’Stoker Series™’ Live Well Testing Bonnyville, Alberta, Canada
Scope
This document details the results encountered on the fore mentioned job as well as the
resolutions and analysis.
Description Of Trial And Equipment Used
The purpose of this trial was to test the newly engineered parts and confirm their viability on a
commercial level. We were to install the tool in 7” casing using 2 7/8 tubing with 7/8 sucker rod to a depth of 120Md. Fresh water was used in all tests. The tubing was circulated through a return line back into the annulus creating a closed loop system. A digital flow meter and pressure transducer were used to capture the well data. The rig was a Crown WTD-00350 Mobile Free -Standing Single Class II Description. The well was under the control of Clark Downhole Tools (CDHT). Multiple days were spent on location performing a various array of testing.
Result
The results from the test confirmed what we had suspected after using hydraulic fluid modeling software using the new components. The revised design was working very well.
Once we had installed the rods and reverse-circulated the tubing to fill it, we stroked the pump and immediately had fluid coming out the end of the test line. We stroked the tool five times to rid the well of any trapped air and collected the fluid in 5-gallon pails for observation purposes.
After removing the air from the well, the hose was hooked up to the BOP stack on the annulus side for re-circulation. The tool was then set through a series of tests using a benchmark set of mtesting procedures over a 20-stroke timeframe. The results from the testing are as follows: On 20 strokes using water at 10 strokes per min the tool produced 80.15 gal to surface. A test using 20 strokes with water at a rate of 5 strokes per min yielded 80.08 gal to surface. Both tests showed similar pressures.
Review
After taking what we learned from the India trial and doing an engineering re-design to the
upper piston component of the tool we were able to take the tool from 25% efficient to over
95% efficient.
The output values that were recorded match to the theoretical values for displacement outputs. This confirmed without a doubt that the new design is ready for production.
The following charts and graphs show the actual velocities created during the test scenario that prove the functionality of the newly designed components.