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)
09/2012
09/26/2012CN102690992A Method for producing casing pipe for thickened oil thermal production well
09/26/2012CN102071366B High-toughness drilling rod applicable to corrosion acid environment and processing method thereof
09/26/2012CN101949266B Inner rotor type rotary joint
09/25/2012US8272456 Slim-hole parasite string
09/25/2012US8272444 Method of testing a drilling riser connection
09/25/2012CA2666180C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
09/25/2012CA2616175C Mid-seal for expandable connections
09/20/2012WO2012125917A1 Method and systems to sever wellbore devices and elements
09/20/2012WO2012125831A2 Systems and methods of controling oilfield equipment via inductive coupling
09/20/2012WO2012125619A2 Hydro-mechanical downhole tool
09/20/2012WO2012125421A1 Restricted axial movement locking mechanism
09/20/2012WO2012125300A1 Self centering bore measurement unit
09/20/2012WO2012125249A2 System and method for fracturing a formation and a method of increasing depth of fracturing a formation
09/20/2012WO2012082620A3 Improved alignment of downhole strings
09/20/2012US20120234560 Restricted axial movement locking mechanism
09/20/2012US20120234559 Downhole swivel sub
09/20/2012CA2830262A1 Method and systems to sever wellbore devices and elements
09/20/2012CA2829681A1 Self centering bore measurement unit
09/19/2012EP2501032A2 Power generator for booster amplifier systems
09/19/2012EP2499327A2 Connecting device for kill/choke lines between a riser and a floating drilling vessel
09/19/2012EP2499326A1 Jacking units and bellows for down hole intervention tools
09/19/2012EP2499325A1 Method for coupling of a casing tube to a drill bit
09/19/2012EP2499324A2 Device and method for attaching an id-marker to a production pipe
09/19/2012CN202441279U Double-nut anti-drop warning device of screw rod drilling tool
09/19/2012CN202441278U Clamping type polish rod unloading hand protector
09/19/2012CN202441277U Hydraulic sleeve centering device
09/19/2012CN202441276U Axial casing pipe controller
09/19/2012CN202441275U Drilling rod pin-releasing square head of automatic pin-releasing inner core for rotary digging machine
09/19/2012CN202441274U Screw structure of large-nozzle CQ50 tool joint
09/19/2012CN202441273U Water lifting and diversion connector
09/19/2012CN202441272U Drilling rod
09/19/2012CN202441271U Drilling rig body made of drilling rigs abandoned from excavator
09/19/2012CN202441270U Spherical column type universal shaft of screw drill for oilfield
09/19/2012CN202440815U Forming device for long-spiral filling pile extruded into rock
09/19/2012CN102686823A Core Lifter
09/19/2012CN102686821A Method of drilling and jet drilling system
09/19/2012CN102678103A Method for determining size of groove of drill collar of while drilling electromagnetic wave electrical resistivity instrument
09/19/2012CN102678094A Vertical type throttling kill manifold for offshore oil production
09/19/2012CN102678093A Vertical cementing manifold for offshore oil production
09/19/2012CN102678071A High-airtightness special buttress thread sleeve connection joint
09/19/2012CN102678070A Threaded coupling for pipe
09/19/2012CN102678069A Boring device having a buffering function and anchor construction method using the same
09/19/2012CN102678068A Toothed thread drill stem joint
09/19/2012CN102678067A Structure for reinforcing welding head of welded weighted drill pipe
09/19/2012CN102678066A Special threaded oil pipe joint with air-tight seal
09/19/2012CN102678065A High-airtightness special buttress thread pipe joint
09/19/2012CN102678064A Control method for improving anti-sticking performance and connection strength of round thread oil pipe and bushing
09/19/2012CN102678054A Spirally bottom-expanding integrated drill bit
09/19/2012CN102678048A Multi-stage hydraulic punching drill
09/19/2012CN102678044A Well drilling rod and pulse plasma drilling machine system
