Perancangan Rim-Driven Turbine Generator Untuk Pembangkit Utama Rangkaian Pipa Bor Pengeboran Minyak Dan Gas Sumur Lepas Pantai

Anshori, Mohammad Sulthon Alwan Az Zahi Putra (2026) Perancangan Rim-Driven Turbine Generator Untuk Pembangkit Utama Rangkaian Pipa Bor Pengeboran Minyak Dan Gas Sumur Lepas Pantai. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengeboran Minyak Dan Gas Lepas Pantai Memiliki Tantangan Besar Berupa Fenomena Lost Circulation Yang Menyebabkan Kerugian Waktu Dan Biaya Operasional Yang Besar. Mitigasi Masalah Ini Dapat Dilakukan Secara Cepat Dan Multi-Cycle Menggunakan Smart Circulating Sub, Namun Alat Ini Menghadapi Kendala Pada Suplai Daya Listrik Mandiri Di Bawah Lubang Sumur (Downhole) Untuk Mengaktivasi Peralatannya. Penggunaan Turbin Konvensional Berporos Tengah Berisiko Memicu Penyumbatan (Clogging) Saat Mengalirkan Lost Circulation Material (Lcm). Oleh Karena Itu, Penelitian Ini Bertujuan Merancang Rim-Driven Turbine (Rdt) Berdesain Hubless (Tanpa Poros Tengah) Sebagai Pembangkit Daya Utama Yang Mampu Memberikan Clearance Ruang Lintas Bagi Material Lcm. Evaluasi Desain Dilakukan Melalui Simulasi Numerik Computational Fluid Dynamics (Cfd). Metode Simulasi Dibagi Menjadi Tiga Fase, Yaitu Optimasi Sudut Bilah Melalui Simulasi Steady-State, Analisis Putaran Tanpa Beban (Runaway Speed) Menggunakan Solver Transien 6 Degree Of Freedom (6Dof) Dengan Memvariasikan Jumlah Bilah (8, 10, Dan 12 Bilah) Dan Laju Aliran (400, 700, Dan 1000 GPM), Serta Ekstraksi Kurva Performa Mekanik. Hasil Penelitian Tahap Pertama Menunjukkan Bahwa Sudut Bilah 60 Derajat Menghasilkan Ekstraksi Energi Yang Paling Optimal. Berdasarkan Uji Lanjutan, Konfigurasi 8 Bilah Pada Ditetapkan Sebagai Desain Final Terbaik Karena Memiliki Rasio Soliditas Ruang Bilah Yang Paling Aman Untuk Meloloskan LCM. Desain Ini Terbukti Meminimalisir Rugi-Rugi Dengan Membatasi Pressure Drop Pada Rentang Operasi Turbin Yang Aman Sebesar 157 Kpa Pada Titik Tertingginya, Serta Menekan Risiko Kegagalan Sistem Mekanikal Dengan Menstabilkan Kecepatan Terminal Runaway Pada Batas Struktural Yang Aman Sebesar 3700 RPM. Berdasarkan Ekstraksi Kurva Performa Mekanik, Turbin Rancangan Ini Terbukti Mampu Menghasilkan Daya Mekanik Puncak Sebesar 554.9 Watt Pada Putaran 2000 Rpm. Rancangan RDT 8 Bilah Terbukti Memadai Untuk Menyuplai Kebutuhan Daya Pada Sistem Smart Circulating Sub Secara Optimal Sekaligus Menghilangkan Hambatan Distribusi Lcm, Sehingga Dapat Menjadi Awal Bagi Pengembangan Turbin Penggerak Generator Dalam Pipa Di Masa Mendatang.
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Offshore Oil And Gas Drilling Faces A Major Challenge In The Form Of Lost Circulation, Which Causes Significant Operational Time And Financial Losses. Mitigation Of This Issue Can Be Achieved Rapidly And In A Multi-Cycle Manner Using A Smart Circulating Sub. However, This Tool Encounters Constraints Regarding An Independent Downhole Electrical Power Supply To Activate Its Equipment. The Use Of A Conventional Center-Shaft Turbine Risks Triggering Clogging When Passing Lost Circulation Material (LCM). Therefore, This Study Aims To Design A Hubless (Center-Shaftless) Rim-Driven Turbine (RDT) As The Primary Power Generator Capable Of Providing Clearance Passage For LCM Materials. Design Evaluation Was Conducted Using Computational Fluid Dynamics (CFD) Numerical Simulations. The Simulation Method Was Divided Into Three Phases: Blade Angle Optimization Through Steady-State Simulations, No-Load Rotation (Runaway Speed) Analysis Using A Transient 6 Degree Of Freedom (6DOF) Solver With Varied Blade Counts (8, 10, And 12 Blades) And Flow Rates (400, 700, And 1000 GPM), And Mechanical Performance Curve Extraction. The Results Of The First Phase Showed That A 60-Degree Blade Angle Yielded The Most Optimal Energy Extraction. Based On Further Testing, The 8-Blade Configuration Was Established As The Optimal Final Design Because It Possesses The Safest Blade Space Solidity Ratio For Passing LCM. This Design Was Proven To Minimize Losses By Limiting The Pressure Drop Within A Safe Turbine Operational Range Of 157 Kpa At Its Highest Point, As Well As Mitigating Mechanical System Failure Risks By Stabilizing The Terminal Runaway Speed At A Safe Structural Limit Of 3700 RPM. Based On The Mechanical Performance Curve Extraction, The Proposed Turbine Design Proved Capable Of Generating A Peak Mechanical Power Output Of 554.9 Watts At A Rotational Speed Of 2000 RPM. The 8 Blade RDT Design Is Proven To Be Adequate For Optimally Supplying The Power Requirements Of The Smart Circulating Sub System While Simultaneously Eliminating LCM Distribution Bottlenecks, Thus Laying The Groundwork For Future Developments Of Downhole In Pipe Generator Driven Turbines.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Komputasi Dinamika Fluida, Perancangan, Rim-Driven Turbine, Sirkulasi Hilang, Smart Circulating Sub, Computational Fluid Dynamics, Lost Circulation, Design, Rim-Driven Turbine, Smart Circulating Sub
Subjects:	T Technology > T Technology (General) > T57.62 Simulation V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM740 Marine turbines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Mohammad Sulthon `alwan Az Zahi Putra Anshori
Date Deposited:	01 Aug 2026 03:28
Last Modified:	03 Aug 2026 03:10
URI:	http://repository.its.ac.id/id/eprint/141564

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