production shoe |
05/09/1978 | US4088186 Centering device for well conduit |
05/09/1978 | US4088185 For oil wells |
05/02/1978 | US4087119 Fluid pressure operated duct coupling |
05/02/1978 | US4086972 Method and apparatus for roof drilling |
05/02/1978 | US4086971 Riser pipe inserts |
04/25/1978 | US4085474 Apparatus for interiorly cleaning lengths of pipe |
04/18/1978 | US4084829 Force-transmitting arrangement for hammer drills |
04/11/1978 | US4083612 Non-rotating stabilizer for earth boring and bearing therefor |
04/11/1978 | US4083415 Mining bit with replaceable work engaging member |
04/04/1978 | US4082373 Tandem roller stabilizer for earth boring apparatus |
04/04/1978 | US4082323 Box hole drill steel |
04/04/1978 | US4082144 Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
03/28/1978 | US4081203 Drill string stabilizer |
03/28/1978 | US4081042 Stabilizer and rotary expansible drill bit apparatus |
03/28/1978 | US4081039 Connecting assembly and method |
03/28/1978 | US4081028 Steam distribution system for use in a well |
03/21/1978 | US4080010 Tandem roller stabilizer for earth boring apparatus |
03/14/1978 | US4078605 Riser pipe string |
03/14/1978 | US4078584 Pipe system for collecting petroleum from off-shore wells located at great depths |
03/07/1978 | US4077657 Adjustable bent sub |