
What is the minimum flow rate for a hole?
This minimum flow rate is the critical flow rate (CFR). If an inadequate flow rate is used, cuttings will settle on the low side of the hole. A large stationary bed may form, possibly resulting in severe drilling problems such as high torque and drag, hole packingoff, and stuck pipe.See all results for this questionUltramafic Rock Carbonation: Constraints From Listvenite correlation of microstructural factors with the yield Hole drillingApr 17, 2020 · The magnesitefluid calibration by Aharon (1988; using magnesite 2) yields fractionation between 31 and 9.5 over the same temperature range. For dolomite, the predicted oxygen isotope fractionation varies between 22 and 7.2 for the temperature range 98227 °C based on the most recent temperature relationship by Horita .The Vibratory Stress Relief Librarying, xray and blindholedrilling techniques. The holedrilling method was modified to take into account the effect of local plastic yielding due to stress concentration and the machining stresses, with a resultant accuracy comparable to that obtained by the sectioning method. As a result of the vibratory treatments, residual stress reSome results are removed in response to a notice of local law requirement. For more information, please see here.
Strength of casing and tubing  PetroWiki
If casing is subjected to internal pressure higher than external, it is said that casing is exposed to burst pressure loading. Burst pressure loading conditions occur during well control operations, casing pressure integrity tests, pumping operations, and production operations. The MIYP of the pipe body is determined by the internal yield pressure formula found in API Bull. 5C3, Formulas and Calculations for Casing, Tubing, Drillpipe, and Line Pipe Properties. correlation of microstructural factors with the yield Hole drilling correlation of microstructural factors with the yield Hole drilling correlation of microstructural factors with the yield Hole drilling correlation of microstructural factors with the yield Hole drilling correlation of microstructural factors with the yield Hole drilling correlation of microstructural factors with the yield Hole drilling..(1) where PB= minimum burst pressure, psi, YSee more on petrowiki.spe.orgResidual Stress Measurement Using Hole Drilling and correlation of microstructural factors with the yield Hole drillingOct 08, 2013 · Residual stress analysis using a globalDIC code; experimental data, xx field (Material of specimen is AISI 304, thus Youngs modulus is about 200 GPa, whereas hole diameter and thickness are respectively 4 and 5 mm). Left: xx = 6 MPa, right: y = 60MPa. Note the noise near the hole, clearly visible in the 6 MPa case, but detectable also in the 60 MPa case.Recent Advancements in the HoleDrilling StrainGage correlation of microstructural factors with the yield Hole drillingFeb 25, 2019 · The holedrilling StrainGage method is a widely used and costeffective technique for the evaluation of residual stresses. The test method is standardized by ASTM E83713a, which defines the scope, measurement range, minimum requirements of instrumentation, test procedure, and algorithms and coefficients for the computation of uniform and nonuniform stress distribution.
Quantitative measurement of the hardness profile on carbo correlation of microstructural factors with the yield Hole drilling
Jun 01, 1999 · The thrust measured during a drilling test is related to the hardness of the material being tested. When the test is performed on a superficially heatOverview on vertical and directional drilling technologies correlation of microstructural factors with the yield Hole drillingAug 30, 2016 · The vertical and directional drilling are the key technologies for the exploration and exploitation of oil and gas resources in deep formations. Meanwhile, they are also the very important ways to exploit deep geothermal energy and georesources, conduct international continental scientific drilling program. The aim of the present overview is to review and discuss the vertical and directional correlation of microstructural factors with the yield Hole drillingOptimizing the EDM holedrilling strain gage method for correlation of microstructural factors with the yield Hole drillingAug 01, 2009 · 1.. IntroductionThe holedrilling strain gage method, as defined in the ASTM E837 standard (), provides a highly accurate means of measuring the residual stress within a component.In the measurement procedure, a strain gage rosette is attached to the area of interest and a measurement hole with appropriate depth and diameter is then drilled in the center of the gage circle in order to
MicrostructureDependent Local Strain Behavior in correlation of microstructural factors with the yield Hole drilling
Aug 19, 2009 · Digital image correlation of laserablated platinum nanoparticles on the surface of a polycrystalline metal (nickelbased superalloy René 88DT) was used to obtain the local strain behavior from an insitu scanning electron microscope tensile experiment at room temperature. By fusing this information with crystallographic orientations from electron backscatter diffraction (EBSD), a Microstructural evolution of soft magnetic 49Fe49Co2V correlation of microstructural factors with the yield Hole drillingApr 01, 2020 · The influence of drilling on microstructure of 49Fe49Co2V has been investigated. A thin layer of refined grains occurs in the nearest region to the hole wall. A single BCC solid solution structure of 49Fe49Co2V can be attained by drilling. Dislocation density decreases with the distance to the hole wall increasing. Cited by: 1Publish Year: 2020Author: Yuan Zhang, Renke Kang, Zhigang Dong, Qing Wang, Xianglong Zhu, Rui Xu, Dongming GuoMicrostructural characterization and mechanical properties correlation of microstructural factors with the yield Hole drillingJun 01, 2019 · There are some parameters that influence the cutting forces and surface quality of the drill hole, such as cutting speed, feed rate, tool type and particle fraction. To optimize these drilling, parameters are needed for improving the efficiency of drilling and surface quality of the drilled hole.Cited by: 2Publish Year: 2019Author: V Vignesh Kumar, K Raja, K Chandrasekaran, T RamkumarEstimated Reading Time: 9 mins
Microstructural Analysis of Machined Surface Integrity in correlation of microstructural factors with the yield Hole drilling
Aug 21, 2017 · The analysis of microstructural alterations after drilling shows that lower grain size and higher grain boundary misorientation angle in the drilled subsurface are observed for the drilling conditions, when mechanical deformation is dominant, whereas when thermal deformation is dominant, higher grain size and lower grain boundary misorientation angle in the drilled subsurfaces are observed.Cited by: 7Publish Year: 2017Author: Nilesh Varote, Suhas S. JoshiEstimated Reading Time: 3 minsLaser drilling of structural ceramicsA review  ScienceDirectApr 01, 2017 · They have found that microcracking reduced 1.2 times by the localized plasma heating during laser drilling using optimized drilling parameters of repetition frequency (200 Hz), pulse width (0.6 ms), pulse energy (3.2 J) and drilling time (0.75 s). Therefore, thermal effect has a great influence on ceramic processing.How does the angle factor affect hole cleaning?Figs. 1a, 2a, and 3a show these values for 17 1/2in., 12 1/4in., and 8 1/2in. holes, respectively. The effect of the hole angle was approximated by a group of factors called the angle factor (AF), shown in Table 1. As the hole angle increases, the AF value decreases, and hole cleaning becomes more difficult.See all results for this question
How are hole cleaning requirements determined in deviated wells?
