Pipe column recognition and collar positioning device and method for iron roughneck

Abstract

The invention relates to a pipe column recognition and collar positioning device and method for an iron roughneck. The device is structurally characterized in that a displacement sensing part consistsof a displacement sensor and a magnetic ring, and a mounting assembly is formed by assembling of a front cover, two cover plates, two side plates and a rear cover; the displacement sensor is mountedon the rear cover, the magnetic ring is mounted at the rear end of a sleeve of a slide assembly, the sleeve of the slide assembly penetrates a front cover mounting hole, a spring is mounted between the front cover and the rear cover, and the sleeve and a measuring rod of the displacement sensor are both inserted into the sleeve; the measuring rod of the displacement sensor senses the position of the magnetic ring to determine displacement change of the slide assembly relative to the mounting assembly. In use of the device, the mounting assembly is mounted at the bottom of a clamp of the iron roughneck, and the device extends towards a station positioning position along with a jaw of the iron roughneck to realize pipe column recognition. In a process of extending of the device along with the iron roughneck and lifting, pipe column recognition and collar end face positioning are realized.

Description

technical field [0001] The invention relates to the field of petroleum machinery and equipment, in particular to a device and method for identifying an iron driller pipe string and locating a collar end face. Background technique [0002] Iron driller is a tool used for connecting and dismantling drill pipes, drill collars, tubing and other pipe strings in oil field drilling and workover operations. During the work of iron driller, a) the pipe string cannot be identified, Iron driller clamping torque and jaw clamping force cannot be set automatically. When using it, the user needs to find its performance parameters according to the target pipe diameter, and manually set the iron driller jaw clamping force and clamping torque, otherwise there will be Possibility of damage to the pipe string; b) The height of the end face of the pipe string coupling cannot be accurately positioned. It may be inconvenient for operators to observe, and requires the command of wellhead workers; ...

AI Technical Summary

Problems solved by technology

[0002] Iron driller is a tool used for connecting and dismantling drill pipes, drill collars, tubing and other pipe strings in oil field drilling and workover operations. During the work of iron driller, a) the pipe string cannot be identified, Iron driller clamping torque and jaw clamping force cannot be set automatically. When using it, the user needs to find its performance parameters according to the target pipe diameter, and manually set the iron driller jaw clamping force and clamping torque, otherwise there will be Possibility of damage to the pipe string; b) The height of the end face of the pipe string coupling cannot be accurately positioned. It may be inconvenient for operators to observe, and requires the command of wellhead workers; although the above methods can be used to control iron drillers, although their functional purposes can be achieved, there are also certain defects: (1) Manually set iron driller control parameters and adjustments Its height adapts to the end face of the pipe string coupling, which is inefficient and seriously affects the efficiency of the well site operation; (2) there is a possibility of safety accidents caused by improper operation of the user during the use of the iron driller; (3) the working height of the iron driller cannot Convenient and accurate positioning will cause the clamping position of the iron driller's jaw to deviate. If the clamping band of the jaw contains the wear-resistant belt of the pipe coupling, it will cause abnormal wear and tear such as the front teeth of the iron driller snapping off; (4) It is difficult to further improve the degree of automation of iron drillers, and it is almost impossible to achieve one-key operation of iron drillers

Images