The use of casing patches to improve workover success rates
Conference
·
OSTI ID:5352271
Until 1983, traditional cement squeeze techniques were used to shut off excess water production from wells in the Forties Field. The success rate was low, some 50% of workovers failing within 5 days of the well being returned to production. Casing patches over 120 feet long are now being run to cover the squeezed off perforations and workover effectiveness has increased dramatically. Radioactive tracers are employed to ensure accurate depth control as the patches are run and set on drillpipe. It is envisaged that continuous patches could be run when extremely long perforated intervals are encountered and alternative uses, e.g., to repair mechanically damaged casing, can be foreseen.
- OSTI ID:
- 5352271
- Report Number(s):
- CONF-850941-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BUILDING MATERIALS
CEMENTS
CONTROL
DAMAGE
DEPTH
DIMENSIONS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW BLOCKAGE
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
MATERIALS
NATURAL GAS WELLS
OIL WELLS
OXYGEN COMPOUNDS
PERFORATION
PIPES
PRESSURE CONTROL
REPAIR
SEALS
TRACER TECHNIQUES
WATER
WELL CASINGS
WELL SERVICING
WELLS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BUILDING MATERIALS
CEMENTS
CONTROL
DAMAGE
DEPTH
DIMENSIONS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW BLOCKAGE
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
MATERIALS
NATURAL GAS WELLS
OIL WELLS
OXYGEN COMPOUNDS
PERFORATION
PIPES
PRESSURE CONTROL
REPAIR
SEALS
TRACER TECHNIQUES
WATER
WELL CASINGS
WELL SERVICING
WELLS