| 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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| 08/16/1994 | US5337828 Use of carbon dioxide for gas-lifting heavy oil |
| 08/16/1994 | US5337825 Antiswelling, deagglomerating the aluminous particles in a zone nearby by treating with a low alkaline solutions |
| 08/16/1994 | US5337823 Preform, apparatus, and methods for casing and/or lining a cylindrical volume |
| 08/16/1994 | US5337808 Technique and apparatus for selective multi-zone vertical and/or horizontal completions |
| 08/16/1994 | CA2070870C Stop for an oil well swabbing device |
| 08/10/1994 | CN2173861Y Automatic expansion oil drain device |
| 08/10/1994 | CN1090621A Method for soft tube connection of hot production well top in oil field |
| 08/10/1994 | CN1090620A Automatically continuous negative pressure gas producing technology |
| 08/10/1994 | CN1025636C Insert type negative pressure extracting device of oil well |
| 08/09/1994 | US5335732 Oil recovery combined with injection of produced water |
| 08/09/1994 | US5335730 Method for wellhead control |
| 08/09/1994 | US5335728 Method and apparatus for disposing of water at gas wells |
| 08/09/1994 | US5335727 Fluid loss control system for gravel pack assembly |
| 08/09/1994 | US5335724 Directionally oriented slotting method |
| 08/09/1994 | CA1331358C Process for the treatment of a polysaccharide-containing wash in order to increase its filtrability, and use of this wash in the assisted recovery of petroleum |
| 08/04/1994 | WO1994017280A1 Formation compatible fluid gravel packing method |
| 08/04/1994 | WO1994017279A1 Subsea wellhead connections |
| 08/04/1994 | WO1994017251A1 Device for collecting spillage and leakage, from shipwrecks |
| 08/03/1994 | EP0608238A1 Electro-vac decontamination process |
| 08/03/1994 | CN2173309Y Distributor for injecting water to oil well |
| 08/03/1994 | CN1090314A High temperature emulsified wax-inhibitor for deep oil-well and its preparation |
| 08/02/1994 | US5333698 Wellbore fluid containing oil additive |
| 08/02/1994 | US5333691 ROV installable junction plate and method |
| 08/02/1994 | US5333689 Flowing fluid loss agent into the well to form barrier, positioning a screen in said well adjuscent to formation, flowing gravel slurry which contains gelled hydrochoric acid reacts with fluid loss agent to remove barrier |
| 08/02/1994 | US5333688 Method and apparatus for gravel packing of wells |
| 08/02/1994 | US5333684 Downhole gas separator |
| 07/27/1994 | EP0607809A1 Multi-layer composite screen |
| 07/27/1994 | EP0607426A1 Process for producing highly viscous petroleum products and pumping them further |
| 07/27/1994 | EP0607241A1 Improvements relating to the placement of pipes in the ground |
| 07/27/1994 | CN1090011A Polymer enhanced foams for reducing gas coning |
| 07/26/1994 | US5332333 Vacuum extraction method and apparatus for removing volatile contaminants from the vadose layer of contaminated earth |
| 07/26/1994 | US5332045 Apparatus and method for placing and for backwashing well filtration devices in uncased well bores |
| 07/26/1994 | US5332039 Selective dual gravel pack |
| 07/26/1994 | US5332038 Gravel packing system |
| 07/26/1994 | US5332036 Method of recovery of natural gases from underground coal formations |
| 07/26/1994 | CA2031569C Method and means for introducing treatment fluid into a subterranean formation |
| 07/21/1994 | WO1994016198A1 Downhole roller vane motor and roller vane pump |
| 07/21/1994 | WO1994016195A1 Polymer enhanced foams for reducing gas coning |
| 07/21/1994 | WO1994016194A1 Method and apparatus for gravel packing a well |
| 07/21/1994 | WO1994015722A2 Permeable isolation sectioned screen |
| 07/20/1994 | EP0606428A1 Drive system for turning a swivel. |
| 07/20/1994 | CN2172343Y Well oil extracting unit without oil pipe |
| 07/19/1994 | US5330650 Dispersion polymers for oil field water clarification |
| 07/19/1994 | US5330293 Floating production and storage facility |
| 07/19/1994 | US5330007 Template and process for drilling and completing multiple wells |
| 07/19/1994 | US5330005 Control of particulate flowback in subterranean wells |
| 07/19/1994 | US5330004 Well treatment method and apparatus |
