Rail type iron roughneck

Abstract

The invention relates to a rail type iron roughneck, which is used for performing screwing and / or unscrewing operation on an upper part pipe fitting and a lower part pipe fitting. The rail type iron roughneck is characterized by comprising a rail, a base, a spinning wrench and an upper unscrewing wrench, wherein the base can move forwards to the work position along the rail or can move backwards so as to be far away from the work position; the spinning wrench is arranged on the base; the upper unscrewing wrench is arranged on the base and is positioned under the spinning wrench. The iron roughneck related by the invention is the rail type iron roughneck. Compared with a cantilever type iron roughneck, the rail type iron roughneck breaks through the limitation of the cantilever length on the work range; the work range of the iron roughneck is obviously increased.

Description

technical field [0001] The invention relates to a drilling and workover equipment, in particular to a rail-type iron driller. Background technique [0002] During the drilling process and maintenance process of oil and oil wells, the tools used to complete the make-up and break-out of drilling tools usually include hydraulic tongs and telescopic arm type iron drillers. The commonly used tool for making and breaking breakouts in practice is hydraulic tongs, but the degree of automation of hydraulic tongs is low, and the labor intensity of the operator is high; later, a telescopic arm type iron driller with a high degree of automation was developed, which can reduce the strength of the laborers, but Due to the limitation of arm length, the working distance is limited. [0003] The Chinese patent document CN 202689976 U that the applicant has been authorized discloses a cantilever type iron driller, comprising: a column base; a telescopic arm, one end of which protrudes from t...

AI Technical Summary

Problems solved by technology

[0006] 2. The turnbuckle pliers are equipped with a vertical displacement compensation mechanism to compensate the vertical displacement of the turnbuckle device, but there is no device for compensating the horizontal displacement. When the pipe has an inclination angle in the vertical direction, the inclination angle will cause The deviation between the position of the pipe fitting and the center of the clamp in the horizontal direction results in a loss of clamping effect;

[0007] 3. There is no cleaning device, and external equipment is needed to clean the butt-connected threads, which prolongs the working time and affects the degree of automation;

[0008] 4. There is no mud blowout prevention device. After the shackle is completed, the iron driller needs to exit first, and then use external equipment to collect the mud sprayed under high pressure, which prolongs the working time, and the iron driller needs to withdraw to the initial stage. The mud blowout preventer device can only enter after the position, which makes the safe space around the wellhead also compressed

However, in this application, the position of the mud blowout preventer is relatively close to the clamp, which will affect the operator's observation of the operation process of the clamp

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