Investigation of the Influence of Screw Connections in Drill-Strings on the Propagation of Torsional Waves With Respect to Advanced Stick-Slip Controllers

2014 ◽  
Author(s):  
Edwin Kreuzer ◽  
Ludwig Krumm ◽  
Marc-André Pick
Keyword(s):  
Numerical Simulations ◽  
Oil And Gas ◽  
Control Method ◽  
Oil And Gas Industry ◽  
Drill String ◽  
Apparent Difference ◽  
Geothermal Resources ◽  
Stick Slip ◽  
Gas Industry ◽  
Drilling Rig

Drill strings are used in the oil and gas industry to search for oil, gas, and geothermal resources and form extremely slender structures which makes them very sensitive to torsional and other vibrations. In order to immensely reduce torsional vibrations along the whole string, a wave based control method was developed at our institute. Numerical simulations and tests at an experimental setup showed very good results, but the implementation in a real drilling rig has not yet been taken place. One apparent difference in a real drill string will be the assembly of many rather short drill pipes, which is unregarded in conventional models and our small test rig. This might lead to improper behavior of our wave based control mechanism and shall be investigated is this paper. We present a model that accounts for a discontinuously built drill string and show the consequences for our advanced control method via numerical simulations.

Automated Well Control: From Automated Detection to Automated Shut-In

2021 ◽  
Author(s):  
Bryan Wade Atchison
Keyword(s):  
Oil And Gas ◽  
New Technologies ◽  
Oil And Gas Industry ◽  
Drill String ◽  
Step Change ◽  
Innovative Technology ◽  
Environmental Damage ◽  
Gas Industry ◽  
Well Control ◽  
Drilling Rig

Abstract Objectives April 2010 in the Gulf of Mexico and January 2017 in Oklahoma brought into sharp focus what can happen if the oil and gas industry gets well control wrong: 16 fatalities, significant environmental damage, loss of assets and reputation. Each year we have multiple blowouts and several fatality events due to a loss of well control. The oil and gas industry can improve from a personnel safety, environmental and reputation perspective. The Automation of Well Control will bring a significant step change in the area of Process Safety forwells. It prevents blowouts, reduces all influx volumes, minimising kicktolerance volumes and reducingcasing and well costs. Method A system has been developedwhich enables Automated Well Control whilst in drilling mode. Pre-determined influx rates, agreed by the operator and drilling contractor, and input by the driller are established. Once the system detects the influx, it performs a series of operations by taking control of the drilling rig equipment. The drill string is spaced out, top drive and mud pumps are stopped, and the BOP is closed. All of this occurs without the driller doing anything; however, he can intervene at any moment. Thissystem is designed as an aid to the driller and does not remove his responsibility. Results The Automated Well Control system has been tested on drilling simulators with real drillers. Comparisons tests have shown that the technology enables shut-in times faster than conventional human interface methods, with influx volumes typically 10-20% of those experienced during manual shut-in. Additionally, a full Field Trial using a traditional rigdemonstrated the effectiveness of the system, proving up the functionality under different operational requirements. The system can now be applied to any type of rig worldwide. Over 50 potential modules have been identified. Planned developments forthe system include circulatingout the kick automatically, shut-in for tripping, circulating, cementing and in-flow testing. It provides assurance for afast, safe and effective shut-in.A full Technology Qualification process has been used for this technology. Innovative Technology Over the past 20 years, technology advancements associated with simulators and cyber-rigs have enabled new technologies to be developed. One of these technologies is Automated Well Control. It is believed that this innovative system will enable a step change in the performance ofprocess safety forwell control, dramaticallyreducing major accident hazards, thereby saving millions of dollars per well, reducing environmental impact and preventing loss of life.

Stress and Displacements Analysis for Drilling Mast Elements Made of Rectangular Pipe: The Overload Test Case

2014 ◽  
Vol 601 ◽  
pp. 120-123 ◽  
Author(s):  
Ioan Popa ◽  
Lavinia Silvia Stanciu
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Drill String ◽  
Point Of View ◽  
Test Case ◽  
Gas Industry ◽  
Drilling Rig ◽  
Drill Pipes ◽  
Hoisting System ◽  
Indeterminate Structures

In the oil and gas industry, the drilling masts are complex metallic constructions made of welded ends beams, which can be classified, from a mechanical point of view, in the statically indeterminate structures` category. The drilling mast is a part of the hoisting system of a drilling rig and its main purposes are: to support some devices as the crown block at the top, the crane, the rotary swivel etc and to provide support for the drill pipes to be stacked vertically during the round trips operations, which implies the operation of removing the drill string from the wellbore or running it back in the hole.

