Temperature-Dependent Polymer Barrier for Swellable Packer Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing swellable materials in subterranean wells swell prematurely due to inadvertent influx of hydrocarbon fluids, making it difficult to position tubular strings correctly, as they expand before reaching the desired location.
Innovation Solution
A temperature-dependent barrier comprising a highly crystalline polymer that is initially impermeable to swelling fluids, becoming permeable only when heated to its crystallization temperature, allowing controlled swelling of the swellable material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a swellable material is exposed to swelling fluid in a well, then the material swells to provide sealing and actuation functions, but the material swells prematurely before reaching the desired position
Solution Approach 1:
The swellable material is pre-positioned within the wellbore in a compressed state before the swelling fluid is introduced. The material is prepared and positioned in advance but remains in a non-swollen state until the desired location is reached, allowing preliminary positioning without premature activation of the swelling function
Solution Approach 2:
The swelling fluid is separated from the swellable material during transport and positioning. The material is deployed to the target location first, and the swelling fluid is introduced separately at the desired moment, extracting the swelling trigger from the material until the appropriate time
2Manufacturing precision
If a barrier is used to prevent contact between swelling fluid and swellable material, then positioning accuracy is improved, but the barrier must be temperature-dependent to enable controlled swelling
Solution Approach 1:
The barrier material's permeability parameter is changed in response to temperature variations. The barrier transitions from an impermeable state at lower temperatures to a permeable state at higher temperatures, allowing the same barrier structure to provide both protection during positioning and enablement of swelling at the target location
Solution Approach 2:
Temperature acts as an intermediary parameter that controls the barrier's state. Rather than using a complex mechanical release mechanism, the temperature-dependent barrier uses thermal energy as a mediator to automatically transition from blocking to permitting fluid passage, simplifying the overall system
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
This solution enables delayed swelling of the swellable material until the polymer reaches the desired temperature, allowing for precise positioning of tubular strings and controlled actuation of well tools, preventing premature expansion and ensuring effective sealing and operation.
Implementation Method 1
a barrier which comprises a crystalline polymer. The polymer is substantially impermeable to the hydrocarbon gas or liquid, whereby the polymer initially prevents swelling of the swellable material, but the polymer becomes increasingly permeable to the hydrocarbon gas or liquid when heated to a crystallization temperature of the polymer.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A swellable packer can include a material which swells when contacted with a swelling fluid, and a barrier comprising a highly crystalline polymer which is substantially impermeable to the swelling fluid. A method of controlling swelling of a material can include positioning the material and a barrier in a well, the barrier preventing contact between the material and a swelling fluid, the barrier comprising a polymer, and increasing a permeability of the barrier to the swelling fluid in response to the barrier polymer being heated to its crystallization temperature. A well system can include a material which swells in response to contact with a hydrocarbon gas, and a barrier which comprises a crystalline polymer, the polymer being substantially impermeable to the hydrocarbon gas, whereby the polymer initially prevents swelling of the material, but the polymer becomes increasingly permeable to the hydrocarbon gas when heated to its crystallization temperature.