| 07/19/1994 | US5330003 Gravel packing system with diversion of fluid |
| 07/19/1994 | US5329999 For a cased well |
| 07/19/1994 | US5329998 For completing a well having a well bore intersecting an earth formation |
| 07/19/1994 | CA1330756C Safety valve for production well |
| 07/13/1994 | CN1089329A Energy conversion compensator for pumping unit well |
| 07/12/1994 | US5327975 Tubing anchor catcher with rotating mandrel |
| 07/12/1994 | US5327974 Method and apparatus for removing debris from a wellbore |
| 07/12/1994 | US5327973 Method for variable density acidizing |
| 07/12/1994 | US5327970 Method for gravel packing of wells |
| 07/12/1994 | US5327961 Drive head for downhole rotary pump |
| 07/12/1994 | US5327960 Gravel pack installations for wells |
| 07/12/1994 | US5327773 Method and apparatus for measuring steam density by neutron method |
| 07/12/1994 | CA2036295C Gas generator with improved ignition assembly |
| 07/07/1994 | WO1994015070A1 Methods for matrix acidizing in subterranean formations |
| 07/07/1994 | WO1994015069A1 Method for fracturing high temperature subterranean formations |
| 07/07/1994 | WO1994015068A1 Method of extracting crude oil from oil wells |
| 07/07/1994 | WO1994015067A1 Process for increasing near-wellbore permeability of porous formations |
| 07/07/1994 | WO1994015066A1 Method of extracting gas from fluid-bearing strata |
| 07/07/1994 | WO1994015065A1 Turbo-pump for conveying highly viscous substances |
| 07/07/1994 | WO1994015064A1 Gravel packing system with diversion of fluid |
| 07/07/1994 | WO1994015061A1 Apparatus and method of perforating wellbores |
| 07/07/1994 | WO1994014707A1 Removing vocs from groundwater |
| 07/07/1994 | CA2152899A1 Method of producing gas from fluid containing beds |
| 07/07/1994 | CA2152393A1 Method for improving matrix acidizing in formations |
| 07/07/1994 | CA2152057A1 Removing vocs from groundwater |
| 07/06/1994 | EP0604526A1 Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 07/06/1994 | EP0604427A1 Electromagnetic method and apparatus for the decontamination of hazardous material-containing volumes |
| 07/05/1994 | US5326854 Flocculation process using lactam or vinyl sulfonate polymer |
| 07/05/1994 | US5326458 Liquid skimming system |
| 07/05/1994 | US5325923 Well completions with expandable casing portions |
| 07/05/1994 | US5325921 Method of propagating a hydraulic fracture using fluid loss control particulates |
| 07/05/1994 | US5325918 Optimal joule heating of the subsurface |
| 07/05/1994 | US5325795 Mobile material decontamination apparatus |
| 06/29/1994 | EP0604115A2 Treating subterranean formations with cellulose and guar derivatives |
| 06/29/1994 | CN2170371Y Constant temp. gas generator without shell |
| 06/29/1994 | CN1088665A High-efficient energy-saving lever oil pumping machine |
| 06/28/1994 | US5323855 Well stimulation process and apparatus |
| 06/28/1994 | US5323852 Torque limiter for auger gravel pack assembly |
| 06/28/1994 | US5323800 Washer for a portable self-contained ground water testing assembly |
| 06/28/1994 | US5323684 Downhole charge carrier |
| 06/28/1994 | CA2002468C Method of determining the depth of a hydraulic fracture zone in the earth |
| 06/28/1994 | CA1330432C Drill stem test method and apparatus |
| 06/28/1994 | CA1330388C High-temperature diverting agent system for the oil industry and corresponding treatment process |
| 06/25/1994 | CA2110445A1 Fatty acid salts as steam foaming agents |
| 06/23/1994 | WO1994013930A1 Method for cyclone separation of oil and water and means for separating of oil and water |
| 06/23/1994 | WO1994013929A1 Method and apparatus for cleaning wellbore perforations |
| 06/23/1994 | CA2152070A1 Method for cyclone separation of oil and water and means for separating of oil and water |
| 06/22/1994 | EP0602980A2 Method of perforating a well |
| 06/22/1994 | EP0523112B1 Branched ether surfactants and their use in an enhanced oil recovery process |
| 06/22/1994 | EP0380650B1 In-situ remediation system for contaminated groundwater |
| 06/22/1994 | CN2169686Y Injecting polymer device |
| 06/22/1994 | CN1088288A Permeable isolation sectioned screen |
| 06/22/1994 | CN1088184A Dispersion polymers for oil field water clarification |