Quantifying Economic Uncertainties and Risks in the Oil and Gas Industry

2021 ◽  
pp. 154-184
Author(s):  
Sorin Alexandru Gheorghiu ◽  
Cătălin Popescu
Keyword(s):  
Business Performance ◽  
Oil And Gas ◽  
Water Injection ◽  
Oil And Gas Industry ◽  
Oil Field ◽  
Gas Industry ◽  
Field Development ◽  
Drilling Rig ◽  
Oil Field Development ◽  
Oil Gas

The present economic model is intended to provide an example of how to take into consideration risks and uncertainties in the case of a field that is developed with water injection. The risks and uncertainties are related, on one hand to field operations (drilling time, delays due to drilling problems, rig failures and materials supply, electric submersible pump [ESP] installations failures with the consequences of losing the well), and on the other hand, the second set of uncertainties are related to costs (operational expenditures-OPEX and capital expenditures-CAPEX, daily drilling rig costs), prices (oil, gas, separation, and water injection preparation), production profiles, and discount factor. All the calculations are probabilistic. The authors are intending to provide a comprehensive solution for assessing the business performance of an oil field development.

scholarly journals Drillstring Failure: Analytical and Experimental Approach

2019 ◽  
Vol 300 ◽  
pp. 04004
Author(s):  
Edris Hassan ◽  
Jamil Abdo ◽  
Jan Kwak ◽  
Abdullah Al Shabibi
Keyword(s):  
Torsional Vibration ◽  
Oil And Gas ◽  
Drill Pipe ◽  
Oil And Gas Industry ◽  
Drill String ◽  
Design Parameters ◽  
Experimental Investigations ◽  
Torsional Vibrations ◽  
Stick Slip ◽  
The Impact

Drilling is one of the costliest activities in oil and gas industry due to the complexity of interactions with downhole rock formation. Under such conditions, the uncertainty of drillstring behaviour increase and hence it becomes difficult to predict the causes, occurrences, and types of failures. Lateral and torsional vibrations often cause failure of Bottom Hole Assembly (BHA), drillstring failure, drill bit and wall borehole damages. In this work, a model is presented to determine the impact of lateral and torsional vibrations on a drillstring during the drilling operation. The model aims to mimic real drillstring behaviour inside a wellbore with regards to its dynamic movements due to multiple real situations such as eccentricity of collars, drill pipe sections, and stick-slip phenomena occurring due to the interaction of the bit and the drillstring with the well formation. The work aims to develop a basis for determining critical operating speeds and design parameters to provide safe drilling procedures and reduce drill string fatigue failure. Lagrangian approach is used in this study to attain drillstring lateral and torsional vibration coupling equations. The nonlinear equations are solved numerically to obtain the response of the system. In this work, we also present a brief description of an in-house constructed experimental setup. The setup has the capability to imitate the downhole lateral and torsional vibration modes. Parameters from the experimental investigations are incorporated for validation of the mathematical models and for prediction of the drillstring fatigue life. Such investigations are essential for oil and gas industries as they provide solutions and recommendations about operational speed, lateral and torsional amplitudes measurements and corrections, and the conditions for avoiding occurrence of natural frequencies of the system.

scholarly journals Pipeline Performances under Earthquake-Induced Soil Liquefaction: State of the Art on Real Observations, Model Tests, and Numerical Simulations

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Massimina Castiglia ◽  
Tony Fierro ◽  
Filippo Santucci de Magistris
Keyword(s):  
Seismic Hazard ◽  
Numerical Simulations ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Model Tests ◽  
Soil Liquefaction ◽  
Case Histories ◽  
Gas Industry ◽  
Experimental Modelling ◽  
Level Of Knowledge

The design and the manufacture of the oil and gas pipelines are being improved over the years in response to the observed damages and related disastrous effects. The improvements are possible, thanks to the increasing knowledge about pipeline performances in specific contexts. The seismic hazard on buried pipelines has always been of major concern, and the earthquake-induced soil liquefaction effects are among the most important issues to be accounted for in the design. Experiences based on case histories, experimental modelling, and numerical simulations represent the source of understanding of the involved mechanisms, the affecting parameters, and the structure response. Recently, all these aspects are becoming more accurate, thanks to the use of monitoring systems. The protection of pipelines from the seismic hazard is a crucial and challenging issue. This paper provides an overview of the research that has been conducted over the years in the specific framework of soil liquefaction phenomenon. Case histories on pipeline performances, commonly adopted analytical methods, and results of model tests and numerical simulations are summarized with main focus on the level of knowledge achieved up to date and the existing limitations that represent open issues for further development of the research. This study represents a useful background to be adopted from academics and practitioners in order to enhance the methods of analyses of the pipelines, thus improving their performances in the applications of the oil and gas industry.

