| 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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| 02/20/1997 | WO1996038649A3 Activating means for a down-hole tool |
| 02/20/1997 | DE19543534C1 Controlled gas explosion method to increase ground porosity |
| 02/20/1997 | DE19530060A1 Water extraction system for narrow boreholes with diameter from 22 mm and depths greater than 10 m |
| 02/20/1997 | CA2228646A1 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
| 02/19/1997 | CN1143087A Resin coated product containing bisphenol and its using method |
| 02/18/1997 | USRE35454 Apparatus and method for separating solid particles from liquids |
| 02/18/1997 | US5604186 Introducing aqueous fracturing fluid into contact with enzyme breaker comprising particulate cellulose substrate coated with enzyme solution and encapsulated by membrane of partially hydrolyzed crosslinked acrylic polymer |
| 02/18/1997 | US5604184 Chemically inert resin coated proppant system for control of proppant flowback in hydraulically fractured wells |
| 02/18/1997 | US5603384 Universal perforating gun firing head |
| 02/18/1997 | US5603379 Bi-directional explosive transfer apparatus and method |
| 02/13/1997 | WO1997005360A1 Apparatus and process for drilling and completing multiple wells |
| 02/12/1997 | EP0757768A1 Device for permanent joining of tubes |
| 02/12/1997 | CN1142786A Solvent soaps and methods employing same |
| 02/11/1997 | US5601144 Apparatus for fluid recovery from plurality of wells |
| 02/11/1997 | CA2058255C Recovery and upgrading of hydrocarbons utilizing in situ combustion and horizontal wells |
| 02/06/1997 | WO1997004212A1 System for controlling production from a gas-lifted oil well |
| 02/06/1997 | WO1997004208A1 Branch boreholes |
| 02/06/1997 | WO1997004038A1 Non-toxic, inexpensive synthetic drilling fluid |
| 02/06/1997 | DE19532072C1 Verfahren zur Förderung, Lagerung und Abtransport von Erdöl Process for the production, storage and transportation of crude oil |
| 02/05/1997 | EP0656973A4 Method and apparatus for in-situ treatment of landfill waste and contaminated soil. |
| 02/05/1997 | EP0397874B1 Device for closing off a complication zone in a well |
| 02/05/1997 | EP0397870B1 Method of casing the production seam in a well |
| 02/05/1997 | EP0353309B1 Method of constructing a well |
| 02/04/1997 | US5598894 Select fire multiple drill string tester |
| 02/04/1997 | US5598891 Apparatus and method for perforating and fracturing |
| 02/04/1997 | US5598890 Completion assembly |
| 01/29/1997 | EP0756065A1 System for controlling production from a gas-lifted oil well |
| 01/29/1997 | EP0755498A1 Facility for effecting energy exchange between the ground and an energy exchanger |
| 01/29/1997 | EP0755497A1 Facility for effecting energy exchange between the ground and an energy exchanger |
| 01/29/1997 | EP0668969B1 Sludger |
| 01/28/1997 | US5597974 Shaped charge for a perforating gun having a main body of explosive including TATB and a sensitive primer |
| 01/28/1997 | US5597784 Composite and reinforced coatings on proppants and particles |
| 01/28/1997 | US5597045 Process and tool for laying underground collector mains for liquids and gases |
| 01/28/1997 | US5597043 Method of completing wellbores to control fracturing screenout caused by multiple near-wellbore fractures |
| 01/28/1997 | US5597042 Method for controlling production wells having permanent downhole formation evaluation sensors |
| 01/28/1997 | US5597040 Combination gravel packing/frac apparatus for use in a subterranean well bore |
| 01/28/1997 | CA2182222A1 Process and system for transporting a fluid that may produce hydrates |
| 01/28/1997 | CA2040281C Wireline supported perforating gun enabling oriented perforations |
| 01/23/1997 | WO1997002404A1 Method of increasing the amount of hydrocarbons from an underground reservoir |
| 01/23/1997 | WO1997002403A1 Improvements in deep well pumping apparatus |
| 01/23/1997 | DE19625073A1 Digging=free system for laying underground drain seepage pipes |
| 01/23/1997 | CA2222842A1 Method of increasing the amount of hydrocarbons from an underground reservoir |
| 01/22/1997 | CN2245662Y Water service apparatus |
| 01/21/1997 | US5595246 One trip cement and gravel pack system |
| 01/21/1997 | US5595245 Systems of injecting phenolic resin activator during subsurface fracture stimulation for enhanced oil recovery |
| 01/21/1997 | US5595243 Acoustic well cleaner |
| 01/21/1997 | CA2087866C Drill stem testing with tubing conveyed perforation |
