| 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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| 12/19/1989 | US4887673 Technique for completing shallow wells with tension packer |
| 12/19/1989 | US4887671 Penetrating underground formation by injecting, pressurizing; hydrocarbon recovery |
| 12/19/1989 | US4887670 Controlling fracture growth |
| 12/19/1989 | US4887628 Fluidic apparatus |
| 12/14/1989 | WO1989012158A1 Miscible gas enhanced oil recovery method using ethoxylated alkylphenol sulfonate |
| 12/13/1989 | EP0345947A1 An offshore drilling/production platform with a retractable work deck |
| 12/13/1989 | EP0345830A2 Kickover tool apparatus |
| 12/13/1989 | EP0345690A1 Apertured pipe segment |
| 12/13/1989 | EP0345256A1 Process for making a well. |
| 12/13/1989 | CN2049283U Displacement-varying thick oil pump |
| 12/12/1989 | US4886395 Pipeline to riser connection method and apparatus |
| 12/12/1989 | US4886127 Apparatus for firing borehole perforating apparatus |
| 12/12/1989 | US4886126 Method and apparatus for firing a perforating gun |
| 12/12/1989 | US4886119 Method of and arrangement for driving volatile impurities from ground |
| 12/12/1989 | US4886118 Pyrolysis; enhanced oil recovery |
| 12/12/1989 | US4886116 Natural gas production apparatus with bottom-hole separator |
| 12/12/1989 | US4886113 Positive indication shear ring |
| 12/12/1989 | US4885993 Shaped charge with bifurcated projection for detonating cord |
| 12/12/1989 | CA1263840A2 Packer and service tool assembly |
| 12/12/1989 | CA1263839A2 Packer and service tool assembly |
| 12/06/1989 | CN2048895U Full hydraulic pump type oil sucker |
| 12/05/1989 | US4884635 Injection into well |
| 12/05/1989 | US4884634 Process for increasing the degree of oil extraction |
| 11/30/1989 | WO1989011581A1 Method and device for exciting a well during oil extraction |
| 11/28/1989 | US4883589 System for removing contaminants from ground water |
| 11/28/1989 | US4883387 Apparatus for tensioning a riser |
| 11/28/1989 | US4883124 Method of enhancing hydrocarbon production in a horizontal wellbore in a carbonate formation |
| 11/28/1989 | US4883123 Above packer perforate, test and sample tool and method of use |
| 11/28/1989 | US4883122 Method of coalbed methane production |
| 11/22/1989 | CN1037376A Method and apparatus for utilizing oil well energy |
| 11/21/1989 | US4882071 Method and apparatus for the in situ decontamination of underground water with the aid of solar energy |
| 11/21/1989 | US4881850 Subsea guidebase |
| 11/21/1989 | US4881599 Mechanical system for diversion in the acidizing treatment of oil formations |
| 11/21/1989 | US4881445 Shaped charge |
| 11/15/1989 | CN2047716U Piezoelertrical type acoustic wave transducer for oil well |
| 11/15/1989 | CN2047715U Movable-beam oil pump with planetary donkey's head long stroke |
| 11/15/1989 | CN2047714U Automatic multifunction fault controlling device for oil pumps |
| 11/14/1989 | US4880062 Oil well downhole liquid injection assembly |
| 11/14/1989 | US4880059 Sliding sleeve casing tool |
| 11/14/1989 | US4880057 Injecting reverse osmosis desalinization product water and carbon dioxide |
| 11/14/1989 | US4880056 Hydraulically activated firing head for well perforating guns |
| 11/14/1989 | US4880040 Liquid petroleum confinement system |
| 11/09/1989 | DE3913986A1 Filterelement Filter element |
| 11/09/1989 | DE3907637A1 Rodless drilling, pressure or cleaning implement |
| 11/08/1989 | CN1005741B Drum-type long stroke oil sucking machine |
| 11/07/1989 | US4879181 Sintered spherical pellets containing clay as a major component useful for gas and oil well proppants |
| 11/07/1989 | US4878694 Method and device for the remote positioning of an elbow coupling |
| 11/07/1989 | US4878540 Apparatus and process for pumping fluid from subterranean formations |
| 11/07/1989 | US4878539 Method and system for maintaining and producing horizontal well bores |
| 11/07/1989 | US4878538 Perforate, test and sample tool and method of use |
| 11/07/1989 | CA1262783A1 Oxidation of sulfides in polymer-thickened aqueous solution |
| 11/02/1989 | WO1989010463A1 Recovery of oil from oil reservoirs |
| 11/02/1989 | EP0339774A2 Firing head for well perforating gun |
