Analysis of operational availability and blowout frequency for offshore drilling system

2013 ◽  
pp. 3073-3079
Author(s):  
Y Lee ◽  
D Chang ◽  
S Han ◽  
M Ryu
Keyword(s):  
Offshore Drilling ◽  
Drilling System

Study of Nonlinear Internal Waves and Impact on Offshore Drilling Units

2011 ◽  
Author(s):  
Nishu V. Kurup ◽  
Shan Shi ◽  
Zhongmin Shi ◽  
Wenju Miao ◽  
Lei Jiang
Keyword(s):  
Numerical Model ◽  
South China Sea ◽  
Internal Wave ◽  
Internal Waves ◽  
South China ◽  
Andaman Sea ◽  
Offshore Drilling ◽  
Nonlinear Internal Waves ◽  
Drilling Operations ◽  
Drilling System

Internal waves near the ocean surface have been observed in many parts of the world including the Andaman Sea, Sulu Sea and South China Sea among others. The factors that cause and propagate these large amplitude waves include bathymetry, density stratification and ocean currents. Although their effects on floating drilling platforms and its riser systems have not been extensively studied, these waves have in the past seriously disrupted offshore exploration and drilling operations. In particular a drill pipe was ripped from the BOP and lost during drilling operations in the Andaman sea. Drilling riser damages were also reported from the south China Sea among other places. The purpose of this paper is to present a valid numerical model conforming to the physics of weakly nonlinear internal waves and to study the effects on offshore drilling semisubmersibles and riser systems. The pertinent differential equation that captures the physics is the Korteweg-de Vries (KdV) equation which has a general solution involving Jacobian elliptical functions. The solution of the Taylor Goldstein equation captures the effects of the pycnocline. Internal wave packets with decayed oscillations as observed from satellite pictures are specifically modeled. The nonlinear internal waves are characterized by wave amplitudes that can exceed 50 ms and the present of shearing currents near the layer of pycnocline. The offshore drilling system is exposed to these current shears and the associated movements of large volumes of water. The effect of internal waves on drilling systems is studied through nonlinear fully coupled time domain analysis. The numerical model is implemented in a coupled analysis program where the hull, moorings and riser are considered as an integrated system. The program is then utilized to study the effects of the internal wave on the platform global motions and drilling system integrity. The study could be useful for future guidance on offshore exploration and drilling operations in areas where the internal wave phenomenon is prominent.

scholarly journals A Kinematic Collision Box Algorithm Applied for the Anti-Collision System of Offshore Drilling Vessels

2020 ◽  
Vol 8 (6) ◽  
pp. 420 ◽  
Author(s):  
Duy Thanh Nguyen ◽  
Kwang Hyo Jung ◽  
Ki-Youn Kwon ◽  
Namkug Ku ◽  
Jaeyong Lee
Keyword(s):  
Collision Avoidance ◽  
Maximum Velocity ◽  
Collision System ◽  
Time Data ◽  
Offshore Drilling ◽  
Visual Model ◽  
Bounding Box ◽  
Drilling System ◽  
And Robotics ◽  
Conventional Algorithm

With the advances in technology and the automation of drilling platforms, the Anti-Collision System (ACS) has appeared as an affordable technology, which is intended to keep equipment on the drilling floor working harmoniously and to prevent the potential hazards associated with accidents. However, the specialty of the machinery on the drilling floor requires a distinguished structure for the ACS and a reliable collision-avoidance algorithm, which is not similar to any algorithm in other applications, such as automobiles and robotics. The aim of this paper is to provide a comprehension of the configuration of an ACS in an Integrated Drilling System and to develop a practical anti-collision algorithm that can be applied to the machine arrangement for an offshore drilling operation. By analyzing the motions and using kinematic parameters, such as the speed and deceleration information of drilling equipment, a kinematic collision box algorithm is developed to eliminate the limitation of conventional algorithms. While the conventional collision-avoidance algorithm uses a collision box with fixed size, the kinematic collision box algorithm uses a collision box with a flexible scale that can be correspond to the velocity and deceleration rate of the equipment. Several operating scenarios are simulated by a visual model of ACS to authenticate the functionality of the proposed algorithm. The operation of the top drive is an outstanding scenario. Only 2.25 s are required to stop the top drive from its maximum velocity, and a conventional algorithm uses this number to create a fixed bounding box. Also, the kinematic collision box algorithm uses the real-time data of velocity and acceleration to adjust the scale of the bounding box when the speed of the top drive increases from 0 to its maximum value. The simulation result illustrates the reliability and advances of the kinematic collision box algorithm in performing the collision-avoidance function in ACS compared to the conventional algorithm.

