MORE IMPROVEMENTS TO DEEPWATER SUBSEA MEASUREMENT 10121-4304-01 Chip Letton Letton Hall Group letton@lettonhall.com (281) 493-1100 Subsea Systems TAC Meeting Greater Fort Bend EDC Boardroom, Sugar Land, TX Tuesday, May 28, 2013 rpsea.org rpsea.org

Project Objective Close gaps in performing flow (and other) measurement in deepwater drilling and production systems. Where possible, build on gains achieved in RPSEA 07121-1301, Improvements to Deepwater Subsea Measurement.

Project Tasks Task 5 – Subsea Sampling Task 6 – Subsea Measurement Sub-Task 6.1 – ROV-Assisted Wet Sensor Measurement Sub-Task 6.2 – Flow Measurement Through a Transparent Spool Sub-Task 6.3 – Returns Density Measurement at the Mud Line Task 7 – Downhole Differential Pressure Measurement Task 8 – Evaluation of Virtual Flow Meters Task 9 – Detection of Meter Fouling

4304-01 JIP Participants

Project Costs Projected Project Cost at 4/30/13: $1,409,536 Actual Project Cost at 4/30/13: $735,072 (52.1%) Slow start due to delays in subcontractor activity in both Tasks 5 and 6. Most Tasks running at or near budget.

Costs

Costs: Tech Transfer & Cost Share

Schedule The five task schedules range from on schedule (Task 9, Detection of Meter Fouling) to 4 months behind schedule (Subsea Sampling). Delays are primarily due late starts. None of the delays will prevent our successfully completing the project in the allotted time, i.e., by 2 July, 2015.

Achievements T5: Sampler requirements developed and distributed for JIP member comment. T6: Clamping mechanism for Transparent Section designed, in prototyping. T6: Mud Flow Calibration Loop under construction. DP and US parts ordered. T7: Downhole DP gauge package completed Critical Design Review. Cylindrical sensor package 1.13” long by 0.95” diameter. T8: Statoil data set for VFM evaluation refined to meter conditions. Plans made for live tests in LSU well-flow loop this summer. Five VFM suppliers engaged. T9: NEL investigation recommends fouling detection by data reconciliation or internal MPFM diagnostics.

Task 7: Downhole Differential Pressure (DP) Sensor A Closer Look Task 7: Downhole Differential Pressure (DP) Sensor

Program Objective Leverage RPSEA Project 1301 DP sensor development for a new application: downhole measurement. Design, fabricate and deliver a minimum of two DP sensor packages that meet the following top-level requirements: Overall outer diameter useable for downhole applications (reduced from 2.05 inches) while meeting same (1301) sensor performance accuracy of 2 mbar (0.035%) Survive high pressure testing (to 22,500 psia) Operate and survive high temperature testing (to 250 °C)

Legacy from RPSEA Project 07121-1301 HP/HT cell developed of during RPSEA 07121-1301 had a 2-inch diameter – too large for a downhole gauge (<1-inch).

Twenty-seven MEMS sensor die packs remain from the 07121-1301 work. DP SENSOR DIE Twenty-seven MEMS sensor die packs remain from the 07121-1301 work. 6 bar (85 psi) DP sensors

LO Side Isolation Diaphragm Kovar Header with ceramic mount CELL DESIGN LO Side Isolation Diaphragm Internal Diaphragm LO Side Cell Body Oil Fill Ports HI Side Cell Body Electrical Wires Port MEMS DP Sensor (full bridge) HI Side Isolation Diaphragm Kovar Header with ceramic mount

DP SENSOR CELL 1.130” 0.850” 0.950” 1.030” HIGH Side Cell Body Isolation diaphragm LOW Side Cell Body HIGH Side Cell Body

Obstacles As reported last time, BP has been sanctioned by the US Environmental Protection Agency (EPA) and cannot financially participate in our RPSEA Project 4304 JIP until the sanctions are removed. A second JIP member, Shell, unexpectedly decided not to participate. We have vigorously recruited other companies to fill the JIP funding gap, have identified one – perhaps two – who we expect to join the JIP.

MORE IMPROVEMENTS TO DEEPWATER SUBSEA MEASUREMENT 10121-4304-01 Chip Letton Letton Hall Group letton@lettonhall.com (281) 493-1100 Subsea Systems TAC Meeting Greater Fort Bend EDC Boardroom, Sugar Land, TX Tuesday, May 28, 2013 rpsea.org rpsea.org