The algorithm for determining the pulling force while dragging a pipeline

2018 ◽  
Vol 13 (3) ◽  
pp. 36-41
Author(s):  
I.N Krioni ◽  
A.V. Semenova ◽  
V.N. Kireev
Keyword(s):  
Mathematical Model ◽  
Drag Force ◽  
Drilling Fluid ◽  
Tractive Effort ◽  
Frictional Forces ◽  
Pulling Force

This article describes the process of dragging a pipeline through a channel. In the simulation of this process, the interactions between the pipeline, the drill rod, the soil and the bentonite mud are taken into account. Dragging of the pipeline through the well is hampered by frictional forces of the pipeline and the drill rod against the soil, as well as the drag force of the pipeline when it moves in the drilling fluid. In the construction of a mathematical model, the influence of these forces is taken into account. To determine the frictional forces, the pipeline and the drill rod were considered as a flexible non-stretch filament. An algorithm for determining the tractive effort is created and implemented. A separate stage of the work is devoted to the accounting of ballasting of the pipeline.

scholarly journals Analysis of the vibratory cultivator operation

2021 ◽  
Vol 7 (Special) ◽  
pp. 4-4
Author(s):  
Andrey Ivanov ◽  
◽  
Stanislav Trofimov
Keyword(s):  
Vibration Frequency ◽  
Traction Force ◽  
Body System ◽  
Soil Pressure ◽  
Important Indicator ◽  
Tractive Effort ◽  
Two Factors ◽  
Frictional Forces ◽  
Pulling Force ◽  
Soil Metal

Vibration can significantly reduce the pulling force of machines. The crushing of the soil increases with the frequency of vibration of the organ, and it was found that the size of the pieces of soil depends on the ratio of the speed of the aggregate to the frequency of vibration of the organ. In addition, traction and fuel consumption are reduced compared to machines without vibrating implements. Reduced tractive effort is the most important indicator of the effectiveness of the use of vibrating tools. The purpose of the study is to study the effect of applying vibrations at different frequencies to a cultivator on its performance, as well as oscillatory motion at two frequencies and with constant amplitudes on the traction force of the working body and soil properties. It can be noted that the effect of vibration frequency on tractive effort is more important than the depth of tillage. These two factors are the main and most significant in terms of tractive effort. Working depth also has a significant effect on tractive power. It increases to 54% with an increase in the working depth from 100 to 200 mm. The result is the same with a depth of 300 to 400 mm. An increase in tractive effort occurs due to a higher additional soil pressure and an increase in frictional forces in the "soil-metal surface of the working body" system. Keywords: TILLAGE; OSCILLATORY MOVEMENTS; LOOSENING THE SOIL; VIBRATION

MODELING OF THE DYNAMIC PROCESS RELEASE OF STUCK DRILLING TOOLS BY HYDRO-PULSE METHOD

2019 ◽  
pp. 94-103
Author(s):  
K. H. Levchyk ◽  
M. V. Shcherbyna
Keyword(s):  
Mathematical Model ◽  
Dynamic Process ◽  
Drilling Fluid ◽  
Pulse Method ◽  
Geometrical Parameters ◽  
Technical Solution ◽  
Rock Layer ◽  
Drilling Tool ◽  
Drilling Tools ◽  
Drill Pipes

A technical solution is proposed for the elimination the grabbing of drilling tool, based on the use of energy due to the circulation of the drilling fluid. The expediency eliminating the grabbing drilling tool using the hydro-impulse method is substantiated. A method of drawing up a mathematical model for the dynamic process of a grabbing string of drill pipes in the case of perturbation of hydro-impulse oscillations in the area of the productive rock layer is developed. The law of longitudinal displacements arising in the trapped string is obtained, which allows choosing the optimal geometrical parameters of the passage channels and the frequency rotational of shutter for these channels. Recommendations for using this method for practical use have been systematized.

