Technologies for Monitoring the Dynamics of Damage Development in Drilling Rigs Using High-Order Moments of the Noise

2020 ◽  
Vol 21 (4) ◽  
pp. 213-223
Author(s):  
T. A. Aliev ◽  
N. F. Musaeva ◽  
B. I. Gazizade
Keyword(s):  
Latent Period ◽  
Technical Condition ◽  
High Order ◽  
Damage Development ◽  
Vibration Signals ◽  
Damage Initiation ◽  
Drilling Rig ◽  
Noise Characteristics ◽  
Wide Range ◽  
Drilling Rigs

The paper deals with the development of algorithms for calculating the high-order moments of the noise of noisy signals and their use in the analysis of the technical condition of industrial facilities. It is shown that for monitoring and controlling the onset of an emergency at oil production facilities, random vibration signals are used, which, in addition to the noise caused by external factors at the time of the initiation of the malfunction, also contain additional noise. The characteristics of this noise contain certain information about the technical condition of the drilling rig. Earlier, algorithms were developed for calculating the variance, standard deviation, and density distribution function of the noise that cannot be separated from the noisy signal. In this paper, it is shown that high-order moments of the noise can be used as a diagnostic indicator for determining the presence and degree of damage development in drilling rigs during the latent period of damage initiation. Possible options for calculating the high-order moments of the noise are analyzed. Recursive algorithms are developed for expressing high-order moments of a normally distributed noise through its variance. The possibility of calculating the high-order moments of the noise through the distribution density functions is also shown. A matrix consisting of estimates of the high-order moments of the noise calculated at different instants of time is built. It is shown that at the first stage, it is possible to determine the presence and degree of the damage based on the values of the matrix elements. At the second stage, the intensity of damage development is determined by comparing the values of the noise characteristics at different instants of time. Calculations are performed for all signals coming from the sensors. Training is carried out and, the correspondence is established between the values of the high-order moments and degrees and intensity of damage development. The possibility of using the proposed algorithms and technologies in the system of noise control of the beginning and development dynamics of accidents at drilling rigs is shown. It is noted that even if the estimates of the high-order moments of the sum noisy vibration signals change within a wide range during drilling, their high-order noise moments do not exceed a predetermined value in the absence of a malfunction. In the event of a malfunction, the estimates of the highorder moments of the noise exceed the predetermined threshold level and, as the defect develops, their values also change. If adverse processes are stabilized, the variation of these estimates stops as well. Moreover, depending on the degree and intensity of stabilization of the technical condition of the drilling rig, the change in the estimates of the moments, starting from the highest to the lowest or vice versa, stops one by one. This specific feature of estimates of high-order noise moments of vibration signals allows us to identify the beginning and to control the development dynamics of the latent period of an emergency state of the drilling process. 

Problems in diagnostics and forecasting for the resource of wire ropes in drilling rigs

2020 ◽  
pp. 100-109
Author(s):  
V. V. Piven ◽  
E. Yu. Moskvina ◽  
V. V. Pivdiablyk
Keyword(s):  
Operating Time ◽  
Flaw Detection ◽  
Complex Stress ◽  
Technical Condition ◽  
Wire Rope ◽  
Detection Methods ◽  
Drilling Rig ◽  
Scientific Technical ◽  
Accuracy Increase ◽  
Drilling Rigs

Continuous monitoring of the rig's technical condition is necessary for efficient use of the rig's wire rope resource. A classification of steel ropes used in the industry has been compiled. The characteristics of the pulley-block rope pulley to power drilling rigs are given. The analysis of recommendations for the selection and operation of rope hoists is carried out. The reasons for the occurrence of complex stress-strain states of the rope during its operation are considered. The analysis of methods for calculating the load-bearing capacity of wire rope and determining the fatigue strength is given. Comparative data on the actual standard operating time of wire rope are given. The scientific problem of predicting the residual resource of wire rope is analytically investigated. For operational control of defects in steel ropes, the prospects of using magnetic flaw detection methods are considered. The article draws our attention to the need to implement the following scientific, technical, and technological solutions, such as improving the design of pulley-block system of drilling rigs; accuracy increase of diagnosis of technical condition and forecasting of resource strings; maintenance of wire rope; this will contribute to a more complete use of wire rope in drilling rig.

