Coring device with an improved weighted core sleeve and anti gripping collar

Patent · Tue Apr 23 04:00:00 EST 1985

OSTI ID:5252802

Aumann, J T; Filshtinsky, M

An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to a coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is connected to a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter to prevent binding or jamming.

• Assignee: Christensen Inc.
• Patent Number(s): US 4512423
• OSTI ID: 5252802
• 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
CORING EQUIPMENT
DESIGN
DRILL BITS
DRILL CORES
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
EXPLORATION
NATURAL GAS WELLS
OIL WELLS
PIPES
SLEEVES
WELL LOGGING
WELLS