| 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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| 06/06/1989 | US4836109 Control line differential firing head |
| 06/06/1989 | CA1255288A1 Development well drilling |
| 06/06/1989 | CA1255109A1 Offshore drilling and/or production system |
| 06/06/1989 | CA1255108A1 Method for preventing thaw settlement along offshore arctic pipelines |
| 05/31/1989 | CN2038546U Pawl spring type sliding bush oil drainage |
| 05/31/1989 | CN2038545U Hydraulic beam pumping unit |
| 05/30/1989 | US4834194 Method and apparatus for detection of volatile soil contaminants in situ |
| 05/30/1989 | US4834185 Method and apparatus for manipulating a well bore liner |
| 05/30/1989 | US4834181 Creation of multi-azimuth permeable hydraulic fractures |
| 05/30/1989 | US4834179 Recovering residual hydrocarbons |
| 05/30/1989 | US4834178 Process for injection of oxidant and liquid into a well |
| 05/30/1989 | CA1254934A1 Method and apparatus for enhancing liquid hydrocarbon production by formation heating |
| 05/30/1989 | CA1254731A1 Phosphate ester/alcohol micellar solutions in well acidizing |
| 05/24/1989 | EP0178962B1 Method and apparatus for the compression and transportation of a gas comprising a liquid fraction |
| 05/24/1989 | CN2038149U Single screw pump oil pumping system of multi-segment |
| 05/24/1989 | CN1004294B Long stroke pumping unit |
| 05/23/1989 | US4832134 Shaped charge assembly with retaining clip |
| 05/23/1989 | US4832129 Multi-position tool and method for running and setting a packer |
| 05/23/1989 | US4832127 Method and apparatus for producing viscous crudes |
| 05/23/1989 | US4832124 Subsea well head template |
| 05/23/1989 | US4832123 Removing fracture fluid via chemical blowing agents |
| 05/23/1989 | US4832122 In-situ remediation system and method for contaminated groundwater |
| 05/23/1989 | US4832121 Methods for monitoring temperature-vs-depth characteristics in a borehole during and after hydraulic fracture treatments |
| 05/23/1989 | CA1254505A1 Exploitation method for reservoirs containing hydrogen sulphide |
| 05/23/1989 | CA1254502A1 Gravel packer |
| 05/23/1989 | CA1254500A1 Downhole recorder for use in wells |
| 05/17/1989 | EP0315987A2 Improved organophilic clay suspension medium |
| 05/17/1989 | CN2037774U Integral piston of plungeroil pump |
| 05/16/1989 | US4830794 Dry sand foam generator |
| 05/16/1989 | US4830542 Subsea template leveling wafer and leveling method |
| 05/16/1989 | US4830120 Methods and apparatus for perforating a deviated casing in a subterranean well |
| 05/16/1989 | US4830113 Well pumping method and apparatus |
| 05/16/1989 | US4830111 Water well treating method |
| 05/16/1989 | US4830110 Method for completing wells in unconsolidated formations |
| 05/16/1989 | US4830106 Simultaneous hydraulic fracturing |
| 05/16/1989 | CA1254026A1 Polymers useful in the recovery and processing of natural resources |
| 05/10/1989 | CN2037389U Energy-saving oil-drawing machine |
| 05/10/1989 | CN1032849A Flexible flowline connection to subsea wellhead assembly |
| 05/09/1989 | US4828291 Fluted safety joint apparatus for use in cased oil and gas wells |
| 05/09/1989 | US4828051 Method and apparatus for data transmission in a well using a flexible line with stiffener |
| 05/09/1989 | US4828037 Liner hanger with retrievable ball valve seat |
| 05/09/1989 | US4828036 Apparatus and method for pumping well fluids |
| 05/09/1989 | US4828034 Method of hydrating oil based fracturing concentrate and continuous fracturing process using same |
| 05/09/1989 | US4828032 Oil recovery process using alkyl hydroxyaromatic dianionic surfactants as mobility control agents |
| 05/09/1989 | US4828031 In situ chemical stimulation of diatomite formations |
| 05/09/1989 | US4828030 Viscous oil recovery by removing fines |
| 05/09/1989 | US4828029 Enhanced oil recovery, cosolvents, carobn dioxide, nitrogen, light hydrocarbons |
| 05/09/1989 | US4828028 Method for performing fracturing operations |
| 05/09/1989 | CA1253794A1 Vertical conformance steam drive oil recovery method |
| 05/09/1989 | CA1253679A1 Hydraulic fracturing process and compositions |
| 05/05/1989 | WO1989003926A1 Gravel pack for petroleum or water wells |
| 05/03/1989 | EP0314249A2 Pump off/gas lock motor controller for electrical submersible pumps |
