| 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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| 12/27/2002 | WO2002092963A8 A gas lift method with surfactant injection |
| 12/27/2002 | CA2450651A1 Casing wear band and method of attachment |
| 12/26/2002 | US20020197174 Electrical pump, and method for using plurality of submersible electrical pumps for well completion |
| 12/26/2002 | US20020195256 Downhole sealing |
| 12/26/2002 | US20020195254 Improved Progressive cavity wellbore pump for use in artificial lift systems |
| 12/26/2002 | US20020195253 Method and apparatus for open hole gravel packing |
| 12/26/2002 | US20020195252 Tie back for use with expandable tubulars |
| 12/26/2002 | US20020195251 Sub-sea membrane separation system with temperature control |
| 12/26/2002 | US20020195250 System and method for separation of hydrocarbons and contaminants using redundant membrane separators |
| 12/26/2002 | US20020195248 Fracturing port collar for wellbore pack-off system, and method for using same |
| 12/26/2002 | US20020195246 Enhancement of flow rates through porous media |
| 12/26/2002 | US20020195245 Expandable sand screen for use in a wellbore |
| 12/26/2002 | US20020194907 Method and apparatus for the detection of bubble point pressure |
| 12/25/2002 | CN2527741Y Sandpump |
| 12/25/2002 | CN2527704Y Equilibrium sand blower |
| 12/25/2002 | CN2527703Y Perforating gun without blind hole |
| 12/25/2002 | CN1387617A Method and system for suppressing and controlling slug flow in multi-phase fluid stream |
| 12/25/2002 | CN1387603A Method for processing production layer in bottom hole area, packer therefor and method for securing packer inside bottom of hole |
| 12/25/2002 | CN1386957A Fracture technology for injection well for preventing closing of fracture opening and increasing injection |
| 12/25/2002 | CN1386956A Boosting water injector for oil field |
| 12/25/2002 | CN1386955A Oil recovery technology with self-balanced interactive intelligent electromechanical pumping unit for cluster well |
| 12/25/2002 | CN1097136C Method for in-situ extraction of gas from coal seams |
| 12/25/2002 | CN1097135C Method for reducing waste component in hydrocarbon fluid |
| 12/25/2002 | CN1097133C Method for transporting and installing expandable steel tube |
| 12/24/2002 | US6497289 Method of creating a casing in a borehole |
| 12/24/2002 | US6497288 Deviated borehole drilling assembly |
| 12/24/2002 | US6497287 Production system and method for producing fluids from a well |
| 12/24/2002 | US6497286 Method and apparatus for drilling a plurality of offshore underwater wells |
| 12/24/2002 | US6497285 Low debris shaped charge perforating apparatus and method for use of same |
| 12/24/2002 | US6497284 Single trip perforating and fracturing/gravel packing |
| 12/24/2002 | US6497281 Cable actuated downhole smart pump |
| 12/24/2002 | US6497278 Circulation control device |
| 12/24/2002 | US6497277 Internal gate valve for flow completion systems |
| 12/19/2002 | WO2002086286A3 Method of and apparatus for casing a borehole |
| 12/19/2002 | WO2002081864A3 Expandable coaxial tubings |
| 12/19/2002 | US20020193976 Method and device for neutralizing, by controlled gas injection, the formation of liquid slugs at the foot of a riser connected to a multiphase fluid transport pipe |
| 12/19/2002 | US20020191969 In situ thermal processing of a coal formation in reducing environment |
| 12/19/2002 | US20020191968 In situ thermal processing of a hydrocarbon containing formation to produce hydrocarbon fluids and synthesis gas |
| 12/19/2002 | US20020189864 Method for the drilling of oil wells |
| 12/19/2002 | US20020189818 Expandable downhole tubing |
| 12/19/2002 | US20020189816 Wellbore casing |
| 12/19/2002 | US20020189815 Flow control regulation method and apparatus |
| 12/19/2002 | US20020189813 Flow completion system |
| 12/19/2002 | US20020189809 Methods and apparatus for gravel packing, fracturing or frac packing wells |
| 12/19/2002 | US20020189808 Methods and apparatus for gravel packing or frac packing wells |
| 12/19/2002 | US20020189807 Method and system for oil and water separation utilizing a hydrostatic pressure head for disposal of water |
| 12/19/2002 | US20020189802 Perforating gun assembly for use in multi-stage stimulation operations |
