| 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) |
|---|
| 07/20/1999 | US5924490 Well treatment tool and method of using the same |
| 07/20/1999 | US5924488 Methods of preventing well fracture proppant flow-back |
| 07/20/1999 | US5924487 In a subterranean wellbore |
| 07/20/1999 | CA2260087A1 Method and apparatus for creating leak-tested perforating gun assemblies |
| 07/20/1999 | CA2161504C Method and apparatus for slowing back spin of a rod string of a progressing cavity pump powered by an electric motor when power is lost |
| 07/16/1999 | CA2227354A1 Perforating gun brake |
| 07/15/1999 | WO1999035370A1 Method of gravitation separation of a hydrocarbon flow and a pressure flush device for flushing a gravitation separator for a hydrocarbon flow |
| 07/15/1999 | WO1999035369A1 Introduction of air into injection water |
| 07/15/1999 | WO1999035368A1 Method for drilling and completing a hydrocarbon production well |
| 07/15/1999 | DE19800959A1 Floating sucking-out system for fluids from circular cross sections, particularly for sucking oil from contaminated soil via boreholes |
| 07/14/1999 | EP0928642A2 Automatic aspirator air control system |
| 07/14/1999 | EP0928363A1 Method of installing tubing into a lateral borehole |
| 07/14/1999 | CN2328788Y Anti-dirt guard for well pumping unit |
| 07/14/1999 | CN1222950A Apparatus and method for perforating and stimulating subterranean formation |
| 07/14/1999 | CN1222948A Heated offshore pipeline and method of manufacturing |
| 07/14/1999 | CN1222555A Preparation of emulsifying fracture liquid for oil well |
| 07/13/1999 | US5922950 Depth-discrete sampling port |
| 07/13/1999 | US5922652 Microencapsulated oil field chemicals |
| 07/13/1999 | US5921713 Method for connecting underwater pipelines particularly suitable for great depths and big diameters |
| 07/13/1999 | US5921321 Hydrocarbon vent hood |
| 07/13/1999 | US5921320 Process and device for raising liquids from wells |
| 07/13/1999 | US5921318 Method and apparatus for treating multiple production zones |
| 07/13/1999 | US5921317 Coating well proppant with hardenable resin-fiber composites |
| 07/13/1999 | CA2133161C Electronic blast control system for downhole well operations |
| 07/08/1999 | WO1999034269A1 Fluidic level control systems |
| 07/08/1999 | WO1999034092A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 07/08/1999 | WO1999015755A3 Dual injection and lifting system |
| 07/07/1999 | EP0927811A1 System for sealing the intersection between a primary and a branch borehole |
| 07/07/1999 | CN1221850A Inspection system of oil extracting equipment working state |
| 07/07/1999 | CN1221849A Chemically induced stimulation of cleat formation in subterranean coal formation |
| 07/06/1999 | US5919036 Method and apparatus for burning combustible gases |
| 07/06/1999 | US5918677 Method of and apparatus for installing the casing in a well |
| 07/06/1999 | US5918674 Casing and method of installing the casing in a well |
| 07/06/1999 | US5918672 Shroud for a well screen |
| 07/06/1999 | US5918669 Method and apparatus for remote control of multilateral wells |
| 07/01/1999 | WO1999032813A1 Stuffing box |
| 07/01/1999 | WO1999032757A1 A method to increase the oil production from an oil reservoir |
| 07/01/1999 | WO1999032756A1 Apparatus and method for inflating packers in a well |
| 07/01/1999 | WO1999032730A1 Floating system and method for storing produced fluids recovered from oil and gas wells |
| 07/01/1999 | WO1999032352A1 Floating production installation |
| 06/30/1999 | EP0926310A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 06/30/1999 | EP0925423A1 Apparatus and method for perforating and stimulating a subterranean formation |
| 06/30/1999 | CN1221470A Pump-off controller |
| 06/30/1999 | CN1221445A Clay-free biodegradable wellbore fluid and method for using said fluid |
| 06/29/1999 | US5916933 Proppants comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol homopolymer or mixtures; coated foundry sands |
| 06/29/1999 | US5915932 Peristaltic pump having a roller support |
| 06/29/1999 | US5915478 Hydrostatic standing valve |
| 06/29/1999 | US5915477 In hydrocarbon reservoirs |
