Leakage-control well completion pipe string and method

• Main Authors: ZHANG JIE, WU CHUNHONG, HWANG JI YEON, HU YONG, MA GUORUI, ZHAO HAIYANG, ZHAI KEJUN, LI WEILIANG, PAN LIJUAN, HUANG LIANG
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• 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 relates to a leakage-control well completion pipe string and method. The leakage control method comprises the following steps that a setting pipe column part is put into a well, the setting pipe column part is hung on an outer-layer casing pipe in a setting and setting mode, and the setting pipe column part comprises a leakage control assembly; in the first state, a back-inserting tubular column part is put into a well, and a leakage control switch tool in the back-inserting tubular column part is connected with the leakage control assembly to open the leakage control assembly, so that the interior of the setting tubular column part is communicated up and down; and in the second state, the leakage control assembly is closed by lifting the back-inserting tubular column part, so that the upper part and the lower part in the setting tubular column part are sealed and separated. 本发明涉及控漏失完井管柱及方法。该控漏失方法包括以下步骤：向井内下入坐封管柱部分，使所述坐封管柱部分坐封坐挂在外层套管上，所述坐封管柱部分包括控漏失组件；在第一状态下，通过向井内下入回插管柱部分并使所述回插管柱部分中的控漏失开关工具与所述控漏失