| 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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| 01/16/2003 | US20030010496 Apparatus and method for gravel packing an interval of a wellbore |
| 01/16/2003 | US20030010491 System and method for the production of oil from low volume wells |
| 01/16/2003 | US20030010204 Slugging control |
| 01/15/2003 | EP1274992A1 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 01/15/2003 | EP1274921A1 Method and apparatus for injecting one or more fluids into a borehole |
| 01/15/2003 | CN2531135Y Efficiency-promoting valve of oil-well pump |
| 01/15/2003 | CN2531134Y Reciprocating elastic nano sand control pump |
| 01/15/2003 | CN2531133Y Feedback high viscosity oil pump plunger pump barrel |
| 01/15/2003 | CN2531131Y Drainable sand control oil-well pump |
| 01/15/2003 | CN2531107Y 平衡器 Balancer |
| 01/15/2003 | CN2531106Y Big-hole volumetric perforation charge |
| 01/15/2003 | CN1391029A Lifter |
| 01/15/2003 | CN1391028A Pumping unit with three-segment moving beam |
| 01/15/2003 | CN1098967C Foldable tube |
| 01/15/2003 | CN1098966C Deformable liner tube and its use |
| 01/15/2003 | CN1098965C Full-automatic oil producing unit |
| 01/14/2003 | US6505691 Subsea mud pump and control system |
| 01/14/2003 | US6505685 Methods and apparatus for creating a downhole buoyant casing chamber |
| 01/14/2003 | US6505684 Hydraulic actuator |
| 01/14/2003 | US6505683 Process for purification by combination of an effluent that contains carbon dioxide and hydrocarbons |
| 01/14/2003 | US6505682 Controlling production |
| 01/14/2003 | US6505681 Rehabilitation of landfill gas recovery wells |
| 01/14/2003 | CA2196376C Method for increasing methane recovery from a subterranean coal formation by injection of tail gas from a hydrocarbon synthesis process |
| 01/14/2003 | CA2135446C Methods for monitoring reservoir-bearing formations, installations and devices for their implementation |
| 01/14/2003 | CA2073290C Fracturing method and apparatus |
| 01/11/2003 | CA2353097A1 Data acquisition system |
| 01/09/2003 | WO2003002849A1 Method and apparatus for detonating an explosive charge |
| 01/09/2003 | WO2002090711A3 Combined perforation and cement retainer tool for plugging a wellbore |
| 01/09/2003 | US20030006044 Method and apparatus for sleeving a borehole |
| 01/09/2003 | US20030006039 In situ thermal processing of a hydrocarbon containing formation with a selected vitrinite reflectance |
| 01/08/2003 | EP0980462B1 Expandable well screen |
| 01/08/2003 | CN2530061Y Seat sealable thick oil pump |
| 01/08/2003 | CN2530060Y Magnetic nano-glass sealing and energy saving sand control pump |
| 01/08/2003 | CN2530038Y Strong pulse gas power fracturing unit |
| 01/08/2003 | CN2530037Y Pressure tapping, water injection distributing filler |
| 01/08/2003 | CN2530036Y Core of water injection mandrel |
| 01/08/2003 | CN2530035Y Sand control plugging device |
| 01/08/2003 | CN2530034Y Full underground production wellhead appts. |
| 01/08/2003 | CN2530033Y Intelligence counterweight regulator of pumping unit |
| 01/08/2003 | CN2530032Y Oil well pumping unit |
| 01/08/2003 | CN2530031Y Limit oil pipe skimming swab |
| 01/08/2003 | CN1390275A Method for expanding a tubular element in a wellbore |
| 01/08/2003 | CN1390274A Wellbore system having non-return valve |
| 01/08/2003 | CN1389641A Movable injection station and its injection and polymerization technique |
| 01/08/2003 | CN1389639A Immobile well cylinder pile for stratum-shifting oil exploitation and its implementation |
| 01/08/2003 | CN1389538A Method for fracturing rock-layer underground |
| 01/08/2003 | CN1098405C Method for installing scrolled resilient sheet alongside inner surface of fluid conduit |
| 01/07/2003 | US6503395 Delivering to subterranean aquifer an oxygen source and microbial culture to degrade contaminants to carbon dioxide |
| 01/07/2003 | US6503021 Method and apparatus for connecting underwater conduits |
| 01/07/2003 | US6502640 Hydraulic actuator |
| 01/07/2003 | US6502639 Hollow tubing pumping system |
| 01/07/2003 | US6502635 Sub-sea membrane separation system with temperature control |
