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)
05/2003
05/28/2003CA2411819A1 Communicating with a tool
05/27/2003US6568469 Method and apparatus for connecting a main well bore and a lateral branch
05/27/2003CA2233081C System for selective re-entry to completed laterals
05/22/2003WO2001083940A9 Electrical well heating system and method
05/21/2003EP1312750A2 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
05/21/2003CN1419677A Integrated reservoir optimization
05/20/2003US6564873 Apparatus for offshore production of hydrocarbon fluids
05/20/2003US6564870 Method and apparatus for completing wells with expanding packers for casing annulus formation isolation
05/20/2003US6564867 Method and apparatus for cementing branch wells from a parent well
05/20/2003CA2097198C Method for treating drill cuttings during oil and gas drilling
05/20/2003CA2074594C Method and apparatus for producing a porosity log of a subsurface formation corrected for detector standoff
05/15/2003WO2003040517A1 Docking station assembly and methods for its use in a wellbore
05/15/2003WO2003040515A1 Guide device in an offshore drilling installation
05/15/2003WO2003040514A2 Proppant recovery system
05/13/2003US6561735 Well riser lateral restraint and installation system for offshore platform
05/13/2003US6561279 Method and apparatus for completing a wellbore
05/13/2003US6561277 Flow control in multilateral wells
05/13/2003CA2156977C Improved methods and systems for subterranean multilateral well drilling and completion
05/08/2003US20030085816 High-power well logging method and apparatus
05/08/2003US20030085815 Docking station assembly and methods for use in a wellbore
05/08/2003US20030085037 Multilateral open hole gravel pack completion
05/08/2003US20030085034 In situ thermal processing of a coal formation to produce pyrolsis products
05/07/2003EP1000221B1 Electro-hydraulic well tool actuator
05/06/2003US6558619 High performance phosphorus-containing corrosion inhibitors for inhibiting corrosion drilling system fluids
05/06/2003US6557628 Apparatus for establishing branch wells from a parent well
05/06/2003CA2101446C Well completion system
05/06/2003CA2055495C Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube
05/06/2003CA2055437C Device for protecting wells from corrosion or deposits caused by the nature of the fluid produced or located therein
05/05/2003CA2408425A1 Apparatus and method for downhole well equipment and process management, identification, and operation
05/02/2003EP1305502A1 Vibration based power generator
05/02/2003EP0842347B1 Device and process for the lining of a pipe branch, particularly in an oil well
05/01/2003WO2003036022A1 Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration
05/01/2003WO2002038914A9 System and method for signalling downhole conditions to surface
05/01/2003WO2002038909A9 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator
05/01/2003CA2463762A1 Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration
04/2003
04/29/2003US6555506 Corrosion inhibitors
04/29/2003US6554074 Lift fluid driven downhole electrical generator and method for use of the same
04/29/2003US6554063 Apparatus for establishing branch wells from a parent well
04/29/2003US6554062 Anchor apparatus and method
04/24/2003WO2003034522A1 Operating electrolyte based components
04/24/2003WO2003033862A1 Operating fuel cells
04/24/2003US20030075334 Wellbore liner system
04/24/2003US20030075318 In situ thermal processing of a coal formation using substantially parallel formed wellbores
04/24/2003US20030074777 Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration
04/23/2003EP1303681A1 Well management system
04/23/2003CN2546628Y Sucker rod rotary apparatus
04/23/2003CN2546627Y Automatic rotary wellhead apparatus
04/17/2003WO2002050571A3 Processing well logging data with neural network
04/17/2003WO2002048498A3 Enhanced oil recovery method using downhole gas
04/17/2003WO2002038916A9 An apparatus and method for determining downhole bit failure
04/17/2003US20030070807 In situ thermal processing of a coal formation to produce nitrogen and/or sulfur containing formation fluids
04/16/2003CN1410652A Wheel type hydraulic drifting machine
04/15/2003US6547011 Method and apparatus for controlling fluid flow within wellbore with selectively set and unset packer assembly
04/15/2003US6547010 Annular pack having mutually engageable annular segments
04/15/2003US6547006 Wellbore liner system
04/15/2003US6547005 System and a method of extracting oil
04/10/2003US20030066653 Method and apparatus for controlling well pressure in open-ended casing
04/10/2003US20030066649 Single well combination oil production/water dump flood apparatus and methods
04/10/2003US20030066644 In situ thermal processing of a coal formation using a relatively slow heating rate
04/10/2003US20030066643 Methods of downhole testing subterranean formations and associated apparatus therefor
04/10/2003US20030066642 In situ thermal processing of a coal formation producing a mixture with oxygenated hydrocarbons
04/09/2003EP0993539B1 Apparatus for and a method of drilling a lateral borehole
04/09/2003EP0975992A4 Pressure impulse telemetry apparatus and method
04/09/2003CN1409799A System for producing de-watered oil
04/09/2003CN1408984A Method for determining stratum diameter of well hole of projection hole finished well
04/08/2003US6543546 Safety slip ram
04/08/2003US6543544 Low power miniature hydraulic actuator
04/08/2003US6543541 Access control between a main bore and a lateral bore in a production system
04/08/2003US6543540 Method and apparatus for downhole production zone
04/08/2003US6543536 Well reference apparatus and method
04/08/2003CA2316617C Method for biosolid disposal and methane generation
04/08/2003CA2277248C Portable flare stack
04/08/2003CA2097197C Plant for treating drill cuttings
04/03/2003US20030062198 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
04/03/2003US20030062164 In situ thermal processing of a hydrocarbon containing formation to produce nitrogen containing formation fluids
04/03/2003US20030062154 In situ production of synthesis gas from a hydrocarbon containing formation through a heat source wellbore
04/02/2003EP0871817B1 Apparatus for setting a liner in a well casing
04/01/2003US6540032 Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools
03/2003
03/27/2003WO2003025339A1 Device for cleaning an inner pipe inserted into a gas or oil conveying boring
03/27/2003US20030056950 Method for determining formation characteristics in a perforated wellbore
03/27/2003US20030056811 Coiled tubing wellbore cleanout
03/26/2003EP1296018A2 Lining a lateral wellbore
03/26/2003EP1295011A2 Apparatus and method to complete a multilateral junction
03/25/2003US6536524 Method and system for performing a casing conveyed perforating process and other operations in wells
03/20/2003US20030051918 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation
03/20/2003US20030051917 Roller cone bits, methods, and systems with anti-tracking variation in tooth orientation
03/20/2003US20030051877 Stackable guide funnel system and method
03/20/2003US20030051872 In situ thermal processing of a coal formation with heat sources located at an edge of a coal layer
03/19/2003CN2540505Y Wellhead offset apparatus
03/18/2003US6533040 Multi-function apparatus for adding a branch well sealed liner and connector to an existing cased well at low cost
03/14/2003CA2357515A1 Eze-raiser
03/13/2003US20030048697 Power generation using batteries with reconfigurable discharge
03/13/2003US20030047308 Wireless downwhole measurement and control for optimizing gas lift well and field performance
03/12/2003CN1402810A Production valve
03/11/2003US6531694 Wellbores utilizing fiber optic-based sensors and operating devices
03/06/2003WO2002038915A3 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator
03/06/2003US20030042026 Controllable production well packer
03/06/2003US20030042024 Methods and associated apparatus for drilling and completing a wellbore junction
03/05/2003EP1287228A1 Wellbore liner system
03/05/2003EP1287227A1 Downhole window finder and method of using the same
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