可控式大裂缝堵漏工具研制及应用

Development and application of the controllable large crack plugging tool

摘要:

在钻井过程中出现的大裂缝或小型溶洞漏失，这些恶性漏失采用堵漏材料难以见效，利用可控式堵漏工具进行封堵是一种行之有效的堵漏手段。针对这类恶性漏失，我们设计了一种可以容易操控并能够准确将拦截袋和不同类型堵漏材料送到钻孔内漏失位置的堵漏工具。该工具能有效避免堵漏材料被水稀释或者被水流冲走，在漏失位置能形成有效封堵，从而实现对大裂缝的堵漏。

Abstract:

In the process of drilling， when circulation loss occurs due to large fractures or small karst caves where plugging materials cannot work effectively， controllable plugging tools are an effective plugging method. In view of this severe circulation loss， we designed a kind of plugging tool which can be easily manipulated and can accurately deliver the interception bag and different types of plugging materials to the leakage position in the borehole. The tool can effectively prevent the plugging material from being diluted by water or washed away by water flow， and form effective plugging at the leakage position， so as to realize the plugging of large fractures.