Sucker rod mechanical parameter measurement device

Abstract

The invention belongs to the technical field of measurement and testing, and relates to a sucker rod mechanical parameter measurement device. The sucker rod mechanical parameter measurement device is composed of a long connector cabin, a short connector, a dual-ring sealing piece, a stress concentration filtering piece and a micro electric measurement and control system, wherein the dual-ring sealing piece is arranged in a long connector cabin sealing groove in a sleeved mode, the micro electric measurement and control system is placed in the cavity of the long connector cabin sealing groove, strain gauges are attached around a wire hole in the outer wall of the long connector cabin in the peripheral direction in a surrounding mode, and accordingly a bridge circuit measuring axial force and bending moment is formed. The stress concentration filtering piece is connected with the long connector cabin in a sleeved mode, high temperature-resistant strain gauges are attached to the inner wall of the drum-shaped portion of the stress concentration filtering piece, and accordingly a radial-force bridge measurement circuit is formed. The sucker rod mechanical parameter measurement device is simple in structure and good in main technical index; the maximum withstand voltage is 40MPa, the radial pressure measuring range is between 4N and 100KN, the axial force ranges from 35N to 1200KN, and the torque ranges from 50N*M to 400N*M; the sucker rod mechanical parameter measurement device can stably work under the condition with the temperature lower than 130 DEG C, the vibration frequency smaller than 1000HZ and large amplitudes.

Description

technical field [0001] The invention belongs to the technical field of metering and testing, and relates to a device for measuring the stress state of downhole sucker rods. Background technique [0002] There are two main methods of oil recovery in the oil recovery industry: rod recovery and rodless recovery. Among them, rod recovery is the most widely used traditional mechanical oil recovery method, and it has been dominant in oil recovery engineering so far. According to statistics, the proportion of rod production wells in mechanical production wells is more than 90%. The flexible and slender sucker rod is a key component in the rod oil production system. It connects the ground beam drive system and the oil well pump at a depth of thousands to thousands of meters, and is responsible for the transmission of motion and energy. Various factors such as the special composition of the sucker rod, the complex wellbore trajectory, the sliding friction between the tubing and the ...

AI Technical Summary

Problems solved by technology

[0006] 1. The purpose of the present invention is to provide a method for solving problems such as rod breakage, rod detachment, rod eccentric wear and tube eccentric wear caused by the continuous change of the force on the sucker rod under complex working conditions. A measuring device capable of measuring the mechanical properties of downhole sucker rods, providing data support for sucker rod failure prediction

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