| 11/02/1989 | DE3813014A1 Process for the fluid extraction of fossil hydrocarbons from crude oil deposits, oil sands and tar sands, with subsidiary claims for the utilisation of geothermal and solar energy in conjunction with and by conversion via hot-air engines |
| 11/01/1989 | CN2046926U Crude oil heating apparatus |
| 11/01/1989 | CN2046925U Six-rod type double-beam pumping unit |
| 11/01/1989 | CN2046924U Wholy hydraulic pumping unit without support |
| 10/31/1989 | USRE33102 Removal of volatile contaminants from the vadose zone of contaminated ground |
| 10/31/1989 | US4877956 Closed feedback injection system for radioactive materials using a high pressure radioactive slurry injector |
| 10/31/1989 | US4877356 Method and apparatus for installing a flowline near the waterbottom |
| 10/31/1989 | CA1262531A1 Oil processing apparatus |
| 10/31/1989 | CA1262508A1 Composition and method for temporarily reducing the permeability of subterranean formations |
| 10/31/1989 | CA1262507A1 Polymer article and its use for controlled introduction of reagent into a fluid |
| 10/25/1989 | EP0338832A1 Method and apparatus for retrieving a running tool/guideframe assembly |
| 10/25/1989 | CN2046542U Compound wheel type beam-pumping unit |
| 10/24/1989 | US4876030 Mixture with hydrocarbon oil and phenyl hydroxyalkyl ether or phenylalkanol |
| 10/24/1989 | US4875525 Consolidated proppant pack for producing formations |
| 10/24/1989 | US4875413 Apparatus for perforating wells |
| 10/24/1989 | CA1262483A1 Method and device for pumping a highly viscous liquid |
| 10/19/1989 | WO1989009664A2 In situ heating to detoxify organic-contaminated soils |
| 10/18/1989 | EP0337624A2 Control of oilfield biofouling |
| 10/18/1989 | CN2046151U Beam-pumping unit |
| 10/18/1989 | CN1036431A Drill stem test method and apparatus |
| 10/17/1989 | US4874529 Flocculating overflow |
| 10/17/1989 | US4874043 Method of producing viscous oil from subterranean formations |
| 10/17/1989 | US4874008 Valve mounting and block manifold |
| 10/11/1989 | EP0336492A1 A method of drilling and/or production of oil and/or gas |
| 10/11/1989 | EP0335928A1 Floating production system and vessel for undersea oil well |
| 10/11/1989 | CN2045779U Pressure-emptying recoverer for crude oil |
| 10/11/1989 | CN2045778U Anti-air oil-well pump |
| 10/11/1989 | CN2045777U Multi-functional wellhead device for oil-well pump |
| 10/10/1989 | US4872509 Oil well production system using a hollow tube liner |
| 10/10/1989 | CA1262233A1 Combination landing unit and seal assembly |
| 10/05/1989 | WO1989009323A1 Process and installation for recuperation of energy from oil wells |
| 10/04/1989 | CN2045424U Safety detonator for oil well perforation |
| 10/03/1989 | US4871023 Adding phosphorus, arsenic, antimony,and bismuth containing compounds,and hydrogen ion producing cations |
| 10/03/1989 | US4871018 Plugging apparatus for a gravel packer |
| 10/03/1989 | CA1262039A1 Production of polyacrylamide solution used in an oil recovery process |
| 09/27/1989 | CN2045024U Tubing thick oil pump with improved movable oil inlet valve |
| 09/26/1989 | US4870137 Novel n-substituted polyamide type polymers, their method of preparation and their use as additives for crude petroleum oils |
| 09/26/1989 | US4869960 Epoxy novolac coated ceramic particulate |
| 09/26/1989 | US4869555 Apparatus for recovery of sulfur |
| 09/26/1989 | US4869323 Cementing and rotating an upper well casing attached by swivel to a lower casing |
| 09/26/1989 | US4869322 Sequential hydraulic fracturing of a subsurface formation |
| 09/26/1989 | CA1261817A1 Earth drilling method and apparatus using multiple hydraulic forces |
| 09/26/1989 | CA1261735A1 Method and apparatus for recovering fractions from hydrocarbon materials, facilitating the removal and cleansing of hydrocarbon fluids, insulating storage vessels, and cleaningstorage vessels and pipelines |
| 09/26/1989 | CA1261283A1 Fluid separation cells and spacers for use in these |
| 09/26/1989 | CA1261250A1 Patterns of horizontal and vertical wells for improving oil recovery efficiency |
| 09/26/1989 | CA1260826A1 Parallel horizontal wells |
| 09/26/1989 | CA1260825A1 Optimum production rate for horizontal wells |