Core barrel apparatus for disposing a core within a thin, flexible film casing

Patent · Tue Feb 17 04:00:00 EST 1987

OSTI ID:7097536

Aiura, N; Sawaki, Y

An apparatus is described for retaining and retrieving cores comprising: tubular mandrel means for defining an annular space, the core disposable concentrically within the mandrel means wherein the mandrel means comprises a spring loaded inner cylindrical tubular mandrel longitudinally extending within the apparatus. An outer tubular mandrel is concentric with the inner mandrel and longitudinally overlapping the inner mandrel to define the annular space between the inner mandrel and outer mandrel. The inner and outer mandrels are urged into mutual contact at the lower extremity of the inner mandrel; a pliable sleeve stored within the annular space, the pliable sleeve characterized as thin film material, the pliable sleeve being disposed between and contacted by the inner and outer mandrels across the lower extremity of the inner mandrel at the point of contact. The pliable sleeve is temporarily secured in place by resilient compression of the inner mandrel toward the outer mandrel against the sleeve; and guide plug means concentrically disposed within the mandrel means and coupled to the pliable sleeve.

• Assignee: Norton Christensen, Inc., Salt Lake City, UT
• Patent Number(s): US 4643265
• OSTI ID: 7097536
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ANNULAR SPACE
CLOSURES
CONFIGURATION
CORING EQUIPMENT
DRILL CORES
DRILLING EQUIPMENT
EQUIPMENT
FILMS
FLEXIBILITY
MECHANICAL PROPERTIES
NATURAL GAS WELLS
OIL WELLS
SPACE
TENSILE PROPERTIES
THIN FILMS
WELL CASINGS
WELLS