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

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

3. 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

4. JIP Participants

5. 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.

6. Costs

7. Costs: Tech Transfer & Cost Share

8. 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.

9. 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.

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

11. 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)

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

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

14. 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

15. 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

16. 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.

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