Tube-and-Shell Drilling Mud Cooling for Plugging Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional drilling mud cooling systems are inefficient and costly, with high maintenance requirements due to plugging issues and inadequate heat removal, leading to equipment damage and increased operational costs.
Innovation Solution
A system comprising a heat-exchanger apparatus with a tube-and-shell heat exchanger and a variable frequency drive (VFD) for an electrically driven mud pump, which draws drilling mud from the last active volume mud tank, cools it, and returns it to the same tank, optimizing the pumping rate to enhance efficiency and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling systems are used to remove heat from drilling mud, then heat removal is achieved, but equipment plugging occurs and maintenance costs increase
Solution Approach 1:
The patent extracts and removes solid cuttings from the drilling mud before the mud enters the heat exchanger. This is achieved through solid control equipment that separates cuttings from the mud stream, preventing the cuttings from causing plugging in the cooling system while still allowing the mud to be cooled effectively.
Solution Approach 2:
The patent performs preliminary separation of cuttings from drilling mud before the mud enters the heat exchanger. By removing solids in advance through settling tanks and shale shakers, the system prevents plugging issues before they occur, ensuring reliable continuous operation of the cooling equipment.
2Temperature
If drilling mud is circulated through heat exchanger to cool it, then heat removal is achieved, but system complexity and maintenance requirements increase
Solution Approach 1:
The patent merges the cooling function with the existing drilling mud circulation system. The heat exchanger is integrated into the mud loop, and cooling is achieved by utilizing the existing pump and circulation infrastructure, rather than creating a separate complex cooling system.
Solution Approach 2:
The system uses the drilling mud's own circulation to achieve cooling. The mud is pumped through the heat exchanger using the existing mud pumps already part of the drilling operation, eliminating the need for separate cooling pumps or complex auxiliary systems.
3Productivity
If rapid cooling of drilling mud is implemented, then heat removal speed increases, but energy consumption increases
Solution Approach 1:
The patent optimizes the cooling process by controlling flow rates and heat exchanger parameters to achieve efficient heat transfer. By adjusting the mud flow rate through the heat exchanger and optimizing the heat transfer surface area, the system achieves effective cooling with minimal energy input.
Solution Approach 2:
The cooling process operates continuously as part of the drilling mud circulation loop. The heat exchanger is constantly removing heat from the mud as it circulates, maintaining optimal temperature without requiring intermittent high-energy cooling cycles.
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 system effectively reduces equipment downtime, lowers maintenance costs, and achieves more efficient heat removal with less energy, ensuring the drilling mud is cooled to an optimal temperature for reuse, thereby reducing rubber damage and improving rig operating efficiency.
Implementation Method 1
a heat exchanger for removing at least some of the heat from the drilling mud when the drilling mud is pumped through the heat exchanger
Data Source
AI summary
Systems and methods are provided for cooling a drilling mud in a drilling operation. In aspects, the disclosure includes drawing the drilling mud from a last active volume mud tank of a plurality of active volume mud tanks and conducting the drilling mud to a heat-exchanger apparatus and then returning the drilling mud to the last active volume mud tank. In other aspects, the disclosure includes a variable frequency drive (“VFD”) for controlling a pumping rate of an electrically driven pump for the drilling mud, wherein the VFD is capable of adjusting the pumping rate for pumping of the drilling mud through a heat-exchanger apparatus. In further aspects, systems and methods are provided that use a tube-and-shell heat exchanger. The aspects are independently capable of providing improved efficiency. These and other aspects are preferably used in combination for greater efficiency.