Dual string packer mill
A packer mill is described comprising: an annular sleeve; means on the lower end of the sleeve for milling the periphery of a packer; an axial mandrel inside the sleeve; means on the lower end of the mandrel for milling an axial hole into the upper end of a packer at an elevation above the milling of the periphery of the packer; an axial slidable gripper sleeve on the mandrel including longitudinally extending fingers. Each of the fingers comprises outwardly facing serrations for gripping the walls of the hole in the packer; a camming sleeve on the mandrel inside the gripper sleeve for camming the fingers radially outwardly for engaging the walls of the axial hole milled in the packer for supporting the packer; a release ring around the mandrel engaging an end of the camming sleeve; and means for bursting the ring in hoop tension upon application of sufficient axial force between the mandrel and camming sleeve for releasing the camming sleeve for axially sliding away from the gripper sleeve for permitting the fingers to collapse radially inwardly.
- Assignee:
- Smith International, Newport Beach, CA
- Patent Number(s):
- US 4696502
- OSTI ID:
- 6054574
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
APERTURES
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
MACHINE TOOLS
MACHINING
MATERIALS HANDLING EQUIPMENT
MECHANICAL STRUCTURES
MILLING
MILLING MACHINES
NATURAL GAS WELLS
OIL WELLS
OPENINGS
PACKINGS
PIPES
SLEEVES
SUPPORTS
TOOLS
WELL COMPLETION
WELLS