Method and apparatus for consolidating a subsurface earth formation
Methods and apparatus are provided for treating an unconsolidated subsurface earth formation. Means are provided for isolating and perforating a preselected section of a well bore, and thereafter sequentially introducing selected formation treating agents into the perforated formation. After these materials are in the formation, a suitable temporary plugging agent is deposited in the perforation, to prevent its collapse, as well as to block the entrance of well-bore fluids. In the apparatus, the plugging agent is held in the annulus defined by a pair of spaced-apart elastomeric packing cups, and the equipment is merely shifted to position the cups above and below the perforation to enable the plugging agent to flow into the perforated formation. The apparatus preferably includes provision for a closeable bypass around the plugging agent held between the cups, whereby the apparatus may be moved up or down a fluid-filled casing without disturbing the plugging agent. (29 claims)
- Assignee:
- Schlumberger Technol Corp.
- Patent Number(s):
- US 3593797
- OSTI ID:
- 5666756
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
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Production
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ADDITIVES
BOREHOLES
CAVITIES
CONTAINERS
ENGINEERING
ENHANCED RECOVERY
EQUIPMENT
FLUID FLOW
FLUIDS
GEOLOGIC FORMATIONS
NATURAL GAS WELLS
OIL WELLS
PERFORATION
PLUGGING
RECOVERY
RESERVOIR ENGINEERING
SAND
STABILIZATION
WELL CASINGS
WELL COMPLETION
WELLS