| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 10/06/1987 | US4698590 Method and apparatus for measuring velocity of ferromagnetic tubing |
| 10/06/1987 | US4697947 Plug connection for boring tubes |
| 10/06/1987 | US4697652 Reversible roller stabilizer extensions for earth boring head |
| 10/06/1987 | US4697648 Spring-loaded suspension system for augers and screw anchors |
| 10/06/1987 | US4697641 For use with downhole tools suspended from a cable in a well bore |
| 09/30/1987 | EP0238957A2 Tool for a hydraulic hammer or the like |
| 09/30/1987 | EP0131621B1 Tubular joint with trapped mid-joint metal to metal seal |
| 09/29/1987 | US4696498 Tubular connection |
| 09/29/1987 | CA1227511A1 Tubular joint |
| 09/29/1987 | CA1227422A1 Connection between a submarine well head and a surface support |
| 09/24/1987 | DE3609876A1 Swivel |
| 09/23/1987 | EP0238169A1 Tension leg platform and anchoring structure therefor |
| 09/22/1987 | US4694909 Riser support system |
| 09/22/1987 | US4694878 Disconnect sub for a tubing conveyed perforating gun |
| 09/22/1987 | CA1227128A1 Well tool locking apparatus |
| 09/16/1987 | EP0236915A1 Drillstring joint |
| 09/16/1987 | EP0236722A1 Flexible column from composite material |
| 09/15/1987 | US4693540 Pressure regulating devices |
| 09/15/1987 | US4693498 Anti-rotation tubular connection for flowlines or the like |
| 09/15/1987 | US4693328 Expandable well drilling tool |
| 09/15/1987 | US4693327 Earth well drilling apparatus |
| 09/15/1987 | US4693317 For use in an earth borehole |
| 09/15/1987 | US4693316 Round mandrel slip joint |
| 09/15/1987 | US4693313 Insulated wellbore casing |
| 09/15/1987 | US4692988 Under tightening torques, dry and liquid lubricants |
| 09/09/1987 | EP0235581A1 Coupling, especially for a diamond drill bit with a tube shaft and tube winding connection |
| 09/09/1987 | EP0235478A2 Borehole casing diagnostic apparatus |
| 09/08/1987 | US4691791 Knurled drill stem |
| 09/08/1987 | US4691787 Earth auger |
| 09/08/1987 | US4691430 Method and means for sealing electrical conductor rods in a tubular housing |
| 09/02/1987 | CN86100426A Earth auger |
| 09/01/1987 | US4690229 Radially stabilized drill bit |
| 09/01/1987 | US4690214 Method and a device for carrying out measurements and/or operations in a well |
| 09/01/1987 | US4690212 Drilling pipe for downhole drill motor |
| 09/01/1987 | CA1226274A1 Shock absorbing tool for a well drilling string |
| 08/26/1987 | EP0233802A1 Composite threaded fitting for steel pipe |
| 08/26/1987 | EP0233794A1 Apparatus for connecting auxiliary lines to an underwater drilling equipment |
| 08/25/1987 | US4688832 Well pipe joint |
| 08/25/1987 | US4688831 Threaded or push-type coupling |
| 08/25/1987 | US4688828 Tubing joint for corrosion protection |
| 08/25/1987 | US4688649 Mechanical drill string jar |
| 08/25/1987 | US4688636 Non-weld casing centralizer |
| 08/25/1987 | US4688632 Quick connect wellhead adapter |
| 08/25/1987 | CA1225929A1 Retrievable insert landing assembly |
| 08/20/1987 | DE3701189A1 Method and device for fitting seismic sensors in an oil production well |
| 08/19/1987 | EP0233038A2 Down-the-hole-drill |
| 08/18/1987 | US4687368 Thread structure for percussion rock drilling |
| 08/13/1987 | WO1987004755A1 Method and apparatus for data transmission in a well using a flexible line with stiffener |
| 08/12/1987 | EP0232214A2 Lifting head |
| 08/12/1987 | EP0231592A2 Locking device |
| 08/12/1987 | EP0231414A1 Earth auger |
| 08/11/1987 | US4686653 Method and device for making geophysical measurements within a wellbore |