Analysis and optimisation of a bearingless induction motor's suspension force and unbalanced magnetic pulling force mathematical model

2020 ◽  
Vol 14 (7) ◽  
pp. 1247-1255
Author(s):  
Zebin Yang ◽  
Qifeng Ding ◽  
Xiaodong Sun ◽  
Qian Zhao ◽  
Jiasheng Luo
Keyword(s):  
Mathematical Model ◽  
Pulling Force

scholarly journals Nanofluid flow containing carbon nanotubes with quartic autocatalytic chemical reaction and Thompson and Troian slip at the boundary

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Muhammad Ramzan ◽  
Jae Dong Chung ◽  
Seifedine Kadry ◽  
Yu-Ming Chu ◽  
Muhammad Akhtar
Keyword(s):  
Mathematical Model ◽  
Carbon Nanotubes ◽  
Drag Force ◽  
Chemical Reaction ◽  
Slip Velocity ◽  
Volume Fraction ◽  
Surface Drag ◽  
Nanofluid Flow ◽  
Velocity Parameter ◽  
The Impact

Abstract A mathematical model is envisioned to discourse the impact of Thompson and Troian slip boundary in the carbon nanotubes suspended nanofluid flow near a stagnation point along an expanding/contracting surface. The water is considered as a base fluid and both types of carbon nanotubes i.e., single-wall (SWCNTs) and multi-wall (MWCNTs) are considered. The flow is taken in a Dacry-Forchheimer porous media amalgamated with quartic autocatalysis chemical reaction. Additional impacts added to the novelty of the mathematical model are the heat generation/absorption and buoyancy effect. The dimensionless variables led the envisaged mathematical model to a physical problem. The numerical solution is then found by engaging MATLAB built-in bvp4c function for non-dimensional velocity, temperature, and homogeneous-heterogeneous reactions. The validation of the proposed mathematical model is ascertained by comparing it with a published article in limiting case. An excellent consensus is accomplished in this regard. The behavior of numerous dimensionless flow variables including solid volume fraction, inertia coefficient, velocity ratio parameter, porosity parameter, slip velocity parameter, magnetic parameter, Schmidt number, and strength of homogeneous/heterogeneous reaction parameters are portrayed via graphical illustrations. Computational iterations for surface drag force are tabulated to analyze the impacts at the stretched surface. It is witnessed that the slip velocity parameter enhances the fluid stream velocity and diminishes the surface drag force. Furthermore, the concentration of the nanofluid flow is augmented for higher estimates of quartic autocatalysis chemical.

First Worldwide Slim Coiled Tubing Logging Tractor Deployment

2021 ◽  
Author(s):  
Laurie S. Duthie ◽  
Hussain A. Saiood ◽  
Abdulaziz A. Al-Anizi ◽  
Norman B. Moore ◽  
Carol Correia
Keyword(s):  
Real Time ◽  
Electrical Power ◽  
Quality Of Data ◽  
Coiled Tubing ◽  
Creative Solutions ◽  
Electrical Submersible Pumps ◽  
Open Hole ◽  
Frictional Forces ◽  
Pulling Force ◽  
Factory Testing

Abstract Successful reservoir surveillance and production monitoring is a key component for effectively managing any field production strategy. For production logging in openhole horizontal extended reach wells (ERWs), the challenges are formidable and extensive; logging these extreme lengths in a cased hole would be difficult enough, but are considerably exaggerated in the openhole condition. A coiled tubing (CT) logging run in open hole must also contend with increased frictional forces, high dogleg severity, a quicker onset of helical buckling and early lockup. The challenge to effectively log these ERWs is further complicated by constraints in the completion where electrical submersible pumps (ESPs) are installed including a 2.4" bypass section. Although hydraulically powered coiled tubing tractors already existed, a slim CT tractor with real-time logging capabilities was not available in the market. In partnership with a specialist CT tractor manufacturer, a slim logging CT tractor was designed and built to meet the exceptional demands to pull the CT to target depth. The tractor is 100% hydraulically powered, with no electrical power allowing for uninterrupted logging during tractoring. The tractor is powered by the differential pressure from the bore of the CT to the wellbore, and is operated by a pre-set pump rate from surface. Developed to improve the low coverage in open hole ERW logging jobs, the tractor underwent extensive factory testing before being deployed to the field. The tractor was rigged up on location with the production logging tool and ran in hole. Once the coil tubing locked up, the tractor was activated and pulled the coil to cover over 90% of the open hole section delivering a pulling force of up to 3,200 lb. Real-time production logging was conducted simultaneously with the tractor activated, flowing and shut-in passes were completed to successfully capture the zonal inflow profile. Real-time logging with the tractor is logistically efficient and allows instantaneous decision making to repeat passes for improved data quality. The new slim logging tractor is the world's slimmest most compact, and the first of its kind CT tractor that enables production logging operations in horizontal extended reach open hole wells. The ability to successfully log these extended reach wells cannot be understated, reservoir simulations and management decisions can only as good as the quality of data available. Some of the advantages of drilling extended reach wells such as increased reservoir contact, reduced footprint and less wells drilled will be lost if sufficient reservoir surveillance cannot be achieved. To maximize the benefits of ERWs, creative solutions and innovative designs must continually be developed to push the boundaries further.