Drillstring Vibration Observation, Modeling and Prevention in the Oil and Gas Industry

2014 ◽  
Author(s):  
Roman J. Shor ◽  
Mitch Pryor ◽  
Eric van Oort
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Vibrational Modes ◽  
Stick Slip ◽  
Gas Industry ◽  
The Past ◽  
Bit Wear ◽  
Modes Of Vibration ◽  
Dynamics Models ◽  
Downhole Sensors

As well designs become increasingly complicated, a complete understanding of drillstring vibrations is key to maximize drilling efficiency and reduce bit wear as well as prevent drillstring, tool, and borehole damage. This paper presents a review of the past fifty years of work on drillstring dynamics models and the proposed and accepted vibration mitigation applications within the drilling industry. Early modeling began with simplistic models in efforts to understand downhole processes. Once downhole sensors were deployed and the basic modes of vibration were understood, proprietary systems were developed and — only recently — successfully deployed to detect and mitigate the effects of certain undesired vibrational modes, specifically stick-slip torsional vibrations. Future systems and their effectiveness will depend on a refined understanding of the various modes of vibration and their interaction, as well as improved real-time downhole sensing techniques. Implementation of high-fidelity models to deduce and correct the downhole drillstring state will subsequently improve the operational drilling efficiency.

scholarly journals Technology and Developing Trends of Automatic Catwalk in China’s Drilling Rigs

2018 ◽  
Vol 6 (07) ◽  
Author(s):  
Nilievna Nkanza ◽  
Feng Ding ◽  
Sun Qiaolei ◽  
Tu Yiliu
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Development Trend ◽  
Well Drilling ◽  
Gas Industry ◽  
Drilling Rig ◽  
Automation Equipment ◽  
Drilling Rigs ◽  
Automation Technology ◽  
The Development Trend

The Improvement of automation technology and its application in drilling rig have increased the drilling rig safety and efficiency. The petroleum drilling rig in China has been increasing as China is the fourth-leading oil producer in the oil and gas industry. However, there is a low percentage of automation equipment and the automatic catwalk still remains at the traditional stage compared to other countries. This paper introduced the present situation of the domestic well drilling rig, automatic catwalk technologies and the development trend is summarized.

scholarly journals Proportional-Derivative Control of Stick-Slip Oscillations in Drill-Strings

2018 ◽  
Vol 148 ◽  
pp. 16005 ◽  
Author(s):  
Wei Lin ◽  
Yang Liu
Keyword(s):  
Oil And Gas ◽  
Control Method ◽  
Drill String ◽  
Nonlinear Friction ◽  
Stick Slip ◽  
Gas Drilling ◽  
Drilling Parameters ◽  
Highly Nonlinear ◽  
Proportional Derivative Controller ◽  
Rock Bit

Stick-slip oscillation in drill-string is a universal phenomenon in oil and gas drilling. It could lead to the wear of drill bit, even cause catastrophic failure of drill-strings and measurement equipment. Therefore, it is crucial to study drilling parameters and develop appropriate control method to suppress such oscillation. This paper studies a discrete model of the drill-string system taking into account torsional degree-of-freedom, drill-string damping, and highly nonlinear friction of rock-bit interaction. In order to suppress the stick-slip oscillation, a new proportional-derivative controller, which can maintain drill bit’s rotation at a constant speed, is developed. Numerical results are given to demonstrate its efficacy and robustness.

scholarly journals Suppression of Drill-String Stick-Slip Vibration

2018 ◽  
Vol 148 ◽  
pp. 16008 ◽  
Author(s):  
Vahid Vaziri ◽  
Marcin Kapitaniak ◽  
Marian Wiercigroch
Keyword(s):  
Sliding Mode Control ◽  
Control Method ◽  
Sliding Mode ◽  
Drill String ◽  
The Novel ◽  
Stick Slip ◽  
Drilling Rig ◽  
Mode Control ◽  
Drill Bits ◽  
The University

We investigate experimentally and numerically suppression of drill-string torsional vibration while drilling by using a sliding mode control. The experiments are conducted on the novel experimental drilling rig developed at the University of Aberdeen [1] and using PDC commercial drill-bits and real rock-samples. A mathematical model of the experimental setup which takes into account the dynamics of the drill-string and the driving motor, is proposed. Then a sliding mode control method is employed to suppress stick-slip oscillations. The experimental and numerical results considering a time delay of the actuator are in a close agreement. Stick-slip vibration is eliminated and significant reduction in vibration amplitude has been observed when using the controller.

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