Downhole Running Tool Hydraulic Control Isolation
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Solution Overview
Problem
The hydraulic control systems and flowpaths in well completion assemblies are vulnerable to damage from ambient wellbore fluids and temperature gradients during run-in operations, leading to pressure variations that can cause further damage.
Innovation Solution
A downhole running tool with a body featuring an annulus, a latch member, a reset member, and a conduit with pressure relief and flow ports, which isolates the hydraulic control system from external pressures and fluids, using shear pins and pressure-sensitive components to manage pressure and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hydraulic control system is exposed to ambient wellbore fluids during run-in operations, then the installation process is simplified, but the hydraulic control system is damaged by fluid contamination
Solution Approach 1:
A protection mechanism is installed in advance on the running tool to shield the hydraulic control system from ambient fluids during run-in operations. This preliminary protective action allows the system to be installed without exposure to damaging fluids, and the protection is subsequently removed after installation completes
2Ease of operation
If the hydraulic control system is exposed to temperature gradients during run-in operations, then the installation process is simplified, but pressure variations damage the hydraulic control system
Solution Approach 1:
A protection mechanism is installed in advance on the running tool to shield the hydraulic control system from temperature gradients and resulting pressure variations during run-in operations. This preliminary protective action prevents pressure damage before it occurs, allowing simplified installation without exposing the system to harmful thermal stress
3Reliability
If the hydraulic control system is isolated from ambient fluids using a protection mechanism, then the hydraulic control system is protected from contamination, but the device complexity increases
Solution Approach 1:
The protection mechanism is nested within the running tool structure, with the hydraulic control system positioned inside the protected zone created by the running tool. This nesting arrangement provides protection without requiring a completely separate external system, thereby limiting the increase in overall device complexity
Data Source
AI summary
Systems and methods for downhole completions. A downhole running tool can have a body having a bore formed therethrough. A latch member can be disposed on a first portion of the body. A reset member can be disposed on a second portion of the body. A conduit can be formed within a sidewall of the body. The conduit can be located between the first and second portions of the body. A pressure relief port can be disposed at a first end of the conduit; and a first flow port can be disposed at a second end of the conduit. The pressure relief port and first flow port can be in communication with an outer diameter of the body.