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)
01/1991
01/02/1991EP0405951A1 A releasable connector
01/02/1991CN2068582U Quick detachable protecting wire of casing
12/1990
12/30/1990WO1991000411A1 Drill string component
12/30/1990CA2058956A1 Drill string component
12/28/1990CA2010533A1 Insulating support for tubing string
12/27/1990WO1991000410A1 Device for guiding a drilling tool into a well and for exerting thereon a hydraulic force
12/27/1990EP0404669A1 Method and apparatus for conducting perforating operations in a well
12/26/1990CN1048076A Method of managing prodn. well
12/25/1990US4979585 Compound suspension linkage
12/25/1990US4979562 Float equipment including float collars and modular plugs for well operations
12/18/1990US4978147 In a well
12/12/1990CN2067315U Wellhead distance adjuster
12/12/1990CN2067314U Rock drill bar
12/11/1990US4976655 Connecting rod assembly for downhole drilling
12/11/1990US4976322 Method of construction of multiple-string wells
12/11/1990US4976142 Borehole pressure and temperature measurement system
12/05/1990EP0400137A1 Dual wall well development tool
12/04/1990US4975979 Three phase motor control for downhole logging tools
12/04/1990US4974882 Oilwell tubing connection
12/04/1990US4974691 Down-hole bearing assemblies
12/04/1990US4974690 Adapter for drilling strings with controllable air passage
12/04/1990US4974688 Steerable earth boring device
12/04/1990US4974672 Gravel packing system for a production radial tube
12/04/1990US4974446 Method and apparatus for analyzing a multi-phase flow in a hydrocarbon well
12/04/1990CA1277230C Wellhead isolation tool
11/1990
11/29/1990WO1990014497A2 Process and device for transmitting data signals and/or control signals in a pipe train
11/28/1990EP0399987A1 Device and method for signal transmission in drill stems
11/28/1990EP0399890A1 Apparatus for testing an oil well, and corresponding method
11/28/1990EP0399335A1 Damper system for a floating structure
11/27/1990US4972709 Pump control system, level sensor switch and switch housing
11/27/1990CA1277027C Antenna structure for use with a transmitter located at a great depth
11/26/1990CA2017282A1 Reverse circulation drill rod
11/21/1990CN2066072U Anti-trip unit for oil beam
11/20/1990US4971365 For use in a tool string
11/20/1990US4971162 Continuous drill feed apparatus
11/20/1990US4971157 Apparatus for the removal of spoil when making trenches of great depth
11/20/1990US4971147 In a well treatment system
11/20/1990US4971146 Downhole chemical cutting tool
11/20/1990CA1276624C Devices for drilling branched wells
11/15/1990WO1990013729A1 High-pressure pipe string for continuous fusion drilling of deep wells, process and device for manufacturing, propelling and dismantling it
11/15/1990CA2033068A1 High-pressure pipe string for continuous fusion drilling of deep wells
11/14/1990CN1010422B Drill pipes and castings utilizing mult-conduit tubulars
11/13/1990US4969671 Gas-tight joint for pipe linings and risers
11/07/1990EP0396204A2 Method and device for joining well tubulars
11/07/1990EP0395998A1 Forward thrust casing for subterraneously cut tunnels
11/07/1990CN2065235U Anti-overflow cleaning joint for drilling
11/06/1990US4968068 Thread coupling for drill string members
11/06/1990US4967855 Drilling tool
11/06/1990US4967844 Selectively operable ball valve and production packer system
10/1990
10/31/1990EP0394617A1 Measuring system for determining the pressure of concrete
10/31/1990DE3927436A1 Tensile pipe connection for shaft conveyor pipes - includes thread free centring spaces between connecting sleeve and pipe
10/31/1990CN2064818U Piston rod sealer for pumping oil
10/31/1990CN1046580A Double opening and anti-deforming upright-setter for casing pipe
10/30/1990US4966494 Low load pipe for pipe jacking
10/30/1990US4965937 Measure the distance from a specific pitch
10/28/1990CA2008152A1 Downhole pump
10/26/1990CA2015425A1 Connector assembly for wireline tool string
10/26/1990CA2015293A1 Casing centralizer
10/24/1990EP0393802A2 Connection element pretreatment process for a gastight pipe connection
10/23/1990US4964474 Flexible tunneling apparatus and method
10/19/1990CA2014764A1 Method for pretreating the connecting elements of a gas-tight pipe connection
10/18/1990WO1990012193A1 Coupling for drilling machine with dust extractor
10/17/1990EP0392964A2 Locking ring for oil well tool
10/17/1990EP0392755A1 A milling tool and combined stabiliser
10/17/1990EP0392470A2 Plastic bore seal
10/17/1990EP0391899A1 Device for steering the direction of drilling
10/16/1990US4963078 Stress and torque reducing tool and method
10/16/1990US4962822 Downhole drill bit and bit coupling
10/16/1990US4962579 Torque position make-up of tubular connections
10/16/1990CA1275303C Wireline well test apparatus and method
10/11/1990DE3911159A1 Coupling for drill pipe with force transmission
10/10/1990EP0391541A1 Wear bushing retrieval tool
10/10/1990EP0391119A1 Connecting element for a threaded joint of self-drilling injection anchors
10/10/1990EP0390932A1 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same.
10/10/1990EP0235262B1 Fatigue resistant coupling for tubular members
10/10/1990CN2063574U High-pressure casinghead capable of quick fitting
10/10/1990CN2063573U Double taper-face rod connecting and disconnecting device
10/10/1990CN1046015A Drill collar with the function of increasing pressure
10/10/1990CN1046014A Joint of sucker rod
10/09/1990US4961469 Drill string element
10/09/1990CA1275039A1 Marine riser base system
10/08/1990WO1990012235A1 Recoverable sleeve assembly for pipe joint
10/04/1990WO1990011455A1 Coupling
10/03/1990EP0390728A2 System for damping the heave of a floating structure
10/03/1990EP0390258A1 Grapple connection for coiled tubing
10/02/1990US4960174 Equipment for oil well drilling and completing operations in deep water
10/02/1990US4960173 Releasable well tool stabilizer
10/02/1990CA1274766A1 Measurement and intervention process and device in a well
09/1990
09/26/1990EP0389074A1 Pipe connector
09/26/1990CN1045627A Sucker rods of gear or rack form undergound extended-range device
09/25/1990US4959022 Electrical connector for high pressure applications with rapid pressure transients
09/25/1990US4958862 Hermetic metal pipe joint
09/25/1990US4958692 Downhole stabilizers
09/25/1990US4958691 Fluid operated vibratory jar with rotating bit
09/25/1990CA1274356A1 Highly tough erw steel pipe with distinguished sour resistance
09/20/1990DE3908658A1 Drill stem
09/20/1990DE3908646A1 Drill stem
09/19/1990EP0236430B1 Cylindrical threaded connection with uniform interference
09/18/1990US4957175 Soil drilling equipment
09/18/1990CA1274172A1 Method and apparatus for forming an insulated oil well casing
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