Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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)
11/1999
11/25/1999WO1999060246A1 A method of connecting a delivery line to a submerged manifold, and a vertical connection module
11/25/1999WO1999060244A1 Multiple lateral hydraulic drilling apparatus and method
11/25/1999DE19921836A1 Automotive hydrostatic rotary gear has concentric rotary pump
11/25/1999DE19919240A1 Positive displacement rotary piston bore hole motor and pumping unit
11/24/1999EP0958446A2 Method and device for driving bore-holes, specially for prospection and extraction drillings
11/24/1999CN2350524Y Oil well oil-increasing and water-decreasing device
11/24/1999CN2350523Y Portable flushing operation metering device for water injection well
11/23/1999US5990315 Reacting 2-(5-amino-2,4-dichlorophenyl)-4-(difluoromethyl)-2,4-dihydro-5-methyl-3h-in the presence of a catalytic amount of a source of soluble halide.
11/23/1999US5990052 Gaseous phase, proppant and aqueous phase comprising a hydrophobically modified guar where the hydrophobic groups consist of a c1-4 alkyl and various hydroxy ethers of given formula; and a surfactant; leaves no residues
11/23/1999US5990051 Mixing oxyzolidine, collagen, oil and water and molding the mixture into round balls
11/23/1999US5988992 Retrievable progressing cavity pump rotor
11/23/1999US5988760 Process for hollowing out a cavity formed of a plurality of sub-cavities in a thin layer of salt
11/23/1999US5988286 Cable anchor assembly
11/23/1999US5988285 Zone isolation system
11/23/1999US5988284 Method and apparatus for enhancing well performance
11/23/1999US5988283 Vertical combined production facility
11/23/1999US5988281 Engageable metal seal pressure balanced stab
11/23/1999US5988280 Use of engine heat in treating a well bore
11/23/1999US5988278 Using a horizontal circular wellbore to improve oil recovery
11/23/1999US5988275 Method and system for separating and injecting gas and water in a wellbore
11/23/1999US5988271 Proppant slurry screen apparatus and methods of using same
11/23/1999CA2226688C Apparatus and method for dual-zone well production
11/21/1999CA2272592A1 A catalytic method for the preparation of lignin phenol surfactants in organic solvents
11/20/1999CA2250669A1 Chemical stick storage and delivery system
11/18/1999WO1999059002A2 System and process for optimizing gravity gradiometer measurements
11/18/1999WO1999058816A1 System and process for secondary hydrocarbon recovery
11/18/1999WO1999058815A1 Downhole pump installation/removal system and method
11/18/1999WO1999058479A1 Learning-based controller for biotechnology processing, and method of using
11/18/1999CA2325954A1 Downhole pump installation/removal system and method
11/17/1999EP0957235A2 Stimulating and producing a multiple stratified reservoir
11/17/1999EP0956428A1 Method for stabilizing the gas flow in water-bearing natural gas deposits or reservoirs
11/17/1999EP0956424A2 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom
11/17/1999EP0956322A1 Corrosion inhibitor for wellbore applications
11/17/1999EP0941200A4 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
11/17/1999CN2349347Y Hollow and with sewage mixed apparatus for obtaining thick oil
11/17/1999CN1046571C Method and apparatus for raising liquid from wells
11/16/1999US5984578 Apparatus and method for in situ removal of contaminants using sonic energy
11/16/1999US5984568 Connector assembly for an expandable slotted pipe
11/16/1999US5984013 Plunger arrival target time adjustment method using both A and B valve open times
11/16/1999US5984010 Hydrocarbon recovery systems and methods
11/16/1999US5983931 Rotating connector with integrated LNG course
11/16/1999CA2167277C Formation injection tool for down-bore in-situ disposal
11/11/1999WO1999057417A2 Chemical actuation system for downhole tools and method for detecting failure of an inflatable element
11/11/1999WO1999057410A2 Method of and device for production of hydrocarbons
11/10/1999EP0955447A2 Sand control screen with cathodic protection
