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)
05/1997
05/01/1997WO1997001018A3 Downhole apparatus for generating electrical power in a well
04/1997
04/29/1997US5624502 Storage wash water in vessel, cleaning the floating vessel, transmitting contaminated wash water, introducing coagulating cation polymer, settling, concentrating, decanting and separation
04/29/1997US5624209 Land reclamation method and equipment involving the introduction and mixing of a fluid and substances dispersed in air
04/24/1997WO1997014868A1 Purging means for purging upwards in ring spacing between drill pipe and bore hole wall
04/24/1997WO1997014765A1 Method for extracting oil from oil-contaminated soil
04/22/1997US5622231 Cutting head
04/22/1997US5622222 For use in a corrosive environment
04/17/1997WO1997013593A1 A method for introducing materials into a solid or semi-solid medium
04/17/1997CA2239978A1 A method for introducing materials into a solid or semi-solid medium
04/09/1997EP0677137B1 Data and signal transmitting installation for controlling and monitoring underwater ramming and cutting-off machinery, or the like
04/03/1997WO1997012117A1 System for selective re-entry to completed laterals
04/03/1997WO1997012113A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
04/03/1997WO1997012112A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access
04/01/1997US5615740 Casting assembly for use in drilling lateral boreholes
03/1997
03/27/1997WO1997011393A1 Method for obtaining a representation of the textures of a geological structure
03/27/1997CA2183613A1 Scavenger system and electrical submersible pumps (esp's)
03/25/1997US5613559 Decentralizing centralizing locating and orienting subsystems and methods for subterranean multilateral well drilling and completion
03/18/1997US5613242 Dissolving in water under high temperature and pressure salts, grinding to microemulsions and acid treatment
03/13/1997WO1997009685A1 Method of optimizing component layout using a hierarchical series of models
03/12/1997EP0762606A2 Improvements in or relating to electrical machines
03/12/1997EP0760895A1 Lateral drilling method
03/11/1997CA2101982C Selective downhole operating system and method
02/1997
02/27/1997WO1997007318A1 Through-tubing lateral re-entry
02/26/1997EP0639240B1 Microencapsulated oil field chemicals and process for their use
02/25/1997US5605193 Downhole gas compressor
02/20/1997WO1997006347A1 Above production disposal tool
02/20/1997WO1997006345A1 Device and process for the lining of a pipe branch, particularly in an oil well
02/19/1997CN1143420A Sensor arrangement for controlling vehicle ventilation system
02/18/1997US5603378 Well cleaning tool
02/13/1997WO1997005397A1 Device for interconnection of two objects
02/12/1997EP0757632A1 Sensor arrangement for controlling vehicle ventilation systems
02/06/1997WO1997004211A1 Lightweight intervention system
02/06/1997WO1997004208A1 Branch boreholes
01/1997
01/28/1997US5597016 Mechanical lockout for pressure responsive downhole tool
01/14/1997US5593249 Diverless flowline connection system
01/09/1997WO1997001018A2 Downhole apparatus for generating electrical power in a well
01/07/1997US5590716 Oil wells
12/1996
12/31/1996US5589603 Method and apparatus for the injection disposal of solid and liquid waste materials from the drilling and production of oil and gas wells
12/31/1996US5588488 Cementing multi-lateral wells
12/24/1996US5586729 Hazardous wastes disposal
12/19/1996WO1996041104A2 System for geothermal production of electricity
12/19/1996CA2221376A1 System for geothermal production of electricity
12/18/1996CN1138361A Formation injection tool for down-bore in-situ disposal
12/11/1996EP0747570A1 Mid pulse valve for measurement-while-drilling system
12/11/1996EP0747568A2 Logging-while-drilling tool
12/10/1996US5582118 Removal of organic contaminants from solid particles
12/05/1996WO1996038688A1 Tool, tool system and method for coupling and installing subsea pipelines
12/03/1996US5579838 Above production disposal tool
11/1996
11/28/1996WO1996024752A3 Method and appartus for remote control of wellbore end devices
