Method and apparatus for chemical treatment of subterranean well bores

Patent · Tue Sep 03 04:00:00 EDT 1991

OSTI ID:5797685

Coronado, M P

This patent describes an inflatable well treatment tool suitable for insertion into a well through a well conduit disposed in a well bore. It comprises a central tubular body assemblage connectable to a fluid supply conduit extending to the surface; the central tubular body assemblage defining a central fluid passage communicating with the fluid supply conduit; an outer tubular assemblage surrounding a medial portion of the central tubular body and cooperating therewith to define a generally annular fluid passage surrounding the central tubular body assemblage; resilient means urging the central tubular body assemblage downwardly relative to the outer tubular assemblage to a run-in position; the outer tubular asssemblage including at least one annular elastomeric means expandable by pressurized inflation fluid supplied through the annular fluid passage into sealing engagement with the well bore; inflate port means in the lower portion of the central tubular body assemblage connecting the central fluid passage to the annular fluid passage; the central tubular body assemblage having a first radial port in its upper end communicating with the well bore, whereby circulation may be maintained during run-in.

• Assignee: Baker Hughes Inc., Houston, TX (United States)
• Patent Number(s): A; US 5044444
• Application Number: PPN: US 7-548622
• OSTI ID: 5797685
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CHEMICAL COMPOSITION
CHEMICAL LOGGING
DRILLING FLUIDS
ELASTOMERS
EQUIPMENT
FLUID INJECTION PROCESSES
FLUIDS
OIL WELLS
POLYMERS
PRESSURE GRADIENTS
STIMULATION
WELL CASINGS
WELL COMPLETION
WELL LOGGING
WELL STIMULATION
WELLS