1 The C-Kore Subsea TDR Automated Cost-Effective and Reliable Subsea Testing
2 C-Kore Introduction Greg Smith • General Manager • Working with C-Kore for 8 years • Frequently supported products in the field
3 C-Kore Contents Introduction TDR Theory C-Kore vs Traditional Fault-Finding Case Study
4 Introduction
5 C-Kore Applications Subsea Tools for: Installation/Commissioning Fault-finding Operations Down-hole Testing
6 C-Kore Subsea Testing Tools Cable Monitor (IR & Continuity) Subsea TDR Pressure Monitor Subsea Modem
7 C-Kore Development Cable Monitor Cable Monitor Cable TDR Development Prototype Trials Released Prototype Trials 2015 Started in 2010 2017 2011
8 C-Kore TDR Specification Specification Range of over 20km Precision of 10cm Gain up to +52dB Automated pulse and step modes
9 C-Kore TDR Specification Results All results datalogged Built-in analysis tools with C-Kore result viewer Easy report generation
10 Time Domain Reflectometry
11 TDR Theory of Operation • Operation: • Transmits an electrical pulse and measures reflections (similar to sonar) • Identifies: • Distance to end of line / discontinuity • Type of discontinuity / termination
12 TDR Reflection Impedance Change TDR Amplitude Time
13 TDR Reflection Impedance Change TDR Amplitude Time Time = Distance to fault Time = Distance to line end
14 TDR Reflection Further Examples
15 C-Kore vs. Traditional
16 TDR Deployment 1. Vessel arrives in field Traditional Method 2. ROV launched 3. Downline deployed (move to safe distance) 4. ROV derigs and connects downline 5. TDR testing from back-deck Downline Issues: Impedance mismatch at interfaces Extra attenuation (reduced range) Operator skill under time pressure Quality of saved data
17 TDR Deployment 1. Vessel arrives in field C-Kore Subsea TDR 2. ROV launched 3. ROV connects and triggers C-Kore TDR C-Kore Benefits: Matched impedance (no extra reflections) Direct measurement (see extra detail) Automated and repeatable Interactive result analysis
18 Case Study: Fault-Finding
19 Case Study Fault Finding Background LIM shows IR failure on one channel Some spare cables available If umbilical failed (suspected) will need to decide repair vs replace
20 Case Study Fault Finding Supplied in small peli-case Deploy in work basket or tooling tray
21 Case Study Fault Finding Usage Test routine pre-programmed for simple subsea deployment Connect directly to subsea equipment, no downlines required Trigger measurement with light sensor, proximity sensor or schedule
22 Case Study Fault Finding Platform Static Umbilical (2 Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
23 Case Study Fault Finding Platform Static Umbilical (2 Cables) Dynamic C-Kore Cable Monitor: W5 Umbilical IR Measurement (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
24 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
25 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
26 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
27 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
28 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
29 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
30 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
31 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
32 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU W1 W2 W3 W4
33 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (2 Cables) SDU SDU 1. 2. W1 W2 W3 W4
34 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
35 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU C-Kore Cable TDR : For fault location TDR W1 W2 W3 W4
36 Case Study Fault finding with Subsea TDR IR fault identified using C-Kore Cable Monitor on infield umbilical Location will decide repair or replacement C-Kore Cable TDR used to determine location
37 Case Study Fault finding with Subsea TDR Baseline measurement Measurement on cores with good IR EFL to umbilical connection seen in impedance at beginning of graph Umbilical trace then flat showing no further discontinuities
38 Case Study Fault finding with Subsea TDR Fault measurement Measurement on cores with low IR EFL to umbilical connection seen in impedance at beginning of graph Discontinuity seen at 270m indicating fault location
39 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
40 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (4 Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU C-Kore Cable Monitor: IR Measurement W1 W2 W3 W4
41 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
42 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (3 Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
43 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (2 Bad Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
44 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (2 Bad Cables) (1 Bad Cable) SDU SDU W1 W2 W3 W4
45 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (2 Bad Cables) (1 Bad Cable) SDU SDU TDR C-Kore Cable TDR : For fault location W1 W2 W3 W4
46 Case Study Fault Finding Platform Static Umbilical (2 Good Cables) Dynamic W5 Umbilical (2 Good Cables) Static Umbilical Static Umbilical (2 Bad Cables) (1 Bad Cable) SDU SDU TDR Again, TDR shows faults in middle of cable length W1 W2 W3 W4
47 Case Study Trace Viewer C-Kore Interactive Trace Viewer
48 Case Study Fault Finding with Subsea TDR automated fast, liberated direct, reliable Measurements made directly Pre-programmed test No downline deployment / subsea. No errors from routine removes the need recovery time. No waiting impedance mismatches. for skilled TDR operator. for platform testing.
49 Case Study Fault Finding Cost savings • Vessel Time • Personnel and Equipment
50 C-Kore Systems Simplifying Subsea Testing Thank You, Any Questions?
Recommend
More recommend
