Handling: hand and hoist-line implements – Grapple – Well type
Patent
1996-01-17
1998-09-22
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
294 8617, 294 8633, E21B 3103
Patent
active
058104100
ABSTRACT:
A combined washover and retrieval device (30, 30A) for connection to the lower end of a tubular string (14, 14A) including an outer washover pipe (22, 22A) and an inner retrieval tool (36, 36A). Retrieval tool (36, 36A) includes an upper sub (30, 30A) secured at its upper end to a tubular support (23, 23A). In a preferred embodiment of FIG. 1-3, the sub (30) has a plurality of ports (35) to permit the upward flow of fluid with entrained soil and debris through the inner annulus (38) and ports (35) at the upper end of the annulus (38) to bypass the retrieval tool (36). Another embodiment illustrated in FIGS. 4-7 has a plurality of shear pins (31A) connecting the washover pipe (22A) to the sub (30A). Pins (31A) are sheared upon washover pipe (22A) abutting the packer (16A) under a predetermined weight from the tubing string (14A) to permit downward relative movement of retrieval tool (36A) for connection to the fish (18A).
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patent: 4696502 (1987-09-01), Desai
Arterbury Roy S.
Burroughs Thomas C.
Cherry Johnny D.
The Cavins Corporation
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