| 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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| 07/21/1992 | US5131472 Overbalance perforating and stimulation method for wells |
| 07/21/1992 | US5131471 Single well injection and production system |
| 07/21/1992 | US5131465 Perforating apparatus for circulating cement |
| 07/21/1992 | CA1305407C Method and apparatus for manipulating a well bore liner |
| 07/21/1992 | CA1305406C Method and system to proportion assisting fluids in a well |
| 07/15/1992 | EP0494497A1 Method and apparatus for production of subsea hydrocarbon formations |
| 07/15/1992 | CN2110081U Column pin donkey head |
| 07/15/1992 | CN2110080U Changable stroke scissors beam-pumping machine |
| 07/15/1992 | CN1017464B Method and apparatus for utilizing oil well energy |
| 07/14/1992 | US5129458 Treating an underground formation |
| 07/14/1992 | US5129457 Injecting foam |
| 07/14/1992 | CA1305047C Water-alternating-gas flooding of a hydrocarbon-bearing formation (870038 can 000) |
| 07/14/1992 | CA1305046C Steam drive/oil recovery process involving horizontal boreholes |
| 07/09/1992 | WO1992011441A1 pH TOLERANT HETEROPOLYSACCHARIDE GELS FOR USE IN PROFILE CONTROL |
| 07/09/1992 | WO1992011440A1 Method for selectively reducing subterranean water permeability |
| 07/09/1992 | WO1992008875A3 Well completion system |
| 07/09/1992 | CA2098829A1 Method for selectively reducing subterranean water permeability |
| 07/08/1992 | CN2109441U Series connection pneumatic oil pumping machine |
| 07/08/1992 | CN2109440U Pulley double action type long-stroke oil pumping machine |
| 07/08/1992 | CN2109439U Deadweight balance oil pumping machine attached crank rocker |
| 07/08/1992 | CN2109438U Mechanical valve oil pump |
| 07/08/1992 | CN1062583A Low-speed drive system with stepless speed regulation for beam oil-pumping unit |
| 07/07/1992 | US5128052 Displacement pump, venturi, flow controller |
| 07/07/1992 | US5128049 Scavenging |
| 07/07/1992 | US5128046 Chelation, coagulation, water pollution control |
| 07/07/1992 | US5127803 Pump tool |
| 07/07/1992 | US5127710 Method of borehole hydraulicking of soluble minerals |
| 07/07/1992 | US5127474 Method and means for stabilizing gravel packs |
| 07/07/1992 | US5127457 Method and well system for producing hydrocarbons |
| 07/07/1992 | US5127231 Corrosion resistance, nonhydrating |
| 07/07/1992 | CA1304735C Modular drilling template for drilling subsea wells |
| 07/07/1992 | CA1304676C Process for selective placement of polymer gels for profile control in thermal recovery |
| 07/07/1992 | CA1304675C Enhanced oil recovery process |
| 07/07/1992 | CA1304673C Method of forming a plurality of spaced substantially parallel fractures from a deviated well bore |
| 07/07/1992 | CA1304588C Method of installing a template on the seafloor |
| 07/01/1992 | EP0492996A1 Method and apparatus for perforating a well |
| 07/01/1992 | CN2108794U Anti-sulfur restriction choke |
| 07/01/1992 | CN2108793U Planet repeatedly moving type long-stroke oil pump |
| 06/30/1992 | US5126418 Alkenylaminomethylenephosphonic acids and copolymers thereof with unsaturated carboxylic acids |
| 06/30/1992 | US5125801 Pumping system |
| 06/30/1992 | US5125456 Inorganic crosslinking agent and a cationic polymer containing acrylamide |
| 06/30/1992 | CA1304287C Steaming process, involving a pair of horizontal wells, for use in heavy oil reservoir |
| 06/30/1992 | CA1304286C System for recovery of petroleum from petroleum impregnated media |
| 06/30/1992 | CA1304284C Matched particle/liquid density well packing technique |
| 06/25/1992 | WO1992010640A1 Encapsulations for treating subterranian formations and methods for the use thereof |
| 06/25/1992 | WO1992010639A1 Method and means for stabilizing gravel packs |
| 06/24/1992 | EP0491391A1 Water treatment agent |
| 06/24/1992 | EP0429512A4 Safety switch for explosive well tools |
| 06/24/1992 | CN1062187A Anti-corrosion, anti-sand filter device for oil and gas well |
| 06/23/1992 | US5123492 Method and apparatus for inspecting subsurface environments |
