... & disposal equation calculation efficiency differential rop drilling conference baseline mse use dysfunction wob rpm energy axial united states government paper mse equation mse torque spe drilling energy rot exhibition strength The concept of using the calculated energy consumed...

...-bits on a special sample. The results show that the chord-edge cutter mini-bit has higher efficiency than a conventional mini-bit. The second part of the laboratory experiment investigated the influence of rate of penetration (ROP), revolutions per minute (RPM), and rock types on the drilling...

... these and other ML techniques to predict the rate of penetration (ROP), differential pipe sticking (DPS), drillstring vibration, or other drilling events. Prediction of rheological properties of drilling fluids and estimation of the formation properties was performed in 22% of the publications reviewed. Some...

...Ahmed Z. Mazen; Nejat Rahmanian; Iqbal Mujtaba; Ali Hassanpour Summary Predicting rate of penetration (ROP) has gained considerable interest in the drilling industry because it is the most-effective way to improve the efficiency of drilling and reduce the operating costs. One way to enhance...

...Danial Etesami; Mehrdad G. Shirangi; W. J. Zhang Summary In this paper, we present an accurate semiempirical rate of penetration (ROP) predictive model for polycrystalline diamond compact (PDC) bits. Our model is inspired by the model of Bourgoyne and Young (B&Y) and follows an exponential form...

...Eric Schumacker; Philip Volgelsberg Summary Slimhole well design can reduce well–construction cost through a reduction in steel, fluids, and disposal costs. In the industry, there has been a misconception that slimhole size involves the tradeoff of slower rate of penetration (ROP) and less...

...Shilin Chen; Yazan Khlefat; Chris Cleboski; Seth Anderle; Zakaria Maouche Summary This paper discusses a new and general method of backup-cutter layout to extend bit life without sacrificing rate of penetration (ROP) and two field-case studies. This method includes the following aspects: Ensuring...

...Torbjørn Pedersen; John-Morten Godhavn Summary This work presents a new multivariable controller for management of topside and bottomhole objectives during underbalanced drilling (UBD). A model predictive control (MPC) solution is used to control pressures, rate of penetration (ROP), and flow...

.... This is a significant challenge for fixed PDC bits, requiring a compromise that limits vibration mitigation in some sections of the well and/or top-end rate-of-penetration (ROP) performance in other sections. This paper presents an innovative PDC bit that can self-adjust its DOC-control characteristics...

... of penetration (ROP) in a pressure-critical wellbore environment. Formerly, ROP and bottomhole pressure (BHP) have been considered separate optimization and automation tasks, respectively. This study combines ROP and BHP into a single comprehensive controller for a managed-pressure-drilling (MPD) application...

... is encountered in the shallow part of the wellbore. Conventional design called for roller-cone (RC) (IADC Code 111-115) drill bits on positive-displacement motors (PDMs) in these ultralarge-diameter intervals. Cost savings on drilling fluid alone, in the form of rate-of-penetration (ROP) gains through the salt...

... show that C t increases as nozzle-jet velocity and HSI (hydraulic horsepower per square inch of bit) increase. Comparing C t with rate-of-penetration (ROP) data available in the literature revealed that the rate of C t change is less than that of ROP as HSI changes. C t decreased slightly in a bit...

... and transit formations are detailed in the paper. 8 4 2013 31 10 2013 10 10 2013 9 12 2013 25 3 2013 29 12 2013 Copyright 2013, Society of Petroleum Engineers force-balanced group blade order nose zone cutter group Upstream Oil & Gas cutter layout ROP...

... friedheim concentration investigation WSM december 2011 engineering operation van Oort cutter optimization rop bit design drilling time stability MPSR bit selection pdc bit sandstone downhole motor torque kuwait march 2011 optimize high-pressure high-temperature exploration activity...

... 26 5 2011 20 9 2010 13 6 2011 Copyright 2011, Society of Petroleum Engineers real time system borehole quality Upstream Oil & Gas Artificial Intelligence Dupriest footage hole section june 2011 redesign whirl limiter wob drilling operation ROP instability NPT...

... and whirl at high RPM. This gives the hybrid bit a wider operating window and greatly improves toolface control in directional drilling. The hybrid drill bit is a highly application-specific drill bit aimed at (1) traditional roller-cone applications that are rate-of-penetration (ROP) limited, (2) large...

... in the achievement of the project goal with the drilling of the entire 22-in. section with one bit from shoe to shoe. The performance improvements in the trial wells gave substantial increases in rate of penetration (ROP) and reduced drilling times. The latest designs of TCI bits were the result of an extensive...

... reports, digital data, technical literature, and engineering analysis for the two wells. A cumulative fatigue analysis (CFA) modeling technique taking into account specific well conditions [i.e., wellbore geometry, rotary speed, rate of penetration (ROP), hook load, and drillstring configuration...

... Oil & Gas Thonhauser completion real-time rig-sensor data case study performance indicator wellbore treatment time september 2007 ROP connection time SPE Drilling drilling time analysis information operation recognition reporting BHA run real time system knowledge management...

... quality along the wellbore, on the basis of the volume-equalized power-law model. Tests were conducted to determine the effects of inclination angle, foam quality, foam velocity, and rate of penetration (ROP) on cuttings transport. Results from this study show that the in-situ cuttings concentration...