| Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186) |
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| 02/16/1999 | US5871051 Method and related apparatus for retrieving a rotary pump from a wellbore |
| 02/16/1999 | US5871050 Well completion method |
| 02/16/1999 | US5871049 Control of fine particulate flowback in subterranean wells |
| 02/16/1999 | US5871048 Determining an optimum gas injection rate for a gas-lift well |
| 02/11/1999 | WO1999006670A1 Creating zonal isolation between the interior and exterior of a well system |
| 02/11/1999 | WO1999006669A1 Wire-wrapped well screen |
| 02/10/1999 | EP0896124A1 System of multiple-purpose tools for the connection of pipes |
| 02/10/1999 | EP0895561A1 Method and apparatus for remote control of multilateral wells |
| 02/10/1999 | CN2307102Y Underground oil-water-separating water-filling oil-obtaining device |
| 02/10/1999 | CN1042053C High-efficiency energy-saving lever oil pumping machine |
| 02/09/1999 | US5869435 Compositions for fracturing subterranean formations |
| 02/09/1999 | US5868557 For the remediation of a site contaminated with a hazardous substance |
| 02/09/1999 | US5868210 Method for recovering hydrocarbons from earth formations |
| 02/09/1999 | US5868202 Hydrologic cell used to faciliate the injection of fluid into and removal of fluid from the host rock; two aquifiers in parallel layout with host rock in between; in situ secondary recovery of hydrocarbons or thermal energy for electricity |
| 02/09/1999 | US5868201 Computer controlled downhole tools for production well control |
| 02/09/1999 | US5868200 Alternate-path well screen having protected shunt connection |
| 02/08/1999 | CA2244550A1 Multi-tool system that can be used for connecting pipes |
| 02/08/1999 | CA2241279A1 Well completion and production techniques |
| 02/04/1999 | WO1999005390A1 Releasable connector assembly for a perforating gun |
| 02/04/1999 | WO1999005387A2 Variable choke for use in a subterranean well and method of controlling a fluid flow |
| 02/04/1999 | WO1999005385A2 Seal arrangement |
| 02/04/1999 | WO1998050680A3 Monitoring of downhole parameters and tools utilizing fiber optics |
| 02/03/1999 | EP0894938A1 Device for transferring fluids between the sea bottom and the surface |
| 02/03/1999 | EP0894195A1 Progressive cavity pumps using composite materials |
| 02/03/1999 | CN2306335Y Long stroke beam-pumping unit |
| 02/03/1999 | CN2306315Y Under-pump blending liquid mixer |
| 02/02/1999 | US5865254 For use in a string of tools |
| 02/02/1999 | US5865252 Method of completing a well |
| 02/02/1999 | US5865251 Isolation system and gravel pack assembly and uses thereof |
| 02/02/1999 | US5865248 Chemically induced permeability enhancement of subterranean coal formation |
| 02/02/1999 | US5865247 Cellulose injection system and method |
| 02/02/1999 | US5865245 Stuffing box gland |
| 01/28/1999 | WO1999004137A1 Simultaneous production and water injection well system |
| 01/28/1999 | WO1999004135A1 Deformed multiple well template and process of use |
| 01/28/1999 | CA2240990A1 Dual inlet and lifting system using progressing cavity pumps |
| 01/27/1999 | EP0892886A1 Installation for pumping a two-phase liquid/gas effluent |
| 01/27/1999 | EP0819207A4 Method for improved water well production |
| 01/27/1999 | CN1206447A Flameless combustor |
| 01/26/1999 | US5862869 Non-cryogenic nitrogen for on-site downhole drilling and post drilling operations |
| 01/26/1999 | US5862865 Method of converting an existing well |
| 01/26/1999 | US5862863 Dual completion method for oil/gas wells to minimize water coning |
| 01/26/1999 | US5862858 Flameless combustor |
| 01/26/1999 | US5862758 Insert and twist method and apparatus for securing a shaped charge to a loading tube of a perforating gun |
| 01/26/1999 | CA2153643C Sleeve valve flow control device with locator shifter |
| 01/21/1999 | WO1999002819A1 Computer controlled injection wells |
| 01/21/1999 | WO1999002818A1 Downhole tubing |
| 01/21/1999 | WO1999002815A1 Device and method for creating ramifications in a bore hole |
| 01/20/1999 | EP0891468A1 Pump-off controller |
| 01/20/1999 | EP0853508A4 A method for introducing materials into a solid or semi-solid medium |
