Oil well pump with plunger pull down and desanding assembly
Patent
·
OSTI ID:7293698
A pump of the reciprocating plunger type for an oil well is designed in which structure is provided for pulling downwardly on the pump plunger during its downward stroke rather than relying upon the pump rod or sucker rod to push the plunger downwardly, thereby reducing wear and damage. One embodiment involves a tension member connected with the walking beam and extending downwardly below the plunger, around a roller assembly or the like and then back upwardly for connection with the bottom of the plunger so that as the walking beam moves downwardly to move the pump plunger downwardly, the tension member will be tensioned for pulling the plunger downwardly without applying compressive force to the pump rod or sucker rod. Another embodiment provides a weight attached to the bottom of the plunger with the weight being reciprocal in a closed chamber so that it is not in contact with the fluid being pumped. The pump barrel is provided with a desander between the plunger and the standing valve and is in the form of a rod projecting upwardly in the pump barrel for extending into the lower hollow end of the pump plunger for removing sand therefrom to prevent sand from filling or clogging the lower end of the plunger. 6 claims, 17 drawing figures.
- Assignee:
- TIC; ERA-03-007940; EDB-78-007171
- Patent Number(s):
- US 4049365
- OSTI ID:
- 7293698
- Country of Publication:
- United States
- Language:
- English
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