Ground surface bumper jar for drill pipe release

• Main Authors: ZHOU GUONING, SHAO SHUAI, ZHAO GUANGYOU, LI XUESONG, WEI ZHONGHE, DONG WANXU, YANG SHUHONG, WEI CAIHE
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• 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 utility model relates to a ground surface bumper jar for drill pipe release. The ground surface bumper jar consists of an upper connector, a hexagonal connector, a hexagonal mandrel, a cylinder sleeve, a lock pin, an adjusting nut, an energy storage mechanism assembly, a locking mechanism assembly, a slips shaft and a lower connector, wherein the lower end of the upper connector is connected with the hexagonal mandril through threads, and the lower end of the hexagonal mandrel is connected with the slips shaft through threads; the hexagonal connector is arranged at the outer side of the hexagonal mandrel, the lower end of the hexagonal connector is connected with the cylinder sleeve through threads, and the lower end of the cylinder sleeve is connected with the lower connector through threads; the adjusting nut and the lock pin are arranged at the inner side of the cylinder sleeve; the energy storage mechanism assembly and the locking mechanism assembly are arranged at the inner side of the lower connecto