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  • Study of the Hydraulic Performance of Drill Bits Using

    2014-1-30 · Summary. The hydraulic performance of fixed-cutter drill bits was studied with the ANSYS-FLUENT code (ANSYS 2012 ). Cuttings were modeled as spherical particles that were injected from the bottom of the hole, and discrete particle modeling (DPM) was used to track the cuttings in which particle/particle interaction is ignored.

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  • US7302374B2 - Method of designing a drill bit, and

    A method for designing a drill bit that involves simulating a drill bit having cutting elements disposed thereon is provided. In particular, the method involves determining the axial forces acting...

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  • Anti-Balling Drill Bit and Method of Making Same ...

    While FIGS. 4A and 4B show a specific method and arrangement of making the drill bit using the anti-balling composition 417 alone or in combination with the matrix compound 419 and/or infiltrant 421, the drill bit herein may be formed using a variety of combinations of the compositions described herein and at various configurations about the ...

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  • Development models for the drill bit lifetime

    2021-3-1 · The drill bit lifetimes increased with increasing brittleness test, Sievers' J miniature test, and the drilling rate index. The Sievers’ J miniature drill method is used for forecasting cutter life and direct cutter life. 7. Download : Download high-res image (313KB) Download : Download full-size image; Fig. 4.

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  • SPIRAL DRILL BIT AND METHOD OF FORMING SAME

    The method for forming the spiral drill bit includes turning the helical groove segments onto a round stock. An axial clearance and an initial diametral clearance are provided upon turning the helical grooves. A grinding process is used to form a radial clearance and a final diametral clearance. The reduction to the amount of grinding required ...

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  • Retrieving drill bit seismic signals using surface ...

    2015-7-25 · Abstract. Seismic while drilling (SWD) is an emerging borehole seismic imaging technique that uses the downhole drill-bit vibrations as seismic source. Without interrupting drilling, SWD technique can make near-real-time images of the rock formations ahead of the bit and optimize drilling operation, with reduction of costs and the risk of drilling.

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  • Drill Collar Weight Calculation Methods - Drilling

    2017-11-4 · Drill Collars of length L C ; Heavy Weight Drill Pipe (HWDP) of length L H.; The hydraulic force acting on the cross sectional area between the Drill Collar and Heavy Weight Drill Pipe (HWDP) is denoted by F 1.; The hydraulic force acting on the bottom of the Drill Collars is denoted by F 2.; The Weight On Drilling Bit WOB acts on the formation, but since for every action there is a reaction ...

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  • Modeling of wave propagation in drill strings using ...

    2016-8-4 · propagating in a drill system is proposed in this article. The proposed method is based on a vibration transfer matrix approach in which a constant cross-sectional drill pipe sec-tion is modeled by using an “analytical” vibration transfer matrix between two sets of structural wave variables at the two ends of the pipe section.

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  • METHODS OF WELL CONTROL- DRILLER'S METHOD -

    2017-12-18 · INTRODUCTION TO DRILLER’S METHOD. In the Driller’s Method, the Kill is split into two circulations. During the first, the Kick fluid is circulated without changing the mud weight. During the second, once the Kick is out, the mud is weighted up and pumped around the well on …

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  • Abrasivity evaluation for wear prediction of button

    2019-8-9 · The NTNU/SINTEF test method consists of a suite of drillability tests [brittleness value (S 20) test, Sievers’J-value (SJ) test, abrasion value (AV) test and abrasion value steel (AVS) test] and three different drillability indices, namely Drilling Rate Index™ (DRI), Bit …

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  • Study of the Hydraulic Performance of Drill Bits Using

    DOI: 10.2118/169812-PA Corpus ID: 110165299. Study of the Hydraulic Performance of Drill Bits Using a Computational Particle-Tracking Method @article{Moslemi2014StudyOT, title={Study of the Hydraulic Performance of Drill Bits Using a Computational Particle-Tracking Method}, author={A. Moslemi and G. Ahmadi}, journal={Spe Drilling & Completion}, year={2014}, volume={29}, pages={28-35} }

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  • Method of designing a drill bit, and bits made using

    2007-11-26 · Method of designing a drill bit, and bits made using said method . United States Patent 7571083 . Abstract: A method for designing a drill bit that involves simulating a drill bit having cutting elements disposed thereon is provided. In particular, the method involves determining at least one drilling performance parameter while simulating ...

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  • US8210287B1 - Mining core drill bit and method of

    drill bit segments cylindrical Prior art date 2009-01-05 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires 2030-10-09 Application number US12/651,713 Inventor Karl H. Moller Andrew L. Jedick

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  • Simulation and experimental investigation of drilling

    2018-9-1 · Lofti et al. analyzed the temperature phenomenon in the drill bit using DEFORM 3D. They predicted heat, built up the edge and wear using finite element method which is difficult to calculate during the experiment. They concluded that these parameters depend on the machining parameters. Calculation of tool wear is time and cost consuming process.

