Patent ID: 7278488

Claim:
A method of foam emulsion well cleanout for gas well, comprising the steps of: providing an emulsifier apparatus having a compressed air inlet, a foaming solution inlet and a foam outlet; connecting the compressed air inlet to a source of compressed air capable of supplying compressed air to the emulsifier apparatus within a range of selected pressures; connecting the foaming solution to a source of foaming solution capable of supplying foaming solution to the emulsifier apparatus within a range of selected pressures; connecting the foam outlet to a discharge conduit supplying foam to a gas well; initiating the production of foam out of the foam outlet of the emulsifier apparatus by supplying compressed air to the emulsifier apparatus through the compressed air inlet at a rate of approximately 300 to 400 c.f.m. and at pressures within a range of 175 p.s.i and 375 p.s.i. and supplying foaming solution to the emulsifier apparatus through the foaming solution inlet at a rate of approximately 10 to 15 liters per minute and at pressures sufficient to overcome internal pressure within the emulsifier apparatus caused by the inflow of compressed air through the compressed air inlet; increasing the pressure of compressed air supplied to the emulsifier apparatus through the compressed air inlet with a corresponding increase in the pressure of foaming solution supplied to the foaming solution inlet until sufficient pressure is generated to force foam exiting the foam outlet along the discharge conduit and down the gas well with an average density of approximately 1 KPA per meter, while monitoring gas well pressure and varying compressed air pressure and foam density to ensure that pressure is always maintained at less than 80% of well pressure.