Wells – Processes – Producing the well
Patent
1988-04-08
1989-07-11
Massie, Jerome W.
Wells
Processes
Producing the well
166386, 166319, 166332, E21B 3406
Patent
active
048462802
ABSTRACT:
Means for lifting formation fluid to the surface in a drill stem test. The drill string has first openings allowing entry of formation fluid and upwardly spaced second openings which are normally closed by a sleeve slidably mounted on the drill string. Fluid pressure from within the drill string impinges on a transverse surface of the sleeve and forces it down, allowing treatment fluid to enter the drill string from the annulus between the drill string and the well bore. A jet pump comprised of a flow constriction creating a venturi effect causes treatment fluid to accelerate upwardly in the drill string, the circulation of the treatment fluid drawing the formation fluid to the surface. The second openings covered by the sleeve include the fluid crossover of the jet pump. A standing valve in the drill string between the first and second openings allows down hole shut-in and pressure build-up tests.
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Hummel Jack L.
Marathon Oil Company
Massie Jerome W.
Melius Terry Lee
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