Well pumping unit
Patent
·
OSTI ID:5821055
This patent describes a rear mounted geometry pumping unit for reciprocation of a well string, and pumping unit including a walking beam, an arc attached to one end of the walking beam, the arc being adapted for connection to the well string, means for oscillation of the walking beam connected to an opposite end of the walking beam from the end on which the arc is attached, means for rotatably supporting the walking beam on a horizontal axis at a location intermediate between the opposed ends thereof. The oscillation means include at least one pitman rotatably connected at one end thereof to the opposite end of the walking beam, a crank arm rotatably connected to the pitman at the other end thereof, a motor driven spindle for rotating the crank arm in circular fashion, a counterweight attached to the crank arm for rotation in circular fashion therewith, the center of gravity of the counterweight lying in a straight line direction along the axis of the crank arm. The axis of the rotatable connection between the crank arm and the the pitman intersects the straight line direction at a right angle, the pumping unit having a distance A extending from the axis B of the rotatable support for the walking beam to a point of tangency on the outer surface of the arc which lies in the direction of the well string, a distance C extending from B to the axis D of the rotatable connection of the pitman to the walkin gbeam, a distance P extending from D to the axis E of the rotatable connection of the pitman to the crank arm, a distance R from E to the axis F of the motor driven spindle, a distance I extending from F in a horizontal direction to a point L at the intersection of a vertical direction with the axis of the rotatable support for the walking beam, a distance G from F to the ground, a distance H-G from B to L, and a distance K from F to B.
- Assignee:
- USX Corp., Pittsburgh, PA
- Patent Number(s):
- US 4703665
- OSTI ID:
- 5821055
- Country of Publication:
- United States
- Language:
- English
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