scholarly journals Experimental Study on the Dynamic Rock-Breaking Performance of Pulsed Abrasive Jet Drilling Method

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Yukun Du ◽  
Xiaohong Chen ◽  
Bo Zhao ◽  
Zhiyuan Huang ◽  
Meilian Wu ◽  
...  
Keyword(s):  
Energy Demand ◽  
Oil And Gas ◽  
High Efficiency ◽  
High Strength ◽  
Rock Breaking ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Drilling Tool ◽  
Tight Sand Gas ◽  
Better Than

The efficient development of deep oil and gas reservoirs with abundant resources is conducive to meet the growing energy demand. However, it is very difficult to drill in the deep reservoirs such as tight sand gas and shale gas because of their high strength, low porosity, and low permeability. In this study, it is pointed out that developing high-efficiency drilling methods based on new combined water jets is a good approach to promote the rate of penetration (ROP) in such tight deep reservoirs. A pulsed abrasive water jet drilling tool is designed, and its dynamic work principle is analyzed. The hydraulic structure is optimized; meanwhile, the rock-breaking experiments of this structure are carried out. The results show that the rock-breaking performance of the pulsed water jet is much better than that of the continuous water jet. It is also found that the rock-breaking performance of the pulsed abrasive water jet is much better than that of the premixed abrasive water jet. In addition, the best rock-breaking standoff distance, abrasive concentration, and particle size are detected.

Machining Mechanism of Abrasive Water Jet on Ceramics

2010 ◽  
Vol 426-427 ◽  
pp. 212-215 ◽  
Author(s):  
Feng Lian Zhang
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Brittle Materials ◽  
High Hardness ◽  
Ceramic Materials ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Engineering Ceramics ◽  
Abrasive Water Jet Machining ◽  
Complex Process

Engineering ceramics feature resistance to high temperature, corrosion, wear and hot impact. However, it is difficult to machine this material in conventional machining methods because of its high hardness and brittleness as well as inconductivity, thus restricting its application area. In recent years, more and more importance has been attached to the new machining method of engineering ceramics, i.e. abrasive water-jet. Feature high efficiency and low cost, the method can be used to process the products of complex shape. However, abrasive water-jet machining of advanced ceramics is a very complex process. The effect of machining on brittle materials, and advanced ceramic materials in particular, have not yet been very well understood. The present research investigates the effect of abrasive water-jet machining on ceramics. The study will increase the general understanding of the machining phenomena for more successful application of abrasive water-jet machining on brittle materials.

Experimental Investigation of Hard Rock Breaking Using a Conical Pick Assisted by Abrasive Water Jet

2020 ◽  
Vol 53 (9) ◽  
pp. 4221-4230 ◽  
Author(s):  
Songyong Liu ◽  
Fangyue Zhou ◽  
Hongsheng Li ◽  
Yueqiang Chen ◽  
Fengchao Wang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Hard Rock ◽  
Rock Breaking ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Conical Pick

Advanced Pipeline Welding Technologies for Strain-Based Design

2016 ◽  
Author(s):  
Andrew J. Wasson ◽  
Doug P. Fairchild ◽  
Fredrick F. Noecker ◽  
Mario L. Macia ◽  
Nathan E. Nissley
Keyword(s):  
Weld Metal ◽  
Energy Demand ◽  
Oil And Gas ◽  
Cost Savings ◽  
High Strength ◽  
Weld Strength ◽  
Pipeline Construction ◽  
Welding Technology ◽  
Discontinuous Permafrost ◽  
Longitudinal Strains

