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 41 - Equipment or details not covered by groups
Patents for E21B 41 - Equipment or details not covered by groups (7,984)
12/1998
12/01/1998US5842516 Erosion-resistant inserts for fluid outlets in a well tool and method for installing same
11/1998
11/26/1998WO1998053174A1 Apparatus and method for drilling and lining a lateral wellbore
11/25/1998EP0879935A2 Method of controlling fine particulate flowback in subterranean wells
11/25/1998EP0879934A1 System and method for connecting two relatively movable assemblies, especially in underwater installations
11/24/1998US5839866 Mechanical overload protection device
11/24/1998US5839521 Oil and gas well cuttings disposal system
11/24/1998US5839508 Downhole apparatus for generating electrical power in a well
11/17/1998US5836394 Well regeneration apparatus
11/17/1998CA2107425C Kci drilling mud treatment for disposal system
11/17/1998CA2067215C Drill cuttings disposal method and system
11/12/1998WO1998050681A1 Wellbores utilizing fiber optic-based sensors and operating devices
11/12/1998WO1998050680A2 Monitoring of downhole parameters and tools utilizing fiber optics
11/12/1998WO1998050675A1 Multi-gage blowout preventer test tool and method
11/10/1998US5833002 Remote control plug-dropping head
11/05/1998WO1998049422A1 Apparatus and method for subsea connections of trees to subsea wellheads
11/05/1998WO1998040603A3 Apparatus and methods for generating energy utilizing downhole processed fuel
11/04/1998EP0581838B1 Engine for performing subsea operations and use of it in a core sampler
11/03/1998US5831156 Downhole system for well control and operation
10/1998
10/28/1998EP0874067A2 Apparatus and method for removing metal or mineral contaminants, especially for oil drilling equipments
10/22/1998WO1998046856A1 Drilling assembly with reduced stick-slip tendency
10/21/1998EP0871817A1 Apparatus for setting a liner in a well casing
10/21/1998EP0871816A1 Release mechanism
10/21/1998EP0760895B1 Lateral drilling method
10/20/1998US5825660 Method of optimizing component layout using a hierarchical series of models
10/15/1998WO1998045732A1 Pressure impulse telemetry apparatus and method
10/15/1998WO1998045731A1 High impact communication and control system
10/15/1998WO1998045571A1 Window assembly for multiple wellbore completions
10/15/1998WO1998045570A1 Method and apparatus for deploying a well tool into a lateral wellbore
10/14/1998EP0870899A1 Drilling assembly with reduced stick-slip tendency
10/11/1998CA2234745A1 Underground mining drill rig
10/07/1998EP0869201A2 Method for preventing metal deposition and an oil or gas well with electrically contacting means
10/06/1998US5816326 Uphole disposal tool for water producing gas wells
09/1998
09/24/1998WO1998041728A1 Removing a waste component from a hydrocarbon fluid
09/23/1998EP0866212A1 Installation for production well
09/23/1998EP0866211A2 Stabilizing and cementing lateral well bores
09/23/1998EP0800611B1 Oil and gas field chemicals
09/22/1998US5810578 Device for burning gas from a production plant for oil or gas
09/22/1998US5810514 Method for introducing materials into a medium
09/18/1998CA2230771A1 Installation for effluent producing well
09/17/1998WO1998040603A2 Apparatus and methods for generating energy utilizing downhole processed fuel
09/17/1998WO1998040602A1 A method and a means for arranging and installing a structure on the sea bed
09/17/1998CA2232019A1 Stabilizing and cementing lateral well bores
09/16/1998CN2291499Y Cementing impact pressure predicting device
09/15/1998US5807095 For separating combustible gas from fluid produced during drilling
09/15/1998CA2155588C Method and apparatus for the injection disposal of solid and liquid waste materials from the drilling and production of oil and gas wells
09/09/1998EP0862682A2 Autonomous downhole oilfield tool
09/09/1998EP0697057A4 Drill bit and other downhole tools
09/08/1998US5803689 Device for interconnection of two objects
