| EnCana Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20120085236 | TREATMENT OF WATER FOR USE IN HYDRAULIC FRACTURE STIMULATION - A process and process line for treating water containing hydrogen sulfide for use as a hydraulic fracturing fluid is provided, to practice the following steps: separating a gaseous portion containing hydrogen sulfide from the water to form a first degassed water product; introducing the first degassed water product into a mechanical gas stripping unit and treating the first degassed water product with a stripper gas; recovering from the mechanical gas stripping unit at least one overhead vapor stream containing hydrogen sulfide and a stripped water stream as a bottom stream; degassing the stripped water stream in a degassing tank to produce a second degassed water product; and treating the second degassed water product with a hydrogen sulfide scavenger to produce a sweet water product having substantially reduced hydrogen sulfide. | 04-12-2012 |
| 20110272365 | REMOVAL OF HYDROGEN SULFIDE FROM WATER - A method of removing hydrogen sulfide from water is provided, comprising providing water containing a first amount of hydrogen sulfide and having a first pH; adding a stripper gas to the water to form a mixture; agitating the mixture; and separating a gaseous portion from the mixture to form a water product, the water product containing a second amount of hydrogen sulfide that is less than the first amount of hydrogen sulfide. | 11-10-2011 |
| 20100051267 | Gas flow system - A gas flow system for removing a liquid from a well bore and allowing for gas production is provided. The gas flow system comprises a casing in the well bore for allowing flow of the liquid and gas; a tubing string in the casing for allowing flow of the liquid and gas; pressure measurement devices for use in determining a rate of liquid influx into the well bore; a casing control valve moveable between various positions ranging from fully open to fully closed for controlling flow through the casing; a tubing control valve moveable between various positions ranging from fully open to fully closed for controlling flow through the tubing; and flow measurement devices for determining the rate of flow through the tubing and the total rate of flow. The system is switchable between a current production phase and an alternate production phase based on the determined rate of liquid influx, a tubing critical velocity and a gas flow rate through the tubing, wherein switching from a current production phase to an alternate production phase results in the either or both of a decrease in liquid build-up in the well bore and an increase in gas production rate and wherein the current production phase differs from the alternate production phase. | 03-04-2010 |
| 20090130732 | CONVERSION OF HEAVY OIL AND BITUMEN TO METHANE BY CHEMICAL OXIDATION AND BIOCONVERSION - A process for the conversion of heavy oil or bitumen to methane by chemical oxidation and bioconversion. | 05-21-2009 |
| 20090014174 | Use of coated slots for control of sand or other solids in wells completed for production of fluids - The present invention relates to an approach to reducing or eliminating the plugging of slots in a slotted liner while otherwise allowing the liner to function in its normal capacity as a solids exclusion device which permits the reservoir fluids to flow through relatively freely. The approach taught by the present invention involves coating the surface of the slot with a suitable material. The coating at least partially covers the irregularities that are formed on the slot surfaces as a consequence of the slot manufacturing process. The presence of the coating results in a markedly reduced slot plugging problem while still enabling the slot to perform its main function in excluding or inhibiting the inflow of larger particles and allowing the inflow of fluids. | 01-15-2009 |
