| 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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| 02/03/1993 | EP0525257A1 Gravel pack well completions with auger-screen |
| 02/03/1993 | CN1068624A Improving premeability of fines-containing earthen formations by removing liquid water |
| 02/03/1993 | CN1068623A Insert type negative pressure extracting device of oil well |
| 02/02/1993 | US5183391 Valve pump |
| 02/02/1993 | US5183111 Extended reach penetrating tool and method of forming a radial hole in a well casing |
| 02/02/1993 | US5183110 Gravel well assembly |
| 02/02/1993 | US5183109 Method for optimizing hydraulic fracture treatment of subsurface formations |
| 02/02/1993 | CA1313351C Recovery of bitumen or heavy oil in situ by injection of hot water or low quality steam plus caustic and carbon dioxide |
| 01/27/1993 | CN1068390A Numerically-controlled output-distributing valve for oil well |
| 01/26/1993 | US5182051 Raioactive tracing with particles |
| 01/26/1993 | US5181796 Method for in situ contaminant extraction from soil |
| 01/26/1993 | US5181795 In-situ landfill pyrolysis, remediation and vitrification |
| 01/26/1993 | US5181578 Wellbore mineral jetting tool |
| 01/26/1993 | US5181571 Well casing flotation device and method |
| 01/26/1993 | US5181570 Liner hanger assembly |
| 01/26/1993 | CA1313129C Logging of subterranean wells using coiled tubing |
| 01/26/1993 | CA1313128C Method of treating a permeable formation |
| 01/21/1993 | WO1993001010A1 Electro-vac decontamination process |
| 01/21/1993 | CA2112990A1 Electro-vac decontamination process |
| 01/20/1993 | EP0523954A2 Surge relief valve |
| 01/20/1993 | EP0523112A1 Branched ether surfactants and their use in an enhanced oil recovery process. |
| 01/19/1993 | US5180503 In-situ vapor stripping for removing volatile organic compounds from groundwater |
| 01/19/1993 | US5180016 Apparatus and method for placing and for backwashing well filtration devices in uncased well bores |
| 01/19/1993 | US5180013 Method for in situ removal of a spilled fluid from soil |
| 01/19/1993 | US5180010 Multiple acting lock for gravel pack system |
| 01/19/1993 | CA1312792C Offshore drilling/production platform with a retractable work deck |
| 01/14/1993 | DE4121394A1 Injection method of underground mineral extraction - using drill string with injection head used as drill bit, and flushing up loosened material from deposit to top of drill string |
| 01/13/1993 | EP0522628A2 Fracturing method and apparatus |
| 01/13/1993 | CN1067945A Discharge assistant used in acidizing and press cracking technology |
| 01/13/1993 | CN1067866A Making method jof soda powder |
| 01/12/1993 | US5179306 Small diameter brushless direct current linear motor and method of using same |
| 01/12/1993 | US5178491 Vapor-phase nutrient delivery system for in situ bioremediation of soil |
| 01/12/1993 | US5178218 Petroleum wells with resins for consolidation |
| 01/12/1993 | US5178217 Gas foam for improved recovery from gas condensate reservoirs |
| 01/12/1993 | CA2046792A1 Permeability of fines-containing earthen formations by removing liquid water |
| 01/11/1993 | CA2073415A1 Oil well production system |
| 01/06/1993 | CN1067713A Pump control system for downhole motor-pump assembly and method of using same |
| 01/05/1993 | US5176471 Arrangement and method for protecting components in subsea systems |
| 01/05/1993 | US5176216 Bypass seating nipple |
| 01/05/1993 | US5176164 Flow control valve system |
| 12/30/1992 | CN1067483A Oil pumping unit with double acting wheel and pull rod |
| 12/30/1992 | CN1067476A Numerally controlled valve group for metering station of oil well |
| 12/30/1992 | CN1067390A Numerically controlled oil-gas-water separator |
| 12/30/1992 | CN1019674B Gas pressure balance and safety device in pumping unit |
| 12/29/1992 | US5175133 Ceramic microspheres |
| 12/29/1992 | US5174379 Gravel packing and perforating a well in a single trip |
| 12/29/1992 | US5174377 Method for optimizing steamflood performance |
| 12/29/1992 | US5174375 For conducting a fluid and running a linear into an underground borehole |
