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发明名称
Apparatus for accelerating the removal of cuttings from the bottom of wells
摘要
申请公布号
US2634101(A)
申请公布日期
1953.04.07
申请号
US19490103606
申请日期
1949.07.08
申请人
PEARL SLOAN
发明人
SLOAN PEARL
分类号
E21B21/00;E21B41/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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