Algorithms for Constructing the Confidence Interval for the Mathematical Expectation of the Noise and their Application in the Control of the Dynamics of Accident Development

2020 ◽  
Vol 21 (9) ◽  
pp. 521-529
Author(s):  
T. A. Aliev ◽  
N. F. Musaeva ◽  
M. T. Suleymanova
Keyword(s):  
Confidence Interval ◽  
Latent Period ◽  
Mathematical Expectation ◽  
Control Object ◽  
Gas Production ◽  
Noisy Signal ◽  
Damage Development ◽  
Technical Object ◽  
Repair Work ◽  
Noise Characteristics

The paper deals with the development of algorithms for constructing the confidence interval for the mathematical expectation of the noise of a noisy signal. It is noted that the noise characteristics can be used as informative attributes of the beginning of the initiation of a defect in a technical object. It is also indicated that the problem of determining the dynamics of changes in the technical condition  of an  object is more important than the control of the onset of a malfunction. This is based on the fact that with a slight development of a malfunction or lack of development, there is no need to stop the object’s operation for repair. In contrast, strong dynamics of development of a defect requires urgent action. It is noted that a timely solution to this problem is especially relevant for oil and gas production facilities and other similar facilities. It is shown that confidence intervals for the noise characteristics of a noisy signal can be used as informative attributes of determining the dynamics of a malfunction. Algorithms for determining the confidence interval for the mathematical expectation of the noise are developed. Technologies are proposed for determining the latent period of the initiation of the malfunction of  technical  objects  and  the  dynamics  of  its  development  using  the  confidence  interval  for  the  mathematical  expectation of the noise. To this end, at the instant of time when the object is in a normal state, a confidence interval is constructed for the mathematical expectation of the noise, and a set of possible values that fall into this interval is compiled. After a certain period of time, this procedure is repeated. It is noted that when a malfunction occurs, the width of the confidence  interval increases. Therefore, the difference between the sets of possible values of the mathematical expectation of the noise at the previous and current instants is found. A correspondence is established between the value of this difference and the degree of damage development. By determining each time the differences of the sets of possible values of the mathematical expectation of the noise, the dynamics of the development of the malfunction in time is revealed. Then the corresponding conclusions are made, such as "the malfunction develops with uniform intensity", "the malfunction develops intensively", "the malfunction develops very intensively", etc. Depending on the degree of malfunction development, appropriate preventive or repair work is carried out with or without stopping the operation of the control object. To verify the reliability of the developed algorithm for constructing the confidence interval for the mathematical expectation of the noise of a noisy signal and the technology for determining the latent period of initiation of malfunction of technical objects and the dynamics of its development, computational experiments are carried out using the MATLAB computing environment.

scholarly journals The Use of Acoustic Emission Elastic Waves for Diagnosing High Pressure Mud Pumps Used on Drilling Rigs

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1138
Author(s):  
Artur Bejger ◽  
Tomasz Piasecki
Keyword(s):  
High Pressure ◽  
Signal Processing ◽  
Acoustic Emission ◽  
Wavelet Packet ◽  
Technical Condition ◽  
Drilling Rig ◽  
Invasive Method ◽  
Pump Valve ◽  
Drilling Rigs ◽  
Frequency Band Energy

Although mud pumps are vital components of a drilling rig, their failures are frequent. The identification of technical condition of these high-pressure piston pumps is difficult. There are no reliable criteria for the assessment of mud pump condition. In this paper, faults of the pump valve module are identified by means of acoustic emission (AE) signals. The characteristics of these signals are extracted by wavelet packet signal processing. This method has been verified by experiments conducted on a NOV (National Oilwell Varco) -made triplex 14-P-220 mud pump (mounted in the drillship). The results show that the wavelet packet signal processing method can effectively extract the frequency band energy eigenvalues of the signals. Besides, some operational problems associated with high pressure piston mud pumps are presented. A non-invasive method for diagnosing the technical condition of such pumps is being developed at the Maritime University of Szczecin.

