| 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) |
|---|
| 05/27/1999 | WO1999025952A1 Repressurization of oilfield reservoir for enhanced hydrocarbon recovery |
| 05/27/1999 | WO1999025951A1 Device for fixing a filtering cover inside a well |
| 05/27/1999 | WO1999025950A1 Plunger lift controller |
| 05/27/1999 | WO1999025524A1 Method and apparatus for manufacturing an expandable slotted tube |
| 05/27/1999 | WO1999025480A1 Device and method for separating a heterogeneous mixture |
| 05/27/1999 | WO1999025479A1 Device and method for separating a heterogeneous mixture |
| 05/27/1999 | WO1999015755A8 Dual injection and lifting system |
| 05/27/1999 | CA2278466A1 Plunger lift controller |
| 05/26/1999 | EP0917905A1 Device and process for the diphase compression of a soluble gas within a solvent |
| 05/26/1999 | EP0917616A1 Particle control screen assembly |
| 05/26/1999 | CN1043484C Sand-proof sand-extructing and oil-pumping combined apparatus |
| 05/25/1999 | US5907662 Electrode wells for powerline-frequency electrical heating of soils |
| 05/25/1999 | US5906242 Method of suspending and ESP within a wellbore |
| 05/25/1999 | US5906241 Method for bubbling extraction of groundwater |
| 05/25/1999 | US5906238 Downhole flow control devices |
| 05/25/1999 | CA2222459A1 The hydrostatic oil well pump jack |
| 05/25/1999 | CA2134273C Spoolable coiled tubing completion system |
| 05/20/1999 | WO1999024717A1 Drive head for a rotary-driven rod assembly, especially for driving a sand pump |
| 05/20/1999 | WO1999024689A1 Assembly and process for drilling and completing multiple wells |
| 05/20/1999 | CA2308164A1 Drive head for a rotary-driven rod assembly, especially for driving a sand pump |
| 05/19/1999 | EP0916805A2 Apparatus and method for stimulating a subterranean well |
| 05/19/1999 | EP0916015A2 Method and apparatus for the downhole metering and control of fluids produced from wells |
| 05/19/1999 | EP0800612A4 Method for determining closure of a hydraulically induced in-situ fracture |
| 05/19/1999 | CN2319566Y Coordinates sand filteirng pipe of oil well |
| 05/19/1999 | CN2319565Y Improved dividingly pouring well |
| 05/19/1999 | CN1217041A Underwater installation and method for building same |
| 05/19/1999 | CN1216798A Method for treating oil prodn. well by periodic negative pressure combined with acidification |
| 05/18/1999 | US5904209 Method and device for removal of production inhibiting liquid from a gas well |
| 05/18/1999 | CA2113597C Stable emulsion of viscous crude hydrocarbon in aqueous buffer solution and method for forming and transporting same |
| 05/14/1999 | WO1999023354A1 Expandable downhole tubing |
| 05/14/1999 | WO1999023353A1 Improvement in a side element of a drilling template |
| 05/14/1999 | WO1999023350A1 Method and device for mounting of a seabed installation |
| 05/14/1999 | WO1999023349A1 Device for connecting a manifold module and a structure on a seabed |
| 05/14/1999 | WO1999010623A8 Stimulation of lenticular natural gas formations |
| 05/14/1999 | CA2308306A1 Improvement in a side element of a drilling template |
| 05/12/1999 | DE19806923C1 Sealing water well |
| 05/12/1999 | DE19748907C1 Antriebskopf für ein drehantreibbares Gestänge, insbesonders zum Antreiben einer Bohrlochpumpe Drive head for a rotatably driven boom, especially for driving a downhole pump |
| 05/12/1999 | CN2318396Y Safety multistage priming device for oil-gas well |
| 05/12/1999 | CN2318395Y Screw pump clearance oil producing ground driving device |
| 05/12/1999 | CN1216596A Progressive cavity pump using composite materials |
| 05/12/1999 | CN1216337A Chemically induced stimulations of subterranean carbonaceous formations with gaseous oxidants |
| 05/12/1999 | CN1043309C 过滤器 Filter |
| 05/11/1999 | US5902378 Continuous flow downhole gas separator for processing cavity pumps |
| 05/11/1999 | US5901795 Well collision avoidance |
| 05/11/1999 | US5901789 Deformable well screen |
| 05/11/1999 | CA2137410C Fluid loss control additives |
| 05/06/1999 | WO1999022115A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/06/1999 | EP0913554A2 Method and apparatus for cementing a well |
| 05/06/1999 | EP0912651A1 Clay-free biodegradable wellbore fluid and method for using said fluid |
