Rock Chip Bed Impact Simulation in Large Displacement Wells
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Solution Overview
Problem
Current simulation devices for rock chip beds in large displacement wells are scaled down and lack realism, failing to accurately demonstrate the formation and impact of rock chip beds on drill pipe torque and equivalent cyclic density (ECD), and only consider single impact factors, leading to inadequate simulation of downhole accidents.
Innovation Solution
An impact simulation device and method that includes a wellbore system, drilling fluid circulation, rock chip transportation, drill pipe control, and data acquisition systems to simulate the horizontal annulus environment, allowing for the continuous addition and control of rock chips, and adjustment of displacement and rotational speed to study the impact of rock chip beds on ECD and torque under various conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the experiment device is scaled down according to actual scale, then the device size is reduced, but the simulation accuracy of rock chip bed formation and impact is compromised
Solution Approach 1:
The patent creates a full-scale copy of the horizontal annulus environment rather than using a scaled-down model. The simulated wellbore system replicates actual drilling dimensions and rock chip bed formation conditions at full scale, ensuring that the physics and hydraulics remain representative of real-world conditions while maintaining manageable device dimensions through controlled environment design.
2Device complexity
If only single impact factors are considered, then the simulation complexity is reduced, but the comprehensiveness of downhole accident simulation is insufficient
Solution Approach 1:
The simulation device is designed with multi-functionality to study multiple impact factors simultaneously. The system can independently and combinedly investigate the effects of rock chip bed thickness, drilling fluid properties, wellbore geometry, and operational parameters on ECD and torque, making it a universal platform for comprehensive downhole accident analysis rather than a single-purpose apparatus.
3Ease of manufacture
If the axial distribution of rock chips is not uniform, then the rock chip bed formation is simplified, but the applicability to study the impact of rock chip bed thickness on ECD and friction torque is reduced
Solution Approach 1:
The system employs dynamic control of rock chip distribution through adjustable feeding mechanisms and drilling fluid flow rates. The rock chip injection system can dynamically adjust the quantity, size, and axial distribution of rock chips to create uniform or non-uniform beds according to different simulation scenarios, enabling reliable study of thickness effects on ECD and torque while maintaining ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The simulation device effectively reduces the probability of downhole accidents by accurately simulating the impact of rock chip beds on ECD and drill pipe torque, enabling early identification and correction of rock chip bed formations, thus improving drilling safety and efficiency.
Implementation Method 1
The drilling fluid circulation system is configured to provide drilling fluid to the wellbore system and collect flow data of the drilling fluid
Implementation Method 2
the formation of the rock chip bed may lead to a relatively large friction on the drill pipe as the rock chip bed passes through the bottom of the well, which may lead to an increased torque on the drill pipe
Implementation Method 3
the formation of the rock chip bed may lead to the formation of a certain pressure of drilling fluid around the borehole, which increases the ECD
Data Source
AI summary
The present disclosure provides an impact simulation device and simulation method for characteristics of a rock chip bed in a large displacement well. The device comprises a wellbore system, a drilling fluid circulation system, a rock chip transportation system, a drill pipe control system, a data acquisition system, and a data processing system. The wellbore system is configured to simulate a horizontal annulus environment for rock chip transportation during drilling. The drilling fluid circulation system is configured to provide drilling fluid to the wellbore system and collect flow data of the drilling fluid. The rock chip transportation system is configured to simulate an output of rock chips in the horizontal annulus environment during drilling and recover the rock chips. The drill pipe control system is configured to implement drilling simulation in the wellbore system. The data acquisition system is configured to collect monitoring data during the drilling simulation and to transmit the monitoring data to the data processing system. The data processing system is configured to determine ECD correction parameters based on the monitoring data.