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)
11/1998
11/19/1998WO1998030823A3 Connector
11/18/1998EP0878603A2 Well conduit cutting and milling apparatus and method
11/18/1998EP0877702A1 System for anchoring ships
11/18/1998EP0877701A1 System for production of hydrocarbons
11/18/1998CN2297532Y Falling-proof clamp joint for side drilling hot recovery well
11/18/1998CN1199255A Female wet connector
11/18/1998CN1199254A Male pin connector
11/18/1998CN1040791C Integral joint for connecting two pipes
11/17/1998US5836407 Articulated tool for drilling oil, gas geothermal wells
11/17/1998US5836406 In a borehole
11/17/1998US5836404 Drill bits with enhanced hydraulic flow characteristics
11/17/1998US5836396 Method of operating a downhole clutch assembly
11/17/1998US5836388 Flexible joint for downhole tools
11/17/1998CA2145909C Rod guide with removable vanes
11/12/1998WO1998050721A1 Ultra high torque double shoulder tool joint
11/12/1998WO1998050720A1 Threaded connection for enhanced fatigue resistance
11/12/1998WO1998050669A1 Non-metallic centralizer for casing
11/12/1998WO1998050668A1 Apparatus for controlling the motion of a string of tubulars in a wellbore
11/12/1998CA2288740A1 Threaded connection for enhanced fatigue resistance
11/11/1998EP0877146A2 Well conduit cutting and milling apparatus and method
11/11/1998EP0876546A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector
11/11/1998EP0876545A1 Method for forming a window in a tubular and apparatus for use in said method
11/11/1998CN2296927Y Drill rod jointing sleeve
11/11/1998CN1198502A Boring device and torque support for boring device
11/10/1998US5833585 Method and apparatus for exercising muscles
11/10/1998US5833541 Elastomeric joints having interlocking threaded portions
11/10/1998US5833490 For connecting an insulated electrical conductor to an electrical contact
11/10/1998US5833399 In the ground
11/10/1998US5833019 For use in a wellbore
11/10/1998US5833018 Protector for a pipe in a casing or wellbore
11/10/1998CA2132895C Method of eliminating severe slug in multi-phase flow subsea lines
11/05/1998DE19718897A1 Double-walled pipe for drilling wells in geological structures
11/05/1998DE19716998A1 Drill-string shock absorber unit, used in deep drilling
11/04/1998EP0527932B1 Preform device and process for coating and/or lining a cylindrical volume
11/03/1998US5829797 Threaded joint for oil well pipes
11/03/1998US5829524 Method of preparing a downhole casing tubular
11/03/1998CA2144901C Spoolable coiled tubing mandrel and gas lift valves
10/1998
10/29/1998DE19817000A1 Underground pipeline with external lubricant feed to reduce friction with ground
10/28/1998CN2295846Y Self-tighting drop-off preventer for sucker rod
10/27/1998US5828003 Composite coiled tubing apparatus and methods
10/27/1998CA2034817C Drill pipe/casing protector
10/22/1998WO1998046854A1 Side pocket mandrel for a measuring instrument
10/22/1998WO1998046853A1 Connector with variable resistance retention member
10/21/1998EP0872625A2 Rotary drill bits with nozzles
10/21/1998EP0872624A2 Improvements in or relating to rotary drill bits
10/21/1998EP0871831A2 Subsea flexible pipe
10/21/1998EP0871817A1 Apparatus for setting a liner in a well casing
10/21/1998EP0871816A1 Release mechanism
10/20/1998US5823837 For a floating vessel for receiving hydrocarbon product
10/20/1998US5823274 Drill rod
10/20/1998US5823266 Latch and release tool connector and method
10/20/1998US5823264 Travel joint for use in a subterranean well
10/20/1998US5823258 Centralizer apparatus
10/20/1998US5823257 Rotatable wet connect for downhole logging devices
10/20/1998US5823256 Ferrule--type fitting for sealing an electrical conduit in a well head barrier
10/20/1998US5823131 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
10/14/1998CN2294327Y Three-fluid-passage used in gas lifting oil prodn. by gas-lift-balls
10/13/1998US5821452 Coiled tubing supported electrical cable having clamped elastomer supports
10/13/1998US5820416 Multiple contact wet connector
10/13/1998US5819862 Downhole components for use in subsurface drilling
10/13/1998US5819861 Earth-boring bit with improved cutting structure
10/13/1998US5819860 Rotary drill bits
10/13/1998US5819852 Monobore completion/intervention riser system
10/13/1998US5819851 Blowout preventer protector for use during high pressure oil/gas well stimulation
10/13/1998US5819847 Adapter for oil well tubings
10/13/1998CA2133865C Downhole mill and method for milling
10/08/1998WO1998044236A1 Threaded joint for tubes
10/08/1998WO1998043550A1 Titanium molybdenum hafnium alloys for medical implants and devices
10/08/1998WO1998029638A3 Deepwater riser system
10/07/1998EP0869256A2 Rotary drill bit with gage definition region, method of manufacturing such a drill bit and method of drilling a subterranean formation
10/07/1998CN2293639Y Gearless rod gripping of beam-pumping unit
10/07/1998CN2293638Y 抽油杆扶正器 Sucker rod centralizer
10/06/1998US5816344 For use in a drill string for drilling a bore through a formation
10/01/1998WO1998042947A1 Expandable slotted tubing string and method for connecting such a tubing string
10/01/1998WO1998042946A1 Electrically actuated disconnect apparatus
10/01/1998WO1998042945A1 Rotary drive shaft for downhole pump
10/01/1998WO1998042944A1 Apparatus and a method for drilling boreholes
10/01/1998WO1998026151A3 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom
10/01/1998CA2255750A1 Apparatus and a method for drilling boreholes
09/1998
09/30/1998EP0867597A2 Pipe connector
09/30/1998EP0867596A1 Threaded coupling for tubes
09/30/1998CN2292895Y Extendible drilling expansion structure of drilling rod for pile driving
09/30/1998CN1194328A Technology for producing non-standard size integrated-joint petroleum casing
09/29/1998USRE35912 Method of installing lean-to well protector
09/29/1998US5813484 Casing tube with casing shoe
09/29/1998US5813469 Coupled downhole pump for simultaneous injection and production in an oil wheel
09/29/1998US5813467 Composite cylinder termination formed using snap ring
09/29/1998CA2145908C Rod guide with enhanced erodable volume
09/24/1998WO1998041731A1 Device by tubing
09/24/1998WO1998041729A1 Device for limiting the bending radius of a flexible duct
09/23/1998EP0866209A1 Element for a rotating drill string
09/23/1998EP0865613A1 Composite material structures having reduced signal attenuation
09/23/1998EP0865562A2 Tubing connector
09/23/1998EP0865561A1 Reaming apparatus with enhanced stability and transition from pilot hole to enlarged bore diameter
09/22/1998US5810100 Non-rotating stabilizer and centralizer for well drilling operations
09/22/1998US5810088 Electrically actuated disconnect apparatus and method
09/22/1998US5810086 Single riser with two wellheads
09/22/1998US5810084 Gravel pack apparatus
09/22/1998US5810081 In a tool string
09/17/1998WO1998040601A1 Friction reducing tool
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