In order to meet the increasing worldwide energy demand, there is a need to economically develop remote oil and gas resources. Construction of pipelines is required to connect these resource locations to markets. Such pipeline routes may cross areas of large ground motions such as regions of active seismicity, discontinuous permafrost, and offshore ice gouging. All of these features can subject pipelines to significant longitudinal strains. For these conditions a strain-based design (SBD) approach may be required to maintain pipeline integrity. Welding technology is a key component of pipeline construction. Significant pipeline construction cost savings are enabled with the use of higher strength steels (X80+). Higher strengths enable reduced pipe wall thicknesses, which reduces both weight and girth welding time. However, robust welding technology for high strength SBD pipelines remains challenging. Such applications demand welds with both high strength (>120ksi) and low temperature (−15°C) toughness, combinations that are at the limits of, or beyond, existing commercial technology. This paper discusses the development of an enabling welding technology which offers a superior combination of strength and toughness properties. An iron-nickel (FeNi) martensitic weld metal with a refined mixed cellular microstructure has been developed as a promising high strength weld metal that can be applied for field pipeline construction. This paper describes how this technology has been applied to create welds for X80 strain-based pipelines requiring significant weld strength overmatch and superior ductile tearing resistance. The welding technology can also be applied to X70 grade strain-based pipelines where high toughness is required. This approach has been developed for mainline girth, tie-in girth, and girth repair welding scenarios. Welding procedures are discussed and examples of the mechanical properties achieved and calculated strain capacities are described.

High Efficiency Abrasive Waterjet Dressing of Diamond Grinding Wheel

2014 ◽  
Vol 1017 ◽  
pp. 243-248 ◽  
Author(s):  
Peng Yao ◽  
Wei Wang ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Hong Tao Zhu ◽  
...  
Keyword(s):  
Feed Rate ◽  
High Efficiency ◽  
Water Jet ◽  
Surface Generation ◽  
Abrasive Waterjet ◽  
Grinding Wheel ◽  
Abrasive Water Jet ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Wheel Topography

A grinding wheel wears rapidly during ultrasonic assisted surface generation of a large aperture aspherical RB-SiC mirror, which leads to an increase of grinding force and profile error. In this paper, different types of resinoid bonded diamond grinding wheel with a same grit size were dressed with high-pressure abrasive water jet. The dressing effects of abrasive water jet were assessed through comparing the 3D roughness of the grinding wheel topographies before and after dressing. The experimental results show that diamond grits of a worn grinding wheel are protruding from bond after dressing. The feed rate of nozzle and the bond materials have significant impact on the 3D surface roughness of the wheel and dressing efficient. The softer binder and the decrease of the feed rates and lead to deeper grooves during dressing of grinding wheel. However, too low feed rate will make a large number of abrasive particles drop from binder, which worsens the wheel topography. Therefore, to dress grinding wheel well and efficiently, optimized feed rate must be chosen.

scholarly journals Machinability Optimization of Abrasive Water Jet Cutting Process on AA6082 Aluminium Alloy

2019 ◽  
Vol 8 (10) ◽  
pp. 2134-2140
Keyword(s):  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
High Strength ◽  
Water Jet ◽  
Manufacturing Industries ◽  
Cutting Process ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Rsm Technique

Aluminium alloys are extensively used nowadays in various manufacturing industries due to its special properties and high strength. In this study, AA6082 aluminium alloy is taken into consideration by studying the machinability properties using the abrasive water jet cutting process. RSM technique is used for conducting the experiments by varying the input factors such as stand-off distance, abrasive feed and nozzle transverse speed. The effect of hardness and surface roughness is investigated. The correlation between the input parameters and the corresponding output was tested by analysis of variance to check the 95% confidence level.

scholarly journals Rock Breaking by Conical Pick Assisted with High Pressure Water Jet

2014 ◽  
Vol 6 ◽  
pp. 868041 ◽  
Author(s):  
Liu Songyong ◽  
Chen Junfeng ◽  
Liu Xiaohui
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Hard Rock ◽  
Rock Breaking ◽  
Water Jet ◽  
Cutting Efficiency ◽  
Conical Pick ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Better Than

