Title: Pneumatic recycle back full-scale drilling debris sampler
Application Number: 90106791 Application Date: 1990.08.06
Publication Number: 1049212 Publication Date: 1991.02.13
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: E21B25/08,G01N1/28
Applicant(s) Name: Coalfield Geological Prospecting Co., Hebei Prov. Address: 054022
Inventor(s) Name: Gao Shijun
Attorney & Agent: LIU XIAOPING
Abstract:
     The invention is related to pneumatic reverse circulation drilling crumbs collector. The cyclone and cut-off clutch are combined, so the rock crumbs which mect the demand of the geology identifition are obtained with simple technique in pneumatic reverse ciculation drilling. The design is reasonable.
Time: 13