System and method for monitoring seizure and stuck failure of drill rod of rotary drilling rig

Abstract

The invention discloses a system and a method for monitoring the seizure and stuck failure of a drill rod of a rotary drilling rig. The system comprises a first displacement sensor, a second displacement sensor, a third displacement sensor and a programmable logic controller (PLC), wherein the first displacement sensor monitors the first displacement of a drill relative to the ground; the second displacement sensor monitors the second displacement of a power head relative to the ground; the third displacement sensor monitors the actual deformation of an upper tray buffer spring of the power head; and the PLC acquires the total extending length of the drill rod according to the received first displacement and second displacement, acquires the weight of the drill rod with the total extending length according to the total extending length of the drill rod and the length and weight of each section in the drill rod, acquires the set deformation of the upper tray buffer spring according to the weight of the drill rod with the total extending length and the elasticity coefficient of the upper tray buffer spring, compares the set deformation with the received actual deformation, outputs a seizure alarm trigger signal when the actual deformation is smaller than the set deformation, and outputs a stuck alarm trigger signal when the actual deformation is greater than the set deformation, so that the seizure and stuck failure of the drill rod of the rotary drilling rig is monitored.

Description

technical field [0001] The invention relates to a rotary drilling rig, in particular to a monitoring system and method for a drill rod of the rotary drilling rig with a rod stuck. Background technique [0002] The drill pipe of a rotary drilling rig is usually a telescopic rod. Taking the four-section structure as an example, the outermost layer is the first section, the second outer layer is the second section, the innermost layer is the third section, and the innermost layer is the second section. four quarters. However, in the construction process, if a fault with the rod occurs due to improper operation or other reasons, if the fault with the rod is not handled properly, it will develop into a stuck rod fault (that is, two adjacent sections of drill pipe are stuck together and mutually between rotation and axial sliding). Taking the drill pipe shrinking process as an example, when the drill is lifted at the end of drilling, the main hoisting wire rope of the rotary dri...

AI Technical Summary

Problems solved by technology

However, in the construction process, if a fault with the rod occurs due to improper operation or other reasons, if the fault with the rod is not handled properly, it will develop into a stuck rod fault (that is, two adjacent sections of drill pipe are stuck together and mutually Cannot rotate and axially slide between)

Taking the drill pipe shrinking process as an example, when the drill is lifted at the end of drilling, the main hoisting wire rope of the rotary drilling rig is lifted, and the fourth section of the drill pipe is lifted upward together with the drilling tool, and at the same time, the fourth section is lifted toward the third section of the drill pipe. Indentation within the section, when the lifted fourth section is completely retracted into the third section, the upper tray buffer spring of the power head installed on the fourth section will hold up the third section and bring the third section upward together Lifting, while the third section retracts into the second section of the drill pipe, and so on until the fourth section, the third section and the second section are all completely retracted into the first section, so if in the process, there is a belt Rod or jammed rod failure, which can further lead to serious rod smashing events and damage the drill pipe and power head

[0003] However, none of the current rotary drilling rigs is equipped with equipment or systems that can monitor the drill rods of the rotary drilling rig, so that faults can be detected in time and processed in time

Images