-
公开(公告)号:US4296821A
公开(公告)日:1981-10-27
申请号:US119461
申请日:1980-02-07
申请人: Leslie Larson
发明人: Leslie Larson
IPC分类号: E21B6/00 , E21B7/20 , E21B19/084 , E21B4/06
CPC分类号: E21B6/00 , E21B19/084 , E21B7/20
摘要: An improved drilling rig (10) and conversion apparatus for drilling rigs is disclosed. The rig includes a percussion assembly (32) rotatably mounted to a ram (30) above the ground in which drilling is to be made. The rig (10) includes a conversion mandrel (40) structured for insection in, and retention by, the percussion assembly (32) in place of a normally retained bit element (34). The mandrel (40) has an anvil surface (56) to which percussive strokes of a piston (50) disposed within the percussion assembly (32) for reciprocating movement therein are applied. The mandrel (40) further includes a hammer portion (68) to transfer both the percussive force of the piston (50) and continuous downward pressure applied to the percussion assembly (32) by the ram 30 to a length of casing (20) encircling the drill rod (22) which accomplishes the drilling. The conversion apparatus can, therefore, convert a bottom-hole drilling rig to a top-of-the-hole rig.
摘要翻译: 公开了一种改进的钻机(10)和用于钻机的转换装置。 钻机包括可旋转地安装在要在其中进行钻孔的地面上方的冲头(30)上的冲击组件(32)。 钻机(10)包括转换心轴(40),其被构造成用于对打击组件(32)进行检查和保持,以代替正常保持的钻头元件(34)。 心轴(40)具有砧座表面(56),施加设置在冲击组件(32)内用于往复运动的活塞(50)的冲击冲程。 心轴(40)还包括锤部分(68),以将活塞(50)的冲击力和连续向下的压力通过冲头30施加到打击组件(32)上,使其围绕一段长度的套管(20) 钻杆(22)完成钻孔。 因此,转换装置可以将钻井钻井平台转换成钻井平台。