Abstract: Higher volumetric hydrocarbon exposed original or restored by miscible gas injection, solution gas saturated oil is recovered through enlarged expandable liner, sand screened wellbores by controlled wellbore to formation pressure maintained above recovering oils critical bubble point. Exclusively hydrocarbon formation liquids are differential pressure forced through centralizer held larger outer diameter liquid displacer into the production tubing, while maintaining gas volume, pressure, and solution gas saturation in the formation, for higher volume flow for total in place oil recovery. Injected downstructure waterdrive pressure (WDP) into oil or gas formations augments oil and/or gas production and recovery.

Abstract: Higher volumetric hydrocarbon exposed original or restored by miscible gas injection, solution gas saturated oil is recovered through enlarged expandable liner, sand screened wellbores by controlled wellbore to formation pressure maintained above recovering oils critical bubble point. Exclusively hydrocarbon formation liquids are differential pressure forced through invention's centralizer held larger O.D. Liquid Displacer into the production tubing, while maintaining gas volume, pressure, and solution gas saturation in the formation, for higher volume flow for total in place oil recovery. Injected downstructure waterdrive pressure WDP into oil or gas formations augments oil and/or gas production and recovery. Complete gas well De-liquefying is attained by flowing gas recovery through enlarged expandable liner and sand screened wellbores and up the wellbore annulus dry, while producing all liquids separately through the centralized larger O.D.

Abstract: In distinct embodiments, miscible gas is injected directly into crude oil within its formation, entering into solution within it at optimum pressures, adding desired solution gas saturation, increasing its mobility and fluidity. This mobile solution gas saturated oil is produced by controlled wellbore to formation pressures maintained above its critical bubble point pressure, from same injection wells converted into oil recovery wells, where liquids only are differential pressure injected through invention's improved Liquid Injector DOLI, into the production tubing, while maintaining gas volume, pressure, and solution gas saturation in the formation, for total in place oil recovery. Injected down structure water drive pressure WDP into crude oil or gas formations augments recovery.

Abstract: This invention provides a method to efficiently remove liquids—hydrocarbons or water—from a natural producing formation so as to reduce the resistance to gas inflow to the wellbore from the formation. The system will also serve as an efficient mechanism for producing hydrocarbon liquids by operating at a higher wellbore and near-wellbore formation pressure to maintain such liquids in a state of increased mobility due to the retained gas in solution. The system used is a downhole device containing a float-operated valve, said float being sensitive to fluid filling its interior such that it falls with liquid fill, opening a valve to the production tubing string liquids are allowed into the production tubing, while gas is produced up the tubing-casing annulus. A unique combination of artificial lift is incorporated in the tubing string, basically a plunger lift operated by one or more gas lift valves that open when a prescribed column of liquid is sensed above the valve.

Abstract: A downhole injector (10), (26), (38) and (54) is provided at the lower end of the production tubing string (TS) for passing liquids from a downhole hydrocarbon formation (F) into the tubing string while preventing gases from passing through the injector. The present invention uses the injector with an optimum wellbore annulus (A) back pressure using a regulator (64) and a pressure gauge (62) to enhance total gaseous and liquid hydrocarbon recovery. In wells requiring artificial lift, a downhole pump (P) may be used to efficiently pump formation fluids to the surface or alternatively one or more gas lift valves (LV) for raising slugs of liquid to the surface. The present invention may also be used with multi horizontal borehole technology for increasing hydrocarbon recovery by retaining gases in the formation to act upon liquid hydrocarbons by maintaining an over head pressure for driving the liquids from the formation through the injector for maximum ultimate recovery and hydrocarbon reserve value.

Abstract: The invention provides for injecting of high-pressure miscible natural gas directly into a newly opened or previously produced liquid hydrocarbon reservoir to saturate liquid hydrocarbons to improve their mobility to flow toward and into producing wells. Concurrent injection of gas, miscible or otherwise, into the hydrocarbon zone's gas cap supplies additional pressuring effects to aid the resaturation process. Downhole float operated injectors are improved to operate at high pressures maintained within the wellbore to assure liquid hydrocarbon flow completely out of the formation. The improved injector system then senses the difference between liquid and gas and closes its valve to retain the gas within the wellbore. Rejected gas is redirected into the reservoir's gas cap for its continued benefits.