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  • SPIRAL DRILL BIT AND METHOD OF FORMING SAME

    The method for forming the spiral drill bit includes turning the helical groove segments onto a round stock. An axial clearance and an initial diametral clearance are provided upon turning the helical grooves. A grinding process is used to form a radial clearance and a final diametral clearance. The reduction to the amount of grinding required ...

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  • Rotary Drilling Method - Hardrockdrills.com

    Drill out bi-center bit and method for using same US6926099B2 (en) 2003-03-26: 2005-08-09: Varel International, L.P. Drill out bi-center bit and method for using same DE10334150A1 (en) * 2003-07-26: 2005-02-17: Fischerwerke Artur Fischer Gmbh & Co. Kg

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  • US4635738A - Drill bit - Google Patents

    Analysis of Drill Bit Vibrations ... The equations of motion are discretized using the finite ele­ ment method. A simple beam element is used as described in Cook (1981), and summarized in the ...

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  • Modeling and Finite Element Analysis of Drill Bit Vibrations

    2006-9-12 · Drill bit, system, and method for drilling a borehole in an earth formation: WO2004104362A1: 2003-05-26: 2004-12-02: Shell Internationale Research Maatschappij B.V. Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole: WO2004111381A1: 2003-06-12: 2004-12-23: Shell Internationale Research ...

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  • Study of the Hydraulic Performance of Drill Bits Using

    DOI: 10.2118/169812-PA Corpus ID: 110165299. Study of the Hydraulic Performance of Drill Bits Using a Computational Particle-Tracking Method @article{Moslemi2014StudyOT, title={Study of the Hydraulic Performance of Drill Bits Using a Computational Particle-Tracking Method}, author={A. Moslemi and G. Ahmadi}, journal={Spe Drilling & Completion}, year={2014}, volume={29}, pages={28-35} }

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  • Chapter 6 DRILLING AND WELL CONSTRUCTION

    This method's main disadvantage is that it is slow. Drilling is accomplished with a tight drill line, as shown in Figure 6.1. The pitman arm and spudder beam impart an up-and-down motion to the cable and drill bit. The length of cable is adjusted so that on the down stroke the tools stretch the line as the bit hits the bottom of the hole ...

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  • How to Use a Drill Safely: 12 Steps (with Pictures) -

    A method of manufacturing the cone drill bit includes assembling a roller cone onto the bearing journal on the at least one asking around the shirttail portion, and performing a spray cycle. The spray cycle includes ng the shirttail portion with hardfacing using a high pressure/high velocity oxygen fuel after the roller cone is assembled onto ...

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  • Method for hardfacing roller cone drill bit legs - Smith ...

    This safe work method statement for drilling is free to use and customisable for your own operations. Safe work method statements are a staple document for all high risk construction activities, outlining the safety requirements and control measures associated with performing that specific activity.

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  • Drilling Safe Work Method Statement (Free, editable

    2020-7-28 · 3 How to Drill into Metals Using a Cordless Drill – A Step by Step Guide. 3.1 Step 1 – Safety First! 3.2 Step 2 – Make a Sacrificial Sandwich. 3.3 Step 3 – Make a Pilot Hole. 3.4 Step 4 – Lubricate. 3.5 Step 5 – Go Slowly. 3.6 Step 6 – Stop if You Notice Smoke. 3.7 …

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  • Down-the-Hole Drilling Method Explained

    2021-7-20 · In the rotary method, the hole is drilled by a rotating bit to which a downward force is applied. The bit is fastened to, and rotated by, a drill string, composed of high quality drill pipe and drill collars, with new sections or joints being added as drilling progresses. The cuttings are lifted from the hole by the drilling fluid which is ...

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  • How to Sharpen a Drill Bit by Hand: 8 Steps (with

    2016-6-8 · Drill Size Dec. Eq. Drill Size Dec. Eq. Drill Size Dec. Eq. Drill Size Dec. Eq. 0 0.060 80 0.045 3/64 0.047 55 0.052 52 0.064 50 0.070 64 0.054 53 0.060 1/16 0.063 72 0.056 53 0.060 52 0.064 56 0.064 50 0.070 49 0.073 64 0.067 50 0.070 48 0.076 48 0.073 47 0.079 44 0.086 56 0.077 45 0.082 43 0.089 40 0.081 43 0.089 41 0.096 48 0.086 42 0.094 40 ...

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  • DRILL BIT SELECTION USING DESIGN OF

    Then by using the Design of Experiment, selection of the best drill bit could be done. In this study, 2 factors that influenced the result are the drill bit type and the drill point angle. Significance test using nested design through MINITAB 14 application has shown that both factors have significant influence over the hole diameter size..

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  • A New Method of Bit Selection using Drill Bit Images ...

    2020-10-27 · The last method was using PSO to train the ANN for a better ROP prediction. Better R 2 and MSE combinations were evident giving values of 0.9434 and 0.03918 respectively where the input data consisted of both drilling parameters and bit image features.

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  • [PDF] Optimization of Flow Path of Drill Bit Using CFD ...

