Drop-Down Pipe Cutter for Single-Trip Sidetrack Drilling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Drill strings often get stuck in wellbores, necessitating labor-intensive and time-consuming sidetrack wellbore drilling, which involves multiple trips and tool conveyances.

Innovation Solution

Deploy an untethered cutting tool with a locking unit and cutting elements to sever the stuck drill string, followed by integrating a sidetrack tool like a whipstock, whipstock latch, or cement plug cup to facilitate lateral drilling of a sidetrack wellbore.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional sidetrack wellbore drilling is performed with multiple tool conveyances, then the sidetrack wellbore can be formed, but the operation becomes labor-intensive and time-consuming

Engineering Contradiction:

Improvesidetrack drilling efficiencyVSAvoidoperational time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent combines the cutting tool and sidetrack tool into a single integrated assembly that can be deployed in one conveyance operation. The cutting tool severing mechanism and the whipstock/sidetrack tool are merged into one unit, eliminating the need for separate tool conveyances and reducing operational time while maintaining the ability to form a sidetrack wellbore efficiently

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If multiple tool conveyances are used to initiate a side-track wellbore, then the drilling can proceed, but the process becomes labor-intensive

Engineering Contradiction:

Improveoperational simplicityVSAvoidtool conveyance complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

By merging the cutting tool and sidetrack tool into a single integrated assembly, the patent reduces the number of separate tool conveyances needed from multiple operations to a single deployment. This simplifies the operational process while the integrated design manages the device complexity through unified construction

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If the drill string is severed to continue drilling, then drilling can resume, but the drill string must be withdrawn and reinstalled

Engineering Contradiction:

Improvedrilling continuityVSAvoidtrip time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The cutting tool is deployed in advance to sever the drill string at the appropriate location before the sidetrack drilling begins. This preliminary cutting action allows the upper portion to be withdrawn and replaced with the sidetrack assembly without requiring multiple trips, as the cutting is completed beforehand

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The integration of the cutting tool and sidetrack tool into one assembly allows the cutting operation and sidetrack initiation to be combined in a single operational sequence, eliminating the need for separate cutting and sidetrack deployment trips

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12435591B1Rapid side-track operations with a drop-down pipe cutter

Publication Date: 2025.10.07 SAUDI ARABIAN OIL CO

AI summary

A wellbore system includes a drill string extending into a main wellbore and an untethered cutting tool disposed within the drill string. The untethered cutting tool includes at least one cutting element operable to sever the drill string such that an upper portion of the drill string may be withdrawn from the wellbore. A sidetrack tool is integrally coupled to an upper end of the untethered cutting tool. The sidetrack tool may include at least one of a whipstock, a whipstock latch, and a cement plug cup. The sidetrack tool may facilitate drilling a sidetrack wellbore by limiting the number of trips into the main wellbore.