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)
12/1995
12/12/1995US5474334 Coupling assembly
12/12/1995US5474143 Drill bit reamer stabilizer
12/12/1995US5474132 Marine riser
12/12/1995US5474128 Telescoping conduits for increasing the fluid resistance of well production tubing inadvertently dropped in an oil or gas well
12/12/1995US5474097 Scale removal and disposal system and method
12/12/1995CA2018826C Detachable torque transmitting tool joint
12/07/1995WO1995033120A1 A well entry tool
12/07/1995WO1995032831A1 Work piece repair
12/06/1995EP0685630A2 Mounting apparatus for dual drill pipe
12/06/1995EP0685627A2 A modulated bias unit for rotary drilling
12/06/1995EP0685626A2 A modulated bias unit for rotary drilling
12/06/1995EP0685625A2 A modulated bias unit for rotary drilling
12/06/1995EP0685624A2 A modulated bias unit for rotary drilling
12/06/1995EP0685623A2 A rotatable pressure seal
12/06/1995EP0685603A1 Multi-shaft excavating device
12/06/1995EP0685301A1 Hydraulic percussive device with infinitely variable number of impacts and impact energy
12/05/1995US5472053 For use in a well casing
12/05/1995CA2150734A1 Modulated bias unit for rotary drilling
12/05/1995CA2150732A1 Modulated bias unit for rotary drilling
12/05/1995CA2150731A1 Modulated bias unit for rotary drilling
11/1995
11/30/1995WO1995032355A1 Double walled insulated tubing and method of installing same
11/30/1995WO1995026454A3 Curved drilling apparatus
11/29/1995EP0683845A1 Drill pipe
11/29/1995CN2213835Y Tooth insert type pump-absorb positive and negative circulation special joint
11/28/1995US5470118 Shear device for well service tools
11/28/1995US5469916 System for depth measurement in a wellbore using composite coiled tubing
11/28/1995US5469878 Coiled tubing concentric gas lift valve assembly
11/22/1995EP0683304A2 Borehole logging tool
11/22/1995EP0682738A1 Drilling apparatus.
11/21/1995US5468153 Wireline swivel and method of use
11/21/1995US5468029 Pipe coupling
11/21/1995US5467836 Fixed cutter bit with shear cutting gage
11/21/1995US5467831 Monotube differential pneumopercussive reversible self-propelled soil penetrating machine with stabilizers
11/21/1995US5467826 Oilfield tubing string integrally enclosing a fluid production or injection tube and a service line
11/16/1995WO1995030819A1 Rotatable cutting bit assembly
11/15/1995CN1030264C Low friction subterranean drill bit and related methods
11/14/1995US5465793 Spoolable flexible hydraulic controlled annular control valve
11/14/1995US5465791 Resilient spider for well installation
11/14/1995US5465759 Variable diameter pipe protector
11/08/1995EP0681353A1 Means and method for placing cable within coiled tubing
11/08/1995EP0681089A1 Coiled tubing thruster
11/08/1995EP0681086A2 Hydraulic disconnecting apparatus
11/08/1995EP0681085A2 Coiled tubing connector
11/08/1995CN2212068Y Under well pipe capable of releasing and jointing
11/08/1995CN2212067Y reversely covered anti-slid device of oil pump rod
11/07/1995US5464059 Apparatus and method for supplying fluid into different zones in a formation
11/07/1995CA2147591A1 Means and method for placing cable within coiled tubing
11/06/1995CA2122959A1 Coil tubing thruster
11/02/1995WO1995029321A1 Casing tube with casing shoe
11/01/1995CN2211494Y Spline drill joint for fast connection
11/01/1995CN1111066A Shock absorbing assembly
10/1995
10/31/1995US5462315 Stabilized center-shoulder-sealed tubular connection
10/31/1995US5462130 Drilling tool
10/26/1995WO1995028316A1 A device for oil production at great depths at sea
10/25/1995EP0678880A1 Inductive coupler for well tools
10/25/1995EP0678655A1 Drill bit
10/24/1995US5460416 Perforated fiber reinforced pipe and couplings for articulating movement
10/23/1995CA2147558A1 Inductive coupler for well tools
10/20/1995CA2121645A1 Drill bit
10/19/1995WO1995027588A1 Method for facing a substrate
10/19/1995DE4413180A1 Long-term installation of optical fibre cable-connected instrument
10/17/1995US5458507 Fluid resistant electrical connector with boot-type seal assembly
10/17/1995US5458208 Directional drilling using a rotating slide sub
10/17/1995US5457988 Side pocket mandrel pressure measuring system
10/12/1995WO1995027101A1 Vortex induced vibration suppression
10/11/1995EP0676001A1 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface
10/10/1995US5456106 Down hole assembly
10/10/1995CA2044128C Conductor guide forming machine
10/05/1995WO1995026454A2 Curved drilling apparatus
10/05/1995WO1995026294A1 Spar platform
10/03/1995US5455573 Inductive coupler for well tools
10/03/1995US5454605 Tool joint connection with interlocking wedge threads
10/03/1995US5454420 Method and apparatus for rotating downhole tool in wellbore
10/03/1995US5454419 Method for lining a casing
10/03/1995CA1337192C Fluid operated vibratory jar with rotating bit
09/1995
09/28/1995WO1995023908A3 Fluid-tight connecting apparatus
09/27/1995EP0674094A1 Running downhole tools with coiled tubing
09/26/1995US5452923 Coiled tubing connector
09/26/1995US5452772 Apparatus for steering the foremost part of the drillpipe
09/21/1995WO1995025239A1 Device for permanent joining of tubes
09/21/1995WO1995025216A1 Manipulator-arm for auxiliary-tool for the joining of drillpipe
09/21/1995WO1995021317A3 Drilling bit assembly and apparatus
09/20/1995EP0672818A1 Modular measurement while drilling sensor assembly
09/20/1995EP0672817A1 Gas impermeable static seal
09/20/1995CN2208094Y Fast smooth rod clamp
09/14/1995DE4405303C1 Bodenbearbeitungsgerät Harrow
09/13/1995EP0671546A1 Casing centraliser
09/12/1995US5449248 Sealing device for expansion joints of concrete dams and method for installing same
09/12/1995US5449048 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface
09/12/1995CA1336945C Corrosion resistant age hardenable nickel-base alloy
09/08/1995WO1995023908A2 Fluid-tight connecting apparatus
09/07/1995DE4409673C1 Tubing for filter tube for extraction of ground water samples
09/06/1995EP0670413A2 Cement head quick connector
09/06/1995EP0670021A1 Pipe connecting assembly and method for joining two lengths of steel pipe by a press-fit connection
09/06/1995EP0548303B1 Method for continuing a measuring operation after recovering a measuring instrument stuck in a well
09/06/1995CN1107929A Oil well pipe and method for making the same background of the invention
09/06/1995CN1107928A Rotating drill
09/05/1995US5447472 Articulated coupling for use with a progressive cavity apparatus
09/05/1995US5447392 Backspan stress joint
09/05/1995US5447207 Downhole tool
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