发明名称 VIBRATION ISOLATOR AND SHOCK ABSORBER ARRANGEMENT FOR USE IN A DRILLSTRING
摘要 <p>A vibration isolator and shock absorber device is presented wherein elastomeric vibration isolation elements interact with reaction elements to form differential springs, i.e., springs in which the deflection and load characteristics change with load. In the present invention, the load characteristics change from shear at low loading to compression at high loading, with a smooth transition between shear and compression.</p>
申请公布号 GB2175369(A) 申请公布日期 1986.11.26
申请号 GB19860011645 申请日期 1986.05.13
申请人 * TELECO OILFIELD SERVICES INC 发明人 ALLEN * DUCKWORTH
分类号 E21B17/07;E21B47/01;E21B47/18;F16F1/38;(IPC1-7):F16F1/38 主分类号 E21B17/07
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