Flow Diverter with Self-Actuating Piston for Drilling Fluid Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drilling fluid management systems lack a reliable mechanism to divert excess mud flow to prevent motor damage while ensuring adequate cuttings suspension, often requiring operator intervention and non-reversible flow control methods.
Innovation Solution
A flow diverter system comprising a housing with sub-members, a piston, and a spring that automatically adjusts to divert drilling fluid to the annulus when pressure exceeds a predetermined level, reverting to full flow when pressure decreases, using bypass ports and seals for fluid control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mud flow rate is increased to maintain cuttings suspension in the annulus, then cuttings removal efficiency is improved, but the mud motor may be damaged due to exceeding maximum flow rate
Solution Approach 1:
A flow diverter device is introduced as an intermediary component between the drill string and the annulus. This device includes a housing with a bypass port that can be selectively opened to divert a portion of the drilling fluid from the drill string to the annulus, enabling independent control of flow rates to protect the mud motor while maintaining adequate cuttings suspension
Solution Approach 2:
The drilling fluid flow is segmented into two separate paths: one path continues through the mud motor and drill bit for drilling operations, while the other path is diverted through the bypass port to the annulus for cuttings suspension. This segmentation allows each path to be optimized independently for its specific function
2Ease of operation
If a ball is pumped downhole to block the passage and shift flow control devices, then flow diversion can be achieved, but the tool cannot be returned to full flow and requires complex operator intervention
Solution Approach 1:
The flow diverter device is equipped with a self-actuating mechanism that automatically responds to pressure differential changes. When annulus pressure exceeds a predetermined threshold, the mechanism automatically opens the bypass port to divert flow; when pressure decreases, it automatically closes the bypass port to restore full flow through the mud motor, eliminating the need for operator intervention or complex reversible mechanisms
Solution Approach 2:
The device incorporates a feedback mechanism where the pressure differential between the drill string and annulus continuously monitors flow conditions and automatically adjusts the bypass port position accordingly, creating a self-regulating system that responds dynamically to changing well conditions
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
Enables reliable and controlled diversion of drilling fluid to prevent motor damage and maintain cuttings suspension, allowing for efficient operation across varying flow rates without operator complexity.
Implementation Method 1
a spring positioned in the first bore and surrounding the outer surface of the piston such that the spring is compressed between the first stop and the second stop
Implementation Method 2
When drilling fluid at a second predetermined pressure, greater than the first predetermined pressure, is passed through the flow diverter
Data Source
AI summary
A flow diverter is provided having a first sub member, a second sub member, a third sub member connected in series and a piston, a spring, and a sleeve member. The sleeve member is removeably disposed within the second sub member. The spring concentrically surrounds at least a portion of the piston and the spring are slidably disposed within the first sub member with the piston further slidably disposed within the second sub member and at least a portion of the third sub member. A drilling fluid having a first predetermined pressure passes through the flow diverter. The drilling fluid having a second predetermined pressure moves the piston until at least a portion of the drilling fluid passes through bypass ports formed in the piston, sleeve member, and second sub member and out of the flow diverter, thus controlling the pressure of the drilling fluid.