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经营范围
发明名称
COUPLING APPARATUS
摘要
A coupling apparatus is provided for quick coupling of surface pumping equipment to a cylindrical member. The cylindrical member is engaged by dogs which are urged into locking position about the cylindrical member.
申请公布号
US5152554(A)
申请公布日期
1992.10.06
申请号
US19900629542
申请日期
1990.12.18
申请人
LAFLEUR PETROLEUM SERVICES, INC.
发明人
LAFLEUR, KARL K.;WADE, DONALD R.
分类号
E21B17/02;E21B21/01;F16L37/12
主分类号
E21B17/02
代理机构
代理人
主权项
地址
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