| 06/23/1992 | US5123488 Method for improved displacement efficiency in horizontal wells during enhanced oil recovery |
| 06/23/1992 | US5123486 Polysilylenesiloxane polymers useful in enhanced oil recovery using carbon dioxide flooding |
| 06/23/1992 | US5123485 Method of flowing viscous hydrocarbons in a single well injection/production system |
| 06/23/1992 | US5123356 Transfer apparatus adapted for transferring an explosive train through an externally pressurized secondary explosive bulkhead |
| 06/23/1992 | CA1304163C Steam injection profiling |
| 06/23/1992 | CA1303976C Method for installing a liner within a well bore |
| 06/23/1992 | CA1303974C Method of producing viscous oil from subterranean formations |
| 06/23/1992 | CA1303973C Enhanced oil recovery using a three-stage injection of solvent and water |
| 06/23/1992 | CA1303972C Limited entry, multiple fracturing from deviated wellbores |
| 06/23/1992 | CA1303971C Perforating gun firing tool |
| 06/23/1992 | CA1303970C Method and apparatus for perforating well bores using differential pressure |
| 06/23/1992 | CA1303969C Automatic drop-off device for perforating guns |
| 06/23/1992 | CA1303968C Through bulkhead explosive initiator for oil well usage |
| 06/23/1992 | CA1303841C Reducing permeability of highly permeable zones in subterranean formations |
| 06/22/1992 | CA2052006A1 Alkoxylated surfactant system for heavy oil reservoirs |
| 06/17/1992 | EP0490421A1 Downhole measurements using very short fractures |
| 06/17/1992 | EP0489816A1 Well casing flotation device and method |
| 06/17/1992 | CN2107529U Under well liquid solid phase separator |
| 06/17/1992 | CN2107528U Throwing device for explosion hole blocking ball |
| 06/17/1992 | CN2107527U Numerical control chain wheel petroleum sucker |
| 06/17/1992 | CN2107526U Straight-line sucker |
| 06/17/1992 | CN2107525U Belt wheel for sucker motor |
| 06/17/1992 | CN2107524U Mechanical balance chain oil sucker |
| 06/16/1992 | US5121796 Oil well spill trough |
| 06/16/1992 | CA1303454C Organophilic clay suspension medium |
| 06/15/1992 | CA2045973A1 Selective permeability reduction in a subterranean hydrocarbon-bearing formation using a nonselective gel |
| 06/14/1992 | CA2056295A1 Safety booster for explosive systems |
| 06/11/1992 | WO1992009806A1 Well pump system |
| 06/10/1992 | EP0489705A2 Method and device for injecting gases containing oxygen |
| 06/10/1992 | CN2106888U A-frame beam-pumping unit |
| 06/09/1992 | US5120935 Method and apparatus for oil well stimulation utilizing electrically heated solvents |
| 06/09/1992 | US5120455 Hydraulic fracturing propping agent |
| 06/09/1992 | US5120160 Method and apparatus for confining and reclaiming hydrocarbon contaminated land sites |
| 06/09/1992 | CA1302872C Production of hydrogen sulphide-containing gas from an underground formation |
| 06/09/1992 | CA1302871C Wire line hold down device |
| 06/09/1992 | CA1302870C Method for treating subterranean formations |
| 06/04/1992 | DE4037899A1 Cleaning device for well shaft - includes perforated or slotted well tube with sealed treatment chamber and pressure pump |
| 06/04/1992 | CA2056885A1 Sand control agent and process |
| 06/04/1992 | CA2056856A1 Steam injection profile control agent and process |
| 06/04/1992 | CA2056855A1 Consolidation agent and method |
| 06/03/1992 | EP0488838A1 Device for agitating and holding particles in suspension in a polyphasic flow |
| 06/03/1992 | EP0488519A1 Downhole perforating tool |
| 06/03/1992 | EP0332645B1 Method and apparatus for reduction of the pressure in a liquid mixture |
| 06/03/1992 | CN2106221U Self-walking oil pump |
| 06/03/1992 | CN1061639A Oscillating long stroke oil pumper |
| 06/02/1992 | US5118629 Vapor extraction technique |
| 06/02/1992 | US5117915 Well casing flotation device and method |
| 06/02/1992 | US5117914 Method and apparatus for production of subsea hydrocarbon formations |
| 06/02/1992 | US5117913 Chemical injection system for downhole treating |
| 06/02/1992 | US5117912 Method of positioning tubing within a horizontal well |