Handling: hand and hoist-line implements – Grapple – Well type
Patent
1980-08-26
1982-11-30
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
166181, 285401, 285404, 294 8624, 294 90, 403348, E21B 2300, E21B 3120
Patent
active
043613535
ABSTRACT:
The present invention relates to a method and apparatus for retrieving wear bushings of various diameters and configurations with a single retrieving tool. The apparatus comprises an elongated member having first and second ends and having a generally cylindrical outer peripheral portion arranged parallel with a longitudinal axis of the elongated member. A plurality of adjustable members are adapted for engagement with a wear bushing. The plurality of adjustable members is selectively variable in quantity dependent upon the configuration of the wear bushing. Each of the adjustable members is arranged at the cylindrical outer peripheral portion of the elongated member and extends outwardly an adjustable distance along an extension of a radius of the cylindrical portion. In a preferred embodiment, the adjustable members comprise bolts which are adjustably secured in tapped holes arranged in the cylindrical portion of the elongated member. In a further preferred embodiment, an annular ring having a cylindrical outer peripheral surface whose diameter is greater than the diameter of the cylindrical outer peripheral portion of the elongated member is fixedly secured between the ends of the elongated member. A further plurality of adjustable members, which plurality is variable in quantity, is arranged at the outer peripheral surface of the annular ring for engagement with a retrieving groove of a larger diameter wear bushing.
REFERENCES:
patent: 1505475 (1924-08-01), Lewis
patent: 1873621 (1932-08-01), Moore
patent: 2128430 (1938-08-01), Pryor
patent: 2245963 (1941-06-01), Crickmer
patent: 2421324 (1947-05-01), Graham
patent: 3072430 (1963-01-01), Fahrenwald
patent: 3350130 (1967-10-01), Ahlstone et al.
patent: 3392784 (1968-07-01), Brown
patent: 4050731 (1977-09-01), Coone et al.
patent: 4101070 (1978-07-01), Hoare et al.
Cherry Johnny D.
Sub-Surface Tools, Inc.
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