An Investigation About the Trajectory Control During the Subsea Equipment Installation Using Cable

2012 ◽  
Author(s):  
Eugenio Fortaleza ◽  
Daniel Albuquerque ◽  
Marcio Yamamoto
Keyword(s):  
Natural Gas ◽  
Deep Water ◽  
Time Domain ◽  
Christmas Tree ◽  
Offshore Drilling ◽  
Cable System ◽  
Deep Waters ◽  
Drilling Unit ◽  
And Control ◽  
Installation Cost

Nowadays, several seafloor equipments have been developed and deployed in order to enhance the production of petroleum and natural gas from reservoirs in deep and ultra-deep waters. Thus the installation and maintenance of such seafloor equipments shall be an issue. The most important seafloor equipment during the production phase is the “Wet Christmas-Tree” (X-tree), which is a set of valves that controls the pressure at well bottom. This equipment is installed by a Mobile Offshore Drilling Unit (MODU) after the drilling and completion are finished. Recently, beside the X-mas, a variety of subsea pumps, usually called as Subsea Booster System, have been deployed in the development of new reservoirs in deep-water. At the beginning, such subsea pumps and even other seafloor equipments had been installed by a MODU. But the high-cost of the MODUs is one of the main concerns about the installation and maintenance of the subsea equipments. One alternative to reduce the installation cost is to use cable system installed on a service boat instead the completion riser of a MODU. This paper presents an initial investigation for the installation of a seafloor equipment using cable. The dynamic model will be featured; the dynamic analysis will be carried out using an in house developed simulation program in time-domain. Discussion about the trajectory and control of the equipment to be installed is also included.

scholarly journals OPTIMALISASI PEMBORAN LEPAS PANTAI MENGGUNAKAN DRILLING TEMPLATE SEBAGAI TEMPAT DUDUKNYA SUBSEA WELLHEADS DAN X-MASS TREE DENGAN MEMANFAATKAN LONG LEG JACK UP RIG

PETRO ◽  
2018 ◽  
Vol 4 (4) ◽  
Author(s):  
P Simorangkir
Keyword(s):  
Christmas Tree ◽  
Offshore Drilling ◽  
Drilling Rig ◽  
Drilling Unit ◽  
Jack Up

LONG LEG JACKUP RIG DAN PEMANFAATAN<br />Pemboran dilepas pantai pada umumnya dilakukan dengan perangkat pemboran lepas pantai yang dikenal dengan istilah Mobile Offshore Drilling Unit (MODU). Ada beberapa macam MODU yang lazim dikenal yaitu Jack Up Drilling Rig, Drillship, Semi Submersible Rig dan Tender Assist Platform Rig.<br />Untuk pemboran dilepas pantai dengan kedalaman laut 100 meter seperti di lapangan lepas pantai “Natuna”, dapat dipergunakan jenis Semi submersible Rig, DrillShip ataupun Long Leg Jack Up Drilling Rig. Dilihat dari aspek biaya dari ketiga jenis rig ini, maka yang paling murah dan cocok untuk daerah lepas pantai dilaut Natuna ini adalah jenis Long Leg Jack Up Drilling Rig, yang memiliki kaki yang panjangnya dapat mencapai kedalaman laut tersebut. Jenis mobile rig ini adalah yang termurah dari dua jenis mobile rig lainnya.<br />Dengan menggunakan Long Leg Jack Up Drilling Rig ini akan dapat dilakukan pemboran beberapa sumur pengembangan dilapangan minyak didaerah lepas pantai Natuna itu dengan menggunakan Drilling Template sebagai tempat duduknya Subsea Well Head dan Christmas Tree. Dengan demikian maka tidak perlu digunakan Subsea Blow Out Preventer (BOP), yang membutuhkan waktu yang lama dan rumit pemasangannya. Sebagai gantinya dapat digunakan BOP yang lazim dipergunkan pada operasi pemboran didarat (Onshore),.yang posisinya berada diatas permukaan laut .<br />Untuk menghemat biaya mobilisasi rig dari pemboran satu sumur ke sumur lainnya, maka pemboran sumur pengembangan dilepas pantai ini dapat dilakukan dengan cara menggeser (skid) rig pada landasan yang tersedia di Jack Up tersebut, sehingga beberapa sumur dapat dibor dari lokasi dimana<br />Long Leg Jack Up Drilling Rig tersebut berdiri, sesuai dengan slot yang terdapat pada Drilling Template yang digunakan. Dapat terdiri dari 3slot, 4slot, atau bahkan lebih, tergantung dari luas penyebaran dari resevoir hidrokarbon yang akan diproduksikan. Biasanya salah satu dari beberapa sumur yang akan dibor melalui slot di Drilling Template ini adalah sumur vertkal dan selebihnya adalah sumur berarah atau directional well.