11/26/1996US5579283 Method and apparatus for communicating coded messages in a wellbore
10/1996
10/29/1996US5568838 Of a subterranean formation
10/29/1996US5568836 Release device for releasably coupling a first object to a second object
10/24/1996WO1996033296A1 Method for inhibiting microbially influenced corrosion
10/23/1996EP0738365A1 Formation injection tool for down-bore in-situ disposal
10/22/1996US5566763 Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion
10/22/1996US5566756 Method for recovering methane from a solid carbonaceous subterranean formation
10/17/1996WO1996024745A3 Computer controlled downhole tools for production well control
10/16/1996EP0469140B1 Device for protecting wells from corrosion or deposits caused by the nature of the fluid produced or located therein
10/15/1996US5564509 Oil and gas well cuttings disposal system
10/15/1996US5564503 Methods and systems for subterranean multilateral well drilling and completion
10/03/1996WO1996030625A1 Hydrocarbon production using multilateral well bores
10/01/1996US5560436 Single drilling guide base for subsea oil wells
09/1996
09/26/1996WO1996029532A1 Method for connecting underwater pipelines particularly suitable for great depths and big diameters
09/26/1996CA2216108A1 Method for connecting underwater pipelines particularly suitable for great depths and big diameters
09/25/1996EP0733843A1 Method for connecting underwater pipelines particularly suitable for great depths and big diameters
09/24/1996US5558162 Mechanical lockout for pressure responsive downhole tool
09/10/1996US5553678 Modulated bias units for steerable rotary drilling systems
09/07/1996CA2153202A1 Corrosion control well installations and tools for such installations
09/06/1996WO1996027070A1 Oil well treatment
09/06/1996CA2213698A1 Oil well treatment
08/1996
08/28/1996EP0728908A2 Steerable rotary drilling system
08/20/1996US5547311 Cathodic protection, leak detection, and thermal remediation system
08/20/1996US5547020 Corrosion control well installation
08/15/1996WO1996024752A2 Method and appartus for remote control of wellbore end devices
08/15/1996WO1996024751A1 An acoustic transmisson system
08/15/1996WO1996024749A1 Method and apparatus for the remote control and monitoring of production wells
08/15/1996WO1996024747A1 Downhole production well control system and method
08/15/1996WO1996024745A2 Computer controlled downhole tools for production well control
08/15/1996CA2187423A1 An acoustic transmisson system
08/08/1996WO1996023953A1 Multiple drain drilling and production apparatus
08/08/1996CA2210852A1 Multiple drain drilling and production apparatus
07/1996
07/25/1996WO1996022451A1 Oil and gas field chemicals
07/16/1996US5536115 Generating multiple hydraulic fractures in earth formations for waste disposal
07/16/1996CA2005301C Method of treating solids containing waste fluid
07/09/1996US5533573 Method for completing multi-lateral wells and maintaining selective re-entry into laterals
07/02/1996US5531270 For controlling fluid flow in a well
06/1996
06/26/1996EP0718466A1 Downhole tool with hydraulic timer
06/18/1996US5526880 Method for multi-lateral completion and cementing the juncture with lateral wellbores
06/18/1996CA2053377C Subsea production system
06/11/1996US5524713 Drill rig having alternate spindle drive
06/11/1996US5524709 Method for acoustically coupling sensors in a wellbore
05/1996
05/29/1996EP0713954A2 Perforating gun actuator
05/28/1996US5520252 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells
05/23/1996CA2163410A1 Perforating gun actuator
05/21/1996US5518073 Mechanical lockout for pressure responsive downhole tool
05/19/1996CA2162964A1 Method for enhanced cleanup of horizontal wells
05/15/1996EP0680388A4 Subterranean disposal of liquid and slurried wastes.
05/15/1996CN2227194Y Assembly preventer for oil recovery well head
05/14/1996US5517464 Integrated modulator and turbine-generator for a measurement while drilling tool
05/07/1996US5513570 Pressure actuated pipe cutting tool
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