| 06/29/1999 | US5915475 Extending from the surface of the earth to a subterranean formation |
| 06/29/1999 | US5915474 Multiple drain drilling and production apparatus |
| 06/24/1999 | WO1999031353A1 Stabilizing clayey formations |
| 06/24/1999 | WO1999031352A2 Isolation system for two producing formations |
| 06/24/1999 | WO1999031347A1 Arrangement in a separator |
| 06/24/1999 | WO1999031295A1 Method for inhibiting microbially influenced corrosion |
| 06/24/1999 | WO1999031200A1 A method of improving the flow properties of a crude oil or natural gas liquid |
| 06/24/1999 | WO1999031198A2 Plant for removing carbon dioxide from gases and method for the exploitation of said plant |
| 06/24/1999 | WO1999015756A3 Multi-well computerized control of fluid pumping |
| 06/23/1999 | CN2325512Y Flexible drilling hose lifting/lowering apparatus of deep perforating machine |
| 06/23/1999 | CN2325511Y Perforating device with inclind spaced bit of deep perforating machine |
| 06/23/1999 | CN2325510Y Three phase flow and composite perforating and fracturing equipment |
| 06/23/1999 | CN1220717A Device for limiting bending radius of flexible duct |
| 06/23/1999 | CA2225758A1 Natural gas transportation apparatus and system |
| 06/22/1999 | US5914020 Forming a wall made of flowable electrode material and comprising a series of adjacent segments vertically extending into soil, then placing vertical conductor elements into wall at spaced intervals |
| 06/22/1999 | US5913365 From a well bore |
| 06/22/1999 | US5913363 Method for downhole separation of natural gas from brine with injection of spent brine into a disposal formation |
| 06/17/1999 | WO1999030002A1 Oilfield in situ hydrocarbon upgrading process |
| 06/17/1999 | WO1999029566A1 Floating installation |
| 06/16/1999 | EP0922835A2 System and method for recovering fluids from a wellbore |
| 06/16/1999 | EP0922155A1 Subsea module |
| 06/16/1999 | EP0804709B1 Use of at least two wells to the extraction of geothermal energy |
| 06/16/1999 | CN2324284Y Automatic hydraulic pressure booster |
| 06/16/1999 | CN2324283Y Controller for automatic stopping of pumping well |
| 06/15/1999 | US5911278 Calliope oil production system |
| 06/15/1999 | US5911277 System for activating a perforating device in a well |
| 06/15/1999 | CA2157072C Safety coupling for rotary down hole pump |
| 06/11/1999 | CA2255280A1 Wellbore fluid recovery system |
| 06/10/1999 | WO1999028588A1 Method and apparatus for enhancing production from a wellbore hole |
| 06/09/1999 | EP0920593A1 Pump |
| 06/09/1999 | EP0920571A1 Swivel |
| 06/09/1999 | EP0920570A1 Subsea well |
| 06/09/1999 | CN2323135Y Water injection device for oil field mechanical oil production well |
| 06/09/1999 | CN2323134Y Sleded single-well oil handling device |
| 06/08/1999 | US5910467 Solids-stabilized emulsion |
| 06/08/1999 | US5909773 Method of repairing a damaged well |
| 06/08/1999 | US5909772 Apparatus and method for estimating liquid yield of a gas/condensate reservoir |
| 06/08/1999 | US5909769 Fluid loss device |
| 06/03/1999 | WO1999027256A1 Pump/motor assembly |
| 06/03/1999 | WO1999027229A1 Formation treatment method using deformable particles |
| 06/03/1999 | CA2314350A1 Pump/motor assembly |
| 06/02/1999 | EP0919694A2 Method and apparatus for perforating a well |
| 06/02/1999 | EP0918918A1 Variable orifice gas lift valve for high flow rates with detachable power source and method of using |
| 06/02/1999 | EP0918917A1 Method for casing a wellbore |
| 06/02/1999 | CN2321940Y Internal combustion type heater |
| 06/02/1999 | CN2321939Y Quartz type orientation device for perforating hole position in petroleum production |
| 06/02/1999 | CN1218135A Automatic controlling instrument for mechanical oil well |
| 06/01/1999 | US5908365 Downhole triggering device |
| 06/01/1999 | US5908267 Treating non-naturally occurring subsurface soil contaminants with pneumatic injection of dry media |
| 06/01/1999 | US5908073 Method of propping a fracture in a subterranean zone |
| 06/01/1999 | CA2254704A1 Method and apparatus for pumping fluids from a well |
| 06/01/1999 | CA2006926C Recovery simulation pilot process for a hydrocarbon deposit |