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)
11/2012
11/28/2012CN202560123U Anti-explosion protector for oil pipe
11/28/2012CN202560122U Novel casing centralizer
11/28/2012CN202560121U Novel oil pipe centralizer
11/28/2012CN202560120U Lock claw type sleeve thermal stress compensator
11/28/2012CN202560119U Connecting sleeve used for connecting twisted drill pipes and drilling machine
11/28/2012CN202560118U Eccentric wear resisting sucker rod coupling
11/28/2012CN202560117U Connecting-tripping device of sucker rod
11/28/2012CN202560116U Double-seal anti-corrosion water injection well oil pipe
11/28/2012CN202560115U Selective injection and water plugging integrated pipe column for thickened oil well
11/28/2012CN202560114U Efficient prestress thermal insulation pipe
11/28/2012CN202560113U Lining anticorrosive pipe
11/28/2012CN202560112U Novel small casing with special gap
11/28/2012CN202560111U Clamp-sticking-resisting oil pipe with lengthened and thickened ends
11/28/2012CN202560107U Drill bit special for caving fully mechanized coal face
11/28/2012CN202560103U Lengthened PDC drill bit with centralizer
11/28/2012CN102803807A Expansible threaded joint and method for making same
11/28/2012CN102797780A Bidirectional disconnection type titanium alloy sheet spring
11/28/2012CN102797439A Elastic contactor for oil casing pipe
11/28/2012CN102797422A Coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column
11/28/2012CN102022077B Drilling device for underground embedded pipe orifice well of soil source heat pump system
11/28/2012CN101975034B Hermetic seal connecting structure for special buckle of oil casing
11/28/2012CN101660401B Real-time alarming method by monitoring shutdown of pumping machine based on acceleration sensor
11/28/2012CN101595272B Microtunnelling system and apparatus
11/28/2012CN101550817B Hoisting system of stripper well in oil field
11/27/2012US8316948 Actuation assembly for riser connection dog
11/27/2012CA2558318C Providing a local response to a local condition in an oil well
11/27/2012CA2534901C Dynamic damper for use in a drill string
11/24/2012CA2777334A1 Velocity strings
11/22/2012WO2012156681A1 A buoyancy element, riser assembly including a buoyancy element and a method of supporting a riser
11/22/2012WO2012156434A2 Method and system for protecting a conduit in an annular space around a well casing
11/22/2012WO2012155912A1 An unbonded flexible pipe and pipe system
11/22/2012WO2012118851A3 Disconnect assembly for cylindrical members
11/22/2012WO2012106640A3 Connection cartridge for downhole string
11/22/2012WO2011089405A3 Multi-phase conductor shoe for use with electrical submersible pump
11/22/2012US20120292043 Downhole tools
11/22/2012US20120292040 Hybrid buoyed and stayed towers and risers for deepwater
11/22/2012US20120292039 Hybrid riser tower and methods of installing same
11/22/2012US20120292033 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292021 Rod Guide With Wrapping Vanes
11/22/2012CA2835228A1 Method and system for protecting a conduit in an annular space around a well casing
11/22/2012CA2835008A1 An unbonded flexible pipe and pipe system
11/21/2012EP2524104A2 Downhole hydraulic coupling assembly
11/21/2012CN202544883U Self-boring full thread hollow grouting anchor rod
11/21/2012CN202544822U Novel welding-free clamping device
11/21/2012CN202544767U Water-detecting drill rod
11/21/2012CN202544766U Threaded pile drill bit with joints
11/21/2012CN202544765U Device for righting eccentric wear rolling of polish rod at oil well head
11/21/2012CN202544764U Straight-through centering device for coupling
11/21/2012CN202544763U Thread protector for oil pipe
11/21/2012CN202544762U 2<7/8> large-inner-diameter oil pipe
11/21/2012CN202544761U Hermetic seal sleeve thread joint capable of being interchanged with API round thread
11/21/2012CN202544760U Hydraulic separator for coiled tubing
11/21/2012CN202544759U Front canopy type temporary supporting device for anchor pole supporting tunnel construction
11/21/2012CN202544758U Drill rod
11/21/2012CN202544757U High expansion ratio and low expansion ratio combined single-hole diameter expansion pipe pillar
11/21/2012CN202544749U Special drill bit for hamstring of I-shaped steel shed on coal roadway
11/21/2012CN202544748U Geological drilling device
11/21/2012CN202544743U Drilling machine
11/21/2012CN202544737U Pressurization type drilling machine
11/21/2012CN1930363B Clamping apparatus, drill string component and rock drilling rig
11/21/2012CN102791954A Driven latch mechanism
11/21/2012CN102790368A Suspension type cable moving device for offshore platform
11/21/2012CN102787831A Three-phase longitudinal support diversion wing-type centralizing rod
11/21/2012CN102787812A Integral multi-prismatic drill pipe
11/21/2012CN102787811A Oriented spray gun centering guide
11/21/2012CN102787810A Method for centering horizontal well cementing casing pipe
11/21/2012CN102787809A Special screw thread for joint of drilling tool
11/21/2012CN101874175B Two-element tandem flexible joint
11/20/2012US8312940 Apparatus and method for improvements in wellbore drilling
11/20/2012US8312937 Battery for a power tool with a battery pack ejector
11/20/2012US8312934 Control line retention and method for retaining control line
11/20/2012CA2473372C Two string drilling system using coil tubing
11/19/2012CA2743742A1 Rod guide with wrapping vanes
11/15/2012WO2012152657A1 Coupling for connecting tubular elements for bottom-hole assemblies
11/15/2012WO2012152278A1 An offshore system
11/15/2012WO2012125249A3 System and method for fracturing a formation and a method of increasing depth of fracturing a formation
11/15/2012WO2012112668A3 Surface close proximity wells
11/15/2012WO2012088102A3 Method and apparatus for milling a zero radius lateral window in casing
11/15/2012WO2012076617A3 Vibration transmission and isolation
11/15/2012WO2012076401A3 Resonance enhanced rotary drilling module
11/15/2012WO2012049331A3 A down-the-hole hammer
11/15/2012US20120286507 Threaded connection
11/15/2012US20120285697 Offshore universal riser system
11/15/2012US20120285679 Method for making centralizers for centralising a tight fitting casing in a borehole
11/15/2012CA2830808A1 Coupling for connecting tubular elements for bottom-hole assemblies
11/14/2012EP2521839A1 Wellbore treatment apparatus and method
11/14/2012EP2521833A2 Downhole tool releasing mechanism
11/14/2012CN202531140U Double-sealed hot water flooding tubular column of directional well in oil field
11/14/2012CN202531053U Electric hammer drill removing chips conveniently
11/14/2012CN202531052U Forced gauge-protection drilling tool centralizer with cutting function
11/14/2012CN202531051U Hydraulic casing centralizer
11/14/2012CN202531050U Sucker rod centralizer
11/14/2012CN202531049U Packing mounting centralizer for pumping unit wellhead
11/14/2012CN202531048U Polish rod centralizer of pumping well
11/14/2012CN202531047U Eccentric wear prevention autorotation rod post for oil well
11/14/2012CN202531046U Two-channel circulation joint
11/14/2012CN202531045U Axial locking device of drill rod
11/14/2012CN202531044U Anti-overflow joint for drilling washover operation
11/14/2012CN202531043U Rapid union for oil and gas testing technology process of oil fields
11/14/2012CN202531042U Bottom drilling tool combined structure used for coiled tubing drilling or boring <0}
1 ... 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 ... 278