Analysis of API S-135 steel drill pipe cutting process by blowout preventer

2020 ◽  
Vol 195 ◽  
pp. 107819
Author(s):  
Nikolas Lukin ◽  
Rafael Traldi Moura ◽  
Marcilio Alves ◽  
Michael Brünig ◽  
Larissa Driemeier
Keyword(s):  
Drill Pipe ◽  
Cutting Process ◽  
Blowout Preventer ◽  
Steel Drill

scholarly journals Study on mechanical properties of titanium alloy drill pipe and application technology

2021 ◽  
Vol 261 ◽  
pp. 02021
Author(s):  
Xiaoyong Yang ◽  
Shichun Chen ◽  
Qiang Feng ◽  
Wenhua Zhang ◽  
Yue Wang
Keyword(s):  
Titanium Alloy ◽  
Oil And Gas ◽  
Drill Pipe ◽  
Petroleum Industry ◽  
Drill String ◽  
Curvature Radius ◽  
Outer Diameter ◽  
Gas Field ◽  
Steel Drill ◽  
Buildup Rate

With the increasing intensity of oil and gas field exploration and development, oil and gas wells are also drilling into deeper and more complex formations. Conventional steel drilling tools can no longer meet the requirements of ultra-deep, high-temperature and high-pressure wells. The paper first analyzes the advantages of titanium alloy drill pipe based on basic performance of titanium alloy drill pipe. The experimental results show that the basic properties of titanium alloy drill pipes meet the operating standards of the petroleum industry. Then the buckling performance of titanium alloy drill pipe and steel drill pipe is compared, the calculation results show that the buckling performance of titanium alloy drill tools is slightly lower than that of steel drill tools. Secondly, the maximum allowable buildup rate of titanium alloy drill pipe and steel drill tool is studied. The research shows that under the same condition of the drill pipe outer diameter, titanium alloy drill pipe can be used for a smaller curvature radius and greater buildup rate. This advantage of titanium alloy drill pipe makes it more suitable for short radius and ultra-short radius wells. Finally, taking a shale gas horizontal well as an example, with the goal of reducing drill string friction and ensuring drill string stability, a comparative study on the application of titanium alloy drill pipe and steel drill pipe is carried out. The results show that titanium alloy drill pipe has a wider application in the field, and is suitable for operations under various complex working conditions.

Changes of Microstructure and Properties of G105 Drill Pipe in H2S Environment

2015 ◽  
Vol 814 ◽  
pp. 303-312
Author(s):  
Ben Sheng Huang ◽  
Xiang Chen ◽  
Long Peng Huang
Keyword(s):  
Oil And Gas ◽  
Drill Pipe ◽  
Hardness Test ◽  
Immersion Test ◽  
Metallographic Analysis ◽  
Key Factors ◽  
High Concentration ◽  
Microstructure And Properties ◽  
Steel Drill ◽  
Pipe Materials

H2S corrosion has become one of the key factors that has impact seriously on the exploration and development of high-sulfur oil and gas. In order to study the change of microstructure and properties of G105 steel drill pipe in H2S environment, different concentrations of H2S (300ppm, 400ppm, 500ppm, 600ppm) were used respectively at room temperature to make corrosion immersion test on the G105 drill pipe, and then tensile test, impact test, hardness test, metallographic analysis, scanning electron microscopy (SEM) observation and EDS spectrum analysis. The results showed that in the range of H2S concentration provided in tests, pipe materials was corroded quite seriously, microstructure changed obviously, comprehensive mechanical properties decreased significantly, and the range decreased first and then increased and decreased again. The type of fracture is classified as the pore ductile fracture, some of them appear prospective cleavage characteristics, and, fracture place exist severe solute partial clustering phenomenon. In addition, high concentration of Sulfur was found in impact fracture surface. The results would provide a reference for our understanding of the corrosion behavior of the drill pipe materials in H2S environment and the development of new anti-corrosion materials drill pipe.

