Drillpipe Gripping Device with Sealed Mud Circulation
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Solution Overview
Problem
Conventional drilling operations face inefficiencies during the insertion and removal of drillpipe elements due to pressure and vacuum forces within the wellbore, leading to potential well fracturing and kicking issues.
Innovation Solution
A pipe drive system with a gripping device that creates a seal to circulate drilling mud, regulated by a controller to manage fluid flow based on measured parameters, such as insertion speed and pressure, to reduce friction and buoyancy, thereby enhancing the efficiency of drillpipe handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drillpipe is inserted or removed quickly to improve efficiency, then productivity increases, but pressure or vacuum forces increase causing well fracturing or kicking
Solution Approach 1:
The system performs preliminary action by circulating drilling fluid through the drillpipe before insertion and continuing circulation during insertion/removal operations. This pre-established fluid flow creates a pressure balance that prevents vacuum forces and pressure surges, allowing faster drillpipe handling without compromising wellbore stability
Solution Approach 2:
The system maintains continuous drilling fluid circulation throughout the drillpipe insertion and removal process. The fluid flow continues uninterrupted, ensuring constant pressure balance and wellbore stability while enabling faster operational speeds. The gripping device maintains seal and fluid connection throughout the entire tripping operation
2Device complexity
If conventional gripping devices are used without fluid circulation, then device complexity is reduced, but wellbore pressure control and operational efficiency deteriorate
Solution Approach 1:
The system merges the gripping device with drilling fluid circulation capability by integrating a seal mechanism and fluid passage through the gripping device. This combination allows the same device to both grip the drillpipe and circulate fluid through it, eliminating the need for separate circulation equipment and actually reducing overall system complexity while dramatically improving productivity
Solution Approach 2:
The gripping device is designed with multi-functionality, serving both as a mechanical gripper and as a fluid circulation interface. The seal mechanism and internal passages enable the device to perform multiple functions (gripping, sealing, and fluid transfer) simultaneously, increasing operational efficiency without adding significant complexity
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 improves the speed and efficiency of drillpipe insertion and removal by controlling fluid circulation, reducing vacuum forces and pressure-related issues, thus stabilizing the wellbore conditions.
Implementation Method 1
creating a seal between the drillpipe handling equipment and the drillpipe element such that fluid can efficiently pass from the pipe drive system into the drillpipe element
Implementation Method 2
circulating drilling mud into the drill string and the wellbore during installation and/or removal of the drillpipe components
Implementation Method 3
The flow rate of the drilling mud may be regulated by the controller based on measured feedback from one or more sensors
Data Source
AI summary
Present embodiments are directed to a control system including a controller configured to regulate a drilling fluid flow through a pipe element during installation of the pipe element into a wellbore or removal of the pipe element from the wellbore, wherein the controller is configured to regulate the drilling fluid flow based on feedback from one or more sensors of the control system.