| 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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| 02/17/1988 | EP0255976A2 Formation fluid sampler |
| 02/17/1988 | CN87207936U Wedge cover for perforation bullet gunpowder |
| 02/16/1988 | US4725390 Mixing raw material, silicon carbide, and binder then firing |
| 02/16/1988 | US4724907 Method and device for blending surfactant mixtures for treatment of oil wells |
| 02/16/1988 | US4724905 Sequential hydraulic fracturing |
| 02/16/1988 | US4724672 Energy storing hydraulic lift pump for oil wells |
| 02/16/1988 | CA1232921A1 Particulate ceramic useful as a proppant |
| 02/16/1988 | CA1232751A1 Sintered, spherical, composite pellets prepared from clay as a major ingredient useful for oil and gas well proppants |
| 02/11/1988 | WO1988001010A1 Calcium-free clear high density fluids |
| 02/10/1988 | EP0255513A1 Method and apparatus for data transmission in a well using a flexible line with stiffener |
| 02/10/1988 | CN86105547A Stabilization of xanthan gum in aqueous solution |
| 02/09/1988 | US4724105 Annular shaped charge technique |
| 02/09/1988 | US4723604 Drainhole drilling |
| 02/09/1988 | CA1232439A2 Method of treating a fracturing liquid |
| 02/02/1988 | US4722397 Well completion process using a polymer gel |
| 02/02/1988 | US4722395 Viscous oil recovery method |
| 02/02/1988 | US4722392 Multiple position service seal unit with positive position indicating means |
| 02/02/1988 | CA1232374A1 Solid plug of radioactive tracer material |
| 02/02/1988 | CA1232196A1 Method for recovering mineral values from a subterranean formation through wellbores penetrating the formation from tunnels |
| 02/02/1988 | CA1232195A1 Method and means to pump a well |
| 02/02/1988 | CA1232145A1 Conductor guide system for offshore drilling platform |
| 02/02/1988 | CA1232127A1 Micellar slug for oil recovery |
| 02/02/1988 | CA1232126A1 Treating fines-containing earthen formations |
| 01/26/1988 | US4721565 Globs of oil from water separation, removal |
| 01/26/1988 | US4721436 Process and installation for circulating fluids by pumping |
| 01/26/1988 | US4721158 Fluid injection control system |
| 01/26/1988 | US4721132 Subsea flowline quick disconnect coupling |
| 01/26/1988 | US4720978 Solar-powered rankine cycle pumping engine |
| 01/20/1988 | EP0235268A4 Method and apparatus for reducing viscosity of high viscosity materials. |
| 01/20/1988 | EP0061494B1 Thermal enhancement |
| 01/19/1988 | US4720124 Telescoping joint |
| 01/19/1988 | US4719972 Treatment of steam feedwater with CO2 to reduce oil well reservoir gravel and sand dissolution during steam injection |
| 01/19/1988 | CA1231520A1 Heavy oil recovery process using cyclic co.sub.2- steam stimulation |
| 01/14/1988 | WO1988000278A1 Composition and method for slowly dissolving siliceous material |
| 01/14/1988 | WO1988000277A1 Method for startup of production in an oil well |
| 01/14/1988 | WO1988000276A1 Downhole electric heating generator for producing steam or hot water |
| 01/14/1988 | WO1988000273A1 Riser tensioner |
| 01/12/1988 | US4718824 Usable device, in particular for the pumping of an extremely viscous fluid and/or containing a sizeable proportion of gas, particularly for petrol production |
| 01/12/1988 | US4718728 Hydraulic couple rotational force hydraulic mining tool apparatus |
| 01/12/1988 | US4718493 For fracturing a subterranean earth formation |
| 01/12/1988 | US4718491 Injecting a polysaccharide dispersion |
| 01/12/1988 | US4718490 Creation of multiple sequential hydraulic fractures via hydraulic fracturing combined with controlled pulse fracturing |
| 01/12/1988 | US4718489 Pressure-up/blowdown combustion - a channelled reservoir recovery process |
| 01/12/1988 | US4718486 Portable jet pump system with pump lowered down hole and raised with coiled pipe and return line |
| 01/12/1988 | US4718485 Patterns having horizontal and vertical wells |
| 01/12/1988 | CA1231301A1 Method for producing heavy, viscous crude oil |
| 01/07/1988 | EP0251882A1 Device and method for positioning and connecting by remote control a curved connector |
| 01/07/1988 | EP0251881A1 Enhanced recovery method to continually produce a fluid contained in a geological formation |
