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)
07/1998
07/23/1998CA2277782A1 Buoyancy device and method for using same
07/22/1998EP0737287B1 Pipe fitting
07/22/1998CN2286494Y Joint
07/21/1998US5782503 Threaded joint for tubes
07/21/1998US5782310 Dry hollow stem augers
07/21/1998CA2073259C Drill bit having enhanced stability
07/16/1998WO1998030823A2 Connector
07/16/1998WO1998030782A1 Asymmetrical drill stem for drilling oil wells
07/16/1998CA2277470A1 Connector
07/16/1998CA2248203A1 Asymmetrical drill stem for drilling oil wells
07/15/1998EP0853202A1 Joint assembly
07/14/1998US5778987 Guided drilling system with shock absorber
07/14/1998US5778981 Device for suspending a sub sea oil well riser
07/14/1998US5778979 Latch and release perforating gun connector and method
07/14/1998US5778978 Exterior wireline cable adapter sub
07/14/1998US5778976 Casing installation equipment
07/13/1998CA2226796A1 Dissolvable release mechanism for travel joints and method
07/09/1998WO1998029638A2 Deepwater riser system
07/09/1998WO1998029637A1 Lockable swivel apparatus and method
07/09/1998WO1998029298A1 Spar platform with vertical slots
07/08/1998EP0851967A1 Single bore riser system
07/07/1998US5775433 For latching to a well tool
07/07/1998CA2145911C Snap-on rod guide
07/02/1998WO1998028516A1 Drill pipe/casing protector
07/02/1998DE19716999C1 Hydraulic compensator isolating forces between long sections of drill string in deep drilling
07/02/1998DE19654654A1 Borehole casing method suitable for unsure formations
07/01/1998EP0851090A1 Down-the-hole hammer
07/01/1998EP0627040B1 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes
07/01/1998CN2285368Y Trapezoidal thread casing with joint hoop
06/1998
06/30/1998US5772514 Torque control device for rotary mine drilling machine
06/30/1998US5772350 Protected swivel
06/30/1998US5771975 Composite cylinder termination
06/30/1998US5771968 Cable-based pumping system
06/23/1998US5769558 Flex joint
06/23/1998US5769466 Threaded joint for pipes
06/23/1998US5769166 Wellbore window milling method
06/23/1998US5769160 For communicating electricity downhole to a well tool in a wellbore
06/23/1998CA2096838C Twisted percussion drill rod and manufacturing method
06/18/1998WO1998026151A2 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom
06/17/1998EP0847476A1 Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit
06/17/1998CN1185190A Connector assembly for an expandable slotted pipe
06/16/1998US5765836 Sealing system
06/16/1998US5765653 Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter
06/16/1998US5765640 Multipurpose tool
06/16/1998CA2091547C Centralizer
06/11/1998WO1998025003A1 Single riser with two wellheads
06/11/1998WO1998024686A1 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
06/11/1998CA2282696A1 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
06/11/1998CA2273101A1 Single riser with two wellheads
06/10/1998CN1184199A Catenary riser support
06/10/1998CN1038702C Rotating drill
06/09/1998US5762142 Coiled tubing apparatus
06/09/1998US5762136 Wear bushing lockdown and method of inserting
06/09/1998US5762135 Underground well electrical cable transition, seal and method
06/04/1998WO1998023844A1 Method and device for production of hydrocarbons
06/04/1998WO1998023840A1 Pipe protector
06/04/1998CA2272923A1 Method and device for production of hydrocarbons
06/03/1998EP0845576A2 Drill string
06/03/1998CN2283124Y Rolling rod stabilizer
06/03/1998CA2222321A1 Elevated electrical connector assembly
06/02/1998US5758732 Control device for drilling a bore hole
06/02/1998US5758723 Fluid pressure deactivated thru-tubing centralizer
05/1998
05/28/1998WO1998022691A1 System to lower the depth equipment in hydrocarbons wells
05/28/1998WO1998022690A1 Connector for an expandable tubing string
05/28/1998WO1998022336A1 Spar structure
05/27/1998EP0844331A1 Power transmission device for a drill for obtaining soil samples
05/27/1998EP0843773A1 Friction-reducing drill pipe component
05/27/1998CN2282599Y Spring support type sucker rod centralising device
05/27/1998CN1183131A Tubular actuator component for use in a drill-string
05/26/1998US5755297 Rotary cone drill bit with integral stabilizers
05/26/1998US5755284 Used on a rod string powering a progressing cavity pump
05/26/1998CA2135402C Guide assembly and method
05/22/1998WO1998021445A1 Communication conduit in a well tool
05/22/1998WO1998021444A2 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch
05/20/1998EP0842345A1 Drilling method and casing shoe
05/20/1998CN2282058Y Hydraulic back-off sub
05/20/1998CN2282057Y Eccentric anti-inclining drill combination
05/20/1998CN2282056Y Centralizer of screw pump
05/14/1998WO1998020506A1 Smooth surfaced fiber optic logging cable for well bores
05/14/1998WO1998020229A1 Method and apparatus for attaching a casing to a drill bit in overburden drilling equipment
05/14/1998CA2270959A1 Method and apparatus for attaching a casing to a drill bit in overburden drilling equipment
05/13/1998EP0689635B1 Casing pipe with coupling sleeves at one or both ends
05/13/1998CN2281413Y Oil-well joint with pipe thread
05/13/1998CN1038353C Steel for high strength non-magnetic drill collar
05/12/1998US5749676 Method of accessing a sub sea well and a guide arrangement therefor
05/12/1998CA2060008C Tubing connector
05/07/1998DE19646341C1 Device for laying pipes below ground
05/06/1998EP0839989A2 Releasable connection
05/06/1998EP0839255A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
05/06/1998EP0630455B1 Stabilized center-shoulder-sealed tubular connection
05/05/1998US5746277 Drilling apparatus
04/1998
04/30/1998WO1998017921A1 Fairing system for subsea drilling rigs and method for installation and removal
04/29/1998EP0837979A1 Drill bit retainer for a down hole hammer assembly
04/28/1998US5745047 Downhole electricity transmission system
04/28/1998CA2028723C Hydraulic running and release tool with mechanical emergency release
04/22/1998EP0796406A4 Internal coiled tubing connector
04/22/1998CN2279439Y Anti-inversing device for sucker rod
04/22/1998CN2279438Y Anti-releasing device for sucker rod
04/22/1998CN1179810A Rock drilling tool, drill bit and method of transferring percussive energy
04/21/1998US5740873 Rotary bit with gageless waist
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