Title: Selectively releasable overshot and pull tool

Abstract: A pulling tool for retrieving an article or fish from a well bore and utilizing a spear or grapping type action to establish connection with the fish. Cooperative internal and external tubular members are selectively movable to secure the pulling tool to the fish or to release the fish. An internal spring element cooperating with a positioning pin establishes controlled relative movement of the internal and external tubular members upon simple linear movement of the tool.

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Inventors: Taylor, William T. (Warren, TX, US)

Application Number: 062912
Filing Date: 1979-08-02
Publication_date: 1980-11-11
Assignee:
Primary Class(es): 294/86.21 294/86.25, 294/86.3
Other Classes:
US Patent Ref:

2250463	Jul, 1941	Boynton	403/13.
2893491	Jul, 1959	Crowe	175/315.
3211479	Oct, 1965	Brown	285/360.
4061389	Dec, 1977	Keller et al.	294/86.
4093294	Jun, 1978	Taylor	294/86.
4101157	Jul, 1978	Richey	294/86.

Other Refs:
Primary Examiner: Cherry, Johnny D.
Assistant Examiner:
Attorney: Matthews; Guy E.