| 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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| 06/13/1996 | CA2207372A1 Filter for subterranean wells |
| 06/12/1996 | EP0715678A1 Method for cyclone separation of oil and water and means for separating of oil and water |
| 06/12/1996 | EP0444170B1 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| 06/12/1996 | CN1124517A Sand screen structure |
| 06/12/1996 | CN1124318A Series double hydro-cylinder potential energy balance type full stroke uniform straight motion hydraulic oil pumping machine |
| 06/12/1996 | CN1124317A Sand-proof sand extracting and oil pumping combining device |
| 06/11/1996 | US5525146 Rotary gas separator |
| 06/11/1996 | US5525040 Controller for oil wells with a thermal dispersion probe |
| 06/11/1996 | US5525008 Oxidation of impurities |
| 06/11/1996 | US5524709 Method for acoustically coupling sensors in a wellbore |
| 06/11/1996 | US5524665 Level control system for gas-liquid separators |
| 06/07/1996 | CA2137380A1 Multiport pumping/injection wells for remediation of contaminated groundwater |
| 06/05/1996 | EP0699271A4 Sand screen structure |
| 06/05/1996 | EP0651852A4 Gravel pack screen for well completions. |
| 06/05/1996 | CN2228637Y Heat pipe type domestic water heater |
| 06/04/1996 | US5523470 Surfactant, process for its production and use |
| 06/04/1996 | US5523066 Treatment of lead sulphide bearing minerals |
| 06/04/1996 | US5522465 Method and apparatus for a safety system |
| 06/04/1996 | US5522463 Downhole oil well pump apparatus |
| 06/04/1996 | US5522418 Differential pressure operated gas lift valve |
| 05/29/1996 | EP0713954A2 Perforating gun actuator |
| 05/29/1996 | EP0713953A2 Method of drilling and completing wells |
| 05/29/1996 | EP0713951A2 Method of drilling and completing wells |
| 05/29/1996 | CN1031898C Down-hole gas anchor device |
| 05/28/1996 | US5520483 Method and system for remediation of groundwater contamination |
| 05/28/1996 | US5520252 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 05/28/1996 | US5520250 Affixing crosslinking agent to proppant particles, placing particles in fracturing fluid, conveying to formation |
| 05/28/1996 | US5520249 Process for the pretreatment of a natural gas containing hydrogen sulphide |
| 05/28/1996 | US5520247 Method of producing a fluid from an earth formation |
| 05/23/1996 | CA2163410A1 Perforating gun actuator |
| 05/21/1996 | US5518996 Fluids for oilfield use having high-solids content |
| 05/21/1996 | US5518341 Production fluid assembly for remote offshore facilities storage |
| 05/21/1996 | CA2092308C Sintered metal sand screen |
| 05/17/1996 | WO1996004521A3 Apparatus and method for perforating and fracturing |
| 05/15/1996 | EP0711903A2 Separation of oil and gas phases in wellhead fluids |
| 05/15/1996 | EP0711902A2 Nitrogen/Carbon Dioxide combination fracture treatment |
| 05/15/1996 | EP0640001A4 Linear contaminant remediation system. |
| 05/15/1996 | CN2227196Y Anti-backward and anti-skid apparatus for coal-winning machine cadle torring clamp on high-grade ordinary recovery working face |
| 05/15/1996 | CN1122619A Preform or matrix tubular structure for well casing |
| 05/15/1996 | CN1122406A Perforator |
| 05/14/1996 | US5517593 Control system for well stimulation apparatus with response time temperature rise used in determining heater control temperature setpoint |
| 05/14/1996 | US5516360 Abrasion resistant gas separator |
| 05/14/1996 | US5515924 Technique for restoring or increasing flow to oil and gas wells |
| 05/14/1996 | US5515923 Oil and gas well productivity |
| 05/14/1996 | US5515922 Recovery tool |
| 05/14/1996 | US5515920 For fracturing an underground formation penetrated by a well bore |
| 05/14/1996 | US5515919 Enhanced oil recovery process including the simultaneous injection of a miscible gas and water |
| 05/14/1996 | US5515915 Well screen having internal shunt tubes |
| 05/14/1996 | US5515880 Spoolable coiled tubing mandrel and gas lift valves |
| 05/09/1996 | WO1996013650A1 Producing methane gas from a coal seam |
| 05/08/1996 | CN2226641Y Liquid phase conducting type petroleum thermal producing device |
| 05/08/1996 | CN1121980A Perforation and oil-pumping united well completion pipe string for oil gas well |
| 05/07/1996 | US5514645 Method of gelling hydrocarbons and fracturing subterranean formations |