Numerical Simulations of Ocean Drilling System Behavior With a Surface or a Subsea BOP in Waves and Current

2008 ◽  
Author(s):  
Celso K. Morooka ◽  
Raphael I. Tsukada ◽  
Dustin M. Brandt
Keyword(s):  
System Behavior ◽  
Traditional System ◽  
Drilling Rig ◽  
Advantages And Disadvantages ◽  
Ocean Drilling ◽  
Sea Bottom ◽  
Drilling System ◽  
Drilling Rigs ◽  
High Level ◽  
Drilling Bit

Subsea equipment such as the drilling riser and the subsea Blow-Out Preventer (BOP) are mandatory in traditional systems used in deep sea drilling for ocean floor research and petroleum wellbore construction. The drilling riser is the vertical steel pipe that transfers and guides the drill column and attached drilling bit into a wellbore at the sea bottom. The BOP is used to protect the wellbore against uncontrolled well pressures during the offshore drilling operation. Presently, there is a high level of drilling activity worldwide and in particular in deeper and ultra-deeper waters. This shift in depth necessitates not only faster drilling systems but drilling rigs upgraded with a capacity to drill in the deep water. In this scenario, two general drilling systems are today considered as alternatives: the traditional system with the subsea BOP and the alternate system with the surface BOP. In the present paper, the two systems are initially described in detail, and a numerical simulation in time domain to estimate the system behavior is presented. Simulations of a floating drilling rig coupled with the subsea and surface BOP in waves and current are carried out for a comparison between the two methods. Results are shown for riser and BOP displacements. Critical riser issues for the systems are discussed, comparing results from both drilling system calculations. Conclusions are addressed showing advantages and disadvantages of each drilling system, and indicating how to correct the problems detected on each system.

scholarly journals Fault Diagnosis of Rolling Bearing Based on a Novel Adaptive High-Order Local Projection Denoising Method

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Rui Yuan ◽  
Yong Lv ◽  
Gangbing Song
Keyword(s):  
Fault Diagnosis ◽  
Numerical Simulations ◽  
Rolling Bearing ◽  
High Order ◽  
Rolling Bearings ◽  
Theoretical Derivation ◽  
Denoising Method ◽  
Vibration Signals ◽  
Local Projection ◽  
Ring Fault

Rolling bearings are vital components in rotary machinery, and their operating condition affects the entire mechanical systems. As one of the most important denoising methods for nonlinear systems, local projection (LP) denoising method can be used to reduce noise effectively. Afterwards, high-order polynomials are utilized to estimate the centroid of the neighborhood to better preserve complete geometry of attractors; thus, high-order local projection (HLP) can improve noise reduction performance. This paper proposed an adaptive high-order local projection (AHLP) denoising method in the field of fault diagnosis of rolling bearings to deal with different kinds of vibration signals of faulty rolling bearings. Optimal orders can be selected corresponding to vibration signals of outer ring fault (ORF) and inner ring fault (IRF) rolling bearings, because they have different nonlinear geometric structures. The vibration signal model of faulty rolling bearing is adopted in numerical simulations, and the characteristic frequencies of simulated signals can be well extracted by the proposed method. Furthermore, two kinds of experimental data have been processed in application researches, and fault frequencies of ORF and IRF rolling bearings can be both clearly extracted by the proposed method. The theoretical derivation, numerical simulations, and application research can indicate that the proposed novel approach is promising in the field of fault diagnosis of rolling bearing.

scholarly journals Development trends of outboard launchers for unmanned underwater vehicles and marine underwater weapons from underwater carriers (based on materials from open publications)

