Counterbalanced pumps
This patent describes a counterbalanced pump conformed for reciprocating a rod string disposed in a well, comprising: a frame adapted for vertical placement adjacent the well, the frame including an upper end and a base for support thereof on ground; roller means mounted for rotation on the upper end of the frame; a first flexible belt assembly connected at one end thereof to the roller means and wrapped thereabout in a first direction for attachment as the other end thereof to the rod string; a second flexible belt assembly connected at one end thereof to the roller means and wrapped thereabout in a second direction, whereby the rotation of the roller means will cause an opposite effect on the extension of the first and second belts; counterweight means connected to the other end of the second belt assembly; a first and second rotary guide means mounted for rotation on the frame in spaced, coplanar, deployment relative each other; a continuous flexible loop disposed around the common exterior of the first and second guide means; a prime mover connected for rotary advancement of the first guide means; and a connecting rod operatively engaged at one end thereof to a segment on the continuous loop and at the other end to the counterweight means for imparting a reciprocal force to the counterweight means in the course of rotary advancement of the loop.
- Assignee:
- NOV; NOV-87-053341; EDB-87-078525
- Patent Number(s):
- US 4651582
- OSTI ID:
- 6677658
- Resource Relation:
- Patent File Date: Filed date 27 Jan 1986
- Country of Publication:
- United States
- Language:
- English
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