Technical Paper Archive


This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.


For older papers not listed here, please send your request, including Meeting Year, Title, Author, and Paper # to: cbrady@rubber.org


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O-Ring Extrusions under Hight Pressure Hight Temperature Conditions

A33 azhong paper

Event: 198th Technical Meeting - Fall 2020
Location: Virtual
Date: October 19, 2020
Author: Allan Zhong
Paper Number: A33

Price: $20.00

  • O-ring sealing systems are ubiquitous in oil/gas field applications and have been extensively tested. The general relationships between O-ring designs and their performances are well known; however, O-ring extrusion failure is still frequently encountered in various applications. As a result, there is still a need to test standard O-rings when changes in materials, sealing gland configuration, or service temperatures occur. This study is intended to uncover universal relationships between O-ring design parameters and their extrusion-resistance performance. A comprehensive experimental program was developed to study the extrusion-resistance performance of four different ISO3601-1 sized O-rings made from a single batch of rubber. The study was conducted at 400°F when subjected to three extrusion gaps, at squeezes of 4%, 10%, and 15%. A total of 160 tests were performed in which the pressures required to extrude the O-rings were measured. The conventional data analysis of the specimens and test results confirmed and quantified well-known trends. Two observations worth noting are that for the same extrusion gaps, smaller-sized O-rings have lower pressures to extrude, and the extrusion pressure at failure is insensitive to squeeze. The dimensional-analysis-based advanced data analytics revealed that the extrusion pressure normalized by material stiffness is uniquely related to a relative extrusion gap. A master curve of normalized extrusion pressure to the relative extrusion gap is established, collapsing curves from test results of all four O-ring sizes into a single curve. This master curve can be used to reduce physical tests for the evaluation of O-ring performance under HPHT conditions.

    Papers from 198th Technical Meeting - Fall 2020

    Items from 198th Technical Meeting - Fall 2020