By: Mr. Sujit Chakravarty and Ms. Tanusree Chakravarty Mukherjee

Transcription

1 By: Mr. Sujit Chakravarty and Ms. Tanusree Chakravarty Mukherjee

2 Oil & Gas Industries are facing challenges due to economic downturn. Energy Market is shifting more towards eco friendly sources of energy. Reducing green house gases and protect earth from ill effect of global warming is the key This Economic scenario needs more natural gas based products either form of Compressed Natural Gas (CNG) or liquidified fuels in both Liquidified Natural Gas (LNG) and Gas to Liquid (GTL) forms. Compressor are mandatory part of the process. Economical benefits of embedded sensors based continuous integrity monitoring is a need for oil and gas industries.

3 Typical Upstream Gas & Condensate Production and Compression Unit Diagram

4 Typical Down stream LNG Production Unit Diagram

5 1. Compressors are heart of the natural gas based projects. 2. Huge investments are involved in both upstream and downstream gas compression units. 3. This has been a trend to have standby compressors to minimize the impact of failures and uncertainty involved with it. 4. An effective Risk Base Inspection (RBI) & monitoring system of Compressors will cut down capital expenditure drastically. 5. Embedded acoustic and vibration sensors will ensure reliable monitoring between two planned outage time.

6 Compressors have failed due to rotors succumbed to various stress: 1. Thermal stress. 2. Torsional stress. 3. Stress due to vibration. 4. Mechanical stress. 5. Fti Fatigue stress. Some failures are unpredictable & costly

7 To eliminate possibility of surprise failure we need embedded monitoring system Acoustic sensors Vibration sensors Data acquisition and transmission Data integration and analysis. Risk based Inspection software/ program. Reliability and cost effectiveness Magnetic Vibration Sensor

8 Types of Acoustic sensors that is in view Piezo polymer film sensors. Continuous wave inter digital transducers. Permanently polarized piezo ceramic i crystals {dielectric}. i Gyro magnetic acoustic sensors.

9 Piezo ceramic layers can be used for axial and centrifugal compressor rotors Suction Axial Compressor Rotor/ Stator Blades Shrouded Impeller Gas flow Strategically Placement of Piezo ceremic sensors detects development of flaw

10 Types of vibration sensors that is in view Proximity probe type sensor (using Hall Effect) Piezo electric accelerometer sensors. Mechanical vibration sensors Pressure Type Torque Type

11 Both Acoustic & Vibration Sensors are going to be integrated in electronic and computing system. Casings and Bearings

12 Currently installed equipment in the aging oil & gas reservoirs are no longer considered to be economically efficient with huge initial Investment of standby compressor. The design or maintenance decisions is going to be changed according to changing market scenario. Repair costs and safety have a huge drive to apply the probabilistic assessment on rotating equipment.

13 This process is expected to be another reason to bolster the growth of the embedded acoustic and vibration sensors usage with continuous health check system. Embedded acoustic and vibration sensors will ensure reliable monitoring system together with Risk Base Inspection (RBI) will ensure business economics and sustainability bl in Oil & Gas Industries.

14 Presenter : Sujit Chakravarty sujit@velosi.com Co author : Tanusree Chakravarty Mukherjee tanusree.chakra@gmail.com