| 08/11/1987 | US4685895 Stabilizer mechanism for use in drilling deviated well bores |
| 08/11/1987 | US4685518 Blast joint |
| 08/11/1987 | US4685516 Apparatus for operating wireline tools in wellbores |
| 08/11/1987 | CA1225433A1 Surveying of boreholes using shortened non-magnetic collars |
| 08/11/1987 | CA1225328A1 Segmented concentric centralizer |
| 08/06/1987 | DE3603510A1 Crystal bag for pipe connections |
| 08/05/1987 | EP0230812A1 Seismic probe, in particular for use in a non-tubed borehole |
| 08/04/1987 | US4684946 Device for transmitting to the surface the signal from a transmitter located at a great depth |
| 08/04/1987 | US4683956 Method and apparatus for operating multiple tools in a well |
| 08/04/1987 | US4683944 Drill pipes and casings utilizing multi-conduit tubulars |
| 08/04/1987 | CA1225016A1 Annular electrical contact apparatus for use in drill stem testing |
| 07/30/1987 | WO1987004505A1 Composite threaded joint for steel tube |
| 07/30/1987 | WO1987004487A1 Drill tool |
| 07/29/1987 | EP0229861A1 Coupling for oil and gas field pipes |
| 07/29/1987 | CN87100310A Process and device for installing seismic sensors inside petroleum production well |
| 07/28/1987 | CA1224716A1 J-configured offshore oil production riser |
| 07/28/1987 | CA1224715A1 Apparatus and method for connecting subsea production equipment to a floating facility |
| 07/21/1987 | US4681175 For installing utility pipes in the ground |
| 07/21/1987 | US4681169 Apparatus and method for supplying electric power to cable suspended submergible pumps |
| 07/21/1987 | US4681163 Sand control system |
| 07/21/1987 | US4681162 Borehole drill pipe continuous side entry or exit apparatus and method |
| 07/21/1987 | US4681161 Well screen centralizer and method for constructing centralizer and for joining of well screens |
| 07/21/1987 | US4681159 Setting tool for a well tool |
| 07/21/1987 | CA1224414A1 Stabilizer for drillstems |
| 07/16/1987 | DE3542523C1 Length of pipe |
| 07/14/1987 | US4679964 Offshore well support miniplatform |
| 07/14/1987 | US4679831 Pipe coupling connection sealing apparatus |
| 07/14/1987 | US4679669 Shock absorber |
| 07/14/1987 | US4679637 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein |
| 07/14/1987 | CA1224164A1 Electrode supporting conduit tube for electrical heating of underground hydrocarbon resources |
| 07/07/1987 | US4678038 Side entry sub well logging apparatus and method |
| 07/07/1987 | US4678031 Rotatable reciprocating collar for borehole casing |
| 07/07/1987 | CA1223809A1 Subsea wellhead protector |
| 07/01/1987 | EP0227534A1 Resilient swivel support |
| 07/01/1987 | EP0227456A2 Earth well drilling apparatus |
| 07/01/1987 | EP0227279A1 Spar buoy fluid transfer system |
| 06/30/1987 | US4676563 Antiarrhythmic |
| 06/30/1987 | US4676529 Pipe joint |
| 06/30/1987 | US4676528 Method and apparatus for restoring tubular upsets |
| 06/23/1987 | US4674773 Insulating coupling for drill collars and method of manufacture thereof |
| 06/23/1987 | US4674580 Means for reducing bending stresses in drill pipe |
| 06/23/1987 | US4674171 Heavy wall drill pipe and method of manufacture of heavy wall drill pipe |
| 06/23/1987 | CA1223293A1 Safety joint |
| 06/23/1987 | CA1223248A1 Compensation device for insertion in a drill string for deep-well drilling tools |
| 06/18/1987 | WO1987003642A1 Drill string stabiliser |
| 06/16/1987 | US4673652 Method of testing and reconditioning insulating tubular conduits |
| 06/16/1987 | US4673312 Method and apparatus for the underground installation of pipelines |
| 06/16/1987 | US4673201 Pipe connector |