Oil well sucker rod safety block

Details Oil well sucker rod safety block Oil well sucker rod safety block

1982-08-02

1984-11-20

Schultz, William H.

Handling: hand and hoist-line implements

Grapple

Collar-engaging

248 49, 138106, 166 775, 166 85, B66C 100

Patent

active

044835647

ABSTRACT:
A fail-safe knock-off block for use during the repair or servicing of oil well surface pumping equipment involving a longitudinally slotted pipe capped at each end by top and bottom pipe segments which are held in place concentric to the slotted pipe by a resilient handle. An inner handle on the slotted pipe allows the concentric caps to be rotated axially from an open position to a closed position, thus encircling the polish rod. The weight of the sucker rod string on the end caps during use compresses the end caps and resilient handle thus locking the safety block such that it can neither open nor come off the well head.

REFERENCES:
patent: 1196647 (1916-08-01), Bergsten
patent: 1434673 (1922-11-01), Bergsten
patent: 1436621 (1922-11-01), Coultas
patent: 1564977 (1925-12-01), Schlinger
patent: 1581270 (1926-04-01), Knisley
patent: 1766920 (1930-06-01), Moody
patent: 2009942 (1933-07-01), Moody
patent: 2300370 (1942-10-01), Lowery
patent: 2397516 (1946-04-01), Stewart
patent: 3048358 (1962-08-01), Raulins
patent: 3682023 (1972-08-01), Greene, Jr.
patent: 3877740 (1975-04-01), Carvell

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