...Zheng Zhang; Shangqing Yang; Guorong Wang; Jingpeng Wang; Jingsheng Lu; Lin Zhong; Geng Peng; Ganghui Pan The high temperature in the horizontal section and bottom of a horizontal well has a significant impact on the performance of mud and the safety of drilling equipment. The high bottomhole...

...Jialin Tian; Lei Tang; Baoyong Yan; Haolin Song; Lanhui Mao Aiming at the problem of low drilling efficiency of oil and gas wells due to the high friction during the drilling, a dual-piston axial oscillation drag reduction tool (DAOT) is proposed to reduce friction for long drill string...

...Salem Al-Gharbi; Abdulaziz Al-Majed; Abdulazeez Abdulraheem; Zeeshan Tariq; Mohamed Mahmoud The age of easy oil is ending, and the industry started drilling in remote unconventional conditions. To help produce safer, faster, and most effective operations, the utilization of artificial intelligence...

...Erik Andreas Løken; Jens Løkkevik; Dan Sui In recent years, drilling digitalization and automation have advanced from being automation of rig floor equipment to an idea that is starting to be applied to entire drilling processes. However it is very costly in terms of field testing and validating...

...Jialin Tian; Haili Yang; Liming Dai; Yinglin Yang; Haolin Song Internal motion and dynamics mechanism studies of a new composite percussion drilling tool aim at reducing stick-slip phenomenon and improving rock breaking efficiency. In this study, experiments are performed using composite percussion...

... approximately the same accuracy as does the full Founargiotakis model. It is shown that the use of such a parallel plate model gives reasonably good fit to measured data on laminar flow of oil-based drilling fluids if the viscous data are measured at relevant shear rates for the flow. Laboratory measurements...

...Ahmed K. Abbas; Salih Rushdi; Mortadha Alsaba; Mohammed F. Al Dushaishi Predicting the rate of penetration (ROP) is a significant factor in drilling optimization and minimizing expensive drilling costs. However, due to the geological uncertainty and many uncontrolled operational parameters...

...Alfred W. Eustes, III 23 08 2011 06 09 2011 09 10 2011 12 12 2011 12 12 2011 drilling separation two-phase flow underwater vehicles This special edition of the Journal of Energy Resources Technology is to highlight nine papers that were presented...

...John Shelton; John Rogers Smith; Anuj Gupta 17 11 2011 18 11 2011 02 12 2011 02 12 2011 drilling separation This article was erroneously published in the September issue. It should have been published in the December special issue on R&D in Offshore Petroleum...

...Luiz F. P. Franca This paper presents a new model of the drilling response of roller-cone bits. First, a set of relations between the weight-on-bit W , the torque-on-bit T , the rate of penetration V , and the angular velocity Ω is established in the spirit of the model developed...

...M. Nasiri; S. N. Ashrafizadeh; A. Ghalambor Ester-based drilling fluids based on aliphatic esters were introduced in 1990. Esters can be synthesized from fatty acids and alcohols. Previous studies indicated that ester hydrolysis in drilling fluids happens only under certain conditions. In order...

...Kent Perry Although the microhole coiled tubing drilling rigs have been used extensively in Canada, their application in the U.S. has been very limited. In an effort to introduce this technology to the U.S. operators, GTI, with the support of DOE∕NETL, has completed a successful field testing...

...David W. Raymond; M. A. Elsayed; Yarom Polsky; Scott S. Kuszmaul Drilling costs are significantly influenced by bit performance when drilling in offshore formations. Retrieving and replacing damaged downhole tools is an extraordinarily expensive and time-intensive process, easily costing several...

...K. David Lyons; Simone Honeygan; Thomas Mroz The U.S. Department of Energy’s National Energy Technology Laboratory (NETL) established the Extreme Drilling Laboratory to engineer effective and efficient drilling technologies viable at depths greater than 20,000 ft. This paper details the challenges...

...Kenneth Bhalla, Ph.D.; Lixin Gong, Ph.D.; George K. McKown A state of the art graphical user interface program has been developed to predict and design the bottom-hole assembly (BHA) performance for drilling. The techniques and algorithms developed in the program are based on those developed...

... conventional subsea control system so that they can work solely or as a backup of other methods. Most important, the innovative all-electric BOP will provide much faster response than its hydraulic counterpart and will improve safety for subsea drilling. To demonstrate the feasibility of such a device, a proof...

... deflection. The mathematical models include (1) differential equations; (2) boundary conditions of drill bit, stabilizer, diameter change, tangent point, and bore hole wall; (3) methods for calculating lateral forces and deflection angles of the bit; and (4) models for determining navigation ability...

...M. A. Elsayed Drill strings are used in oil and gas production as well as geothermal wells. They experience destructive vibrations, many of which are highly dependent on drill string modes. In this paper, we show that the lowest frequency modes are not necessarily the most critical and we delineate...

...G. Robello Samuel Drilling operations in deep and ultradeep water are increasing around the world. The development of these substantial prospects provides many challenges and requires the integration of knowledge with prudent designs at different stages of the well development. Also, more wells...

...Ahmet S. Yigit; Andreas P. Christoforou Drillstring vibrations and in particular stick-slip and bit-bounce are detrimental to oil-well drilling operations. Controlling these vibrations is essential because they may cause equipment failures and damage to the oil-well. A simple model that adequately...