Measuring Total Indicator Runout
Andrew Dickey, Justin O’Neal, Daniel Whittlesey
API specification 11B requires that sucker rods are tested for Total Indicator Reading (TIR). Norris Sucker Rods has designed and installed equipment on several of the CNC rod end threading machines to check TIR. At present, they do not perform inspection on all rods, but they do desire to expand operations to check TIR on 100% of the rods. After the rods are inspected and TIR measured, random samples are sent to a third party for “verification”. In the past Norris has not had some problems with their readings matching up with the third party’s readings. As of late this has not been as big of an issue, but Norris still wants a complete remake of their current process. We will be designing a new mounting system that will have much less user interference. Doing this will allow for 100% inspection of all rods produced, and will not interfere with the operators.
API specification 11B requires that sucker rods are tested for Total Indicator Reading sometimes referred to as “Total Indicator of Run out” or TIR. Norris has designed and installed equipment on several of the CNC rod end threading machines to check TIR. At present they do not perform inspection on all rods. Norris desires to expand this operation to check TIR on all rods or perform 100% inspection. The proposed system will cut down on cycle time, as well as allow for less user interference with the operators.
Scope of Work
The objective of this project is to develop a new process for measuring total indicator reading on sucker rods for Norris Sucker Rods. The new process will be integrated into the production process and will inspect all rods (15,000 per day maximum) as they are produced. The total cost must be less than $60,000. After the measuring process has been completed, a statistical analysis of rod failures will be done to identify likely causes of TIR failures. As well, attention will be given to the best way to address non-conforming rods.