Fibre Spooling Housing With Isolating Fluid for Bore Deployment
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Solution Overview
Problem
Optical fibers are susceptible to damage from bore fluids, particularly drilling mud containing ground barium powder, during deployment in wellbores, which can hinder the deployment process and cause structural integrity issues.
Innovation Solution
An apparatus with a housing that includes a spool cavity filled with an isolating fluid, allowing the spool of elongate medium to be partially or fully immersed, isolating it from bore fluids, and featuring a mechanism to maintain a non-contact relationship with incoming bore fluids, ensuring the spool cavity is filled with isolating fluid or gas to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical fiber is deployed directly in the bore without isolation, then the deployment process is simple and fast, but the optical fiber is damaged by bore fluids containing ground barium powder
Solution Approach 1:
The patent introduces an isolating fluid as an intermediary substance between the optical fiber and the bore fluid. This isolating fluid fills the spool cavity and prevents direct contact between the bore fluid (containing ground barium powder) and the optical fiber, thereby protecting the fiber from damage while allowing the deployment process to continue
Solution Approach 2:
The patent creates a protected environment within the spool cavity by filling it with an isolating fluid that forms a barrier between the optical fiber and the harmful bore fluid. This inert-like environment prevents the optical fiber from being exposed to damaging chemicals and particles in the bore fluid
2Reliability
If the spool cavity is filled with isolating fluid to protect the optical fiber, then the optical fiber is isolated from bore fluids, but the apparatus complexity increases
Solution Approach 1:
The isolating fluid serves multiple functions simultaneously: it protects the optical fiber from bore fluid damage, maintains pressure balance within the spool cavity, and can be used to control the deployment rate. This multi-functionality reduces the need for additional separate mechanisms
Solution Approach 2:
The isolating fluid automatically fills the spool cavity as the optical fiber is deployed, maintaining the protective environment without requiring external intervention. The system self-regulates the fluid level and pressure balance during the deployment process
3Productivity
If the optical fiber is deployed at high speed, then the deployment productivity increases, but the risk of breakage increases
Solution Approach 1:
The isolating fluid acts as a cushioning medium that absorbs and distributes the mechanical stresses and shocks during high-speed deployment. This beforehand cushioning protects the optical fiber from sudden impacts and stress concentrations that could cause breakage, even when deployed at high speeds
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
The solution effectively protects the optical fiber from bore fluids, ensuring a smooth and reliable deployment by minimizing contact and potential damage, allowing for increased deployment rates and reducing the risk of breakage.
Implementation Method 1
the housing comprises an isolating fluid to isolate the elongate medium from the bore fluid entering the housing
Data Source
Figure 1a~1d
Figure 2a~2d
Figure 3a~3d
AI summary
An apparatus and method for deploying an elongate medium in a bore is described. The apparatus (10) comprises a housing (20) defining an internal spool cavity (11), wherein the housing (20) is configured to be deployed in the bore. A spool of elongate medium (16) is mounted within the spool cavity. The housing (20) defines an outlet (18) to permit the elongate medium to be deployed from the spool cavity, and an inlet (13) to permit bore fluid to enter the housing (20) during deployment of the elongate medium (16) from the spool cavity (11). In use, the housing (20) comprises an isolating fluid (41) to isolate the elongate medium (16) from the bore fluid (42) entering the housing (20). Also described is a kit for deploying elongate medium (16) in a bore and a method of preparing an apparatus (10) for deployment of an elongate medium (16) in a bore.