Engineering parameter measurement while drilling device of deep water drill string

Abstract

The invention provides an engineering parameter measurement while drilling device of a deep water drill string. The device comprises a top drive, a drill string body, a gauging nipple, a data transmission module and a data transmission module; the top drive is used for providing the drill string with driving force; the top of the gauging nipple is connected to the top drive, the bottom of the gauging nipple is connected to the drill string, and the gauging nipple is used for collecting an engineering parameter of the drill string in the well drilling process; the data transmission module is connected to the gauging nipple and the data transmission module, and is used for data communication between the gauging nipple and the data transmission module; the data transmission module is used for monitoring the engineering parameter of the drill string in real time and conducting real-time early warning and analysis treatment on a work state of the drill string.

Description

technical field [0001] The invention relates to the field of offshore oil and natural gas acquisition, in particular to an engineering parameter measuring device while drilling of a deep-water drill string which can monitor the state of the drill string in real time during the drilling process. Background technique [0002] The stress state of deepwater drill string is very complex and harsh. The upper part is subject to the random action of marine environmental loads such as wind, waves, currents and tides, and the joint action of platform movement, causing the drill string to be coupled with the riser; the lower bit is subject to the force of the formation and the contact force between the well wall and the drill string; , there is also a fluid-solid coupling force between the drilling fluid and the drill string, resulting in an extremely complex motion state of the drill string. The drill string usually produces complex movements in different forms such as offset (the ma...

AI Technical Summary

Problems solved by technology

Among them, the method of ground indirect collection is the most commonly used due to its low cost, but the accuracy is not enough

For example, the measurement of the drill string torque is mainly carried out on the wellhead device or the motor shaft, which cannot accurately measure the real torque of the drill string

For parameters such as the bending stress and displacement of the drill string, the method of ground indirect collection cannot be measured

The downhole direct acquisition method has the characteristics of high accuracy, but it is impossible to obtain the engineering parameters of the upper drill string which are seriously affected by the marine environmental load, and because the downhole measurement device has a harsh working environment and high service costs, it has not been widely used

Internationally, the StringSense system of National Oilwell Company can directly collect some drilling engineering parameters on the ground, including torque, tensile pressure, drilling speed, bending moment, internal pressure of the drill string and vibration parameters, etc. The motion parameter of - displacement

Since the deepwater drill string is connected to the drilling platform through the drill string heave motion compensator, the vertical displacement of the drill string is not synchronized with the vertical displacement of the drilling platform, so the movement of the drilling platform cannot represent the movement of the upper part of the deepwater drill string

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