Hydraulic Analytical Model of the BOP Control System to Estimate Related Response Times

2018 ◽  
Author(s):  
José Luis Párraga Quispe ◽  
Segen F. Estefen ◽  
Nilo de Moura Jorge ◽  
Marcelo Igor Lourenço Souza
Keyword(s):  
Control System ◽  
Response Time ◽  
Response Times ◽  
Drill Pipe ◽  
Equilibrium Pressure ◽  
Campos Basin ◽  
System Equilibrium ◽  
Proposed Model ◽  
Blowout Preventer ◽  
Surface Test

During activities of ultra-deepwater exploration using drilling vessels an emergency disconnection between Lower Marine Riser Package (LMRP) and Blowout Preventer (BOP) stack could occur due to extreme environmental conditions. The disconnection is not instantaneous; it takes time due to the discharge of pressurized liquid from the system of hydraulic accumulators and the entire process is known as emergency disconnect sequence — EDS. Therefore, estimate the response time of the BOP control system is important to avoid damages that compromise the drillship safe operation. In this study, the BOP control system uses a hydraulic system constituted of accumulator bottles, a pressure regulator, rams, valves, and connectors. This system is considered to estimate the response time of cutting and sealing the BOP. The response time is estimated by applying the theory of fluid mechanics and Bernoulli equation to calculate the system equilibrium pressure. The accumulators are sized according to API 16 D and considered to have adiabatic behavior. Nitrogen is simulated as real gas. The validation of the proposed model is performed by comparison with a surface test for cutting of drill pipe with blind shear ram. The model is applied to a case study for ultra-deepwater in Campos Basin Brazil.

Successful Use of Mixed Aluminum-Steel Drill Pipe String In Complex Horizontal Wells: Case Study

2014 ◽  
Author(s):  
Stephane Menand ◽  
Jeffry Lehner ◽  
Nigel Evans ◽  
Aaron Palmer ◽  
Metcalfe Arthur
Keyword(s):  
Drill Pipe ◽  
Horizontal Wells ◽  
Steel Drill

Analysis of Some Factors Related to Permissible Horizontal Motions of a Floating Drilling Vessel

1970 ◽  
Vol 10 (03) ◽  
pp. 229-236 ◽  
Author(s):  
John E. Hansford ◽  
Arthur Lubinski
Keyword(s):  
Fatigue Damage ◽  
Water Depth ◽  
Drill Pipe ◽  
Drill String ◽  
Blowout Preventer ◽  
Bending Stresses ◽  
Cumulative Fatigue Damage ◽  
Vessel Motion ◽  
Pipe Bending ◽  
Rotary Drive

Abstract Horizontal vessel motions (drift, sway or surge) result in the bending of the drill-string members in the vicinity of the rotary-drive bushing at the vessel and at the blowout preventer close to the sea floor. Allowable horizontal vessel motions are calculated as a function of hookload, using both cumulative fatigue damage and drill-pipe strength as criteria for drilling and for pulling stuck pipe. The presently used rule limiting horizontal vessel motion to 5 percent of water depth is shown to be too restrictive in some cases and too lenient in others. Introduction When drilling from a floating vessel, the rotating drill string is subjected to fatigue damage caused by reversing stresses which arise from heave, roll, pitch and horizontal motions of the vessel. In Ref. pitch and horizontal motions of the vessel. In Ref. 1, the effect of drilling-vessel roll and pitch on the cumulative fatigue damage of the kelly and the first joint of drill pipe below the kelly are examined. As a continuation of that investigation, the present study covers the effect of horizontal motions of the vessel on the drill string. Horizontal departure from over the borehole may be oscillatory (sway or surge), static (drift), or most often, some combination of the two. An accepted limit of horizontal vessel motion of 5 percent of the water depth has been suggested mad percent of the water depth has been suggested mad frequently followed. In reality, the allowable motion is strongly influenced by the hookload. Motions greater than 5 percent of water depth are often permissible, and under some conditions, motions permissible, and under some conditions, motions should be limited to less than 5 percent of water depth. The purpose of this paper is to suggest maximum permissible motions imposed by drill-pipe fatigue damage and pipe strength, as a function of hookload. IDEALIZED SYSTEMS Fig. 1 shows an idealized system, highly exaggerated for explicitness. Although pipe bends are shown quite acute, bending stresses were properly defined mathematically. The pipe bending properly defined mathematically. The pipe bending at the rotary-drive bushing (labeled RDB in Fig. 1) is relieved in most cases by a gimbaled bushing and largely taken by the kelly, a more durable member. Therefore, the point of most severe damage is in the area of the blowout preventer rams (labeled BOP). SPEJ P. 229

Aluminum Drill Pipe Fatigue Analysis

2004 ◽  
Author(s):  
Guilherme Farias Miscow ◽  
Joa˜o Carlos Ribeiro Pla´cido ◽  
Paulo Emi´lio Valada˜o de Miranda ◽  
Theodoro Antoun Netto
Keyword(s):  
Fatigue Life ◽  
Structural Integrity ◽  
Crack Nucleation ◽  
Drill Pipe ◽  
Drill String ◽  
Small Scale ◽  
Second Phase ◽  
Horizontal Section ◽  
Steel Drill ◽  
Drill Pipes

