Composite Drill Gun Remnant Removal
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Solution Overview
Problem
Existing drill guns in oilfield operations leave remnants that are difficult to remove after detonation, hindering further use of the wellbore and requiring additional procedures for removal.
Innovation Solution
A composite drill gun with a detonation housing and encapsulated charges within a composite carrier, where the detonation source is sealed from the wellbore environment, allowing for easy removal of the entire assembly by drilling after detonation, and enabling operations up to 5,000 PSI and 250° F.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional drill guns are used, then detonation function is achieved, but removal of remnants becomes difficult
Solution Approach 1:
The drill gun is constructed using composite materials that are specifically designed to be easily drilled after detonation. The carrier and housing are made from composite materials with properties that allow for rapid drill-up operations, resolving the contradiction between achieving detonation function and enabling easy removal of remnants.
Solution Approach 2:
The patent changes the material parameters of the drill gun components to optimize for post-detonation removal. By selecting composite materials with specific physical and mechanical properties, the drill gun achieves both functional performance and ease of removal, eliminating the need for complex removal procedures.
2Productivity
If drill gun remnants remain in wellbore, then wellbore integrity is maintained, but further use of wellbore is hindered
Solution Approach 1:
The drill gun is designed as a disposable component that is intentionally left in the wellbore after detonation. The composite material construction allows for rapid drill-up operations, making the temporary presence of the drill gun acceptable given the speed of removal and the value of wellbore integrity during operation.
Solution Approach 2:
The drill gun is pre-designed with removable characteristics built into its construction. The composite material selection and structural design anticipate the need for removal and facilitate it through optimized material properties, eliminating the need for complex removal procedures and reducing time loss.
3Ease of manufacture
If composite materials are used, then ease of removal is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite materials that balance manufacturing feasibility with post-detonation removability. The composite construction, while more complex than traditional materials, provides superior removal characteristics and is justified by the operational benefits and reduced time loss.
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 efficient perforation and cement squeeze operations in a single trip, facilitates easy removal of drill gun remnants, and reduces operator and rig time by allowing speedy drill-up procedures, enhancing wellbore accessibility for future use.
Implementation Method 1
a detonation train connecting the detonation source to the encapsulated charges
Implementation Method 2
enabling operations up to 5,000 PSI and 250° F
Data Source
AI summary
A composite drill gun for use in a wellbore environment can include a detonation housing containing a detonation source, a composite carrier containing one or more encapsulated charges, and a detonation train connecting the detonation source to the encapsulated charges. The detonation source and each individual encapsulated charge are all sealed with respect to the wellbore environment, and thus the carrier need not be sealed with respect to the wellbore environment. The carrier can be made out of composite materials without worry of leaks into the interior of the carrier, as the detonation source and encapsulated charges are all sealed with respect to the wellbore environment. The composite carrier can be easily drilled out of the wellbore after detonation.