| 01/07/2003 | US6502456 Method and apparatus for measuring multiple parameters of steam |
| 01/07/2003 | CA2236243C Chemically induced permeability enhancement of subterranean coal formation |
| 01/07/2003 | CA2215266C Apparatus and process for drilling and completing multiple wells |
| 01/07/2003 | CA2059568C Insulating composition |
| 01/04/2003 | CA2352274A1 Oil sand spiral surface mining apparatus |
| 01/03/2003 | WO2003001029A1 Electrical pump for use in well completion |
| 01/03/2003 | WO2003001028A1 Progressive cavity wellbore pump for use in artificial lift systems |
| 01/03/2003 | WO2003001027A1 Expandable sand screen for use in a wellbore |
| 01/03/2003 | WO2003001026A1 Tie back for use with expandable tubulars |
| 01/03/2003 | WO2003001019A2 Sleeve valve and method for providing a controllable fluid flow |
| 01/03/2003 | WO2003000825A2 Sub-sea membrane separation system with temperature control |
| 01/03/2003 | WO2002092961A3 Fluid transportation system |
| 01/02/2003 | US20030001753 Method and apparatus for wireless transmission down a well |
| 01/02/2003 | US20030000875 Well screen having a line extending therethrough |
| 01/02/2003 | US20030000711 Injecting steam into reservoir and recovering fraction of the hydrocarbons and forming heated chamber in reservoir; continuing to inject steam into the reservoir and mobilizing and recovering hydrocarbons; injecting a solvent |
| 01/02/2003 | US20030000709 Expandable liner and associated methods of regulating fluid flow in a well |
| 01/02/2003 | US20030000706 High impact communication and control system |
| 01/02/2003 | US20030000703 Method and apparatus for perforating a well |
| 01/02/2003 | US20030000702 Apparatus and method for sequentially packing an interval of a wellbore |
| 01/02/2003 | US20030000701 Apparatus and method for progressively gravel packing an interval of a wellbore |
| 01/02/2003 | US20030000700 Screen assembly and method for gravel packing an interval of a wellbore |
| 01/02/2003 | US20030000699 Apparatus and method for gravel packing an interval of a wellbore |
| 01/02/2003 | US20030000696 System for displacement of water in coalbed gas reservoirs |
| 01/02/2003 | US20030000411 Method and apparatus for detonating an explosive charge |
| 01/02/2003 | EP1268975A2 Sand removal and device retrieval tool |
| 01/02/2003 | EP1268974A2 Tool and method for managing fluid flow in a well |
| 01/02/2003 | EP1268972A1 Pressure boost pump |
| 01/02/2003 | EP1268115A1 Method of joining metal oilfield tubulars and well provided therewith |
| 01/01/2003 | CN2529001Y Deacid jet injector |
| 01/01/2003 | CN2529000Y Dredge-nut underground double-pipe hydraulic injection pump |
| 01/01/2003 | CN2528978Y Ground driving device for screw oil-well pump |
| 01/01/2003 | CN2528976Y Underground screw pump driven by oil-submersible D.C. Dynamo |
| 01/01/2003 | CN2528962Y Piston-type oil-water energy converter |
| 01/01/2003 | CN2528961Y Underground hydraulic oil-well pump |
| 01/01/2003 | CN2528933Y Oil well fracture gravel filling anti-sand device |
| 01/01/2003 | CN2528932Y Linkage variable-pitch beam-pumping unit |
| 01/01/2003 | CN1388303A Dynamic surface closed-loop control system for oil well |
| 12/31/2002 | US6499536 Method to increase the oil production from an oil reservoir |
| 12/31/2002 | US6499406 Blasting apparatus for forming horizontal underground cavities and blasting method using the same |
| 12/31/2002 | US6499344 Apparatus and method to obtain representative samples of oil well production |
| 12/31/2002 | CA2214707C Method for measuring of flow and flowmeter |
| 12/31/2002 | CA2201497C System for pumping well fluids |
| 12/27/2002 | WO2002103161A2 Perforating gun assembly for use in multi-stage stimulation operations |
| 12/27/2002 | WO2002103157A1 Process for the recovery of oil from a natural oil reservoir |
| 12/27/2002 | WO2002103156A1 Method for preparing wellbore casing for installation |
| 12/27/2002 | WO2002103155A1 Casing wear band and method of attachment |
| 12/27/2002 | WO2002103154A1 Pipe centralizer and method of attachment |
| 12/27/2002 | WO2002103150A2 Tubing expansion |