Attachment for sucker rod depth adjustment
This patent describes a surface unit of an oil well pumping system, having a walking beam, a suspended carrier bar and an interconnected sucker rod assembly for stroking a reciprocating down-hole pump. It comprises a cross bar having a centrally located passage therein for the sucker rod assembly and adapted to be transversely supported by the carrier bar; a depth adjusting bar, having a centrally located passage therein for the sucker rod assembly, positioned at a selected fixed dimension above and parallel to the cross bar and adapted to operatively support the sucker rod assembly; clamping means for fixing the sucker rod relative to the depth adjusting bar; and hydraulically extendable means supportively connecting the depth adjusting bar to the cross bar on at least each side of the carrier bar for adjusting the selected fixed dimension and maintaining the adjustment during operation.
- Assignee:
- NOV; NOV-92-030080; EDB-92-114666
- Patent Number(s):
- A; US 5101676
- Application Number:
- PPN: US 7-680521
- OSTI ID:
- 5125043
- Country of Publication:
- United States
- Language:
- English
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