scholarly journals STUDY, DESIGN AND SIMULATION OF A PROGRAM FOR NUMERICAL EVALUATION OF VEHICLES’ FUEL CONSUMPTION DUE TO DRAG FORCE; CASE OF LIGHT VEHICLES.

2020 ◽  
Vol 7 (1) ◽  
pp. 1-11
Author(s):  
Mbelle Samuel Bisong ◽  
Paune Felix ◽  
Lokoue D. Romaric Brandon ◽  
Pierre Kisito Talla
Keyword(s):  
Mathematical Model ◽  
Computer Program ◽  
Fuel Consumption ◽  
Drag Force ◽  
Numerical Evaluation ◽  
Construction Companies ◽  
Mathematical Relation ◽  
Basic Equations ◽  
Valid Information

Nowadays, vehicles are being abandoned by their users due to their high fuel consumption which had not been studied by the user from the start. Thus, the need to study the fuel consumption of vehicles due to one of the factors which greatly affects it; drag force, so as to produce information which vehicle users can have before purchasing their vehicles. With regards to this, this work is focused on the development of a computer program able to evaluate the fuel consumption of light vehicles. To achieve this, the basic equations of consumption are used to arrive at a mathematical relation between drag force and fuel consumption. This mathematical model is further implemented on the analytical software Matlab in order to produce the various consumption curves of the vehicles case study. A simulator which takes into consideration a vehicle’s engine data in order to produce specific consumption curves and provide valid information on the fuel consumption of the vehicle is developed from this mathematical model. It can be used in automotive construction companies and also by any individual.

scholarly journals Estimation of ballasting tractors 5-6 traction classes

2021 ◽  
Vol 5 (47) ◽  
pp. 19-19
Author(s):  
Irina Lоntseva ◽  
Vyacheslav Sennikov
Keyword(s):  
Analysis Of Variance ◽  
Agricultural Production ◽  
Combustion Engine ◽  
Modern Agriculture ◽  
Tractive Effort ◽  
Increase Productivity ◽  
Pulling Force ◽  
Energy Saturation ◽  
Number Of Passes ◽  
Engine Power

To increase productivity in agricultural production, combined wide-grip machines are being created, aggregated with tractors of traction classes from 5 and higher. In addition, according to agrotechnical requirements, the pressure of the mover on the soil should be minimal, as well as the number of passes over the surface of the field. These contradictions can be solved by ballasting of tractors, which allows using engine power to increase tractive effort. Ballasting affects energy saturation. Increased energy saturation with appropriate ballasting makes it possible to compose machine-tractor units (MTU) according to a more accurate ratio of the tractor pulling force and the unit's pulling resistance. The most in demand in modern agriculture are tractors of 5-6 traction classes produced by domestic and foreign tractor-building plants with an internal combustion engine with a capacity of 220-320 kW and an operating weight of 115-150 kN. The article contains a two-way analysis of variance, which makes it possible to determine the greatest influence on the ballasting of a tractor. A diagram is constructed that gives an idea of which of the studied brands of tractors can be recommended for performing agricultural operations, taking into account ballasting and compliance with agrotechnical requirements. Keywords: TRACTOR, BALLASTING, ENERGY SATURATION, TWO-FACTOR ANALYSIS OF VARIANCE

scholarly journals Liquid–liquid gravity displacement in a vertical fracture during drilling: Experimental study and mathematical model