| 05/03/1989 | DE3835771A1 Verfahren zur behandlung eines fermentationsmediums mit einem gehalt an einem polysaccharid zur erhoehung von dessen filtrierbarkeit und verwendung dieses mediums zur durch hilfsmittel unterstuetzten erdoelfoerderung Process for the treatment of a fermentation medium with a content of a polysaccharide filterability and to increase its use of this medium to aid supported by erdoelfoerderung |
| 05/03/1989 | CN1032674A Treating process for raising filterability of fermentation liquor contg. polysaccharose used as assistant recovery petroleum |
| 05/02/1989 | US4826087 Manipulative device |
| 05/02/1989 | US4825954 Liner hanger with improved bite and method |
| 05/02/1989 | US4825952 Enhanced oil recovery |
| 05/02/1989 | US4825944 Gravel pack completion for in situ leach wells |
| 05/02/1989 | US4825895 Water injection choke valve |
| 05/02/1989 | CA1253436A1 Telescoping joint |
| 05/02/1989 | CA1253434A1 Carbon dioxide stimulated oil recovery process |
| 04/26/1989 | EP0313374A1 Well-logging method using a drill pipe conveyed logging system |
| 04/26/1989 | EP0238535B1 Slug-catcher that can be pigged |
| 04/26/1989 | EP0185067B1 Fluid separation cells and spacers for use in these |
| 04/26/1989 | EP0168479B1 Particulate ceramic useful as a proppant |
| 04/26/1989 | CN2036571U Wellhead fracturing device for oil-water well |
| 04/26/1989 | CN2036570U Rotator of pumping rod |
| 04/26/1989 | CN1032567A Deep-well water and oil vacuum pump |
| 04/25/1989 | US4825073 Method for determining depth of penetration of radioactive tracers in formation fractures |
| 04/25/1989 | US4824562 In well separator for heavier liquid |
| 04/25/1989 | US4823880 Gaswell dehydrate valve |
| 04/25/1989 | US4823876 Formation stimulating tool with anti-acceleration provisions |
| 04/25/1989 | US4823875 Well treating method and system for stimulating recovery of fluids |
| 04/25/1989 | US4823873 Steam mediated fluorochemically enhanced oil recovery |
| 04/25/1989 | US4823826 Process and apparatus for introducing aqueous chloride dioxide into high pressure water injection wells |
| 04/19/1989 | CN2036206U Hydraulic mining center tube for easily soluble minerals |
| 04/19/1989 | CN2036205U Oil extraction and recharge doublepurpose shaft |
| 04/18/1989 | US4822212 Subsea template and method for using the same |
| 04/18/1989 | US4821817 Actuator for an appliance associated with a ducted body, especially a drill rod |
| 04/18/1989 | US4821804 Composite support column assembly for offshore drilling and production platforms |
| 04/18/1989 | US4821801 Producing asphaltic crude oil |
| 04/18/1989 | US4821800 Composite particles having iron-containing core surrounded by chromium cladding |
| 04/18/1989 | US4821564 Method and system for determining fluid pressures in wellbores and tubular conduits |
| 04/18/1989 | CA1252740A1 Process and device for inducing a set of hydrodynamic functions in a flow made up of two phases at least |
| 04/13/1989 | DE3730671A1 Vorrichtung zur unterseeischen foerderung von erdoel und erdgas Apparatus for subsea production of oil and natural gas |
| 04/12/1989 | EP0310625A1 Improvements relating to detonating heads. |
| 04/12/1989 | CN2035793U Perforator |
| 04/11/1989 | US4820429 Synergistic mixture of alpha-olefin sulfonate and alkylated diphenyl oxide sulfonate |
| 04/11/1989 | US4820422 Connecting into system casing filled with movable spheres |
| 04/11/1989 | US4820135 Fluid driven pumping apparatus |
| 04/11/1989 | US4820083 Flexible flowline connection to a subsea wellhead assembly |
| 04/11/1989 | US4819955 Mobile storage tank battery |
| 04/11/1989 | US4819730 Development drilling system |
| 04/11/1989 | US4819725 Recovering oil bypassed by a steam override zone |
| 04/11/1989 | US4819724 At least two wells, one for continuous injection, second for cyclic injection and production |
| 04/11/1989 | US4819723 Injection of alkali metal silicate in hydrocarbon; breaking emulsion adjacent well bore with microwave energy |
| 04/11/1989 | US4819722 Metal well screen assembly with plastic end fitting and method of attaching same |
| 04/11/1989 | CA1252387A1 Method and apparatus for connecting a tubular element to an underwater wellhead |
| 04/11/1989 | CA1252386A1 Device for placing, activating and connecting the modules of a submerged oil producing unit |
| 04/11/1989 | CA1252383A1 Oil recovery method |