Dynamic Behavior of a Semi-Submersible Platform Coupled With Drilling Riser During Re-Entry Operation in Ultra-Deep Water

2007 ◽  
Author(s):  
Marcio Yamamoto ◽  
Celso K. Morooka ◽  
Seiya Ueno
Keyword(s):  
Deep Water ◽  
Time Domain ◽  
Model Simulation ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Dynamic Positioning System ◽  
Deep Waters ◽  
Operational Costs ◽  
Simulation Results ◽  
Platform Motions

The present study deals with the dynamics of a semi-submersible platform coupled with a free-hanging vertical rigid riser during the re-entry operation in ultra-deep water. The reentry operation occurs after the drilling phases are accomplished which only use the bare drillstring. The re-entry operation entails positioning the subsurface Blow-Out-Preventer (BOP) above the wellhead and installing it to the wellhead. During this operation, the BOP is suspended by the drilling riser. The placement and installation is time consuming and requires a great amount of accuracy. One challenge is the effects of platform motions on the installation procedure. The present work was carried out with the aim to understand the influence of platform motions during the re-entry operation in ultra-deep waters. Another benefit of this study is the knowledge of the effect of platform motions on the drilling riser and BOP which leads to the possibility of drilling more than one well without the need to raise the BOP to the surface. This could greatly reduce the amount of time needed to drill subsurface wells which in turn, reduces overall operational costs. A numerical simulation in time domain has been carried out using a non-linear model for the platform dynamics. The dynamics of a free hanging drilling riser and a dynamic positioning system (DPS) of the semi-submersible platform are included in the numerical model. Simulation results in time domain of the platform displacements with DPS and riser displacement are shown. A discussion of riser displacement and DPS control is also included.

Concept and principles of building an integrated system of management of activities of regional gas supply system entities Kaliningrad region

2019 ◽  
pp. 64-72
Author(s):  
G.G. Arunyants
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Supply System ◽  
Integrated System ◽  
Software Complex ◽  
Geographically Distributed ◽  
Basic Solutions ◽  
Kaliningrad Region ◽  
And Control ◽  
Gas Supply

The results of analysis of problems of regulation of gas supply complex of Kaliningrad region and main ways to increase its efficiency, as well as basic solutions for creation of a software complex Т-GAZ-2 automated calculation of natural gas tariffs for ACS of gas supply system subjects, geographically distributed and information connected to the regional automated information and control system (RAIS).

scholarly journals Autonomous Underwater Vehicles and Field of View in Underwater Operations

2021 ◽  
Vol 9 (3) ◽  
pp. 277
Author(s):  
Isaac Segovia Ramírez ◽  
Pedro José Bernalte Sánchez ◽  
Mayorkinos Papaelias ◽  
Fausto Pedro García Márquez
Keyword(s):  
Autonomous Underwater Vehicles ◽  
Underwater Vehicles ◽  
Field Of View ◽  
Guidance System ◽  
Control Algorithms ◽  
Deep Waters ◽  
Underwater Cameras ◽  
Optimal Resolution ◽  
Acquisition Processes ◽  
And Control

Submarine inspections and surveys require underwater vehicles to operate in deep waters efficiently, safely and reliably. Autonomous Underwater Vehicles employing advanced navigation and control systems present several advantages. Robust control algorithms and novel improvements in positioning and navigation are needed to optimize underwater operations. This paper proposes a new general formulation of this problem together with a basic approach for the management of deep underwater operations. This approach considers the field of view and the operational requirements as a fundamental input in the development of the trajectory in the autonomous guidance system. The constraints and involved variables are also defined, providing more accurate modelling compared with traditional formulations of the positioning system. Different case studies are presented based on commercial underwater cameras/sonars, analysing the influence of the main variables in the measurement process to obtain optimal resolution results. The application of this approach in autonomous underwater operations ensures suitable data acquisition processes according to the payload installed onboard.

Planning and Control in Construction of LW3-1 Jacket

2013 ◽  
Vol 467 ◽  
pp. 277-281
Author(s):  
Shao Ning Han ◽  
Hong Wang ◽  
Hang Wu ◽  
Pi Song Sun ◽  
Yu Hui Xue ◽  
...  
Keyword(s):  
Quality Control ◽  
Process Control ◽  
Deep Water ◽  
Construction Technology ◽  
Structural Dimension ◽  
Planning And Scheduling ◽  
Comprehensive Management ◽  
Planning And Control ◽  
Traditional Classification ◽  
And Control

According to Chinese traditional classification, large-sized jackets weight over 10,000 tons and stand in over 100-meter water. Large-sized jackets are different from the normal in construction tonnage, structural dimension and quality control requirements as well as construction difficulty. More complicated construction technology and programme, higher grade of materials, stricter control requirements on node weld and higher risks all need matched stricter, more meticulous and more comprehensive management in planning and scheduling. Combined with construction of LW3-1 deep-water jacket, this paper describes the planning, tracking progress, process control and optimization.

Nonlinear Drop Simulations of a Christmas Tree in Deep Waters

2014 ◽  
Author(s):  
Arya Majed ◽  
Phil Cooper
Keyword(s):  
Cone Angle ◽  
Water Entry ◽  
Christmas Tree ◽  
Impact Zone ◽  
Initial Water ◽  
Type Method ◽  
Deep Waters ◽  
Uniform Current ◽  
Simulation Results ◽  
Water Simulation

This paper presents an investigation of the still water sink trajectories of an accidentally dropped Christmas Tree (XT). A 3D coupled nonlinear dynamics/hydrodynamics model of the XT is constructed and simulations executed from surface to seabed. XT initial water entry orientations are randomly varied in a Monte-Carlo simulation to predict the seabed impact zone. Still water simulation results are compared to simplified cone-angle type method predictions. The effect of XT flat panels on excursion mitigation is investigated. Finally, the influence of non-uniform current effects is studied.

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