$Tie-back tool for fracturing$

Tie-back tool for fracturing

The invention belongs to the technical field of well completion, and particularly relates to a tie-back tool for fracturing. The tie-back tool is used for being connected with the drilling liner hanger, the tie-back tool comprises a first tie-back mechanism and a second tie-back mechanism, in the fi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG GUANLIN, YAO HUIQIAN, BAI CHUANLEI, LI ZHEN, ZHANG GUOLIANG, SU DONGTAO, YAN SHENGYU, WANG CHAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The invention belongs to the technical field of well completion, and particularly relates to a tie-back tool for fracturing. The tie-back tool is used for being connected with the drilling liner hanger, the tie-back tool comprises a first tie-back mechanism and a second tie-back mechanism, in the first state, the first tie-back mechanism is matched with the drilling liner hanger, a first sealing mechanism sealed with the drilling liner hanger is arranged on the outer wall of the first tie-back mechanism, and in the second state, the second tie-back mechanism is matched with the drilling liner hanger. The second tie-back mechanism is matched with the drilling liner hanger, a second sealing mechanism sealed with the drilling liner hanger is arranged on the outer wall of the second tie-back mechanism, and the sealing area of the second sealing mechanism is different from the sealing area of the first sealing mechanism. The problem that sealing failure of a tie-back tool is difficult to solve can be solved. 本发明属于