| 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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| 01/14/2004 | CN2599237Y Oil well head powerless type uniform speed chemicals adding device |
| 01/14/2004 | CN2599236Y Oil field injection well high pressure dispersion and mixing machine |
| 01/14/2004 | CN2599235Y Bottom part antislag water distribution apparatus |
| 01/14/2004 | CN2599234Y Automatic diameter adjusting moment changing balanced beam type oil extraction machine |
| 01/14/2004 | CN2599233Y Direct driving beam-pumping unit |
| 01/14/2004 | CN2599232Y Reversible rotary head sheave oil pumping machine |
| 01/14/2004 | CN2599231Y Displacement sensing device in oil field oil puping machine indicator diagram test |
| 01/14/2004 | CN2599230Y Hydraulic self-control beam-pumping unit |
| 01/14/2004 | CN2599220Y Eccentric integrated type water distribution packer |
| 01/14/2004 | CN2598621Y Filter for cleaning polymer and ternary solution |
| 01/13/2004 | US6677861 Monitoring system |
| 01/13/2004 | US6675902 Progressive cavity wellbore pump and method of use in artificial lift systems |
| 01/13/2004 | US6675901 Use of helically wound tubular structure in the downhole environment |
| 01/13/2004 | US6675898 Apparatus for preventing critical annular pressure buildup |
| 01/13/2004 | US6675896 Detonation transfer subassembly and method for use of same |
| 01/13/2004 | US6675893 Single placement well completion system |
| 01/13/2004 | US6675891 Apparatus and method for gravel packing a horizontal open hole production interval |
| 01/13/2004 | US6675747 System for and method of generating steam for use in oil recovery processes |
| 01/09/2004 | CA2392737A1 Method for measuring particle concentration during injection pumping operations |
| 01/08/2004 | WO2004003506A2 In-situ detection and analysis of coal bed methane formations |
| 01/08/2004 | WO2004003416A1 Reinforced tubular threaded joint for improved sealing after plastic expansion |
| 01/08/2004 | WO2004003341A1 A method and system for combating the formation of emulsions |
| 01/08/2004 | WO2004003340A1 Bore-lining tubing |
| 01/08/2004 | WO2004003339A1 Subsea hydrocarbon production system |
| 01/08/2004 | WO2004003337A1 System for radially expanding a tubular member |
| 01/08/2004 | WO2004003335A2 System and method to separate particles from water |
| 01/08/2004 | WO2004003331A2 Non-corrosive amphoteric surfactants and method of well treatment |
| 01/08/2004 | WO2004003328A2 Method and system for controlling devices in hydrocarbon production |
| 01/08/2004 | WO2004003327A2 Helically wound insert for expandable tubulars |
| 01/08/2004 | US20040003927 Expandable downhole tubular |
| 01/08/2004 | US20040003926 System and method for fail-safe disconnect from a subsea well |
| 01/08/2004 | US20040003922 Method for selectively treating two producing intervals in a single trip |
| 01/08/2004 | CA2490786A1 System for radially expanding a tubular member |
| 01/08/2004 | CA2490784A1 In-situ detection and analysis of coal bed methane formations |
| 01/08/2004 | CA2490363A1 Non-corrosive amphoteric surfactants and method of well treatment |
| 01/07/2004 | EP1378627A1 Method for developing a hydrocarbon reservoir (variants) and complex for carrying out said method (variants) |
| 01/07/2004 | EP1378626A2 System and method for fail-safe disconnect from a subsea well |
| 01/07/2004 | EP1378554A1 Hydrophilic polymer concentrates |
| 01/07/2004 | EP1377727A1 Method and apparatus for controlling downhole flow |
| 01/07/2004 | CN2597709Y Hydraulic oil pump |
| 01/07/2004 | CN2597665Y Igniting electric furnace |
| 01/07/2004 | CN2597664Y Double towing beam-pumping unit |
| 01/07/2004 | CN1465847A Crude oil production adopting firstly burning oil layer and then steam driving mode |
| 01/07/2004 | CN1465846A Method and apparatus for making screen pipe to be drawn out easily |
| 01/07/2004 | CN1133816C Recognition and control method for affection of sucker rod's dilatation deformation to pumping effect for pumping unit |
| 01/07/2004 | CN1133815C Energy-saving efficient petroleum recovering for automatic digital petroleum recovering machine |
| 01/07/2004 | CN1133486C Lignin sulfonate surfactant for oil field, its preparatino process and use in tertiary oil recovery |
| 01/06/2004 | US6672804 Device and method for maintaining and guiding a riser, and method for transferring a riser onto a floating support |
| 01/06/2004 | US6672405 Perforating gun assembly for use in multi-stage stimulation operations |
