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发明名称
一种密封式伸缩钻杆
摘要
本实用新型公开了一种能从钻杆中直接注水的伸缩式钻杆,它包括外套钻杆,内套钻杆,采用在内套钻杆顶端安装活动密封装置或在外套钻杆底端安装固定密封装置,使钻杆在伸缩中或伸缩完毕时密封住钻杆间隙,以使钻杆能直接注水,降低了劳动强度,节省了时间,提高了工程的效率。
申请公布号
CN2246189Y
申请公布日期
1997.01.29
申请号
CN95222269.8
申请日期
1995.09.08
申请人
程天森
发明人
程天森
分类号
E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
1、一种密封式伸缩钻杆,包括外套钻杆,内套钻杆,其特征在于:在内套钻杆顶端安装有活动密封装置或在外套钻杆的底端和内套钻杆法兰盘上顶面安装有固定密封装置。
地址
433200湖北省洪湖市茅江办事处乌林大道3号
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