Hollow hydraulic spinner

Abstract

The invention discloses a hollow hydraulic spinner which comprises a shell. An oil cylinder body, a piston rod and a fork head are mounted in the shell. A piston is mounted at the position, in the cylinder body, of the piston rod. A pipeline is arranged in the cylinder body. One end of the pipeline is connected with an oil inlet and an oil outlet in the two ends of the piston, and the other end of the pipeline communicates with a rotary joint mounted on the cylinder body. A pawl is mounted on the fork head and provided with a floating claw and a floating claw pressure spring. A pawl tension spring is mounted on the pawl. A transmission ratchet wheel and drive shaft assembly, a backstop claw and a backstop claw tension spring are mounted in the shell. A counter force arm assembly is mounted at the tail of the shell and closely connected with the shell through inner teeth and outer teeth. The hollow hydraulic spinner is suitable for being used in a petroleum drilling blowout preventer; all the parts of the spinner are made of high-strength aluminum-titanium alloys, so that the weight is low, the appearance is small, and the spinner can adapt to fastening and loosening of nuts and bolts in narrow space; and fastening torque can be controlled by controlling hydraulic pressure during fastening.

Description

technical field [0001] The invention belongs to the field of oil drilling, and in particular relates to a hollow hydraulic spinner. Background technique [0002] At present, a whole row of bolts and nuts of different specifications are used to connect the upper and lower sealing flanges of oil drilling blowout preventers of different specifications. The injector has high requirements, and the bolts and nuts connecting the two flanges require different tightening torques according to the specifications. Drilling workers often tighten and loosen bolts and nuts by beating with a ring wrench of fixed specifications and hammers. The work efficiency is low, and the tightening torque is often unable to be controlled. Contents of the invention [0003] The purpose of the present invention is to overcome the above problems in the prior art, and provide a hollow hydraulic spinner, which can adapt to tightening and loosening bolts and nuts in narrow spaces, and can control the tight...

AI Technical Summary

Problems solved by technology

[0002] At present, a whole row of bolts and nuts of different specifications are used to connect the upper and lower sealing flanges of oil drilling blowout preventers of different specifications. The injector has high requirements, and the bolts and nuts connecting the two flanges require different tightening torques according to the specifications

Drilling workers often tighten and loosen bolts and nuts by beating with fixed-sized ring wrenches and hammers. The work efficiency is low, and the tightening torque is often unable to be controlled.

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