| 05/07/1996 | US5513706 Method for improving formation stability surrounding a deviated wellbore |
| 05/07/1996 | US5513705 Enhanced oil recovery |
| 05/07/1996 | US5513704 Flow back fracture stimulation system |
| 05/02/1996 | WO1996012866A1 System for pumping well fluids |
| 05/02/1996 | WO1996012865A1 Tubing conveyed perforating system with completion fluid loss control |
| 05/01/1996 | EP0709545A2 Deep water slim hole drilling system |
| 05/01/1996 | CN2226144Y High-temp-and high-pressure-resistant integrated sieve tube |
| 05/01/1996 | CN2226143Y Coal mud dredger for mine tunnel |
| 05/01/1996 | CN2226142Y Pin shaft butt-jointed polish rod clamp |
| 05/01/1996 | CN1031729C Permanent magnetic wax-proof oil pump |
| 04/30/1996 | US5512088 Filtering device for filtering moisture from a natural gas stream |
| 04/30/1996 | US5511619 Polymer liners in rod pumping wells |
| 04/30/1996 | US5511616 Hydrocarbon recovery method using inverted production wells |
| 04/30/1996 | CA1338279C Method for underground disposal of liquid waste |
| 04/24/1996 | EP0707899A1 Process and apparatus for removing contaminants from a contaminated area of ground |
| 04/24/1996 | EP0579631B1 Water extraction components produced by adhesive bonds and their use |
| 04/24/1996 | EP0505441B1 Method of supporting fractures in geological formations and hydraulic fluid composition for same |
| 04/24/1996 | CN1121138A Long-passage and large-section underground coal gasification in mine |
| 04/23/1996 | US5509760 Method of rapid purging of contaminants from a contaminated area of soil or ground water |
| 04/23/1996 | US5509757 To remove fluid contaminants from a vadose zone of subsurface area |
| 04/23/1996 | US5509483 Method and apparatus for anchoring a well screen on a perforated mandrel of stainless steel |
| 04/23/1996 | US5509482 Perforation trigger bypass assembly and method |
| 04/23/1996 | US5509481 Method of perforating including an automatic release apparatus suspending by wireline or coiled tubing in a wellbore for perforating a long length interval of the wellbore in a single run using a gun string longer than a wellhead lubricator |
| 04/23/1996 | US5509480 Chemical cutter and method for high temperature tubular goods |
| 04/23/1996 | US5509479 Subterranean remediation pump and process for use |
| 04/23/1996 | US5509478 Method of determining the quality of steam for stimulating hydrocarbon production |
| 04/18/1996 | WO1996011324A1 Apparatus for movement along an underground passage and method using same |
| 04/17/1996 | EP0707134A1 Method of oil recovery |
| 04/17/1996 | EP0706471A1 System for offshore production of hydrocarbons |
| 04/17/1996 | EP0706427A1 In-situ remediation of contaminated heterogeneous soils |
| 04/16/1996 | US5507955 Method of operating hydrocyclone systems by adding water to maintain flow rates |
| 04/16/1996 | US5507346 Composite well flow conductor |
| 04/16/1996 | US5507344 Methods of combating production problems in wells containing defective gravel packs |
| 04/16/1996 | US5507342 Method of selective treatment of open hole intervals in vertical and deviated wellbores |
| 04/16/1996 | US5507149 Nonporous liquid impermeable cryogenic barrier |
| 04/11/1996 | WO1996010683A1 A method for determining the reservoir properties of a solid carbonaceous subterranean formation |
| 04/10/1996 | EP0705242A1 Surfactant, process for its production and use |
| 04/10/1996 | CN2224278Y Coverless press-craking bombs connected by core tube |
| 04/10/1996 | CN2224277Y Water-filling nozzle for oil field |
| 04/10/1996 | CN2224276Y Pressure-defining air-pumping production-increasing device for oil-extracting of oil-extracting well |
| 04/10/1996 | CN1120317A Filter |
| 04/10/1996 | CN1120113A Breaking up of rock and the like |
| 04/09/1996 | US5505560 Fluid transfer system for an offshore moored floating unit |
| 04/09/1996 | US5505262 Fluid flow acceleration and pulsation generation apparatus |
| 04/09/1996 | US5505261 Firing head connected between a coiled tubing and a perforating gun adapted to move freely within a tubing string and actuated by fluid pressure in the coiled tubing |
| 04/09/1996 | US5505260 Method and apparatus for wellbore sand control |
| 04/09/1996 | US5505258 Parallel tubing system for pumping well fluids |