Title:
CORE COLLECTING APPARATUS
Document Type and Number:
Japanese Patent JPS6078092
Kind Code:
A
Abstract:
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.
Inventors:
DEIBITSUDO ESU ROURII
JIEEMUZU TEII OOMAN
JIEEMUZU TEII OOMAN
Application Number:
JP18661984A
Publication Date:
May 02, 1985
Filing Date:
September 07, 1984
Export Citation:
Assignee:
CHRISTENSEN INC NORTON
International Classes:
E21B25/06; (IPC1-7): E21B25/00
Attorney, Agent or Firm:
Aoki Akira
Previous Patent: The manufacturing method of a polyethylene system resin lamination foaming sheet, a polyethylene sys...
Next Patent: JPS6078093
Next Patent: JPS6078093