| 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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| 07/17/1997 | WO1997025517A1 Flow meter |
| 07/17/1997 | WO1997025515A1 Release mechanism |
| 07/17/1997 | WO1997025242A1 Spacing buoy for flexible risers |
| 07/17/1997 | WO1997025150A1 Cyclonic separator assembly and method |
| 07/17/1997 | CA2242307A1 Release mechanism |
| 07/17/1997 | CA2241419A1 Cyclonic separator assembly and method |
| 07/16/1997 | CN2257858Y Fine filter of water filling well |
| 07/16/1997 | CN1154733A Process and device for raising liquids from wells |
| 07/16/1997 | CN1154731A Device and method for making a slot in an underground formation |
| 07/15/1997 | US5648635 For a perforating gun |
| 07/10/1997 | WO1997024615A1 Automatic well test system and method of operating the same |
| 07/10/1997 | WO1997024509A1 Flameless combustor |
| 07/09/1997 | EP0783075A2 Method and apparatus for producing hydrocarbons |
| 07/09/1997 | EP0783074A2 Connection between base pipe and screen in downhole filter |
| 07/09/1997 | CN1153863A Adapter for oil well tubings |
| 07/08/1997 | US5646337 Method and device for measuring parameters of plastic ground |
| 07/08/1997 | US5645692 Process for the stabilization of crude oils at the outlet of the extraction well and device for implementation thereof |
| 07/08/1997 | US5645322 In-situ chemical reactor for recovery of metals and salts |
| 07/03/1997 | DE19538250A1 Method of laying water pipelines |
| 07/02/1997 | EP0781894A2 Method and apparatus for well servicing |
| 07/02/1997 | EP0781893A2 Apparatus and method for early evaluation and servicing of a well |
| 07/02/1997 | CN2257326Y Airlift ball airlift recovery ball control wheel ball serving device |
| 07/02/1997 | CN1153251A Eccentric water-nozzle oil-nozzle water distributor and pulling and running tool |
| 07/02/1997 | CN1035307C Multi-layer composite screen |
| 07/01/1997 | US5643449 Endless loop of oil absorbing material extending vertically downward with drive and controller to maintain its depth in response to variations in depth of interface between two liquids |
| 07/01/1997 | US5642990 Downhole pump apparatus |
| 07/01/1997 | US5642781 Multi-passage sand control screen |
| 07/01/1997 | CA2029312C Thermal barriers for enhanced oil recovery |
| 07/01/1997 | CA2006786C Composition for selective placement of polymer gels for profile control in thermal oil recovery |
| 07/01/1997 | CA2006785C Method for preventing steam channelling into a non-aquifer bottom water zone |
| 06/27/1997 | CA2193270A1 Method of well testing by obtaining a non-flashing fluid sample |
| 06/26/1997 | WO1997022780A1 Catenary riser system |
| 06/26/1997 | CA2240690A1 New water-swellable preparations of guar and guar derivatives in oleophilic liquids and their use |
| 06/25/1997 | EP0780166A1 Method and appararus for remediation of contaminated soil |
| 06/25/1997 | CN1152587A Method for preparation of polymer oil-displacing agent |
| 06/24/1997 | US5641941 Method and apparatus for electrical connections to encased electronic devices |
| 06/24/1997 | US5641245 Apparatus for passive removal of subsurface contaminants |
| 06/24/1997 | US5641020 Treatment of contaminated water in clays and the like |
| 06/24/1997 | CA2021150C Use of c02/steam to enhance steam floods in horizontal wellbores |
| 06/19/1997 | WO1997021903A1 Apparatus and method for forming a window or an outline thereof in the casing of a cased wellbore |
| 06/19/1997 | WO1997021901A2 Tubing connector |
| 06/19/1997 | WO1997021900A1 Fluid drilling system |
| 06/19/1997 | WO1997017524A3 Deformable well screen and method for its installation |
| 06/17/1997 | US5639806 Phenolic resin propellant |
| 06/17/1997 | US5639380 System for automating groundwater recovery controlled by monitoring parameters in monitoring wells |
| 06/17/1997 | US5639187 Marine steel catenary riser system |
| 06/17/1997 | US5638902 Subterranean geology formations; enhanced oil recovery |
| 06/17/1997 | US5638901 Perforating gun for carrying shaped charge explosives |
| 06/12/1997 | WO1997021055A1 A sub-sea pumping system and an associated method |
| 06/12/1997 | WO1997021017A1 Riser system |
| 06/12/1997 | DE19617213C1 Bending shaft connection for pump rotor or drill head |
| 06/11/1997 | EP0778393A2 Method and apparatus for maintaining the performance of new water wells and for cleaning and regeneration of excisting water wells by means of ultrasound |
