BACK TONGS FOR HYDRAULIC OIL PIPE TONGS

The utility model relates to back tongs for a pair of hydraulic oil pipe tongs, which belongs to an oil well working tool. The back tongs which comprise a tong head and a tong body are connected with the hydraulic oil pipe tongs by a tong bar and a tong shaft, and thus, an integral body is formed. W...

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Bibliographische Detailangaben
Hauptverfasser:	JIN ZHANZHONG, YIN HUIHUAN
Format:	Patent
Sprache:	eng
Schlagworte:	HAND TOOLS MANIPULATORS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING
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Beschreibung
Zusammenfassung:	The utility model relates to back tongs for a pair of hydraulic oil pipe tongs, which belongs to an oil well working tool. The back tongs which comprise a tong head and a tong body are connected with the hydraulic oil pipe tongs by a tong bar and a tong shaft, and thus, an integral body is formed. When the oil pipe is rotated by the hydraulic oil pipe tongs, the back tongs can seize the coupling of the oil pipe to prevent a release accident caused by the rotation of the lower part of the coupling. The utility model has the advantages of simple structure, compactness, convenient operation and high reliability.