Solid Chemical Delivery in Downhole Wellbore
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Solution Overview
Problem
Current methods for delivering chemical treatments in oil field operations are inefficient in reaching the lowest portions of the wellbore and often result in liquid chemical spills, leading to ineffective scale inhibition and corrosion prevention.
Innovation Solution
A downhole assembly using solid chemical treating materials, such as cylindrical sticks or discs, that slowly dissolve in hydrocarbon fluids, providing targeted and controlled release of scale inhibitors and corrosion preventatives directly at the wellbore, reducing waste and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid chemical treatments are delivered in conventional methods, then chemical release occurs, but the chemicals do not effectively reach the lowest portions of the wellbore and cause liquid spills
Solution Approach 1:
The patent changes the physical state parameter of the chemical treatment from liquid to solid form. Solid chemicals are placed in a carrier assembly that delivers them to the lowest portions of the wellbore, eliminating liquid spill hazards while maintaining chemical release effectiveness for scale inhibition and corrosion prevention
Solution Approach 2:
The patent uses a disposable carrier assembly that holds solid chemicals and is discarded after use. The carrier assembly is inserted into the wellbore, releases the solid chemicals at the target location, and is then removed and disposed of, eliminating the need for complex retrieval systems and ensuring complete chemical delivery without residual liquid
2Reliability
If conventional chemical delivery methods are used, then chemical treatment is provided, but scale inhibition and corrosion prevention are ineffective
Solution Approach 1:
The patent applies preliminary action by delivering solid chemicals directly to the lowest portions of the wellbore where scale buildup and corrosion are most likely to occur. The chemicals are positioned in advance at the critical location, ensuring immediate and effective protection when hydrocarbon fluids begin flowing, thereby reducing the frequency of subsequent intervention operations
Solution Approach 2:
The patent applies local quality by concentrating the chemical treatment precisely at the lowest portions of the wellbore rather than distributing it uniformly. The carrier assembly is designed to release chemicals specifically at the location where scale inhibition and corrosion prevention are most critical, maximizing the effectiveness of the treatment
3Measurement precision
If solid chemical treating materials are used, then targeted chemical release is achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the chemical treatment system into discrete solid chemical units held within a modular carrier assembly. The carrier assembly consists of simple components such as a container, release mechanism, and positioning elements, allowing targeted delivery without requiring complex downhole equipment or multiple interconnected systems
Data Source
AI summary
A method for downhole delivering of chemicals to a wellbore at the level of a hydrocarbon-bearing formation using an assembly formed form a blank tubular with first and second perforation sections, a no-flow nipple connected on one end and a bull plug connected on the other end, wherein the chemical is in solid phase, and slowly dissolves when exposed to wellbore fluids forming a method that can be repeated with the same equipment but additional charges of chemical.