| 01/16/1997 | WO1997001684A1 Method of effecting fluid flow in porous materials |
| 01/15/1997 | EP0753648A2 Packer type groundwater sampling system and water sampling method |
| 01/15/1997 | CN2245115Y Vibratory oil increasing machine |
| 01/15/1997 | CN1140227A Oil production well and assembly of such wells |
| 01/14/1997 | US5593249 Diverless flowline connection system |
| 01/14/1997 | US5593248 Nontoxic chemical process for in situ permeability enhancement and accelerated decontamination of fine-grain subsurface sediments |
| 01/09/1997 | WO1997001017A1 Insulated and/or concentric coiled tubing |
| 01/09/1997 | WO1997000806A1 A rotating connector for operative connection between a buoy and a floating vessel for the production of hydrocarbons |
| 01/09/1997 | WO1997000805A1 A rotating connector with integrated lng course |
| 01/09/1997 | DE3791059C2 Cementing arrangement in well bore |
| 01/08/1997 | EP0752514A2 Selective perforation of multiple well zones |
| 01/08/1997 | EP0752049A1 Gas lift flow control device |
| 01/08/1997 | CN2244612Y Corrosion-resisting porous sand filtering pipe |
| 01/08/1997 | CN1139972A Hydrocarbon fluid transfort system |
| 01/08/1997 | CN1139908A A vessel for production and/or loading/unloading and transport of hydrocarbons from offshore fields, and/or carrying out well operations |
| 01/08/1997 | CN1139730A Sand control formula for low temp. oil layer coating sand |
| 01/07/1997 | US5590958 Automatic cementing system for precisely obtaining a desired cement density |
| 01/07/1997 | US5590723 Perforating charge carrier assembly |
| 01/07/1997 | US5590716 Oil wells |
| 01/06/1997 | CA2180515A1 Select fire multiple drill string tester |
| 01/02/1997 | EP0750717A1 Method and apparatus for production of subsea hydrocarbon formations |
| 01/02/1997 | DE19527664C1 Removing pollutants, e.g. heavy metal isotopes, from flowing ground-water |
| 01/01/1997 | CN2244096Y Super high pressure underground pulse efflux booster |
| 01/01/1997 | CN2244095Y Automatic control blasting and explosive insulation device |
| 01/01/1997 | CN1139470A Tension leg platform and method of installation therefor |
| 01/01/1997 | CN1139177A Regeneration technology for oil-field gun perforator barrel |
| 12/31/1996 | US5589633 Method and apparatus for measuring pumping rod position and other aspects of a pumping system by use of an accelerometer |
| 12/31/1996 | US5588490 For removing volatile contaminants in a two-dimensional configuration |
| 12/31/1996 | US5588487 Within a well bore |
| 12/31/1996 | US5588486 Down-hole gas separator for pump |
| 12/27/1996 | WO1996041671A1 Foamed glass filter |
| 12/27/1996 | WO1996032599A3 Pump barrel seal assembly including seal/actuator element |
| 12/27/1996 | EP0749517A1 Method of producing a fluid from an earth formation |
| 12/27/1996 | EP0584249B1 Overbalance perforating and stimulation method for wells |
| 12/27/1996 | CA2177340A1 Apparatus for limiting eccentric deviations of a polished rod in pumping applications |
| 12/25/1996 | CN2243532Y Slot sand creening pipe |
| 12/25/1996 | CN2243531Y Automatic controlling apparatus for mixing water and oil for oil swell system |
| 12/25/1996 | CN2243530Y Range-enlarging beam-pumping unit with rotary shaped head |
| 12/25/1996 | CN1138666A incline shaft petroleum oil-well pump |
| 12/24/1996 | US5586836 Bootstrapping process optimization for two phase vacuum extraction systems |
| 12/24/1996 | US5586602 Method and apparatus for shock wave stimulation of an oil-bearing formation |
| 12/19/1996 | WO1996041065A1 Method for downhole cyclone separation |
| 12/18/1996 | EP0748925A1 Method and device for casing a borehole with a deformable pipe |
| 12/18/1996 | EP0691878B1 Filter |
| 12/18/1996 | CN1138361A Formation injection tool for down-bore in-situ disposal |
| 12/17/1996 | US5586213 Ionic contact media for electrodes and soil in conduction heating |
| 12/17/1996 | US5584980 Electric field method and apparatus for decontaminating soil |
| 12/17/1996 | US5584605 Enhanced in situ hydrocarbon removal from soil and groundwater |
| 12/16/1996 | CA2151906A1 Well completion tool and process |
| 12/12/1996 | DE19520367A1 Filter Filter |
| 12/11/1996 | EP0747142A1 Vertical isolation system for two-phase vacuum extraction of soil and groundwater contaminants |
| 12/11/1996 | CN2242334Y Rotary spraying head for cleaning well |
| 12/11/1996 | CN1137816A Method for recovery of coal bed methane with reduced inert gas fraction in produced gas |