A set of simple charts can help engineers at the rig site quickly determine hole cleaning requirements for drilling deviated or horizontal wells. The charts can also quantify the effect of hole enlargement, which adversely affects hole cleaning. These charts have been derived from a computer model based on both laboratory and field measurements.See all results for this questionHow are Ti and yield points related to hole cleaning?At a given set of drilling conditions (hole size, angle, mud weight, and mud plastic viscosity and yield point), TI is a direct indication of the hole cleaning condition during drilling. The greater the TI, the easier the hole is to clean. Likewise, a small TI indicates more difficult hole cleaning.See all results for this questionFactors Affecting Cuttings Removal During Rotary Drilling correlation of microstructural factors with the yield Hole drillingLaboratory tests conducted by the author, together with actual field experience in Canada, have indicated the magnitude of some of the factors affecting ability for drilling mud to clean the hole. A correlation was observed between funnel viscosity and particle slip velocity. A relationship was also observed between the Bingham yield value of the mud and the particle slip velocity.
Correlations of Mud Rheological Properties With Cuttings correlation of microstructural factors with the yield Hole drilling
Mar 01, 1991 · Correlation coefficients for these were often from 0.9 to 0.95. For hole angles 45° (from vertical), increasing values of these parameters improved cuttings removal (i.e., reduced cuttings volume). The same was observed at angles near horizontal, but only in the laminar flow regime.Correlation of bone mineral density with strength and correlation of microstructural factors with the yield Hole drillingThe aim of this study was to evaluate the influence of microstructural parameters, such as porosity and osteon dimensions, on strength. Therefore, the predictive value of bone mineral density (BMD) measured by quantitative computed tomography (QCT) for intracortical porosity and other microstructural parameters, as well as for strength of cortical bone biopsies, was investigated.Cited by: 233Publish Year: 2002Author: N.J Wachter, G.D Krischak, M Mentzel, M.R Sarkar, T Ebinger, L Kinzl, L Claes, P AugatCorrelation of bone mineral density with strength and correlation of microstructural factors with the yield Hole drillingStructural parameters related to pore dimensions revealed higher correlation coefficients with yield stress (r = 0.69 for average pore diameter and r = 0.62 for fraction of porous structures, p correlation of microstructural factors with the yield Hole drilling
Correlation of bone mineral density with strength and correlation of microstructural factors with the yield Hole drilling
Jul 01, 2002 · Both the average pore diameter and average pore area showed the highest correlation coefficients with yield stress as well as with elastic modulus using a polynomial regression model (r = 0.73, r = 0.68 for yield stress, p < 0.005; r = 0.49, r = 0.51 for elastic modulus, p < 0.05). We consider these strong correlations between parameters describing porosity and porous structures and Correlation of Microstructure and Properties of Cold Gas correlation of microstructural factors with the yield Hole drillingFeb 03, 2020 · The residual stress depth profiles within the coatings and the substrates were evaluated using the incremental hole drilling method (Ref 23,24,25). For the application of the incremental hole drilling technique, a blind hole is incrementally drilled into the material while the strain release on the surface is measured using strain gauges.Cited by: 5Publish Year: 2020Author: R. Vaßen, J. Fiebig, T. Kalfhaus, J. Gibmeier, A. Kostka, S. SchrüferEstimated Reading Time: 10 minsCorrelation between Microstructural Alteration, Mechanical correlation of microstructural factors with the yield Hole drillingCryogenic treatment is a supplemental structural and mechanical properties refinement process to conventional heat treatment processes, quenching, and tempering. Cryogenic treatment encourages the improvement of material properties and durability by means of microstructural alteration comprising phase transfer, particle size, and distribution. These effects are almost permanent and correlation of microstructural factors with the yield Hole drillingCited by: 13Publish Year: 2019Author: Abbas Razavykia, Cristiana Delprete, Paolo BaldisseraEstimated Reading Time: 10 mins