Blocking pipe column

The invention relates to a blocking pipe column. The blocking pipe column comprises a plug, a first packer, a second packer, a screen pipe and a pressure compensator, wherein the pressure compensator is connected between the plug and the second packer in series; the pressure compensator comprises an...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	MA HONGWEI, ZHA XUAN, SHE MEIQING, LU YIXIAN, QIN SHIQUN, LIU KEWEI, MIAO YULI, YANG YUSHAN, LIU JUNMIN
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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to a blocking pipe column. The blocking pipe column comprises a plug, a first packer, a second packer, a screen pipe and a pressure compensator, wherein the pressure compensator is connected between the plug and the second packer in series; the pressure compensator comprises an outer cylinder, a movable pipe and a spring, a pressure compensation cavity is defined by the movable pipe and the outer cylinder, and a pressure compensation hole is formed in the outer cylinder and communicated with the lower portion of the pressure compensation cavity; and the movable pipe is provided with an inner side pressure bearing surface and an outer side pressure bearing surface. When the first packer and the second packer are unsealed, the pipe column is lifted up, the pressure below the second packer is reduced, and the pressure in the pressure compensation cavity is reduced; and when the pressure intensity of liquid in the blocking pipe column is larger than that of liquid in the pressure compensatio