| 12/19/2002 | US20020189801 Method and system for accessing a subterranean zone from a limited surface area |
| 12/19/2002 | US20020189696 Expanding tubing |
| 12/19/2002 | US20020189483 Shaped recesses in explosive carrier housings that provide for improved explosive performance |
| 12/19/2002 | US20020189482 Debris free perforating system |
| 12/19/2002 | US20020189445 Process for the wellbore separation of CO2 from hydrocarbon gas |
| 12/18/2002 | EP1266123A1 Subsea production system |
| 12/18/2002 | EP1266122A1 Downhole separation and injection of produced water |
| 12/18/2002 | EP1266121A1 Methods for improving oil production |
| 12/18/2002 | CN2526554Y Electric oil submersible screw pump |
| 12/18/2002 | CN2526546Y Speed reducer for electric submersible screw pump |
| 12/18/2002 | CN2526537Y Spring friction pump |
| 12/18/2002 | CN2526536Y Anti-seizing device for oil pump |
| 12/18/2002 | CN2526535Y Piston-gas pump for oil well |
| 12/18/2002 | CN2526502Y Layered constant steam distributing valve for thickened oil heat recovery well |
| 12/18/2002 | CN2526498Y Ground drive of screw pump for extracting oil |
| 12/18/2002 | CN1385595A Improved intensified petroleum production method |
| 12/17/2002 | US6496448 Transducer receiving voltage inputs, such as square waves, rich in harmonics |
| 12/17/2002 | US6494271 Offshore floating production method |
| 12/17/2002 | US6494266 Controls bridge for flow completion systems |
| 12/17/2002 | US6494264 Wellbore flow control device |
| 12/17/2002 | US6494261 Apparatus and methods for perforating a subterranean formation |
| 12/17/2002 | US6494260 Single trip perforating and fracturing/gravel packing |
| 12/17/2002 | US6494258 Downhole gas-liquid separator for production wells |
| 12/17/2002 | US6494257 Flow completion system |
| 12/17/2002 | US6494256 Apparatus and method for zonal isolation |
| 12/17/2002 | CA2135187C Gravel packing of wells |
| 12/17/2002 | CA2076239C Method of removing a mineable product from an underground seam |
| 12/15/2002 | CA2350681A1 Pipe centralizer and method of attachment |
| 12/12/2002 | WO2002099249A1 Discharging sand from a vessel at elevated pressure |
| 12/12/2002 | WO2002099247A1 In-situ casting of well equipment |
| 12/12/2002 | WO2002099245A1 Use of helically wound tubular structure in the downhole environment |
| 12/12/2002 | WO2002086287A3 Conveying instrumentation within a borehole |
| 12/12/2002 | WO2002084073A3 Pressure wave expansion tool |
| 12/12/2002 | WO2002061461A3 A method and apparatus for a tubing conveyed perforating guns fire identification system using enhanced marker material |
| 12/12/2002 | US20020187037 Technique for producing a high gas-to-liquid ratio fluid |
| 12/12/2002 | US20020185281 Technique for deploying a liner into a subterranean wellbore |
| 12/12/2002 | US20020185280 Internal gate valve for flow completion systems |
| 12/12/2002 | US20020185277 Ported sub treatment system |
| 12/12/2002 | US20020185275 Method and apparatus for orienting perforating devices and confirming their orientation |
| 12/12/2002 | US20020185274 Apparatus and methods for expanding tubulars in a wellbore |
| 12/11/2002 | EP1264961A1 Method of producing petroleum |
| 12/11/2002 | EP1264075A1 Method and apparatus for stimulation of multiple formation intervals |
| 12/11/2002 | EP1264073A1 Downhole surge pressure reduction and filtering apparatus |
| 12/11/2002 | CN2525277Y Gas automatic compensation anti-sand scale clamp oil pump |
| 12/11/2002 | CN2525251Y Multifunction fast pressure sampling device |
| 12/11/2002 | CN2525250Y Nano vertical ground oil pumping unit |
| 12/11/2002 | CN2525249Y Load unloading device of oil pumping unit well |
| 12/11/2002 | CN2525248Y Distance regulating composite mule-head economic oil pumping unit |
| 12/11/2002 | CN1384271A Vertical-pipe pumping unit |
| 12/11/2002 | CN1384270A Beam-balancing pumping unit without inertia force |
| 12/11/2002 | CN1095922C Multi-lateral branch tool, device for guarantee of pressure completeness and method for construction of multi-lateral branch well |
| 12/11/2002 | CN1095702C In-situ remediation of contaminated heterogeneous soil |
| 12/10/2002 | US6491105 Cross-over housing for gas lift valve |