| 05/06/1999 | CA2307771A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/05/1999 | CN1215790A Matching technique for changing production well into geothermal exploitation well |
| 05/04/1999 | US5900544 System and method for detecting upward growth of a hydraulic subterranean fracture in real time |
| 05/04/1999 | US5900053 Light weight high temperature well cement compositions and methods |
| 05/04/1999 | US5899369 Bracelet closure aid |
| 05/04/1999 | US5899274 Solvent-assisted method for mobilizing viscous heavy oil |
| 05/04/1999 | US5899273 Eductor/ejector apparatus and the process for increasing fluid recovery from geothermal wells |
| 05/04/1999 | US5899272 Fracture treatment system for wells |
| 05/04/1999 | US5899271 Particle control screen assembly for a perforated pipe used in a well, a sand filter system, and methods of making the same |
| 05/04/1999 | US5899270 Side intake valve assembly |
| 05/04/1999 | US5899269 Flameless combustor |
| 05/04/1999 | CA2100433C Drive head for rotary down hole pump |
| 04/29/1999 | WO1999020873A1 Sand trap |
| 04/29/1999 | WO1999005387A3 Variable choke for use in a subterranean well and method of controlling a fluid flow |
| 04/28/1999 | EP0910725A1 Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/28/1999 | EP0910724A1 Downhole cyclone separation |
| 04/28/1999 | EP0910723A1 Device for limiting the bending radius of a flexible duct |
| 04/28/1999 | CN2316502Y Oil-submersible speed reducer |
| 04/28/1999 | CN2316455Y Powder plastic sand filtering pipe |
| 04/28/1999 | CN2316454Y Full-sealed anti-theft Christmas tree |
| 04/27/1999 | US5896928 Flow restriction device for use in producing wells |
| 04/27/1999 | US5896926 Packer type groundwater sampling system and water sampling method |
| 04/27/1999 | US5896924 Computer controlled gas lift system |
| 04/27/1999 | CA2122163C Method and apparatus for erosive stimulation of open hole formations |
| 04/22/1999 | WO1999019600A1 Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| 04/22/1999 | WO1999019595A1 Method and system for drilling underbalanced radial wells utilizing a dual string technique in a live well |
| 04/21/1999 | EP0909875A2 Method of completing well in unconsolidated subterranean zone |
| 04/21/1999 | EP0909874A2 Completing wells in unconsolidated subterranean zones |
| 04/21/1999 | EP0909873A2 A process for the thermo-hydraulic control of gas hydrates |
| 04/21/1999 | EP0909872A2 Electrical submergible motor protector |
| 04/21/1999 | EP0909871A1 Method for treating water-containing natural gas wells and gas storage wells |
| 04/21/1999 | EP0804678B1 Method of creating a casing in a borehole |
| 04/21/1999 | CN2315293Y Super deep penetrating perforating bumb |
| 04/21/1999 | CN2315292Y Flexible universal joint for wellhead of oil pumping machine well |
| 04/20/1999 | US5894888 Horizontal well fracture stimulation methods |
| 04/16/1999 | CA2250593A1 Methods and apparatus for completing wells in unconsolidated subterranean zones |
| 04/16/1999 | CA2250563A1 Methods of completing wells in unconsolidated subterranean zones |
| 04/15/1999 | WO1999018328A1 Method and apparatus for hanging tubulars in wells |
| 04/14/1999 | EP0907822A1 Method for expanding a steel tubing and well with such as tubing |
| 04/14/1999 | CN2314093Y Automatically selective three phase oil well metering instrument |
| 04/14/1999 | CN2314091Y High energy composite positive pressure dual jetting perforator for oil well or gas well |
| 04/14/1999 | CN2314090Y Protector for mechanical manometers |
| 04/14/1999 | CN1213689A Chemically induced stimulations of subterranean carbonaceous formations with aqueous oxidizing solutions |
| 04/13/1999 | US5893708 Rotating piston for ball and seat valve assembly and downhole pump utilizing said valve assembly |
| 04/13/1999 | US5893416 Porous ceramic beads; tubular filter inhibiting corrosion and sclae formation |
| 04/13/1999 | US5893415 Gas diversion tool |
| 04/13/1999 | US5893414 Device for intensification of hydrocarbon production and hydrocarbons production system |
| 04/08/1999 | WO1999005385A3 Seal arrangement |
| 04/07/1999 | EP0906491A1 Method and apparatus for testing, completing and/or maintaining wellbores using a sensor device |
| 04/07/1999 | EP0614505B1 Template and process for drilling and completing multiple wells |
| 04/07/1999 | CN2313075Y Crank-swinging type torque-variable oil-beaming machine |