2019 ◽  
Vol 38 (2) ◽  
pp. 533-554
Author(s):  
Dong Xiao ◽  
Yingfeng Meng ◽  
Xiangyang Zhao ◽  
Gao Li ◽  
Jiaxin Xu
Keyword(s):  
Mathematical Model ◽  
Drilling Fluid ◽  
Effective Means ◽  
Fluid Density ◽  
Shape Factors ◽  
Fracture Width ◽  
Factors Affecting ◽  
Double Substrate ◽  
Fracture Height ◽  
Liquid Displacement

Gravity displacement often occurs when drilling a vertical fractured formation, causing a downhole complexity with risk of blowout and reservoir damage, well control difficulty, drilling cycle prolongation, and increased costs. Based on an experimental device created for simulating the gravity displacement, various factors affecting the displacement quantity were quantitatively evaluated by simulating the fracture width, asphalt viscosity, drilling fluid density, and viscosity under different working conditions, and a liquid–liquid displacement law was obtained. Using the theories of rock mechanics, fluid mechanics, and seepage mechanics, based on conformal mapping, as well as a fracture-pore double substrate fluid flow model, we established a steady-state mathematical model of fractured formation liquid–liquid gravity displacement by optimizing the shape factors and using a combination of gravity displacement experiments to verify the feasibility of the mathematical model. We analyzed the influence of drilling fluid density, fracture height and length, and asphalt viscosity on displacement rate, and obtained the corresponding laws. The results show that when the oil–fluid interface is stable, the fracture width is the most important factor affecting the gravity displacement, and plugging is the most effective means of managing gravity displacement.

New Model to Analyze Nonlinear Leak-Off Test Behavior

1999 ◽  
Vol 121 (2) ◽  
pp. 102-109 ◽  
Author(s):  
G. Altun ◽  
E. Shirman ◽  
J. P. Langlinais ◽  
A. T. Bourgoyne
Keyword(s):  
Mathematical Model ◽  
Drilling Fluid ◽  
Nonlinear Behavior ◽  
Injection Pressure ◽  
Maximum Pressure ◽  
Drilling Fluids ◽  
Total System ◽  
Verification Method ◽  
Fracture Pressure ◽  
Wellbore Pressure

A leak-off test (LOT) is a verification method to estimate fracture pressure of exposed formations. After cementing each casing string, LOT is run to verify that the casing, cement and formation below the casing seat can withstand the wellbore pressure required to drill for the next casing string safely. Estimated fracture pressure from the test is used as the maximum pressure that may be imposed on that formation. Critical drilling decisions for mud weights, casing setting depths, and well control techniques are based upon the result of a LOT. Although LOT is a simple and inexpensive test, its interpretation is not always easy, particularly in formations that give nonlinear relationships between pumped volume and injection pressure. The observed shape of the LOT is primarily controlled by the local stresses. However, there are other factors that can affect and distort LOT results. Physically the LOT, indeed, reflects the total system compressibility, i.e., the compressibility of the drilling fluid, wellbore expansion, or so-called borehole ballooning, and leak (filtration) of drilling fluids into the formation. There is, however, no mathematical model explaining the nonlinear behavior. Disagreement on determining or interpreting actual leak-off pressure from the test data among the operators is common. In this paper, a mathematical model using a well-known compressibility equation is derived for total system compressibility to fully analyze nonlinear LOT behavior. This model accurately predicts the observed nonlinear behavior in a field example. The model also predicts the fracture pressure of the formation without running a test until formation fracture.

scholarly journals Practical Modeling of Filter Filtration Efficiency

1990 ◽  
Vol 14 (6) ◽  
pp. 314-352
Author(s):  
J Kao
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Pressure Drop ◽  
Drag Force ◽  
Flow Rate ◽  
Filtration Efficiency ◽  
Design Parameters ◽  
Practical Design ◽  
General Mathematical Model

AbstractA simple and general mathematical model has been developed to calculate filter-filtration efficiency, which is based on practical design parameters: pressure drop, filter dimension, flow rate, and filament denier. This model has been verified by examining published experimental data, which include a broad range of design parameters. This model surpasses other models currently described in the literature in terms of accuracy. The drag force of the filter (which is accounted for by the pressure drop times the circumference squared, DP • C2) appears to be the most important contribution to filter-filtration efficiency, but its contribution can be drastically reduced by varying design parameters.

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