Integrated Sidetracking Tool Reduces Well Drilling Trip Time
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Solution Overview
Problem
Traditional methods for drilling deviated secondary boreholes from existing boreholes require multiple trips, leading to increased drilling costs and delays due to the need for separate trips to orient and set whipstocks and drill bits.
Innovation Solution
A one-trip sidetracking tool with an expandable anchor, a whipstock having a ramp face, and a drilling assembly with a drill bit that can be secured in the borehole using an expandable anchor and shear screws, allowing the drill bit to deviate radially and drill a deviated hole in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional whipstock methods are used for sidetracking, then the drilling operation can be performed with conventional equipment, but multiple trips are required leading to increased time and cost
Solution Approach 1:
The patent combines the whipstock orientation function and the drilling function into a single integrated tool assembly. The whipstock is integrated with a drill bit, allowing both the sidetrack orientation and the drilling operation to be performed in one trip, eliminating the need for separate trips to set the whipstock and then drill.
Solution Approach 2:
The tool assembly serves multiple functions: it acts as both a whipstock for orienting the deviated borehole and as a drilling assembly for creating the secondary borehole. This multi-functional design allows a single tool to accomplish what traditionally required separate operations and equipment.
2Reliability
If multiple trips are made for sidetracking operations, then each operation can be performed carefully and accurately, but drilling costs increase and delays occur
Solution Approach 1:
By merging the whipstock and drill bit into a single integrated assembly, the patent eliminates the need for multiple trips while maintaining operational accuracy. The integrated design ensures that the whipstock orientation and drilling operations are coordinated, preserving reliability while reducing costs associated with multiple trips.
3Ease of manufacture
If conventional drill bits are used in sidetracking, then the drill bit design can be optimized for formation drilling, but the complex whipstock setup requires multiple trips
Solution Approach 1:
The patent merges the whipstock assembly with the drill bit into a single integrated tool. This combination simplifies the overall operation by eliminating the need for separate whipstock setting trips, while still allowing the use of conventional drill bit designs optimized for specific formations.
Solution Approach 2:
The integrated tool assembly performs multiple functions: it provides the whipstock ramp for deflecting the drill string and simultaneously houses the drill bit for formation drilling. This multi-functionality reduces device complexity in terms of operational steps while maintaining the specialized capabilities of conventional drill bits.
Data Source
AI summary
A sidetracking tool includes a setting tool having an expandable anchor, a whipstock connected to an upper end of the setting tool, the whipstock having a ramp face along an axial length thereof, and a drilling assembly including a drill bit disposed on an end thereof, wherein the drill bit is configured to interface with the ramp face of the whipstock.