North America

Red Room - Session 10

8:00 to 9:00 a.m. Thursday, June 5, 2014

Innovative Permanent Downhole Gauge: Road to Reliability

A permanent downhole gauge can increase well productivity by providing real-time data concerning downhole conditions throughout well life. The gauge discussed in this presentation can obtain continuous pressure and temperature data without well intervention, and therefore can enhance reservoir management. These gauges are permanently installed in severe downhole environments and rarely require retrieval to surface for any analysis or maintenance. Despite harsh conditions, the gauge is designed to achieve operational reliability of 90% for at least 5 years or more at temperatures of up to 200°C and pressures that reach 30,000 psi.

This presentation discusses the Design for Reliability (DfR) process used during the gauge development along with the effectiveness and limitations of the DfR tools applied during the product development cycle. The DfR tools and their order of deployment were critical to design reliability to ensure that the expectations of the gauge would be met fully. Gauge development was guided by the “LIFECYCLE” program, which is a systematic and concurrent product development program developed by the engineering company that designed the gauge. The discussion will include information concerning the DfR methods and capabilities of the gauge, and it will highlight the output of DfR tools that will verify the gauge reliability.

Key Words: Design for Reliability, Product Development Cycle, Failure Mode and Effect Analysis, Accelerated Testing, Acceleration Factor, Weibull Distribution

Pankaj Shrivastava, Aswin Balasubramanian, Hai Bi, James Flygare, Joey Jiang, Mike Jenson and Matthew Scogin


Spring, Texas