Well tool retrieving apparatus

Patent · Tue May 23 04:00:00 EDT 1967

OSTI ID:6368089

McGill, H L

The running-in and retrieving overshot is adapted for use with apparatus for packing-off a well bore. The overshot may be continually rotated to cut away accumulated debris until it is positively re-engaged with a fishing neck of a bridge plug. A second member adapted to be received within an overshot is movably mounted on an upright member of a well tool. The 2 members are coupled together such that after the overshot has become engaged with the second member, the overshot can still be rotated until it has become securely connected to the well tool member. The overshot is arranged to be positively secured against rotation relative to the fishing neck whenever the overshot is rotated in one direction. When rotated in the opposite direction, the overshot is selectively coupled to the fishing neck such that, by varying the magnitude of applied torque, it is either co-rotatively secured to the fishing neck or is released for relative rotation. (9 claims)

• Assignee: Schlumberger Technol Corp.
• Patent Number(s): US 3321018
• OSTI ID: 6368089
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CLEANING
ENERGY SOURCES
FOSSIL FUELS
FUELS
OIL WELLS
PETROLEUM
PLUGGING
RETRIEVAL SYSTEMS
TOOLS
WELLS