Patent ID: 7866381

Claim:
A fluid lifting system for lifting fluids from an oil field well, the oil field well having a wellhead assembly, a bailer device disposed inside a well casing and connected to a pulling cable attached to the bailer device, said pulling cable extending up to a drum which forms part of the level driving mechanism of the fluid lifting system, wherein the fluid lifting system extends inside the well casing and wherein the fluid lifting system comprises: a movable fluid collecting hose to collect the fluid, the fluid collecting hose having an open upper end and a closed lower end; a movable fluid suction tube having an upper section having a length and a lower section, wherein the fluid suction tube extends inside said fluid collecting hose, wherein the upper section of the fluid suction tube projects beyond the open upper end of the fluid collecting hose in which a discharge opening is formed for discharging the fluid to be suctioned by a suction pump connected to the wellhead above the ground, wherein the suction pump includes an outlet; an upper and a lower sealing ring positioned inside the wellhead defining a sealed chamber to which the fluid suction pump is connected; a device to lower gas pressure within the well casing, wherein the device comprises a storage tank having an inlet connected to the outlet of the suction pump, a first outlet connected to a screw pump, and a second outlet connected to a fluid transportation line; wherein the screw pump includes an outlet connected to an auxiliary inlet of the suction pump; wherein the end of said upper section of the suction tube is attached to the end of the pulling cable which drives the fluid collecting hose together with the fluid suction tube up and down; and wherein when the lifting assembly is pulled up in the well head, the discharge opening is placed between the upper ring and the lower ring and then the device suctions at least one of the fluid or the gas pressure from inside the collecting hose.