Design of Grease Permeability Measurement Setup Problem Statement
Permeability Coefficient
Pressure sensors in a wellbore are exposed to gas permeation which shortens their lives. Emerging sensors with the least permeable fluids is a way to reduce the problem.
Project Objectives 1. 2. 3. 4.
To design a modular experimental setup Be capable of maintaining fluids including hydraulic oil and grease Be able to conduct testing under extreme temperature at 300℃ and pressure at 3000 psi To analyze factors affecting pressure loss, permeability coefficient and flux of gas through fluids at various conditions
Matthew Butzer Vuochlin Veung Salomon Mbouombouo Jason Elkin Devin O’Donnell
Test Setup
HELIUM FLOW
Design
Faculty Advisor
Team Members
Microscopic Theory • Permeability Coefficient:
đ?‘„: =
; <=>
FLUID
where â&#x20AC;˘ Flux:
? EF
=
C
@ ADB
? EG
+
Zahed Siddique Sponsor Liaison Raghu Madhavan Chunnong Wang TA: Nooshin Nassr
Macroscopic Theory â&#x20AC;˘ Permeability Coefficient:
đ?&#x2018;&#x2018;đ?&#x2018;? 273đ?&#x2018;&#x2030; 11 đ?&#x2018;&#x201E;= đ?&#x2018;&#x2122; đ?&#x2018;&#x2018;đ?&#x2018;Ą 760(273 + đ?&#x2018;&#x2021;) đ??´ đ?&#x2018;?
?
@ AB
Figure 4. Permeability Coefficient of Hydraulic Oil at 30â&#x201E;&#x192;
? EH
â&#x20AC;˘ Flux:
đ??ˇKI đ??šI = (đ?&#x2018;&#x192;IN â&#x2C6;&#x2019; đ?&#x2018;&#x192;IP ) đ?&#x2018;&#x2026;đ?&#x2018;&#x2021;đ?&#x2018;&#x2122;:
đ??š=
Figure 5. Permeability Coefficient of Hydraulic Oil at 120â&#x201E;&#x192;
Flux/Gas Flow Rate
(56 758 ) đ?&#x2018;&#x201E; 9
Data Analysis Figure 1. Membrane and Support Disk
Figure 2. Setup
Pressure Integrity Results Materials Average High Pressure Loss: .539 psi/hour
â&#x20AC;˘ Stainless Steel Pressure Vessel â&#x20AC;˘ O-Rings: Nitrile (10x) â&#x20AC;˘ Steel Bolts: 4.5â&#x20AC;? (6x) & 1.5â&#x20AC;? (4x)
â&#x20AC;˘ By showing the pressure integrity test, the setup is proved to deliver accurate data with pressure loss less than 0.6 psi/hr â&#x20AC;˘ Permeability coefficient linearly increases and flux exponentially decreases with increasing fluid heights regardless of condition â&#x20AC;˘ By increasing pressure by 500 psi from 30 â&#x201E;&#x192; to 120â&#x201E;&#x192;, the coefficient is reduced by 35% but flux is increased by only 11%
Conclusion â&#x20AC;˘ â&#x20AC;˘ â&#x20AC;˘
Figure 3. Comparison of Pressure Loss for 10 Tests
Figure 6. Flux at 30 â&#x201E;&#x192; at Different Fluid Heights and Pressures
Pressure does not have much effect relatively to that of temperature on permeability coefficients and gas flow rate Increasing temperature, however, has a greater impact on reducing coefficient than on increasing flux It is wise to select hydraulic oil as a fluid prevention from permeation at extreme conditions as required by Schlumberger
Figure 7. Flux at 120 â&#x201E;&#x192; at Different Fluid Heights and Pressures