| 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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| 02/06/1995 | CA2108526A1 Ground fracturing probe |
| 02/02/1995 | WO1995003476A1 Method of finishing wells |
| 02/02/1995 | DE4428936A1 Process for the remediation of soil or material zones |
| 02/01/1995 | EP0636229A1 Compressing gas flowing through a conduit. |
| 02/01/1995 | EP0636228A1 Compressing combustible gas flowing through a conduit |
| 02/01/1995 | EP0431085B1 Method of decontaminating earth |
| 02/01/1995 | CN2188649Y Perforator |
| 02/01/1995 | CN1098163A Non-shell press-cracking bomb |
| 01/31/1995 | CA2083054C Foam for improving sweep efficiency in subterranean oil-bearing formations |
| 01/27/1995 | CA2101299A1 Vertical bore hole system and method for waste storage and energy recovery |
| 01/26/1995 | WO1995002735A1 Plant for the gathering up of natural existing groundwater and/or for the maintenance of natural existing groundwater levels |
| 01/24/1995 | US5383747 System for treating a subterranean formation having an aquifer contaminated with organics |
| 01/19/1995 | WO1995001904A1 System for offshore production of hydrocarbons |
| 01/18/1995 | EP0634561A1 Sand screen for use in wells |
| 01/17/1995 | US5382371 Polymers useful in the recovery and processing of natural resources |
| 01/17/1995 | US5382141 In a subsea station for transporting a well stream |
| 01/17/1995 | US5381865 Subsea well tender system |
| 01/17/1995 | US5381864 Well treating methods using particulate blends |
| 01/17/1995 | US5381863 Cyclic huff-n-puff with immiscible injection and miscible production steps |
| 01/17/1995 | US5381861 Drive head for flexible conveyor fluid lifting system |
| 01/17/1995 | US5381631 Method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet |
| 01/17/1995 | CA1334013C Copolymers of (meth) acrylic acid esters as flow improvers in petroleum oils |
| 01/12/1995 | WO1995001497A1 Telescoping conduits for increasing the fluid resistance of well production tubing |
| 01/12/1995 | WO1995001232A1 In-situ remediation of contaminated heterogeneous soils |
| 01/11/1995 | EP0632867A1 Methods and apparatus for recovering pollutants |
| 01/11/1995 | EP0425568B1 Apparatus and method for detonating well perforators |
| 01/10/1995 | US5380127 Non-entry method of underground excavation in weak or water bearing grounds |
| 01/10/1995 | US5380126 Method of and arrangement for rinsing out impurities from ground |
| 01/10/1995 | US5380125 Fluid extraction device |
| 01/10/1995 | US5379844 Offshore platform well system |
| 01/10/1995 | US5379841 Injection of copolymer based on vinyl acetamide and acrylamidoalkylenesulfonate |
| 01/10/1995 | US5379838 Apparatus for centralizing pipe in a wellbore |
| 01/10/1995 | CA2075248C Module of satellite tree and flow line structure for interconnection of a satellite well to a subsea production system |
| 01/10/1995 | CA2021891C Pressure balanced cartridge choke valve |
| 01/05/1995 | WO1995000741A1 Process for extracting hydrocarbons from subterranean formations |
| 01/05/1995 | WO1995000739A1 Selective zonal isolation of oil wells |
| 01/05/1995 | WO1995000475A1 Surfactant, process for its production and use |
| 01/05/1995 | CA2143311A1 Process for extracting hydrocarbons from subterranean formations |
| 01/03/1995 | US5377764 Means of injecting CO2 into circulation tubing to facilitate CO2 gas lift |
| 01/03/1995 | US5377761 Ground fracturing probe |
| 01/03/1995 | US5377758 Method for effective placement of a long life scale inhibitor |
| 01/03/1995 | US5377756 Method for producing low permeability reservoirs using a single well |
| 01/03/1995 | US5377754 Progressive fluid sampling for boreholes |
| 01/03/1995 | US5377750 Sand screen completion |
| 01/03/1995 | US5377749 Apparatus for setting hydraulic packers and for placing a gravel pack in a downhole oil and gas well |
| 01/03/1995 | US5377714 Device and method for transferring a multiphase type effluent in a single pipe |
| 01/03/1995 | CA2025541C Non-aqueous viscosified carbon dioxide and method of use |
| 12/28/1994 | CN2186297Y Steam power acoustic wave generator for oil extraction |
