Method, device and equipment for determining stress condition of tubular column

Abstract

The embodiment of the invention provides a method, device and equipment for determining the stress condition of a tubular column. The method comprises steps of obtaining friction coefficients of a target well at a plurality of moments before a target moment; obtaining a first drilling data set of the target well; determining a hook load and a turntable torque of the target well at the target moment according to the friction coefficients at multiple moments before the target moment, the first drilling data set and a first prediction model; and based on the hook load and the turntable torque atthe target moment and the friction coefficient at the moment before the target moment, determining the stress condition of the tubular column in the target well at the target moment. In the embodimentof the invention, the stress condition of the tubular column in the target well at the target moment can be accurately determined at the previous moment of the target moment, and then early warning analysis can be carried out on drilling abnormal conditions such as jamming of a drilling tool at the target moment at the previous moment of the target moment so that safe and efficient drilling is guaranteed.

Description

technical field [0001] The embodiments of this specification relate to the technical field of geological exploration, and in particular to a method, device and equipment for determining the stress of a pipe string. Background technique [0002] With the advancement of oil and gas exploration and development toward deep and complex formations, the working conditions of drilling tools are harsh, the force of drilling strings is complicated, the frictional torque increases sharply, and drilling sticking accidents occur frequently, which in turn leads to a decrease in drilling efficiency. Therefore, it is very important to determine the force of the downhole pipe string at the next moment in time, which can avoid the risk of drilling sticking, increase the ROP, and ensure safe and efficient drilling. [0003] In the prior art, the theoretical analysis of the pipe string mechanics is usually used to establish the overall stress model of the pipe string, so that the current fricti...

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Problems solved by technology

[0005] The embodiment of this specification provides a method, device and equipment for determining the force of the pipe string, so as to solve the problem in the prior art that the force of the downhole pipe string at the next moment cannot be accurately determined at the current moment

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