11/10/1999EP0954677A1 Method of increasing the amount of hydrocarbons from an underground reservoir
11/10/1999EP0954675A1 Well head system
11/10/1999CN2348143Y Full-balancing chain wheel oil-pumping unit
11/10/1999CN2348097Y Preseparating hydroclone for combination oil-field production liquid
11/10/1999CN2348096Y Liquid carbon dioxide injection device
11/10/1999CN2348095Y Composite holder of composite perforator for us in oil-gas well
11/10/1999CN1234472A Steam chemical incoming-outcoming method for extracting superthick oil
11/09/1999US5983164 Method and apparatus for measuring and controlling the flow of natural gas from gas wells
11/09/1999US5980745 Wire mesh filter
11/09/1999US5980737 Positive pressure oil well production package
11/09/1999US5979561 Downhole activation circuit valving
11/09/1999US5979560 Lateral branch junction for well casing
11/09/1999US5979559 Apparatus and method for producing a gravity separated well
11/09/1999US5979558 Variable choke for use in a subterranean well
11/09/1999US5979553 Method and apparatus for completing and backside pressure testing of wells
11/09/1999US5979552 Dual annulus production tool
11/09/1999US5979551 Well screen with floating mounting
11/09/1999US5979549 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well
11/09/1999CA2171855C Apparatus and method for perforating and fracturing
11/09/1999CA2013605C A method and apparatus of obtaining natural gas from a maritime deposit
11/04/1999WO1999056000A1 Deformable liner tube
11/04/1999WO1999055999A1 Foldable tube
11/04/1999WO1999039073A3 Method and apparatus for running two tubing strings into a well
11/03/1999CN2346930Y Adjustable eccentric injection well down-hole flow
11/03/1999CN2346925Y Fully enclosed anti-theft light weight eccentric christmas tree wellhead assembly
11/03/1999CN1046152C Automatically continuous negative pressure gas producing technology
11/02/1999USRE36362 Polymer liners in rod pumping wells
11/02/1999US5975803 System and method for connecting together two assemblies which can move one with respect to the other, especially in underwater installations
11/02/1999US5975209 Automatic blanking completion tool
11/02/1999US5975205 Gravel pack apparatus and method
11/02/1999US5975204 Method and apparatus for the remote control and monitoring of production wells
10/1999
10/28/1999WO1999054592A1 Well treatment for water restriction
10/28/1999WO1999054020A1 Sand resistant fluid swivel
10/27/1999EP0952306A1 Foldable tube
10/27/1999EP0952305A1 Deformable tube
10/27/1999EP0952301A1 Method and apparatus for drilling an offshore underwater well
10/27/1999EP0952300A1 Method and apparatus for drilling a plurality of offshore underwater wells
10/27/1999EP0951612A1 Method for drying out rock containing immobile formation water within the encroachment area of natural gas deposits and gas reservoirs
10/27/1999CN2345678Y Dragable type water-stop oil extraction process pipe column
10/27/1999CN2345676Y Dynamic adjusting machine for balance beam pumping unit
10/26/1999US5972061 Wellhead separation system
10/26/1999US5971667 Apparatus for movement along an underground passage and method using same
10/26/1999US5971077 Insert tree
10/26/1999US5971074 Methods of completing a subterranean well and associated apparatus
10/26/1999US5971073 Methods of completing a subterranean well and associated apparatus
10/26/1999US5971072 Inductive coupler activated completion system
10/26/1999US5971070 Apparatus for completing a subterranean well and associated methods
10/26/1999US5971069 Well completion and production techniques
10/26/1999US5971004 Variable orifice gas lift valve assembly for high flow rates with detachable power source and method of using same
10/21/1999WO1999053172A1 Orienting downhole tools
10/21/1999WO1999053171A1 Compact double screen assembly
10/21/1999WO1999053170A1 Coated downhole tools
10/21/1999WO1999039846A9 Downhole pressure generator and method for use
10/21/1999CA2254244A1 Apparatus for enhanced recovery of viscous oil deposits
10/20/1999EP0950794A2 Apparatus and method for completing a subterranean well
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