Automated online monitor for drilling fluid lubricity

Abstract

The invention discloses an automated online monitor for drilling fluid lubricity, comprising a sealed sample chamber, a motor, a friction ring, a friction block, an assistor and a pressure measurementelement, a torque measurement element, a data acquisition box and a computer, wherein the sealed sample chamber is connected with a drilling fluid sample inlet and a drilling fluid sample outlet respectively; the motor is connected with a drive shaft, the drive shaft extends into the sealed sample chamber, the friction ring is connected to the lower end of the drive shaft; the torque measurementelement is arranged at the bottom of the inner cavity of the sealed sample chamber, the friction block is arranged at the upper end of the torque measurement element by a support, the friction block is located at the outer periphery of the friction ring, and a positive pressure measurement element is arranged on the friction block; the torque measurement element and the positive pressure measurement element are respectively connected with the data acquisition box by signal wires, and the data acquisition box is connected with the computer. Compared with the prior art, the instrument disclosedby the invention realizes automated online measurement of the drilling fluid lubricity, solves the problem of volatilization of drilling fluid, reduces the influence of the friction force of the system to the measurement result, and increases the measurement precision.

Description

technical field [0001] The invention belongs to the field of drilling fluid lubricity measuring equipment, and in particular relates to a lubricating instrument for automatic on-line measurement of drilling fluid lubricity, which is suitable for automatic on-line measurement of drilling fluid lubricity on site. Background technique [0002] The lubricity of drilling fluid is one of the important properties of drilling fluid. The quality of drilling fluid lubricity directly affects the friction between the drill string and the well wall, and affects the rotational torque of the drill string and the tripping resistance, friction When it is too large, it will often cause accidents such as pipe sticking, which will affect the normal progress of the drilling project. In recent years, with the development of drilling technology, especially the development of complex pressure layer adjustment wells and high-inclination directional wells, the lubricity of drilling fluid has been pai...

AI Technical Summary

Problems solved by technology

[0006] The invention provides an automatic on-line monitoring instrument for drilling fluid lubricity, the purpose of which is to realize automatic on-line measurement of drilling fluid lubricity, solve the problem of drilling fluid volatilization and reduce the influence of system friction on measurement results, thereby improving measurement accuracy

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