Patent ID: 6382321
Filing Date: 2002-05-07
Classification: E21B

Abstract:
A tool for dewatering a well, comprising:a first elongated, hollow tube having a first end, a second end, and a longitudinal axis, a second elongated hollow tube having a first end and a second end, being coaxial with and internal of the first tube, and including an interior in which fluid moves, a space formed between the first and second tubes through which gas moves in a first direction from the second end to the first end, a pump having a first end, a second end and a middle portion, and including a nozzle at the first end, an eductor at the middle portion and a diffuser at the second end, said pump being arranged at the first ends of the first and second tubes, said pump also including a central inlet for allowing fluid external of the tool to move into the central inlet and into the interior of the second tube along a second, opposite direction, said nozzle including a plurality of primary outlets extending from the space to the interior of the second tube for introducing gas moving in the space in the first direction into the fluid moving in the second direction, said eductor including a converging portion, said diffuser including a diverging portion, and a plurality of secondary outlets, located in the pump downstream of the plurality of primary,outlets, and extending from the space to the interior of the second tube, said plurality of secondary outlets introducing gas moving in the first direction into the fluid moving in the second direction in the interior of the second tube.