Offshore Drill Device Chain Winding Prevention
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Solution Overview
Problem
Existing drill devices for excavating sea beds to install mooring devices face issues with the chain becoming wound around the driving pipe during rotation, hindering excavation and reducing the fixing force of the mooring device.
Innovation Solution
A drill device design that includes a pile, a driving pipe inserted into the sea bed through a through hole, and a chain inserted with the driving pipe, where the driving pipe is coupled to a coupler on the drill bit and the chain is connected to a bearing to prevent winding and enhance fixing force, allowing radial excavation and firm anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the chain is connected to the drill bit and lowered to the sea floor, then the chain can be inserted into the sea bed with the driving pipe, but the chain becomes wound around the driving pipe connection during excavation
Solution Approach 1:
The patent extracts the chain from the drilling operation by guiding it through a dedicated guide groove in the driving pipe, separating the chain's path from the driving pipe's rotation path. This allows the chain to be inserted into the sea bed without being wound around the driving pipe during excavation operations.
Solution Approach 2:
The guide groove acts as an intermediary structure that mediates between the chain and the driving pipe. It provides a controlled path for the chain to follow, preventing direct contact and winding around the rotating driving pipe while still allowing the chain to be inserted into the sea bed alongside the driving pipe.
2Reliability
If the chain is wound around the driving pipe, then the chain may be pulled in during rotation, but this hinders excavation and reduces fixing force
Solution Approach 1:
The patent extracts the chain from the drilling operation by guiding it through a dedicated guide groove in the driving pipe, separating the chain's path from the driving pipe's rotation path. This allows the chain to be inserted into the sea bed without being wound around the driving pipe during excavation operations.
Solution Approach 2:
The driving pipe is segmented with a guide groove that creates a separate channel for the chain. This segmentation divides the driving pipe's function into two independent paths: one for rotation and excavation, and another for chain insertion, allowing both operations to proceed simultaneously without interference.
3Reliability
If the chain is inserted radially into the sea bed, then the fixing force is increased, but the chain must be prevented from winding during the insertion process
Solution Approach 1:
The patent applies local quality by adding a guide groove only in the specific region where the chain needs to be guided. This localized structural modification provides the necessary chain guidance functionality without complicating the overall driving pipe design, enabling radial chain insertion while maintaining simplicity.
Solution Approach 2:
The driving pipe is segmented with a guide groove that creates a separate channel for the chain. This segmentation divides the driving pipe's function into two independent paths: one for rotation and excavation, and another for chain insertion, allowing both operations to proceed simultaneously without interference.
Data Source
AI summary
A drill device comprising: a pile configured such that same descends to a seafloor surface through a mooring installation device provided in a ship, and a part of the body thereof is fixed in an area of the seafloor surface as the upper surface thereof is pressurized in the vertical direction; a driving pipe configured such that same descends to the seafloor surface through a through-hole formed in the pile, the body thereof is inserted into a seafloor foundation, and same is recovered through the through-hole after excavation is completed; a chain, one end of which is fixed to one side of the pile, and the other end of which is introduced through the through-hole such that same is inserted into the seafloor foundation together with the driving pipe; and a drill bit unit.