Retrieval tool

摘要

A tool for retrieving material from a well. The tool has a cylindrical tool body, malleable members, and a cylindrical jacket. The tool body defines a chamber adapted to receive material for retrieval. The malleable members are on the lower end of the tool body and preferably are made of a relatively hard, tough malleable material such as steel. They are bendable from an open position allowing material to enter the chamber to a closed position capturing the material. The jacket is mounted on the exterior of the tool body and has a mill surface which is adapted to bend the malleable members from the open position to the closed position. Relative axial movement of the jacket and the tool body causes the malleable members to bear on the mill surface and bend to the closed position.

主权项

1. A tool for retrieving material from a well, said retrieval tool comprising:
(a) a cylindrical tool body adapted for connection to a work string and for insertion into a well, said tool body defining a chamber adapted to receive material to be retrieved from said well; (b) malleable members provided on the lower end of said tool body, said malleable members adapted to bend from an open position allowing ingress of said material into said chamber to a closed position restricting egress of said material from said chamber; (c) a cylindrical jacket mounted on the exterior of said tool body over the lower end thereof, said jacket having an open end allowing ingress of said material into said chamber, (d) a mill surface provided on said jacket adapted to bend said malleable members from said open position to said closed position; (e) said jacket and said tool body being operatively engaged for relative axial movement as said tool body is manipulated by said work string, said relative movement causing said malleable members to bear on said mill surface and bend from said open position to said closed position; (f) wherein said jacket and said tool body are operatively engaged by a pin and a slot, said pin engaging and traveling through said slot as said tool body is manipulated by said work string; and (g) wherein said slot comprises a first stop in which weight from said tool body is transferred to said jacket and a second stop in which weight from said tool body is transferred to said jacket, said first and second stops being offset axially such that said malleable members are remote from said mill surface as weight is transferred from said tool body at said first stop and said malleable members have been moved to said closed position as said weight is transferred from said tool body at said second stop.