| 12/29/1992 | CA1312005C Method of preventing fines migration |
| 12/24/1992 | DE4120189A1 Gravel and binder mixt. for deep wells in brown coal mining, etc. |
| 12/23/1992 | WO1992022621A1 Drilling mud compositions |
| 12/23/1992 | EP0519897A2 Vapor-phase nutrient delivery system for in situ bioremediation of soil |
| 12/23/1992 | EP0518924A1 Dentifrice inhibiting dental plaque. |
| 12/23/1992 | EP0414708B1 Recovery of oil from oil reservoirs |
| 12/23/1992 | CN2125697U Electric sound wave bomb |
| 12/23/1992 | CA2111211A1 Drilling mud compositions |
| 12/22/1992 | US5173092 Treatment of polluted ground water by separation, air stripping |
| 12/22/1992 | US5173022 Process for pumping a gas/liquid mixture in an oil extraction well and device for implementing the process |
| 12/22/1992 | US5172764 Process and apparatus for groundwater extraction using a high vacuum process |
| 12/22/1992 | US5172763 Steam-foam drive |
| 12/22/1992 | US5172717 Well control system |
| 12/22/1992 | US5172591 Oil well sucker rod load measurement |
| 12/22/1992 | CA2045260A1 Method for prolonging the useful life of scale inhibitors injected within a formation |
| 12/22/1992 | CA1311605C Method for reducing the viscosity of aqueous fluids |
| 12/16/1992 | EP0517747A1 Method and system for underground gasification of coal or browncoal. |
| 12/16/1992 | CN2124997U Electric pulse acoustic wave bullet |
| 12/15/1992 | US5171104 Arrangement for treating gas from contaminated ground region |
| 12/15/1992 | US5170847 Hydraulic release oil tool |
| 12/15/1992 | US5170815 Coiled tubing gas lift assembly |
| 12/10/1992 | WO1992021880A1 Pump control system for a downhole motor-pump assembly and method of using same |
| 12/09/1992 | EP0517597A1 Process for the production of hydrocarbons, undeground cavity for carrying out the process and related use of this cavity |
| 12/09/1992 | EP0517362A2 Perforating gun release apparatus |
| 12/09/1992 | EP0516715A1 Improvements relating to hydrocyclone systems. |
| 12/09/1992 | CN2124306U Well oil and water separated oil production apparatus |
| 12/09/1992 | CN1019407B Method of determing depth of hydraulic fracture zone in earth |
| 12/08/1992 | US5170378 Hydraulic impedance test method |
| 12/08/1992 | US5168765 Water sampler |
| 12/08/1992 | CA1311189C Method and apparatus for actuating a tubing conveyed perforating gun |
| 12/04/1992 | CA2043802A1 Oil well fire suppression system |
| 12/02/1992 | EP0515513A1 Releasable hydraulic and/or electric connection for subsea equipment. |
| 12/01/1992 | US5167282 Apparatus and method for detonating well perforators |
| 12/01/1992 | US5167280 Single horizontal well process for solvent/solute stimulation |
| 11/30/1992 | CA2068200A1 Reeled tubing gas lift mandrel |
| 11/26/1992 | WO1992020900A1 Overbalance perforating and stimulation method for wells |
| 11/26/1992 | WO1992020423A1 Removing volatile organic compounds from groundwater |
| 11/26/1992 | CA2108128A1 Removing volatile organic compounds from groundwater |
| 11/25/1992 | CN2122932U Wire skeleton |
| 11/25/1992 | CA2062044A1 Fluid injection and production apparatus and method |
| 11/24/1992 | US5165489 Safety device to prevent premature firing of explosive well tools |
| 11/24/1992 | US5165479 Method for stimulating subterranean formations |
| 11/24/1992 | US5165476 Gravel packing of wells with flow-restricted screen |
| 11/24/1992 | US5165475 Method for the control of solids accomanying hydrocarbon production from subterranean formations |
| 11/24/1992 | US5165276 Downhole measurements using very short fractures |
| 11/24/1992 | US5165235 System for using geopressured-geothermal reservoirs |
| 11/24/1992 | CA2043092A1 Electrical heating of oil reservoir |
| 11/24/1992 | CA1310581C Method of improving the areal sweep efficiency of a steam flood oil recovery process |
| 11/23/1992 | CA2068230A1 Differential firing head |
| 11/21/1992 | CA2061137A1 Subsurface well pressure actuated and fired apparatus |
| 11/19/1992 | EP0513844A1 Operating assembly for a multi-mode testing tool |
| 11/19/1992 | EP0310625B1 Improvements relating to detonating heads |