Managed Pressure Drilling System Provided Value to Offshore Drilling Operation

2015 ◽  
Author(s):  
James Onifade ◽  
Bhavin Patel ◽  
Engin Ertas ◽  
Essam Sammat ◽  
Benhur Sahin
Keyword(s):  
Offshore Drilling ◽  
Drilling Operation ◽  
Managed Pressure Drilling ◽  
Drilling System

Development of Automated Offshore Drilling System

1990 ◽  
Author(s):  
H. Fujita ◽  
M. Sato ◽  
N. Shiraishi ◽  
Y. Wakiya ◽  
S. Tanaka
Keyword(s):  
Offshore Drilling ◽  
Drilling System

Design and Research of Offshore Drilling Platform Electric Power System

2014 ◽  
Vol 986-987 ◽  
pp. 915-918
Author(s):  
Ping Liang Chen
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Electrical Power ◽  
Electric Power System ◽  
Electrical Power System ◽  
Offshore Drilling ◽  
Electric System ◽  
Engineering Software ◽  
Short Circuit Calculation ◽  
Drilling System

In order to design a reasonable safe power control system and realize the automated management of offshore drilling system, this paper analyzes the electric system features and grid configuration of drilling platform; power station design and short circuit calculation; electrical power system electroplax selection. This system adopts oceanographic engineering software EDSA for construction and parameter input and conducts short-circuit calculation for modeling and simulation. The electric system design and short-circuit calculation can be examined by simulation result and real platform.

Understanding of Offshore Drilling System and Trend Analysis

2013 ◽  
Vol 1 (1) ◽  
pp. 33-38
Author(s):  
Nam-Sub Woo ◽  
Jae-Ki Kwon ◽  
Jong-Myung Park ◽  
Sang-Shik Kim ◽  
Young-Ju Kim
Keyword(s):  
Trend Analysis ◽  
Offshore Drilling ◽  
Drilling System

Safety barriers analysis of offshore drilling system by employing Fuzzy Event Tree Analysis

2015 ◽  
Vol 78 ◽  
pp. 49-59 ◽  
Author(s):  
Nahid Ramzali ◽  
Mohammad Reza Miri Lavasani ◽  
Jamal Ghodousi
Keyword(s):  
Event Tree ◽  
Offshore Drilling ◽  
Event Tree Analysis ◽  
Tree Analysis ◽  
Safety Barriers ◽  
Fuzzy Event ◽  
Drilling System

Bone Density Classification Method for Robotic Drilling System

2013 ◽  
Vol 133 (3) ◽  
pp. 328-334 ◽  
Author(s):  
Koyo Yu ◽  
Yuki Saito ◽  
Yusuke Kasahara ◽  
Hiromasa Kawana ◽  
Shin Usuda ◽  
...  
Keyword(s):  
Bone Density ◽  
Classification Method ◽  
Robotic Drilling ◽  
Drilling System

Method for the mobile offshore drilling units contracting probability assessment

2018 ◽  
pp. 20-23
Author(s):  
I.P. Zaikin ◽  
◽  
K.V. Kempf ◽  
R.R. Naboka ◽  
V.A. Guregyants ◽  
...  
Keyword(s):  
Probability Assessment ◽  
Offshore Drilling
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