专利检索 ap:("US AGRICULTURE") AND inv:"MIELKE LLOYD N" 第 1 页

1.

发明授权
Apparatus and method for obtaining undisturbed soil core samples 失效

公开(公告)号：US3872935A

公开(公告)日：1975-03-25

申请号：US46565074

申请日：1974-04-30

申请人： US AGRICULTURE

发明人： MIELKE LLOYD N

IPC分类号： E21B7/26 , E21B25/06 , E21B49/02

CPC分类号： E21B7/26 , E21B25/06

摘要： Large-diameter, undisturbed soil core samples were obtained from a variety of soils. Handling and fracturing of the undisturbed soil cores were minimized by encasing the cores in heatshrinkable plastic tubes during sampling operations.