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发明名称
WELLHEAD ARRANGEMENT FOR ELIMINATING PIPE STRING SEIZURE IN HOLE
摘要
申请公布号
SU1583585(A1)
申请公布日期
1990.08.07
申请号
SU19864137582
申请日期
1986.10.24
申请人
KH KT OTDEL UK NI GEOLOGORAZVEDOCHNOGO INSTITUTA
发明人
VOTINOV YURIJ V,SU;ZMIEVSKOJ ALEKSEJ N,SU
分类号
E21B31/107;E21B23/00;E21B28/00
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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