2020 ◽  
Author(s):  
В.О. Боярчик ◽  
В.Г. Михлин ◽  
А.А. Румянцев ◽  
Р.А. Урусов
Keyword(s):  
Rapid Development ◽  
Underwater Vehicles ◽  
Technical Condition ◽  
Mineral Deposits ◽  
Development Trends ◽  
Unmanned Underwater Vehicles ◽  
Mining Sites ◽  
Special Place ◽  
Wide Range ◽  
Technical Solutions

Принимая во внимание бурное развитие морской подводной техники для разведки и добычи полезных ископаемых со дна Мирового океана, которое невозможны без широкого использования необитаемых подводных аппаратов (НПА), вопросы, связанные с их отделением от носителя, становятся, несомненно, актуальными. Среди широкой номенклатуры подводных аппаратов, используемых для этих целей, особое место занимают НПА торпедообразной формы. К основной их миссии относят вопросы разведки мест залегания полезных ископаемых, освещения подводной обстановки при проведении работ, а также вопросы контроля технического состояния оборудования, оснащения мест добычи ископаемых, а также охраны района. В статье анализируются тенденции развития забортных пусковых установок, на основе открытых зарубежных и отечественных публикаций (статей, патентов, рекламных буклетов). Рассмотрены известные технические решения забортных пусковых установок и намечены наиболее перспективные направления развития пусковых установок. Taking into account the rapid development of marine underwater equipment for exploration and mining from the bottom of the oceans, which is impossible without the widespread use of unmanned underwater vehicles (UUV), issues related to their separation from the carrier are undoubtedly relevant. Among the wide range of underwater vehicles used for these purposes, a special place is occupied by torpedo-shaped UUV. Their main mission includes issues of exploration of mineral deposits, an overview of the underwater situation during work, as well as issues of monitoring the technical condition of equipment, equipping mining sites, as well as protecting the area. The article analyzes the development trends of overboard launchers based on open foreign and domestic publications (articles, patents, advertising booklets). The well-known technical solutions of overboard launchers are considered and the most promising directions for the development of launchers are outlined.

scholarly journals An experimental decomposition of nonlinear forces on a surface-piercing column: Stokes-type expansions of the force harmonics

2018 ◽  
Vol 848 ◽  
pp. 42-77 ◽  
Author(s):  
L. F. Chen ◽  
J. Zang ◽  
P. H. Taylor ◽  
L. Sun ◽  
G. C. J. Morgan ◽  
...  
Keyword(s):  
High Order ◽  
Quality Data ◽  
Wave Group ◽  
Wave Loading ◽  
Harmonic Force ◽  
Wave Basin ◽  
Wide Range ◽  
Time Histories ◽  
Focused Wave ◽  
Sloping Bed

Wave loading on marine structures is the major external force to be considered in the design of such structures. The accurate prediction of the nonlinear high-order components of the wave loading has been an unresolved challenging problem. In this paper, the nonlinear harmonic components of hydrodynamic forces on a bottom-mounted vertical cylinder are investigated experimentally. A large number of experiments were conducted in the Danish Hydraulic Institute shallow water wave basin on the cylinder, both on a flat bed and a sloping bed, as part of a European collaborative research project. High-quality data sets for focused wave groups have been collected for a wide range of wave conditions. The high-order harmonic force components are separated by applying the ‘phase-inversion’ method to the measured force time histories for a crest focused wave group and the same wave group inverted. This separation method is found to work well even for locally violent nearly-breaking waves formed from bidirectional wave pairs. It is also found that the $n$th-harmonic force scales with the $n$th power of the envelope of both the linear undisturbed free-surface elevation and the linear force component in both time variation and amplitude. This allows estimation of the higher-order harmonic shapes and time histories from knowledge of the linear component alone. The experiments also show that the harmonic structure of the wave loading on the cylinder is virtually unaltered by the introduction of a sloping bed, depending only on the local wave properties at the cylinder. Furthermore, our new experimental results reveal that for certain wave cases the linear loading is actually less than 40 % of the total wave loading and the high-order harmonics contribute more than 60 % of the loading. The significance of this striking new result is that it reveals the importance of high-order nonlinear wave loading on offshore structures and means that such loading should be considered in their design.

