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