| 01/06/2004 | US6672393 Reciprocating pump dump valve and methods of use |
| 01/06/2004 | US6672392 Gas recovery apparatus, method and cycle having a three chamber evacuation phase for improved natural gas production and down-hole liquid management |
| 01/06/2004 | US6672391 Subsea well production facility |
| 01/06/2004 | US6672387 Oil and gas production with downhole separation and reinjection of gas |
| 01/06/2004 | US6672385 Combined liner and matrix system |
| 01/06/2004 | US6672335 Automated dump sand separator control system |
| 01/06/2004 | CA2306976C Method and apparatus for hydraulic fracturing analysis and design |
| 01/06/2004 | CA2299398C Assembly and process for drilling and completing multiple wells |
| 01/06/2004 | CA2117085C Downhole activated system for perforating a wellbore |
| 01/02/2004 | EP1375820A1 Steel pipe for use as embedded expanded pipe, and method of embedding oil-well steel pipe |
| 01/02/2004 | EP1373682A1 Power connection to and/or control of wellhead trees |
| 01/02/2004 | EP1105618B1 Device for drilling or draining holes in soil or rock |
| 01/01/2004 | US20040000791 Helically wound expandable tubular insert |
| 01/01/2004 | US20040000402 Methods of consolidating proppant and controlling fines in wells |
| 12/31/2003 | WO2004001187A1 Method for increasing the penetrability of the bottom-hole area of an oil-bearing formation |
| 12/31/2003 | WO2004001186A1 Cutting process to size rips at grooved tubes for petroleum abstraction in horizontal and vertical wells |
| 12/31/2003 | WO2004001185A1 A pumping unit with a curved and folded walking beam |
| 12/31/2003 | WO2004001184A1 An oil pumping unit with a supporting pipe |
| 12/31/2003 | WO2004001183A1 Methods of sealing expandable pipe in well bores and sealing compositions |
| 12/31/2003 | WO2004001182A2 Internal support apparatus for downhole tubular structures |
| 12/31/2003 | WO2004001181A1 Multi-point high pressure seal for expandable tubular connections |
| 12/31/2003 | WO2004001180A1 Telescopic guide pipe for offshore drilling |
| 12/31/2003 | WO2004001179A2 Method for selectively treating two producing intervals in a single trip |
| 12/31/2003 | WO2003055616A3 Tubing expansion |
| 12/31/2003 | WO2002002900A8 Apparatus and method to complete a multilateral junction |
| 12/31/2003 | CN2596009Y Centralized chemicals adding apparatus for oil-prodn. transfer station |
| 12/31/2003 | CN2596008Y Mobile well completion system with finely sectionally adjusting geopsphere fluid or filling-in fluid function |
| 12/31/2003 | CN2596007Y Double-hole and self-locking type petroleum perforating bullet rack centering device |
| 12/31/2003 | CN2596006Y Sieve tube having flow-rate control device |
| 12/31/2003 | CN2596005Y Ring-gear and long-stoke type oil-pumping unit |
| 12/31/2003 | CN2596001Y Well-head water distributor |
| 12/31/2003 | CN2595999Y Needle and taper type steam-filling and hot oil prodn. packer |
| 12/31/2003 | CN2595992Y Well-head thermal stress compensator for hot injection and hot prodn. of thickened oil recovery |
| 12/31/2003 | CN2595981Y 4 1/2´“é casing well fracturing pipe string |
| 12/31/2003 | CN1464195A Combination oil-well pump |
| 12/31/2003 | CN1464175A Curved beam-pumping unit driven by pulley block |
| 12/31/2003 | CN1464170A Oil exploitation super short radius horizontal drilling completion tool and process thereof |
| 12/30/2003 | US6669843 Apparatus for mixing fluids |
| 12/30/2003 | US6668943 Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser |
| 12/30/2003 | US6668935 Valve for use in wells |
| 12/30/2003 | US6668934 Method for installing a water well pump |
| 12/30/2003 | US6668932 Apparatus and methods for isolating a wellbore junction |
| 12/30/2003 | US6668930 Method for installing an expandable coiled tubing patch |
| 12/30/2003 | US6668928 Resilient cement |
| 12/30/2003 | US6668926 Methods of consolidating proppant in subterranean fractures |
| 12/30/2003 | US6668925 ESP pump for gassy wells |
| 12/30/2003 | US6668923 Positive indication system for well annulus cement displacement |
| 12/30/2003 | US6668922 Method of optimizing the design, stimulation and evaluation of matrix treatment in a reservoir |
| 12/30/2003 | US6668920 Wellscreen having helical support surface |
| 12/30/2003 | US6668918 Method and system for accessing subterranean deposit from the surface |
| 12/25/2003 | US20030236173 To increase the viscosity or decrease the fluid loss of well drilling and servicing fluids |