Loading...

Numerical Simulation and Investigation of Different Parameters on Performance of Swellable Packers

Zaer, Mohsen | 2022

162 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55020 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Arghavani Hadi, Jamal; Asempoor, Ahmad
  7. Abstract:
  8. When swellable elastomers expose to a suitable fluid, they swell by adsorption, which the result composition is called the gel. Gels have a variety of application, including drug delivery, sensors, actuators, micro-valves, and swellable packers. Swellable packers are a widely used tool in the oil and gas industry that are used for various operations such as supporting cement operations, water shut-off and well compartmentization, so appropriate knowledge about their behavior and the impact of various factors on its performance can lead to the optimal and safe designing of these devices. In this thesis, a suitable and validated potential energy function has been selected to evaluate the performance of these packers and its equilibrium state has been simulated in ABAQUS commercial software using UHYPER subroutine. In simulation, the influence of parameters affecting performance such as friction, length and thickness of elastomer, height of end ring and distance from wall, has been investigated and by simulation of experimental test sample, its relationship with packer behavior has been investigated. The results show that as the length-to-thickness ratio increases, the pressure on the well wall will increase, but for an ideal geometry that prevents elastomer displacement along the length, the behavior will be exactly the same for the equal length-to-thickness ratio. Also, the higher the ratio of wall height to elastomer thickness, the pressure will decrease exponentially. For ideal geometry and for equal proportions, behavior matched. The end ring will be the most important factor influencing the pressure when the elastomer thickness and height of wall are set, which can increase the wall pressure ten times for ideal end ring whose height is the same as the wall height, but without the ring height, not as high as the wall, the higher the height, the increased stress concentration in the packer and can cause the packer to rupture. The behavior of the experimental test specimen and the packer geometry specimen generally behave differently, but ideally, for the same elastomer material and fluid, the applied wall pressure for these two specimens can be converted to each other with a certain ratio
  9. Keywords:
  10. Swellable Elastomer ; Simulation ; Gas Industry ; Petroluem Industry ; UHYPER Subroutine

 Digital Object List

 Bookmark

No TOC