Drawing device

Abstract

The invention provides a drawing device. A supporting seat includes a bearing plate and two supporting legs arranged on a lower end of the bearing plate; reinforcing plates are arranged on one sides of inner walls of the supporting legs; connection screw rods are arranged in the supporting legs; upper ends of the connection screw rods protrude out of the bearing plate; adjustment nuts are arrangedon the connection screw rods; sliding rails are arranged on inward outer walls of the supporting legs; hook portions matching the sliding rails are arranged on the sliding rails; each hook portion includes a supporting block and a hook; an annular boss is arranged on the top of the bearing plate; a thrust bearing is arranged under a handle in the axial direction; the handle includes a horizontalrod; and a lower end of a drawing rod has a threaded connection shaft sleeve and a connection bolt. The beneficial effects of the invention are that the reinforcing plates are arranged in the supporting legs, and the stable structural strength of the supporting legs and the bearing plate are enhanced; the hook portions can fix and hook work pieces so as to enhance the drawing strength and the stability of the drawing supporting seat; the threaded connection shaft sleeve is arranged on the lower end of the drawing rod and has outer threads formed on the outer periphery thereof which an match awork piece having inner threads so as to draw out the work piece.

Description

technical field [0001] The invention belongs to the technical field of petroleum equipment, in particular to a puller. Background technique [0002] A puller is often used to disassemble and assemble drilling tools in oil extraction. The puller exerts an axial pulling force on the drive shaft and slowly pulls the drive shaft out. A general puller includes a support, and the support is provided with a perforation that runs through the upper and lower end surfaces of the support. A fully threaded screw is provided in the perforation. The sinking tank structure is provided with a thrust bearing matched with the support of the lower end of the handle in the sinking tank structure. However, during the actual use of the puller, some threads and the wall of the perforated hole are damaged due to mutual friction. After the thread is damaged, the range of movement and adjustment cannot be guaranteed, and the screw rod needs to be replaced before it can continue to be used; in additi...

AI Technical Summary

Problems solved by technology

However, during the actual use of the puller, some threads and the wall of the perforated hole are damaged due to mutual friction. After the thread is damaged, the range of movement and adjustment cannot be guaranteed, and the screw rod needs to be replaced before it can continue to be used; in addition, the thrust bearing is set. In the sinker structure, this requires the support to have a certain thickness to ensure its stable strength, resulting in the support becoming very bulky. If the thickness is reduced, the structural strength of the support cannot be guaranteed, which will affect the overall pulling effect

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