| 01/07/1988 | EP0251872A1 Well head with flow control means for landfill gas recovery |
| 01/07/1988 | EP0251488A2 Flexible riser system and method for installing the same |
| 01/06/1988 | CN87104367A Extracting method of particular oil |
| 01/05/1988 | US4717594 Coating, resins, curing, multilayer |
| 01/05/1988 | US4717287 Apparatus for installing a flowline section near the seabed |
| 01/05/1988 | US4716970 Oil or gas well workover technique |
| 01/05/1988 | US4716967 High pressure combustion products generated; thermal igniter surrounded by fuel and oxidizer |
| 01/05/1988 | US4716961 Rotary drive apparatus for downhold pump |
| 01/05/1988 | US4716932 Continuous well stimulation fluid blending apparatus |
| 01/05/1988 | US4716833 Method of assembling a tanged charge holder |
| 01/05/1988 | US4716832 For use in a perforating gun assembly |
| 01/05/1988 | CA1231045A1 Carbon dioxide and hydrocarbon solvent flooding in a steeply dipping reservoir |
| 01/05/1988 | CA1230962A1 Sulfonate dimer surfactant cyclic steam stimulation process for recovering hydrocarbons from a subterranean formation |
| 12/31/1987 | CN87203794U Deep well oil pump with a sealing ring |
| 12/30/1987 | WO1987007925A1 Improvements relating to detonating heads |
| 12/29/1987 | US4716555 Sonic method for facilitating the fracturing of earthen formations in well bore holes |
| 12/29/1987 | US4715967 Composition and method for temporarily reducing permeability of subterranean formations |
| 12/29/1987 | US4715794 Bottom-hole pump fluid flow controller |
| 12/29/1987 | US4715444 Concurrent injection of gaseous stream and water |
| 12/29/1987 | US4715443 Baffle system for conducting well treating operations |
| 12/29/1987 | US4715441 Side pocket mandrel |
| 12/29/1987 | US4715128 Curvature probe and method |
| 12/29/1987 | CA1230823A1 Steam injection method with constant rate of heat |
| 12/23/1987 | EP0250107A2 Well bore measurement tool |
| 12/23/1987 | EP0250069A2 A deepwater floating drilling and production facility incorporating flexible production risers |
| 12/23/1987 | EP0249609A1 Process for increasing the degree of oil extraction. |
| 12/23/1987 | CN86102692A Compliant jacket for offshore drilling and production platform |
| 12/22/1987 | US4714376 Hillslope landslide stability drain |
| 12/22/1987 | US4714115 Hydraulic fracturing of a shallow subsurface formation |
| 12/22/1987 | US4714114 Use of a proppant with controlled pulse fracturing |
| 12/22/1987 | US4714112 Controlled addition of salt to steam to control ph |
| 12/22/1987 | CA1230543A1 Tubing conveyed perforating gun electrical detonator |
| 12/22/1987 | CA1230475A1 Method of improving steam flood conformance with steam foaming agents without a non-condensable gas |
| 12/15/1987 | US4713449 Glucuronic acid-free, glucose and mannose units in 2 to 1 ratio |
| 12/15/1987 | US4713203 Bauxite proppant |
| 12/15/1987 | US4712984 Process and apparatus for circulating fluids by pumping |
| 12/15/1987 | US4712616 Method for scale reduction in off-shore platforms |
| 12/15/1987 | US4712615 Liner hanger assembly with setting tool |
| 12/15/1987 | US4712614 Liner hanger assembly with combination setting tool |
| 12/15/1987 | CA1230311A1 In situ method for yielding a gas from a subsurface formation of hydrocarbon material |
| 12/15/1987 | CA1230220A1 Method of improving conformance in steam floods with steam foaming agents |
| 12/09/1987 | CN86204467U Oil sluicing device with hydraulic anchor |
| 12/08/1987 | US4712006 Steam quality measurement apparatus and method |
| 12/08/1987 | US4711306 Gas lift system |
| 12/08/1987 | US4711305 Multi-mode testing tool and method of testing |
| 12/08/1987 | US4711304 Method of and apparatus for injection of steam into multiple well zones |
| 12/08/1987 | US4711302 Gravel pack void space removal via high energy impulse |
| 12/08/1987 | CA1230050A1 Loop line with mobile coupling linking a header intake to a well-head outlet |
| 12/08/1987 | CA1229973A1 Enhanced oil recovery |
| 12/05/1987 | CN86209054U Anti-sand oil pump |
| 12/02/1987 | EP0247754A1 Apparatus and method for making particle-containing foams |
| 12/02/1987 | CN87202684U Internal combustion type oil pumping unit |