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)
11/1996
11/12/1996US5574263 Production logging mechanism for across-the-borehole measurement
11/12/1996US5573225 Means for placing cable within coiled tubing
11/12/1996US5572783 Method for utilizing a rod coupling tool for coupling and disassembling rods in a sucker rod string
11/07/1996WO1996035039A1 Tubular actuator component for use in a drill-string
11/07/1996WO1996035038A1 Threaded coupling, male and female extension members as well as a method of maintaining a threaded coupling
11/07/1996CA2219893A1 Threaded coupling, male and female extension members as well as a method of maintaining a threaded coupling
11/06/1996EP0741261A1 Screw connection for pipes
11/05/1996US5570742 Tubular cleaning tool
10/1996
10/31/1996WO1996034173A1 Drill string fitting
10/31/1996WO1996034172A1 Method and tool for use in commencing the drilling of a deviated well
10/30/1996EP0739673A1 Tube for hole saw
10/29/1996US5568839 Reinforced boring rod assembly and method of forming same
10/29/1996US5568836 Release device for releasably coupling a first object to a second object
10/23/1996EP0738355A1 Improvements in or relating to apparatus for use in forming piles
10/23/1996CN2238314Y Long-life coal drill rod
10/22/1996US5566772 Telescoping casing joint for landing a casting string in a well bore
10/22/1996US5566763 Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion
10/22/1996US5566754 Centralisers
10/17/1996WO1996024745A3 Computer controlled downhole tools for production well control
10/16/1996EP0737268A1 Control device for drilling a bore hole
10/16/1996CN2237713Y Multifunctional composite continuous oil pipe for oil well
10/15/1996US5564503 Methods and systems for subterranean multilateral well drilling and completion
10/15/1996US5564413 Oil well pipe for a casing
10/14/1996CA2173913A1 Downhole stress absorber
10/14/1996CA2147063A1 Tool for maintaining wellbore penetration
10/10/1996WO1996031680A1 Apparatus for use in a wellbore
10/10/1996DE19512123A1 Boring system for underground pipeline
10/10/1996CA2216523A1 Apparatus for use in a wellbore
10/09/1996CN2237107Y Drill rod connection device
10/09/1996CN2237106Y Connection structure for engineering drill rig and drill rod
10/08/1996US5562957 Multilayer fire protective coating
10/03/1996WO1996030620A1 Rock drilling tool, drill bit and a method of transferring percussive energy
10/03/1996WO1996021792A3 Riser assembly
10/03/1996CA2216974A1 Rock drilling tool, drill bit and a method of transferring percussive energy
10/02/1996CN1132306A Roller square filling core of torque testing for swivel plate drilling
10/01/1996US5560439 Method and apparatus for reducing the vibration and whirling of drill bits and the bottom hole assembly in drilling used to drill oil and gas wells
10/01/1996US5560437 Telemetry method for cable-drilled boreholes and method for carrying it out
09/1996
09/26/1996WO1996029535A1 Corrosion protection for steel pipes
09/26/1996WO1996029533A1 Threaded pipe connection
09/25/1996EP0733776A2 Rotary drag bit with pdc gauge bearing pads
09/25/1996EP0578681B1 Retrievable bridge plug and a running tool therefor
09/24/1996US5558170 Method and apparatus for improving drill bit stability
09/19/1996WO1996028635A1 Improved casing shoe
09/19/1996WO1996028634A1 Dual bore riser
09/19/1996DE19509782A1 Korrosionsschutz für Stahlrohre Corrosion protection for steel tubes
09/18/1996CN2235498Y Alternating magnetization device
09/18/1996CN1131465A Improved slick line system with real-time surface display
09/17/1996US5556594 Corrosion resistant age hardenable nickel-base alloy
09/17/1996US5555946 Method and tool for use in commmencing the drilling of a deviated well
09/11/1996CN1130739A Thread joint for tube
09/10/1996US5553979 Pull cap for attachment to a probe rod
09/10/1996US5553976 Fluid riser between seabed and floating vessel
09/10/1996US5553679 Modulated bias unit for rotary drilling
09/10/1996US5553676 Reversible expander
09/10/1996US5553666 For use in a fluid production well
09/07/1996CA2153202A1 Corrosion control well installations and tools for such installations
09/06/1996WO1996027069A1 Metal coiled tubing with signal transmitting passageway
09/06/1996WO1996027068A1 Position detection devices
09/06/1996CA2213849A1 Position detection devices
09/04/1996EP0729543A1 Well tool
09/04/1996CN2234501Y Buffer for preventing down-hole oil pipe from bending
09/03/1996US5551802 Tension leg platform and method of installation therefor
09/03/1996US5551512 Running tool
09/03/1996US5551511 Drilling fluid containment apparatus for use in disconnecting a kelly from a drill string
09/03/1996CA2100608C Jacket reinforcement for piping
09/03/1996CA2058789C Method of installing well conductors
09/03/1996CA2056181C Assembly arrangement using frustoconical screwthreads for tubes
09/03/1996CA2051550C Protector for bore rods and pump rods
08/1996
08/29/1996WO1996026351A1 Downhole tool
08/28/1996EP0728913A2 Apparatus for connecting sections of a perforating gun string
08/27/1996US5549336 High torque tool joint
08/27/1996US5549333 Blast joint
08/27/1996US5549158 Field installed slotted rod guide and method
08/22/1996DE19527990C1 Drill rod provided in central longitudinal section with tube and peripheral spiral
08/22/1996DE19527989C1 Drill rod with tubular central longitudinal section
08/21/1996EP0544835B1 Variable depth grooved drill string member
08/21/1996CN2233454Y Casing head for petroleum drilling and oil production
08/20/1996US5547503 Coating and bonding composition
08/20/1996US5547314 Offshore system and method for storing and tripping a continuous length of jointed tubular conduit
08/20/1996US5547032 Apparatus for drilling curved sections of well holes
08/20/1996US5547020 Corrosion control well installation
08/15/1996WO1996024745A2 Computer controlled downhole tools for production well control
08/14/1996EP0585315B1 Centraliser
08/13/1996CA2093039C Drill section of a drilling tool
08/13/1996CA2015647C Valve used in a hydraulic drilling jar
08/07/1996EP0724682A1 Tool for maintaining wellbore penetration
08/07/1996EP0601030B1 Process and device for measuring cable drilled bores
08/06/1996US5542784 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting
08/06/1996US5542483 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes
08/06/1996US5542476 Apparatus for drilling and maintenance of holes in a golf course
08/06/1996US5542472 Metal coiled tubing with signal transmitting passageway
08/06/1996US5542454 Free flow low energy pipe protector
08/01/1996WO1996023368A1 Method and apparatus for communicating by means of an electrical power cable
07/1996
07/31/1996EP0723622A1 Stabiliser for a downhole apparatus
07/31/1996CN2232071Y Short joint capable of adjusting interval of centralizer
07/31/1996CN2232070Y Threaded key plug-in type drilling rod joint
07/25/1996DE19502870A1 Locking pin for drilling rods used in underground mining
07/24/1996EP0723067A2 Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool
07/23/1996US5538092 Flexible drill pipe
07/23/1996US5538091 Bottom hole assembly
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