    In this study, a series of CFD (Computational Fluid Dynamics) simulations carried out to evaluate the optimum design model of the internal flow path of drill bit. The Star-CCM+ code was adopted to simulate the multi-phase discharge flow of rock particles and flushing air during a drilling process. The input parameters for the flow simulation of rock particles and air were obtained from the in ...

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  • Chapter 6 DRILLING AND WELL CONSTRUCTION

    This method's main disadvantage is that it is slow. Drilling is accomplished with a tight drill line, as shown in Figure 6.1. The pitman arm and spudder beam impart an up-and-down motion to the cable and drill bit. The length of cable is adjusted so that on the down stroke the tools stretch the line as the bit hits the bottom of the hole ...

    Get Price
  • Drill Collar Weight Calculation Methods - Drilling

    2017-11-4 · Drill Collars of length L C ; Heavy Weight Drill Pipe (HWDP) of length L H.; The hydraulic force acting on the cross sectional area between the Drill Collar and Heavy Weight Drill Pipe (HWDP) is denoted by F 1.; The hydraulic force acting on the bottom of the Drill Collars is denoted by F 2.; The Weight On Drilling Bit WOB acts on the formation, but since for every action there is a reaction ...

    Get Price
  • Method for hardfacing roller cone drill bit legs - Smith ...

    A method of manufacturing the cone drill bit includes assembling a roller cone onto the bearing journal on the at least one asking around the shirttail portion, and performing a spray cycle. The spray cycle includes ng the shirttail portion with hardfacing using a high pressure/high velocity oxygen fuel after the roller cone is assembled onto ...

    Get Price
  • Tool reliability of sintered diamond drill bit for ...

    2020-5-11 · The quality change of each drill bit was measured by FA2204 ultra-precision electronic balance with the resolution of 0.1 mg before and after drilling for 15 min under each set of parameters. To ensure the accuracy of weighing, the drill bit was cleaned with 75% alcohol and dried before measured. 5. Cutting force measurement

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  • 43 - Simple drilling methods - Loughborough University

    2015-1-5 · Method: A drill-pipe and bit are rotated to cut the rock. Air, water, or drilling mud is pumped down the drill-pipe to flush out the debris. The velocity of the flush in the borehole annulus must be sufficient to lift the cuttings. Further reading Allen, D.V., Low-Cost Hand Drilling, Consallen Group Sales Ltd., Loughton, 1993.

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  • Evaluation of Drill Bit Performance Taking Into

    1997-8-30 · Even though drill bit costs vary between 0.7% to 3% of the total drilling costs, their behavior influences directly the rig time which, in its turn, may reach up to 30% of the total cost. The very high drilling costs of deep offshore, HTHP wells, and wells drilled in remote areas, i.e., m the Amazon area are of great concern in Brazil.

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  • Tool reliability of sintered diamond drill bit for ...

    2020-5-11 · The quality change of each drill bit was measured by FA2204 ultra-precision electronic balance with the resolution of 0.1 mg before and after drilling for 15 min under each set of parameters. To ensure the accuracy of weighing, the drill bit was cleaned with 75% alcohol and dried before measured. 5. Cutting force measurement

    Get Price
  • Rotary Drilling General Method and Equipment -

    2021-7-20 · In the rotary method, the hole is drilled by a rotating bit to which a downward force is applied. The bit is fastened to, and rotated by, a drill string, composed of high quality drill pipe and drill collars, with new sections or joints being added as drilling progresses. The cuttings are lifted from the hole by the drilling fluid which is ...

    Get Price
  • Horizontal Drains and Horizontal Drilling: An Overview

    l 1 ll .11 ,/J because the drill holes in the softer, more-friable materials eroded severely under the action of the return drill water, which produced deep channels beneath the drill stem. As pressure was applied to the drill bit, the string of drill stem would flex into the eroded channels and break.

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  • How To Drill A Straight Hole (Easy Tips and

    2020-7-28 · 3 How to Drill into Metals Using a Cordless Drill – A Step by Step Guide. 3.1 Step 1 – Safety First! 3.2 Step 2 – Make a Sacrificial Sandwich. 3.3 Step 3 – Make a Pilot Hole. 3.4 Step 4 – Lubricate. 3.5 Step 5 – Go Slowly. 3.6 Step 6 – Stop if You Notice Smoke. 3.7 …

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  • How To Drill Into Metals: The Right Way To Go About It

    2019-12-31 · Whether you opt to use a Dremel or a Drill, it is imperative to use quality bits. Below are links to HSS Steel & Titanium Bits for use in completing the pins with 1st Time Quality Results. Dremel 628 Precision (Standard) https://amzn.to/358r19X Dremel 631 Brad Point (Standard) https://amzn.to/2FboYr7 I DO NOT RECOMMEND using the Dremel 636 Brad Point (Metric) - Use the …

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  • How to Drill Steel: 15 Steps (with Pictures) - wikiHow

    Collaring Brazed Joint T-DRILL Collaring Method. Tee Forming – The T-DRILL method was developed in the 1970’s. The idea that pipes and tubes could be branched much more quickly and cost-effectively into end products of greater strength and higher quality was as revolutionary as it was simple, and one of the major inventions in the field.

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