While drilling extended reach wells, the weight per foot of the drill string is a critical design parameter that can limit the depth to be reached. One practical solution is the use of drill pipes made of alternative materials to the conventional steel drill pipes. The most direct options are titanium and aluminum. Titanium is in general impaired due to its high cost, although the titanium alloy Ti-6Al4V has already been used in the airplane industry. More recently, Russia has been manufacturing drill pipes using aluminum alloys of the system Al-Cu-Mg, similar to alloys 2024, also used in airplanes. These pipes present a reasonable commercial cost. Drill pipe fatigue damage occurs under cyclic loading conditions due to, for instance, rotation in curved sections of the well. Failures caused by crack nucleation and propagation are one of the highest risks to the structural integrity of these pipes. Usually, failure mechanisms develop in the transition region of the tool joint. Several mechanical and metallurgical factors affect the fatigue life of drill pipes. The former are mainly geometric discontinuities such as transition zones, pits and slip marks. The latter are related to the size and distribution of crystalline grains, phases and second phase particles (inclusions). In this study, the roles played by both factors in the fatigue life of drill pipes are studied through an experimental test program. The fundamental fatigue mechanisms are investigated via laboratory tests in small-scale coupons performed in an opto-mechanical fatigue apparatus. Additionally, full-scale fatigue testes on three aluminum drill pipes were performed. The pipes tested are being used in the horizontal section of some extended reach wells in the Northeast of Brazil.

Finite Element Modeling of the Cutting Process of Drillpipes using a Blowout Preventer

2015 ◽  
Author(s):  
Fábio Vinicius Castilho ◽  
Paulo Pedro Kenedi ◽  
Pedro Manuel Calas Lopes Pacheco
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Cutting Process ◽  
Element Modeling ◽  
Blowout Preventer

Multidisciplinary Optimization-Enabled Design Automation and Optimization for Blowout Preventer Pipe Rams

2020 ◽  
Author(s):  
Fei Song ◽  
Ke Li ◽  
Caroline Stephan Rivas ◽  
Konstantin Bieneman ◽  
Thomas Yap
Keyword(s):  
Cost Analysis ◽  
Design Optimization ◽  
Computer Aided Design ◽  
Design Space Exploration ◽  
Drill Pipe ◽  
Automated Design ◽  
Multidisciplinary Optimization ◽  
Manufacturing Cost ◽  
Computer Aided ◽  
Blowout Preventer

Abstract A blowout preventer (BOP) is a large valve that encases an oil well on the surface. The valve may be closed while drilling if overpressure from a reservoir causes formation fluids such as oil and natural gas to back up within the wellbore and endanger the rig. A pipe ram is one of the critical components in the BOP system, which is designed to seal around a drill pipe, restricting the flow in the annulus between the outside of the drill pipe and the wellbore. The pipe ram design family, which contains hundreds of pipe ram designs, intends to cover different configurations to suit a variety of dill pipe sizes. To assure their structural integrity under service loads, these pipe rams need to be designed to meet the stress requirements per the American Petroleum Institute (API) Specification 16A and ASME (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code Section VIII, Division 2. With a conventional manual design workflow, it would take a significant amount of time and effort to complete all the designs for the product family with code compliance. Therefore, a scalable solution is highly desirable for delivery of customer-needed ram blocks with much shorter lead time. MDO (Multi-Disciplinary Optimization) involves multi-code integration, CAE (Computer-Aided Engineering) workflow automation, design space exploration, and optimization. MDO-enabled, automated design optimization is becoming increasingly popular in both scientific and engineering communities. In this paper, a methodology for integration of CAD (Computer Aided Design), FEA (Finite Element Analysis), cost, and optimization packages to enable FEA automation and design optimization is presented. A BOP pipe ram is adopted as the use case. The ram block geometry was parameterized before being imported into an FEA package. The FEA workflow was automated such that once a set of geometric parameters are given, the preprocessing, solving, and postprocessing steps can be automatically completed. As part of the FEA postprocessing, stress linearization analysis per the API and ASME BPVC codes has also been automated, which had never been done in the past. A manufacturing cost analysis package can also be used to consume the parameterized geometry for automatic manufacturability assessment and cost predictions. The stress analysis and cost analysis workflows are conducted separately but also orchestrated by an MDO package. Reports that contain the analysis results are sequentially generated for various design permutations. The MDO-enabled automated design and cost analysis approach could substantially enhance efficiency and consistency in performing FEA and cost studies and producing analysis reports. It is also the backbone for automated design optimization, which could significantly improve the product performance and reliability and, meanwhile, minimize the development and product cost.

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