Wells – With below and above ground modification – Eduction pump or plunger in well
Patent
1987-05-21
1989-02-28
Novosad, Stephen J.
Wells
With below and above ground modification
Eduction pump or plunger in well
166 72, 166105, 166332, 251291, 417434, 417435, E21B 3414
Patent
active
048076996
ABSTRACT:
A tube shaped sleeve apparatus which includes two cylindrical components adapted to be connected to each other and sections of tubing string by cooperating threads formed at the ends thereof. At spaced intervals in the periphery of the sleeve are a plurality of radial holes or ports and formed in the sleeve bore at opposite ends thereof are stops shoulders. Adapted to be inserted in slidable relation inside the bore of the tubing sleeve is a mandrel which includes a plurality of resilient O-rings or gaskets that are secured in the periphery of the mandrel inside annular grooves formed therein. Formed in the bore of the mandrel and at opposite ends thereof are a second set of stop shoulders. When positioned opposite the holes in the sleeve, the periphery of the mandrel and the gaskets form a tight seal with the wall of the sleeve bore to prevent fluids and gases from the well bore from entering and escaping the tubing sleeve. Through the use of a sleeve operator, which is adapted to be attached to the bottom of a sub-surface rod pump, the mandrel inside the sleeve bore can be directed to shift longitudinally in the bore into a position either opposite or away from the holes to respectively close or open the holes, as desired.
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Kisliuk Bruce
Merkey Randy
Novosad Stephen J.
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