Simulation method and system for rotating speed of drill pipe in tripping-in process of deepwater guide pipe

Abstract

The invention discloses a simulation method and system for the rotating speed of a drill pipe in the tripping-in process of a deepwater guide pipe. The simulation method comprises the steps that layered soil bodies for experimental use are configured in a soil box according to soil body distribution of a target sea-bed area, a predetermined experimental condition is maintained, and the rotating speed of a motor in an injection and tripping-in device is adjusted for many times, so that the rotating speed of the drill pipe is adjusted; reference signals are collected through a multichannel data collector which electrically communicates with a pressure sensor, a tension sensor, a displacement sensor and a jet pump, and the reference signals comprise a pressure signal, a tension signal and a displacement signal; and according to the collected reference signals, a target drill pipe rotating speed in the tripping-in process of the deepwater guide pipe under the predetermined experimental condition is selected. According to the simulation method and system for the rotating speed of the drill pipe in the tripping-in process of the deepwater guide pipe, indoor experimental simulation and evaluation can be conducted on the rotating speed of the drill pipe in the tripping-in process of the deepwater guide pipe.

Description

technical field [0001] The invention relates to the technical field of conduit jetting running in deepwater drilling, in particular to a method and system for simulating the rotational speed of a drill pipe during deepwater conduit running. Background technique [0002] In the offshore engineering oil and gas drilling industry, the technology of jetting into the conduit has become a widely used technology because it can save the time of drilling operations and reduce the risk and cost of drilling. Furthermore, a deep water jet conduit suction technology is specially designed for the development of oil and gas fields in deep water areas, which is a new technology developed on the basis of jet drilling and mud motor applications. When this technology is implemented, the drill bit and the mud motor are run through the conduit into the special tool and the conduit together to form a string of jet running strings, referred to as the drill string. Among them, the main function of...

AI Technical Summary

Problems solved by technology

On the one hand, if the design depth of the conduit is too large, it will cause economic waste, and even cause the conduit to fail to go in, and the surface line of the exposed mud at the wellhead on the seabed is too high, resulting in the wellbore being scrapped; on the other hand, if the conduit is If the designed run-in depth is too small, it may cause safety accidents such as insufficient bearing capacity of the catheter string, subsidence and instability of the wellhead, and also cause huge economic waste

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