09/08/1998US5803167 Computer controlled downhole tools for production well control
09/02/1998EP0861968A2 Annulus pressure responsive tool apparatus
09/02/1998EP0861309A1 Method for extracting oil from oil-contaminated soil
08/1998
08/27/1998WO1998037465A1 Adaptive objet-oriented optimization software system
08/27/1998CA2252512A1 Adaptive object-oriented optimization software system
08/20/1998WO1998036200A1 Tool for intercoupling of two subsea pipelines
08/20/1998DE19706371A1 Electric generator for current generation in bore trace
08/19/1998EP0859124A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859123A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859122A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859121A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859120A2 Method and apparatus for completing wells with lateral branches
08/18/1998US5794720 Method of assaying downhole occurrences and conditions
08/18/1998CA2148649C Mechanical lockout for pressure responsive downhole tool
08/13/1998CA2229104A1 Methods of completing a subterranean well and associated apparatus
08/05/1998EP0856600A1 LiGa02 single crystal, single-crystal substrate, and method of manufacturing the same
08/05/1998EP0558534B1 Well completion system
08/04/1998US5787987 Lateral seal and control system
07/1998
07/28/1998US5785133 Multiple lateral hydrocarbon recovery system and method
07/23/1998WO1998012418A3 Autonomous downhole oilfield tool
07/23/1998EP0862682A3 Autonomous downhole oilfield tool
07/22/1998EP0853508A1 A method for introducing materials into a solid or semi-solid medium
07/15/1998EP0852653A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
07/15/1998EP0852652A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access
07/14/1998US5781436 Method and apparatus for transverse electromagnetic induction well logging
07/14/1998US5778981 Device for suspending a sub sea oil well riser
07/08/1998EP0851966A1 System for selective re-entry to completed laterals
07/07/1998US5775442 Recovery of gas from drilling fluid returns in underbalanced drilling
07/07/1998US5775425 Control of fine particulate flowback in subterranean wells
07/01/1998CN1186543A System for geothermal production of electricity
06/1998
06/23/1998US5769164 Wellbore cleaning tool
06/11/1998WO1998009053A3 Method and apparatus for sealing a junction on a multilateral well
06/10/1998CN1184526A Method for connecting underwater pipelines particularly suitable for great depths and big diameters
06/09/1998US5762149 Method and apparatus for well bore construction
06/09/1998US5762143 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells
06/03/1998EP0845071A1 Through-tubing lateral re-entry
06/02/1998US5758725 Method and device for enhancing oil and gas flow in a well
05/1998
05/26/1998US5755892 Waste disposal of contaminated drill cuttings from geological drilling using drilling fluid systems containing mineral oil
05/26/1998US5755288 Downhole gas compressor
05/20/1998EP0842347A1 Device and process for the lining of a pipe branch, particularly in an oil well
05/20/1998CN1182165A Method and apparatus for establishing branch wells at node of parent well
05/19/1998US5753180 Anthrahydroquinone
05/14/1998WO1998020257A1 Inverted accumulator
05/13/1998EP0841266A2 Method and device for filling caverns
05/12/1998US5749676 Method of accessing a sub sea well and a guide arrangement therefor
05/07/1998WO1998019040A1 Recovery of gas from drilling fluid returns in underbalanced drilling
05/06/1998EP0840141A2 Well logging data interpretation
05/06/1998EP0839257A1 Lightweight intervention system
05/06/1998EP0839254A1 Branch boreholes
05/01/1998CA2217427A1 Systems and methods for forward modeling of well logging tool responses
04/1998
04/23/1998WO1998016717A1 Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks
04/23/1998DE19745947A1 Vorrichtung und Verfahren zum Bohren von Erdformationen Apparatus and method for drilling earth formations
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