Compression packer
Patent
·
OSTI ID:6986187
A compression (set down) packer is described which has a slip-type hold down actuated by hydraulic pressure from below the packing elements. The packer is full opening and will permit through-tubing operations. Once the packer's downward movement is stopped and the packer elements have been expanded by conventional means (including J-slot pin means for preventing unwanted expanding of the lower slips), pressure from below the packer (applied through the tubing to which the packer is attached) forces a piston and, usually, at least one booster piston upward to move a slip cone under the tapered surface of the upper slips to cause them to bear against the wall surface, usually the casing of the well. This outward movement of the slips stops upward movement of the packer device. Because a vacuum is created when the piston advances under pressure, the piston and slip cone retract to relieve the vacuum condition when hydraulic pressure is released (or greatly reduced). Subsequently, placing tension on the tubing releases the lower slips, and the packer may be withdrawn from the well. (5 claims)
- Assignee:
- Dow Chemical Co.
- Patent Number(s):
- US 3845816
- OSTI ID:
- 6986187
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydraulic actuated weight set well packer
Well pump assembly and packer
Well packers and slip assemblies for use therewith
Patent
·
Mon Feb 26 23:00:00 EST 1979
·
OSTI ID:6366030
Well pump assembly and packer
Patent
·
Mon Mar 09 23:00:00 EST 1992
·
OSTI ID:5251398
Well packers and slip assemblies for use therewith
Patent
·
Tue Jul 19 00:00:00 EDT 1983
·
OSTI ID:5615956