Coring device with a improved core sleeve and anti-gripping collar with a collective core catcher

Patent · Tue Jan 28 00:00:00 EST 1986

OSTI ID:5961295

Story, A L; Filshtinsky, M

This patent describes an improved coring apparatus used in combination with a coring bit and drill string. This device consists of: an outer driving structure adapted to be connected at one end to the coring bit for cutting a core in a borehole, and at the other end to the lower end of the drill string in telescoping and co-rotatable manner therewith; an inner barrel disposed within the outer driving structure and including a lower end portion adjacent to the bit; first means supporting the inner barrel in spaced relationship to the outer driving structure while permitting rotation of the driving structure with respect to the inner barrel; a woven metal mesh sleeve mounted in surrounding relation on at least a portion of the exterior surface of the inner barrel; second means, connected to a free end of the sleeve opposite the leading portion of the sleeve, for maintaining the portion of the sleeve which surrounds the inner barrel in compression and to maintain an inside diameter greater than the outside diameter of the inner barrel of the portion of the sleeve surrounding the inner barrel while the portion of the sleeve positioned inside the inner barrel being in tension to grip and compress a core received within the sleeve and having an outside diameter less than the inside diameter of the inner barrel when in tension, wherein the second means is also for engaging the core when the means is drawn into the inner barrel, and third means positioned within the inner barrel and connected to the leading portion of the sleeve to draw the sleeve within the inner barrel and to apply tension to the portion of the sleeve within the barrel to encase and grip the core as it is cut.

• Assignee: Norton Christensen, Inc., Salt Lake City, UT
• Patent Number(s): US 4566545
• OSTI ID: 5961295
• Resource Relation: Patent File Date: Filed date 29 Sep 1983
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
42 ENGINEERING
CORING EQUIPMENT
DESIGN
WELL DRILLING
BOREHOLES
DRILL BITS
DRILL CORES
DRILL PIPES
POSITIONING
ROTATION
SLEEVES
SPACE DEPENDENCE
STRAINS
CAVITIES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
MOTION
PIPES
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)