Importance

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Abstract

A down hole jet pump for production of fluid from a well with the jet pump being powered from a pressure source at the surface and discharging production fluid through production tubing to the surface. The down hole jet pump of this invention is retrievable by reverse flow of fluid down the production tubing to move the jet pump upwardly through the power fluid tubing to the surface. The components of the jet pump are removable and adjustable in the field without the use of special tools thereby enabling the pump to be adjusted to provide optimum operating conditions for each installation and enable interchange and replacement of parts. The down hole jet pump includes passageways for the power fluid, the inlet of production fluid into the throat of the jet pump and for the mixed production fluid and power fluid which is discharged to the production tubing with these passageways being parallel but not concentric in relation to each other thereby enabling the use of larger passageways then if the passageways were concentric thereby providing larger internal clearances which are not as prone to blockage from scale formation, salt, asphalt, sand and similar materials that may be entrained in the production fluid. The lower end of the jet pump assembly may be provided with a structure to remove the ball check valve or foot valve from its seat to enable treating fluid to be pumped down into the formation for treatment of the well.

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First Claim