| 12/28/1994 | CN2186296Y Rod hydraulic unload apparatus of beam-pumping unit |
| 12/28/1994 | CN2186295Y Gravity compressed drip |
| 12/27/1994 | US5377104 Passive seismic imaging for real time management and verification of hydraulic fracturing and of geologic containment of hazardous wastes injected into hydraulic fractures |
| 12/27/1994 | US5375662 For applying hydraulic pressure to an operated well |
| 12/27/1994 | US5375661 Well completion method |
| 12/27/1994 | US5375657 Chain long-stroke oil-well pumping unit |
| 12/27/1994 | US5375656 Low flow rate oil supply system for an electric submersible pump |
| 12/27/1994 | US5375618 Multiphase fluid regulating and distributing device |
| 12/27/1994 | US5375478 For several separate testing points |
| 12/22/1994 | WO1994029572A1 Method and apparatus for communicating coded messages in a wellbore |
| 12/22/1994 | WO1994029571A1 Down hole jet pump |
| 12/22/1994 | WO1994029566A1 Non-cryogenic production of nitrogen for on-site injection in downhole drilling |
| 12/22/1994 | WO1994029562A1 Scoophead/diverter assembly for completing lateral wellbores |
| 12/22/1994 | CA2149244A1 Non-cryogenic production of nitrogen for on-site injection in downhole drilling |
| 12/22/1994 | CA2142112A1 Scoophead/diverter assembly for completing lateral wellbores |
| 12/21/1994 | EP0629769A2 Method and apparatus for leaching out cavities in salt formations |
| 12/21/1994 | EP0629261A1 Well uplift system |
| 12/21/1994 | EP0629141A1 Removing volatile organic compounds from groundwater |
| 12/21/1994 | CN2185793Y Air feed device for underground controlled combustion oil recovery |
| 12/21/1994 | CN2185792Y Reciprocating oil pump |
| 12/20/1994 | US5374163 Down hole pump |
| 12/20/1994 | US5373899 Compatible fluid gravel packing method |
| 12/20/1994 | US5373897 Underground fluid recovery device |
| 12/14/1994 | EP0628699A1 Well perforation and completion |
| 12/14/1994 | CN2185320Y 过滤器 Filter |
| 12/13/1994 | US5372488 Oil well pump with radially expandable interlocking seal ring |
| 12/13/1994 | US5372462 Placing foam comprising uncrosslinked polymer, surfactant, aqueous solvent, gas in soil treatment region |
| 12/13/1994 | US5372208 Tube section having slots for sampling |
| 12/13/1994 | US5372200 Method and apparatus for sealing a wellbore or well casing screen |
| 12/13/1994 | US5372198 Abandonment of sub-sea wells |
| 12/13/1994 | US5372195 Method for directional hydraulic fracturing |
| 12/13/1994 | US5372194 Method of and means for operating geothermal wells |
| 12/13/1994 | US5372190 Down hole jet pump |
| 12/13/1994 | US5372038 Probe to specifically determine the injectivity or productivity of a petroleum well and measuring method implementing said probe |
| 12/09/1994 | CA2097988A1 Eccentrically actuated perforating guns |
| 12/08/1994 | WO1994028284A1 Sand screen structure |
| 12/08/1994 | WO1994028086A1 White mineral oil-based drilling fluid |
| 12/08/1994 | WO1994027699A2 Oilmaster-2 plant for separation of emulsions respectively light-weight hydrocarbons and their aromatics |
| 12/08/1994 | WO1994021889A3 Improvements in or relating to drilling and to the extraction of fluids |
| 12/08/1994 | CA2163754A1 Sand screen structure |
| 12/07/1994 | EP0627545A2 Annular safety system for cased well |
| 12/07/1994 | CN2184779Y Multifunction hydraulic oil pipe anchor |
| 12/07/1994 | CN2184777Y Inner and outer self closing high pressure steam injection valve |
| 12/06/1994 | US5370477 In-situ decontamination with electromagnetic energy in a well array |
| 12/06/1994 | US5370188 Borehole assembly, method and composition therefor |
| 12/06/1994 | US5370187 Over-pressured well fracturing method |
| 12/06/1994 | US5370186 Apparatus and method of perforating wellbores |
| 12/06/1994 | US5370182 Thermal extraction system and method |
| 12/06/1994 | US5370179 Drive head for rotary down hole pump |
| 12/06/1994 | CA2046107C Laterally and vertically staggered horizontal well hydrocarbon recovery method |
| 12/06/1994 | CA2033492C Enhanced oil recovery system with a radiant tube heater |
| 12/05/1994 | CA2097790A1 Fines control in deviated wells |