Sequential inflatable packer

Patent · Tue Mar 25 04:00:00 EST 1986

OSTI ID:5668907

Suman, G O

An apparatus is described for use in a well bore traversing earth formations consisting of: first and second inflatable packer means coupled in a string of tubular casing traversing each formations where the well bore contains fluid and each of the packer means has inflatable packer elements which are inflatable into sealing engagement with a well bore, first means including a first passageway for transmitting fluid under pressure from the interior of the string of casing to an interior space behind the inflatable packer element in the first packer means for inflating such packer element, first flow rate control means in the first passageway for controlling the flow rate of fluid to the interior space behind the inflatable packer element to provide a first flow rate of inflation, second means including a second passageway for transmitting fluid under pressure from the interior of the string of casing to an interior space behind the inflatable packer element in the second packer means for inflating such packer element, second flow rate control means in the second passageway for controlling the flow rate to the interior space behind the inflatable packer element to provide a second flow rate of inflation, the first and second flow rate control means being functionally related to one another to provide a higher flow rate of fluid in a lowermost packer means than in the next above packer means for inflating a packer element on the lower-most packer means into sealing engagement with a well bore prior to inflating a packer element on a packer means into sealing engagement with a well bore.

• Assignee: Completion Tool Co., Houston, TX
• Patent Number(s): US 4577696
• OSTI ID: 5668907
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW RATE
FLUIDS
INFLATABLE SEALS
INSTALLATION
NATURAL GAS WELLS
OIL WELLS
OPERATION
PACKINGS
PIPES
PRESSURE EFFECTS
RESERVOIR FLUIDS
SEALS
WELL CASINGS
WELLS