In the process of hard rock breaking, the conical pick bears great cutting force and wear, and the cutting efficiency is lower. Thus different combination ways of water jet and conical pick were proposed to solve this issue; for instance, water jet placed in the front of pick (JFP) and water jet through the center of pick (JCP) was researched by numerical simulation and experiments in this paper. First, the models of rock breaking were built based on SPH combined with finite element method. Then, the stress distribution of rock and the cut force of pick were analyzed when the rock broken by the conical pick assisted with the high pressure water jet. It indicates that the effect of the JCP on rock breaking is better than the JFP. At last, experiments about rock breaking with a conical pick and the JCP were conducted to verify the reliability of the simulation. It indicates that the rock breaking with the assistance of high pressure water jet cannot only reduce the pick force, but also increase the rock crushing volume.

scholarly journals High-efficiency casing perforation oil and gas wells

2021 ◽  
pp. 112-120
Author(s):  
V. G. Pogrebnyak ◽  
◽  
I. I. Chudyk ◽  
A. V. Pogrebnyak ◽  
I. V. Perkun ◽  
...  
Keyword(s):  
High Speed ◽  
Oil And Gas ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Metal Plate ◽  
Water Jet ◽  
Molecular Weights ◽  
Destructive Action ◽  
Cement Sheath ◽  
Well Cement

The energetic capabilities of a high-speed jet of an aqueous solution of polyethylene oxide (PEO) with varying concentration and different outflow pressures from a jetforming nozzle were investigated using the length of the forming channel in the model of the casing of an oil and gas well, cement sheath and rock layer, as well as impact of the jet force on a metal plate fixed on a physical pendulum. The experimental data made it possible to obtain a calculated dependence in a dimensionless form to determine the quality (initial sections) of jets of aqueous solutions with different concentrations and molecular weights of PEO, considering the real parameters of the jet-forming nozzles of the hydroperforator. A comprehensive study of the perforation process made it possible to substantiate the mechanism of the high destructive capacity of a high-speed jet of polymer solution. It has been established that the mechanism of the high destructive capacity of the polymer water jet is not due to the Toms effect, but caused by the destructive action of the dynamic pressure of the polymer water jet «reinforced» by strongly unfolded macromolecular chains under the action of a tensile flow in the inlet area of the jet forming nozzle of the hydroperforator. Keywords: perforator; jet nozzle; jet quality; casing; cement sheath; rock; Toms effect.

Parametric investigation on surface roughness and hole quality of Ti metal hybrid fibers cored laminate (MFL) during abrasive water jet drilling

2021 ◽  
pp. 095440622110469
Author(s):  
Munusamy Rajesh ◽  
Rajkumar Kaliyamoorthy ◽  
Ramraji Kirubakaran
Keyword(s):  
Surface Roughness ◽  
Water Pressure ◽  
High Strength ◽  
Traverse Speed ◽  
Water Jet ◽  
Drilling Process ◽  
Abrasive Water Jet ◽  
Hybrid Fibers ◽  
Sem Images ◽  
Delamination Factor

High-strength environment-friendly metal-fiber laminates (MFLs) are increasingly used for primary structures for various engineering applications. The surface roughness variation and delamination factor of a titanium (Ti) metal-cored basalt/flax fiber laminate were investigated during abrasive water jet drilling (AWJD). The present AWJD investigation is to establish the correlation of four important process independent variables of WJP—water jet pressure, TS—traverse speed, QMFR—abrasive mass flow rate, and SOD—stand-off distance to the delamination factor (Fd-top) and surface roughness (Ra) of drilled hole. Central composite design (CCD) of L29 orthogonal array was used to perform the experimental observations. The statistical approach (ANOVA) was employed to determine the contribution of individual AWJD parameters to drilling operation. It is identified from experimental results that the water jet pressure is the most predominant process parameter and its contribution on Fd-top and Ra were 74.28% and 72.48%, respectively. Increasing the water pressure from low (160 MPa) to its higher range (320 MPa) showed that the surface roughness and delamination factor were reduced irrespective of other drilling parameters. Increased water pressure provides enough kinetic energy for abrasive particles to facilitate a higher penetration potential during the drilling process. Scanning Electron Microscope (SEM) images show the machining-induced damages like ploughing marks, uncut fibers, ridges, craters, matrix smearing, and delamination on an abrasive water jet drilled surface of prepared MFL.

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