09/19/2012CN102678040A Drilling device and method for baseplate in coal mine roadway
09/19/2012CN102121395B Method for integrated comprehensive management of gas in low-permeability single coal bed
09/19/2012CN101975033B Damping device
09/19/2012CN101928888B Low-alloy steel for resisting carbon dioxide corrosion and manufacturing method thereof
09/19/2012CN101864907B Vibration damper and downhole drill comprising the same
09/19/2012CN101603420B Method and device for telemetering torque moment of drill stem
09/18/2012US8267203 Earth-boring tools and components thereof including erosion-resistant extensions, and methods of forming such tools and components
09/18/2012US8267172 System and method for determining position within a wellbore
09/18/2012CA2736997C Pipe section guide system with flexible member
09/18/2012CA2512164C Data transmission system for a downhole component
09/13/2012WO2012122337A2 Altra-low friction coatings for drill stem assemblies
09/13/2012WO2012121857A1 Expansion cone assembly for setting a liner hanger in a wellbore casing
09/13/2012WO2012121608A1 Method and device for reducing friction between helical members of a downhole damper
09/13/2012WO2012120251A2 Restraint systems for hybrid decoupled risers
09/13/2012US20120230151 Borehole Imaging And Orientation Of Downhole Tools
09/13/2012US20120228034 Drill stem components and string of components
09/13/2012US20120228029 Method and Device for Reducing Friction Between Helical Members of a Downhole Damper
09/13/2012US20120227959 Expandable centralizer for expandable pipe string
09/13/2012CA2827878A1 Expansion cone assembly for setting a liner hanger in a wellbore casing
09/12/2012EP2496788A2 Core lifter
09/12/2012EP2496786A2 Method for the drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material and device therefor
09/12/2012CN202431227U Single-acting drill collar
09/12/2012CN202431226U Rotator for sucker rod
09/12/2012CN202431225U Antiseptic, anti-scale and anti-wax protector of oil tube and sucker rod
09/12/2012CN202431224U Single-acting drilling centralizer
09/12/2012CN202431223U Centralizer of resin screw shell
09/12/2012CN202431222U Casing head for tie-back in well repair
09/12/2012CN202431221U Hydraulic safety connector for drill column of horizontal well
09/12/2012CN202431220U Deep hole wire-line coring drill rod
09/12/2012CN202431219U Drill rod clamp
09/12/2012CN202431218U Blowout prevention high-pressure resistance bypass nipple
09/12/2012CN202431217U Anti-tripping oil pumping rod
09/12/2012CN202431216U Drill rod connecting rod
09/12/2012CN202431215U Drill bit connecting bar
09/12/2012CN202430710U Five-axis concrete mixing pile device
09/12/2012CN102667050A Assembly for producing a threaded connection, method for making up and breaking out said connection and use of said connection in a work over riser
09/12/2012CN102667048A Drilling a borehole and hybrid drill string
09/11/2012US8261841 Coated oil and gas well production devices
09/10/2012CA2781721A1 Multi-zone fracturing completion
09/07/2012WO2012118851A2 Disconnect assembly for cylindrical members
09/07/2012WO2012117034A1 Drill stem component comprising a movable coupler and a pressure chamber
09/07/2012WO2012116984A2 Tubular component for drill stem capable of being cabled, and method for mounting a cable in said component
09/07/2012WO2012116983A1 Annular coupler for drill stem component
09/07/2012WO2012087516A3 Downhole release joint with radially expandable member
09/07/2012WO2012082779A3 Method, system and apparatus for deployment of umbilicals in subsea well operations
09/07/2012CA2828486A1 Disconnect assembly for cylindrical members
09/06/2012US20120222865 Drilling Riser Adapter Connection with Subsea Functionality
09/06/2012US20120222858 Drill rod
09/05/2012EP2495389A1 Drilling rod
09/05/2012EP2494561A1 Integrated high power umbilical
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