| 01/20/1999 | CN1205388A Method and apparatus for acquiring data in hydrocarbon well |
| 01/20/1999 | CN1205387A Use of unmodified kraft lignin amine and water-soluble sulfonate composition in enhanced oil recovery |
| 01/19/1999 | US5860864 For connecting two spaced drive shafts |
| 01/19/1999 | US5860795 Method for underground-reservoir fluids production with pump drive contained within the wellbore |
| 01/19/1999 | US5860767 High-vacuum groundwater and soil remediation system and related method and apparatus |
| 01/19/1999 | US5860476 Method and apparatus for separating a well stream |
| 01/19/1999 | US5860475 Mixed well steam drive drainage process |
| 01/19/1999 | US5860474 Method for recompleting a cased wellbore containing a casing |
| 01/19/1999 | CA2120366C Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 01/14/1999 | WO1999001667A1 Hydraulically driven oil well pump |
| 01/14/1999 | WO1999001640A1 Method for exploiting gas and oil fields and for increasing gas and crude oil output |
| 01/13/1999 | EP0755498B1 Facility for effecting energy exchange between the ground and an energy exchanger |
| 01/13/1999 | EP0755497B1 Facility for effecting energy exchange between the ground and an energy exchanger |
| 01/12/1999 | US5859383 Electrically activated, metal-fueled explosive device |
| 01/12/1999 | US5857807 Municipal solid waste landfill system |
| 01/12/1999 | US5857524 Liner hanging, sealing and cementing tool |
| 01/12/1999 | US5857521 Method of using a retrievable screen apparatus |
| 01/12/1999 | US5857519 Downhole disposal of well produced water using pressurized gas |
| 01/12/1999 | CA2160668C Tubing rotator and hanger |
| 01/07/1999 | WO1999000579A1 Method and system for offshore production of hydrocarbon fluids |
| 01/07/1999 | WO1998045009A3 Filter for subterranean use |
| 01/07/1999 | EP0888489A1 Hydrocarbon recovery method using inverted production wells |
| 01/06/1999 | CN1204380A Scale inhibition by squeeze application of phosphonomethylated polyamine inhibitor |
| 01/06/1999 | CN1204379A Tubing connector |
| 01/06/1999 | CN1204378A Fluid drilling system |
| 01/05/1999 | US5855775 Microporous diffusion apparatus |
| 01/05/1999 | US5855243 Method for recovering hydrocarbons from a subterranean formation |
| 01/05/1999 | US5855242 Prepacked flush joint well screen |
| 01/05/1999 | CA2164464C Offshore well gas disposal |
| 01/05/1999 | CA2023784C Method for the removal of aqueous liquids from the sump of an underground cavity |
| 01/03/1999 | CA2208046A1 Method for recovering and concurrently partly upgrading heavy oils, bitumens and oil shale organic matter, and for extracting certain wastes |
| 12/30/1998 | WO1998059153A1 Cyclonic separator assembly |
| 12/30/1998 | WO1998059152A1 Calliope oil production system |
| 12/30/1998 | WO1998059151A1 Tubular preform for well tubing |
| 12/30/1998 | EP0886720A1 Underwater installation and method for building of an underwater installation |
| 12/30/1998 | EP0886719A1 A process and a formulation to inhibit scale in oil field production |
| 12/30/1998 | EP0853651A4 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 12/30/1998 | CN2302335Y Multi-function gas-steam generator |
| 12/30/1998 | CN2302334Y Petroleum efficient electric heater |
| 12/30/1998 | CN2302333Y Oil well multi-layer waterflooding and detecting appliances |
| 12/30/1998 | CN2302332Y Antitheft oil extraction tree |
| 12/30/1998 | CN1203654A Sub-sea pumping system and associated method |
| 12/30/1998 | CN1203648A Piston valve |
| 12/30/1998 | CN1203308A Chemically induced permeability enhancement of subterranean coal formation |
| 12/29/1998 | US5853224 Method for completing a well in a coal formation |
| 12/29/1998 | US5853049 Horizontal drilling method and apparatus |
| 12/29/1998 | US5853048 Control of fine particulate flowback in subterranean wells |
| 12/29/1998 | CA2158814C Perforating charge carrier assembly |
| 12/23/1998 | WO1998058156A1 Method and apparatus for subterranean magnetic induction heating |
| 12/23/1998 | EP0886035A2 Method of enhanced recovery of hydrocarbons in an underground formation |
| 12/23/1998 | EP0885346A1 Method and well tool for gravel packing a well using low-viscosity fluids |