Non-explosive Casing Perforation Using Well Fluid Pressure

Solution Overview

Problem

Current methods for creating perforations in well casings using explosives pose safety and regulatory concerns, and mechanical alternatives are slow due to the need for surface power.

Innovation Solution

A non-explosive punch system utilizing hydrostatic pressure from well fluids to actuate punch elements, eliminating the need for surface power and explosive materials, with a housing containing punch elements, an actuating device, and an energy supply device that harnesses well fluid pressure to perforate the casing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If explosive materials are used to create perforations in casing, then the perforation process is fast and effective, but safety risks and regulatory issues increase

Engineering Contradiction:

Improveperforation speedVSAvoidsafety risks

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the chemical energy system (explosives) with a mechanical energy system (hydrostatic pressure-driven punch mechanism). The punch element is actuated by hydraulic pressure from well fluids to mechanically penetrate the casing, eliminating the need for explosive materials while maintaining perforation effectiveness and improving safety.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention uses hydraulic pressure from well fluids to actuate the punch element through a piston-cylinder mechanism. The hydrostatic pressure drives the piston, which in turn moves the punch element to perforate the casing, providing a safe and effective alternative to explosives.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Object-affected harmful factors

If mechanical punching methods are used to create perforations, then safety risks are reduced, but the process becomes slow due to requiring surface power

Engineering Contradiction:

Improvesafety risksVSAvoidperforation speed

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The system uses the well's own hydrostatic pressure to actuate the punch mechanism, eliminating the need for external power sources from the surface. The well fluid pressure itself provides the energy needed to drive the punch element, making the system self-sufficient and eliminating the speed limitation imposed by surface power requirements.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention utilizes hydraulic pressure from well fluids to actuate the punch element through a piston-cylinder mechanism. The hydrostatic pressure drives the piston, which in turn moves the punch element to perforate the casing, providing a safe and effective alternative to explosives.

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Reliability

If explosive materials are used for perforation, then perforation effectiveness is achieved, but equipment costs and regulatory compliance costs increase

Engineering Contradiction:

Improveperforation effectivenessVSAvoidequipment costs

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the chemical energy system (explosives) with a mechanical energy system (hydrostatic pressure-driven punch mechanism). The punch element is actuated by hydraulic pressure from well fluids to mechanically penetrate the casing, eliminating the need for explosive materials while maintaining perforation effectiveness and improving safety.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system uses the well's own hydrostatic pressure to actuate the punch mechanism, eliminating the need for external power sources from the surface. The well fluid pressure itself provides the energy needed to drive the punch element, making the system self-sufficient and eliminating the speed limitation imposed by surface power requirements.

Inventive Principle:

Principle #25Self-service

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 fast and safe perforation of well casings without surface power or explosives, effectively connecting the wellbore to subterranean formations for oil and gas extraction, reducing equipment costs and regulatory risks.

Implementation Method 1

an energy supply device located within the housing and configured to use a pressure of a well fluid present in the casing, to actuate the actuating device

Methodology Applied

Scientific EffectHydrostatic pressure: Pressure Increase

Data Source

PatentUS11898424B2Non-explosive casing perforating devices and methods

Publication Date: 2024.02.13 GEODYNAMICS INC

AI summary

A non-explosive punch system for making perforations in a casing includes a housing and one or more punch elements configured to extend through a wall of the housing to perforate a casing of the well. An actuating device is located within the housing and may comprise a piston and an actuator block configured to actuate the one or more punch elements. An energy supply device is also located within the housing and may comprise a valve to direct fluid flow and a piston configured to use a pressure of a well fluid present in the casing, to actuate the actuating device. No explosive material is present in the punch system.