Well cementing rubber plug dynamic tracking indication system and method

Abstract

The invention belongs to the technical field of well cementing, and discloses a well cementing rubber plug dynamic tracking indication system and method. The system comprises a marking retainer ring, a well pressure unit, a displacement sensor, a data AD acquisition card, a computer and human-computer interaction interface software. A rubber plug passes the marking retainer ring, the well pressure unit is used for measuring pressure after the rubber plug passes the marking retainer ring, the displacement sensor is connected with the well pressure unit and used for measuring displacement, the data AD acquisition card is connected with the displacement sensor and used for acquiring data, the computer is connected with the data AD acquisition card and used for recording the software, and the human-computer interaction interface software is connected with the computer and used for real-time dynamic display. Whole-course real-time visual animation display can be realized by a quite inexpensive scheme, marking positions are accurate, the position of the well cementing rubber plug is fitted by a formula before marking, the fitting formula is calibrated after marking, particles smaller than 5mm are generated by a pressure lift drag structure in a one-step damaged manner, the drift diameter of the marking retainer ring is unchanged after the rubber plug passes the marking retainer ring, and subsequent construction cannot be affected.

Description

technical field [0001] The invention belongs to the technical field of well cementing, and in particular relates to a dynamic tracking and indicating system and method for a cementing rubber plug. Background technique [0002] During the cementing process, it is often necessary to use external instruments to determine the position of the fixed rubber plug, so as to facilitate the smooth execution of the cementing command process. However, the determination of the position of the existing cementing plug needs to estimate the position of the plug through the calculation of the displacement, and cooperate with the pressure gauge to make the impact judgment, which cannot be directly visualized and dynamically indicated; before the end of the impact, due to the fluctuation of the pump truck Factors such as stagnant mud in the manifold and low sensor accuracy lead to uncertainty in the position of the cementing plug, which increases the difficulty and risk of cementing command. ...

AI Technical Summary

Problems solved by technology

[0006] a. Through the manual judgment of the three-parameter instrument, due to the uneven quality of the operators, it leads to misjudgment or inaccurate judgment

[0007] b. The existing ultrasonic signal marker scheme has high precision, but there are problems such as cost, transmission power, attenuation in mud environment, etc., and the technical difficulty is relatively high

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