Sump packer latching mechanism
Patent
·
OSTI ID:6754655
This patent describes an apparatus for effecting successive locking and unlocking of a tubing string to a hollow bore packer secured downhole in a subterranean well bore wherein the locking of the tubing string to the hollow bore packer can withstand a tensile force on the order of about 100,000 pounds. It comprises: means on the hollow bore packer defining a downwardly facing internal shoulder; a tubular locking mechanism secured to the bottom of the tubing string; the locking mechanism comprising an inner mandrel element secured to the bottom end of the tubing string, and a locking sleeve freely surrounding the inner mandrel element and carrying peripherally spaced, radially shiftable locking means; supporting means on the inner mandrel element engageable and disengageable with the locking means by axial movements of the inner mandrel relative to the locking sleeve to permit radial shifting and retraction of the locking means into and out of engagement with the downwardly facing internal shoulder; and pin and slot means interconnecting the inner mandrel and the locking sleeve.
- Assignee:
- Baker Hughes Inc., Houston, TX (USA)
- Patent Number(s):
- A; US 4928768
- Application Number:
- PPN: US 7-308878A
- OSTI ID:
- 6754655
- Country of Publication:
- United States
- Language:
- English
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