A new type of drilling rig powered by the Meissner effect

2020 ◽  
pp. 31-34
Author(s):  
O. M. Koryagina ◽  
E. S. Erastova ◽  
T. V. Skvortsova
Keyword(s):  
Economic Efficiency ◽  
Meissner Effect ◽  
Propulsion System ◽  
Drilling Rig ◽  
New Type ◽  
Drilling Rigs

The article considers the use of the quantum levitation property of a superconductor for the modernization of a new type of drilling rig system. The diagrams of the propulsion system of the rig, on the basis of which conclusions are made about the profitability and economic efficiency of the drilling rig, are provided. The use of the quantum levitation effect can be rationally used in drilling rigs, increasing the efficiency by 9%.

Retrofitting Offshore Drilling Rigs with Islanded DC Grids and Energy Storage

2021 ◽  
Author(s):  
Stig Settemsdal ◽  
Saverio Ventrelli
Keyword(s):  
Energy Storage ◽  
Power Plant ◽  
Power Plants ◽  
Oil And Gas ◽  
Dynamic Performance ◽  
Wind Farms ◽  
Power Grids ◽  
Offshore Drilling ◽  
Drilling Rig ◽  
Drilling Rigs

Abstract The paper presents a novel approach for modernizing/retrofitting offshore drilling rig power plants with islanded direct current (DC) power grids and energy storage. The concept has been successfully applied on several offshore rigs which are in operation today and is applicable to jack-ups, semi-submersibles, drill ships, as well as other types of marine support vessels for oil and gas platforms and wind farms. The approach aims to enhance the feasibility of leveraging energy storage solutions on offshore drilling rigs and marine vessels by making use of the existing power plant footprint. Unique measures have also been incorporated into the electrical system architecture to ensure that the reliability and safety of the existing alternating current (AC)-based system are not compromised. This enables operators to capitalize on the numerous benefits of energy storage (e.g., reduced emissions, enhanced dynamic performance for drilling and dynamic positioning, etc.) without having to perform a "rip and replace" of the entire power plant and electrical infrastructure.

Cyberdefence of Offshore Deepwater Drilling Rigs

2021 ◽  
Author(s):  
Paola Rossi ◽  
Itai Sela ◽  
Adam Rizika ◽  
Diogenes Angelidis ◽  
Mark Duck ◽  
...  
Keyword(s):  
New Technology ◽  
Remote Access ◽  
Legacy Systems ◽  
Short Term ◽  
Deep Dive ◽  
Deepwater Drilling ◽  
Drilling Rig ◽  
Alternative Methodology ◽  
Drilling Rigs ◽  
Penetration Tests

Abstract An alternative methodology using new preventative technology to manage cybersecurity exposure on deepwater drilling rig assets is presented. For the past two years Shell's Deepwater Wells business has been evaluating typical cyber defence approaches and undertaken cybersecurity risk assessments and penetration tests. These activities have demonstrated the challenges attaining cybersecure drilling rig environments. Whilst cyberattacks increase in frequency, adaptability, and become cheaper to launch, regulatory and liability insurance requirements are also evolving. To achieve the goal of cyber-resilience, a major Operator has collaborated with a cybersecurity firm to trial technology for rapidly and reliably protecting deepwater rigs. The paper presents aspects of the numerous challenges faced and offers a different approach using new technology applied to both supplement and accelerate the attainment of a cyber-resilient environment onboard deepwater drilling rigs. It shares the deep dive lessons learnt leading to a more comprehensive understanding of how to protect drilling rigs and their safety critical control systems. Aside from addressing technical attributes using risk vs. maturity based methods, the approach also caters to business demands of short term rig contracts, managing multi-vendor legacy systems and satisfying increasing digitalisation/remote access needs with associated reductions in overall cybersecurity CAPEX spend.

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