| 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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| 07/12/1995 | CN2203354Y Well electric heater |
| 07/12/1995 | CN1105096A Hot producing device for thick oil well |
| 07/11/1995 | US5432709 Computer control system for portable self-contained ground water testing assembly |
| 07/11/1995 | US5431483 Submarine solution mining containment and regulation cover and method |
| 07/11/1995 | US5431482 Horizontal natural gas storage caverns and methods for producing same |
| 07/11/1995 | US5431230 Slant wellbore tubing anchor catcher with rotating mandrel |
| 07/11/1995 | US5431228 Downhole gas-liquid separator for wells |
| 07/11/1995 | US5431225 Sand control well completion methods for poorly consolidated formations |
| 07/11/1995 | US5431224 In situ combustion |
| 07/11/1995 | US5431222 Apparatus for production of crude oil |
| 07/06/1995 | DE4400180A1 In situ recovery and use of ground contaminants e.g. hydrocarbon fuels |
| 07/05/1995 | CN2202798Y Sand-proof seal opener |
| 07/05/1995 | CN1104552A Well screen having a slurry flow path |
| 07/05/1995 | CN1029240C Treating process for raising filterability of fermentation liquor contg. polysaccharose used as assistant recovery petroleum |
| 07/04/1995 | US5429192 Method and apparatus for anchoring a perforating gun to a casing in a wellbore including a primary and a secondary anchor release mechanism |
| 07/04/1995 | US5429191 High-pressure well fracturing method using expansible fluid |
| 07/04/1995 | CA1336128C Viscosity control additives for foaming mixtures |
| 06/29/1995 | WO1995017580A1 Assembly and process for drilling and completing multiple wells |
| 06/29/1995 | WO1995017244A1 Solvent soaps and methods employing same |
| 06/29/1995 | CA2179720A1 Solvent soaps and methods employing same |
| 06/28/1995 | EP0659975A2 Well screen having a uniform outer diameter |
| 06/28/1995 | EP0659207A1 Detergent mixtures |
| 06/28/1995 | EP0465543B1 Method and apparatus for monitoring well fluid parameters |
| 06/28/1995 | CN2202181Y Pulsating water-pressure generating valve for use in oil field water-filling well |
| 06/28/1995 | CN1104291A Electrolytic oil-extraction method |
| 06/28/1995 | CN1104290A Oil pit well-making method |
| 06/27/1995 | US5427504 Gas operated plunger for lifting well fluids |
| 06/27/1995 | US5427178 Tubing rotator and hanger |
| 06/27/1995 | US5427133 Coiled tubing wireline retrievable and selective set gas lift assembly |
| 06/21/1995 | CN2201483Y High pressure, thermal insulating, fire resistant spraying hose |
| 06/20/1995 | US5426258 Process for reducing the agglomeration tendency of hydrates in the production effluent |
| 06/20/1995 | US5425994 Petroleum well completion |
| 06/20/1995 | US5425598 System for sparging ground water contaminants |
| 06/20/1995 | US5425559 Radially deformable pipe |
| 06/20/1995 | US5425429 Method and apparatus for forming lateral boreholes |
| 06/20/1995 | US5425424 Casing valve |
| 06/20/1995 | US5425423 Well completion tool and process |
| 06/20/1995 | US5425422 Injecting deasphalted oil into well, soaking to solubilize deposits, resuming oil production |
| 06/20/1995 | US5425421 Method for sealing unwanted fractures in fluid-producing earth formations |
| 06/20/1995 | US5425420 Spoolable coiled tubing completion system |
| 06/20/1995 | US5425416 Formation injection tool for down-bore in-situ disposal of undesired fluids |
| 06/17/1995 | CA2138356A1 Pumping system comprising a high-capacity positive displacement pump |
| 06/15/1995 | WO1995016103A1 Cellulose injection system and method |
| 06/15/1995 | CA2177809A1 Cellulose injection system and method |
| 06/14/1995 | EP0657619A1 Process for extracting hydrocarbons from subterranean formations |
| 06/14/1995 | EP0657618A1 Fluid loss control additives |
| 06/14/1995 | EP0656973A1 Method and apparatus for in-situ treatment of landfill waste and contaminated soil |
| 06/14/1995 | CN1103700A 纤维素注入系统 Cellulose injection system |
| 06/14/1995 | CN1103699A Balance method of beam-pumping unit by applying force to wrist pin |
| 06/13/1995 | US5423383 Spoolable flexible hydraulic controlled coiled tubing safety valve |
| 06/13/1995 | US5423382 Apparatus for releasing perforating gun equipment from a well casing |
