Tail pipe rubber plug system for drilling liner cementing construction

• Main Authors: LI FUPING, ZHANG ZHENFENG, WEI SHULEI, FENG LIYING, ZHAO CHENGQIAN, ZHANG XINLIANG
• Format: Patent
• Language: Chinese; English
• Published: 02.04.2024
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a tail pipe rubber plug system for tail pipe well cementation construction, which comprises a drill rod rubber plug, a tail pipe rubber plug arranged below the drill rod rubber plug and a tail pipe rubber plug short section arranged below the tail pipe rubber plug, and the drill rod rubber plug can be connected with the tail pipe rubber plug to form a first composite body after descending. The first composite body can move downwards, and the tail pipe rubber plug can be connected with the tail pipe rubber plug short section, so that the first composite body and the tail pipe rubber plug short section form a second composite body, and the second composite body can continue to move downwards. The scraping effect of the tail pipe can be improved, and drilling fluid and cement paste are effectively isolated. 本发明提供一种用于尾管固井施工的尾管胶塞系统，包括钻杆胶塞、设置于钻杆胶塞下方的尾管胶塞、设置于尾管胶塞下方的尾管胶塞短节，钻杆胶塞能够在下行后与尾管胶塞连接形成第一复合体，第一复合体能够下行且其中的尾管胶塞能够与尾管胶塞短节连接，以使得第一复合体与尾管胶塞短节形成第二复合体，第二复合体能够继续下行。本发明能够提升尾管刮拭效果，有效隔离钻井液与水泥浆的。