Water injection pump packing gland disassembling and assembling wrench with stress application rod for oil field

The utility model relates to the field of oil field equipment maintenance wrenches, in particular to a water injection pump packing gland disassembling and assembling wrench with a stress application rod for an oil field. The stress application sleeve and the handle sleeve are arranged on the upper portion of the rod body in a sleeving mode, and the inner boss is arranged on the inner wall of the stress application sleeve, so that the overall length of the packing gland disassembling and assembling wrench can be prolonged when the wrench is used, operation is more labor-saving, and the stress application sleeve cannot be disengaged from the rod body; the supporting plates are arranged on the two sides of the reinforcing sleeve, and the stress application supporting rods are arranged between the stress application sleeve and the supporting plates, so that when the packing gland disassembling and assembling wrench is used, stress distribution is more uniform, and safety and stability are achieved; when the pack