| 06/13/1995 | US5423205 For determining the amount of proppant in a flowing fracturing fluid |
| 06/13/1995 | CA2096118C Enhanced liquid hydrocarbon recovery process |
| 06/13/1995 | CA1335877C Apparatus and method for testing a well |
| 06/08/1995 | WO1995015466A1 Thermal extraction system and method |
| 06/08/1995 | WO1995015428A1 Method for developing an offshore hydrocarbon reservoir and an underwater station for use in exploring an offshore hydrocarbon reservoir |
| 06/08/1995 | CA2110887A1 Method and apparatus for densification of sands or silts |
| 06/07/1995 | EP0656460A2 Method and device for monitoring subsurface reservoirs |
| 06/07/1995 | EP0656459A1 Method for treating oil wells |
| 06/07/1995 | CN2200050Y Device for heating petroleum by working frequency electromagnetism |
| 06/07/1995 | CN2200049Y Packer in borehole |
| 06/07/1995 | CN2200048Y Flushing heat recovery packer |
| 06/06/1995 | US5422183 Composite and reinforced coatings on proppants and particles |
| 06/06/1995 | US5422098 Dentifrice inhibiting dental plaque |
| 06/06/1995 | US5421780 Joint assembly permitting limited transverse component displacement |
| 06/06/1995 | US5421676 Tension leg platform and method of instalation therefor |
| 06/06/1995 | US5421418 Flocculating zinc charge debris |
| 06/06/1995 | US5421414 Siphon string assembly compatible for use with subsurface safety devices within a wellbore |
| 06/06/1995 | US5421412 Injecting under pressure a fracturing fluid comprising a polysaccharide and an enzyme breaker which degrades the polysaccharide, releasing pressure |
| 06/06/1995 | US5421410 Plugging of underground strata to eliminate gas and water coning during oil production |
| 06/06/1995 | US5421408 Simultaneous water and gas injection into earth formations |
| 06/06/1995 | US5421357 Process for optimizing a device for regulating and damping a multiphase flow and device obtained with the process |
| 06/06/1995 | US5421241 Gas lift bellows construction and process for manufacture thereof |
| 06/06/1995 | CA2105686C Method of supplying gas to gas consumers |
| 06/03/1995 | CA2136694A1 Well screen having a uniform outer diameter |
| 06/01/1995 | WO1995014844A1 Well tool |
| 05/31/1995 | EP0518924B1 Dentifrice inhibiting dental plaque |
| 05/31/1995 | CN2199308Y Counterweight for crank pumping unit |
| 05/31/1995 | CN2199306Y Suspended thermal extracting device for well head with spinning oil pipe |
| 05/31/1995 | CN1103131A Relieving tapping method of oil layer by heat of chemical formation |
| 05/31/1995 | CN1028608C Numerical controlling three-phase seperator for oil, gas and water |
| 05/30/1995 | US5420402 Methods and apparatus to confine earth currents for recovery of subsurface volatiles and semi-volatiles |
| 05/30/1995 | US5420174 Method of producing coated proppants compatible with oxidizing gel breakers |
| 05/30/1995 | US5419400 Environmental vat |
| 05/30/1995 | US5419398 Drive system for turning a swivel |
| 05/30/1995 | US5419396 Cavitation, injecting desorbing fluids |
| 05/30/1995 | US5419394 Tools for delivering fluid to spaced levels in a wellbore |
| 05/30/1995 | US5419371 Throttle device, especially for a throttle valve, with throttle cage of ceramic and metal layers |
| 05/30/1995 | CA2047653C In-situ heated annulus refining process |
| 05/30/1995 | CA2043693C Method of steam injection profiling with unstable radioactive isotopes |
| 05/26/1995 | WO1995014154A1 Method for hydraulically fracturing spaced formation zones |
| 05/24/1995 | CN2198447Y Anti-drop device for screw rod pump oil production system |
| 05/24/1995 | CN2198385Y Super low frequency controllable focus device |
| 05/23/1995 | US5418217 Composition for selectively reducing subterranean formation permeability |
| 05/23/1995 | US5417288 Hydraulic set liner hanger and method |
| 05/23/1995 | US5417286 Method for enhancing the recovery of methane from a solid carbonaceous subterranean formation |
| 05/23/1995 | US5417284 Method for fracturing and propping a formation |
| 05/23/1995 | US5417283 Mixed well steam drive drainage process |
| 05/23/1995 | US5417282 Use of lightning for extraction of hydrocarbon fuels |
| 05/23/1995 | US5417281 Reverse Moineau motor and pump assembly for producing fluids from a well |