| 06/11/1997 | CN2256034Y Air and water separating stabilizer for mining drill |
| 06/11/1997 | CN2256033Y Production apparatus using oil pipe telescopic joint |
| 06/11/1997 | CN1151704A Suppression of slug flow in a multi-phase fluid stream |
| 06/10/1997 | US5636693 Gas well tubing flow rate control |
| 06/10/1997 | US5636692 Casing window formation |
| 06/10/1997 | US5636691 Abrasive slurry delivery apparatus and methods of using same |
| 06/10/1997 | US5636688 Self aligning stuffing box for pumpjack units |
| 06/05/1997 | WO1997020130A2 Downhole apparatus and method for expanding a tubing |
| 06/05/1997 | WO1997020129A1 Method of treating an underground formation |
| 06/04/1997 | CN1150992A Flushing filling anti-sand process technology |
| 06/03/1997 | US5635712 Method for monitoring the hydraulic fracturing of a subterranean formation |
| 06/03/1997 | US5634984 Contacting with solution containing two surfactants with different hydrophilic-lipophilic balance values and nonpolar diluent oil, rinsing with water |
| 06/03/1997 | US5634522 Liquid level detection for artificial lift system control |
| 06/03/1997 | US5634521 Valve assembly for downhole hydraulically actuated pump |
| 06/03/1997 | US5634520 Varying water to gas ratios for efficient increase of oil mobility |
| 05/28/1997 | EP0775535A2 Improved apparatus for high vacuum groundwater extraction |
| 05/28/1997 | CN2254953Y Fork type air ball giving device for air-ball type air lifting oil prodn. |
| 05/28/1997 | CN2254952Y Metallic wool wriggling type sand filtration pipe |
| 05/28/1997 | CA2185499A1 Lignosulfonate-acrylic acid graft copolymers as sacrificial agents for carbon dioxide foaming abents |
| 05/27/1997 | US5633475 Circulation shaped charge |
| 05/27/1997 | US5632348 Fluid activated detonating system |
| 05/27/1997 | US5632336 Method for improving injectivity of fluids in oil reservoirs |
| 05/27/1997 | CA2043327C Method and apparatus for removal of floating immiscible liquids |
| 05/21/1997 | EP0774565A2 Downhole arrangement for acquiring well information |
| 05/21/1997 | EP0774042A1 Method of fracturing and propping a formation |
| 05/21/1997 | EP0774039A1 Device and method for making a slot in an underground formation |
| 05/21/1997 | CN1150211A Dual redundant detonating system for oil well perforators |
| 05/20/1997 | US5630474 Enhanced oil recovery using aqueous emulsion containing polysiloxane and surfactant |
| 05/15/1997 | WO1997017527A2 Downhole setting tool for an expandable tubing |
| 05/15/1997 | WO1997017526A2 Downhole assembly for installing an expandable tubing |
| 05/15/1997 | WO1997017525A1 Deep well filters |
| 05/15/1997 | WO1997017524A2 Deformable well screen and method for its installation |
| 05/15/1997 | DE19628950A1 Deep drilling machine |
| 05/14/1997 | EP0773343A2 Extreme overbalanced perforating and fracturing process using low-density, neutrally buoyant proppant |
| 05/14/1997 | EP0772696A1 Method for removing alkaline sulfate scale |
| 05/14/1997 | EP0772665A1 Method of enriching the methane content of a mine gas |
| 05/13/1997 | US5628624 Pump barrel valve assembly including seal/actuator element |
| 05/13/1997 | US5628366 Protective arrangements for downhole tools |
| 05/13/1997 | US5628365 Method of producing gas from fluid containing beds |
| 05/13/1997 | US5628364 Comprising an air pump to draw subterranean gases and moisture through shaft as needed in response to detection of bioremediation fluid depth; noncontamination of water table |
| 05/10/1997 | CA2189085A1 Completion apparatus and method |
| 05/09/1997 | WO1997016624A1 Producing well artificial lift system control |
| 05/09/1997 | WO1997016623A1 Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir |
| 05/09/1997 | CA2236264A1 Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir |
| 05/07/1997 | EP0771935A1 Proppants with fiber reinforced resin coatings |
| 05/06/1997 | US5627144 Composition for enhanced crude oil recovery operations containing hydrochloric acid or hydrofluoric acid, or mixtures thereof with ester quaternary ammonium compounds or/and alkyl quaternary ammonium compounds |
| 05/06/1997 | US5626193 Method for recovering heavy oil from reservoirs in thin formations |
| 05/06/1997 | US5626191 Oilfield in-situ combustion process |