Petroleum drilling equipment, iron roughneck and buckle screwing and unscrewing device for iron roughneck

Abstract

The invention discloses a buckle screwing and unscrewing device for an iron roughneck. The buckle screwing and unscrewing device comprises clamping pliers, buckle punching pliers, and a buckle punching oil cylinder, wherein one end of the buckle punching oil cylinder is fixed on the clamping pliers, and the other end of the buckle punching oil cylinder is hinged to the buckle punching pliers; a supercharging device is connected to the buckle punching oil cylinder, and under at least one predetermined state, a rod cavity of the buckle punching oil cylinder is used for oil intake, and a rodless cavity is used for oil returning; the supercharging device provides pressure Pa which is larger than the system pressure P for the rod cavity of the buckle punching oil cylinder. According to the buckle screwing and unscrewing device disclosed by the invention, the supercharging device is additionally arranged, so that the working pressure of the buckle punching oil cylinder is increased; in addition, under the condition that the system of a whole pumping station is maintained unchanged, and the external dimension, the structure and the mounting dimension of the buckle punching oil cylinder are maintained unchanged, no matter whether a drilling tool is screwed forwards or backwards, the buckle screwing torque and the buckle unscrewing torque which conform to design requirements can be achieved. The invention further discloses the iron roughneck and petroleum drilling equipment.

Description

technical field [0001] The invention relates to the field of petroleum equipment, in particular to an iron driller make-up and breakout device, and iron drillers and oil drilling equipment using the make-up and breakout device. Background technique [0002] In oil drilling and workover operations, the connection and disassembly of pipe strings such as drill pipes and drill collars is a repetitive and heavy work. The current common solution is to configure hydraulic tongs or power tongs in oil drilling equipment. In this operation mode, hydraulic tongs or power tongs are frequently moved between the wellhead, retractable position, rat hole, and column storage position. It still needs to be completed manually, so that the labor intensity and safety risk are still relatively large. Therefore, it is gradually replaced by iron drillers at present. [0003] An iron driller is a power tool for oil drilling or workover operations, including mobile devices and power tongs. The mov...

AI Technical Summary

Problems solved by technology

[0007] 1) The use of double cylinder punching can meet the needs of make-up and break-out work, but it also increases the overall size and cost

[0008] 2) Only single punching oil cylinder is used. This scheme sacrifices the working range and is only suitable for one of the positive or reverse drilling tools. The range of drilling tools is small, the punching angle is small, and the operation efficiency is low.

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