1-20 of 38
Keywords: drilling fluid
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1683
... effective methods to solve this problem(Chen et al., 2001). Below the floating collar, there is generally air or liquid with low density, while above the floating collar is drilling fluid, which reduces the floating weight of unit length casing in the drilling fluid, so as to achieve the purpose of reducing...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1688
... ABSTRACT: Studying the changes of deep mudstone strength properties after hydration are vital for the design of well drilling and proper choice of drilling fluid for deep wellbore stability. However, the previous methods (Coupled with conventional immersion test and compressive test...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1619
... algorithm were used to improve the convergence speed of iterative calculation. The effects of cuttings size, drill pipe eccentricity, drill pipe rotation speed and drilling fluid rheology on the transportation of small size cuttings in the horizontal eccentric annulus was studied. The distribution...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0074
... the open-hole extended-reach limits of RDM and dual gradient RDM with those of conventional offshore drilling and dual gradient drilling. Sensitivity analysis is performed to illustrate the effects of drilling fluid density, drilling fluid flow rate and flow behavior index on the open-hole extended-reach...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2075
.... As an example application, the model has been applied to a typical wellbore drilled in the Bohai oilfield of China, where serious wellbore instability problems have been frequently encountered when the fractured shale formations of Dongying group is drilled through. The influences of drilling fluid density...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2082
... and/or casing will result in failure of the cement sheath and poor zonal isolation causing hazard to the environment. The mains reasons for poor cement integrity are the drilling fluid contamination, as well as the pipe and casing string corrosions, as both of these create deposition of mechanically inferior...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1683
... ABSTRACT: During drilling operations, the wellbore stability is affected by many factors. One of the most significant factors that degrade the wellbore stability is the change in the mechanical properties of the drilled formation because of the interaction with the drilling fluid filtrate...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1725
...-solid coupling numerical model of wellbore stability, which considering phase transformation, is established in this paper. The influence of drilling fluid temperature on the plastic yielding area around the wellbore during the drilling process in the frozen soil was analyzed. The results show...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1858
..., the decomposition of hydrate around the wellbore will slow down. This will cause the reduction of the cohesion of hydrate formation, which may increase the lower limit of drilling fluid density window and easily leads to collapse of wellbore. The speeds of these three effects are different. When the influence...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-075
... ABSTRACT: Imbibition of drilling fluid into shale formations significantly changes the mechanical properties of shales potentially causing swelling or disintegration of shale matrix and resulting in time dependent well integrity. This requires an accurate evaluation of the shale mechanical...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1059
... of the formation is also treated as anisotropic to honor the fact that drilling fluid infiltration along the fracture direction is easier than that along the direction normal to the fracture plane. Furthermore, an inertia-based stabilizing method that we have proposed previously is employed to overcome...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1280
... increases, the cuttings axial velocity increases. The relationship between the cuttings velocity and the drilling fluid velocity is established by defining cuttings tangential velocity coefficient and cuttings axial velocity coefficient. The cuttings tangential velocity coefficient and cuttings axial...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-447
... ABSTRACT: In this study, the water absorbability and acoustic characteristics of coal were measured at downhole temperature and pressure, considering the effects of different kinds of drilling fluids. The inversion was conducted based on these data and revealed the change of internal...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-198
... in southern Iraq were implemented to investigate the influence of drilling practices, tools, and rheological properties on the borehole pressure variation. The combination of the drilling fluid density, yield point, plastic viscosity, BHA size, slip to slip time, tripping speed and the depth of investigations...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-175
... tubulars. Thirdly, the properties of drilling mud also have strong impacts on the extended-reach limit and should be optimized in advance. Directional Drilling Thickness dissociation pressure stability horizontal well drilling operation drilling fluid pressure drop hydrate collapse pressure...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0706
... ABSTRACT: The one of the biggest risks, when drilling in the naturally fractured formation, is the lost circulation that could result in wellbore instability. This risk is mainly caused by natural fracture propagating. Therefore, drilling fluid with solid plugging materials is used to plug...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0855
... ABSTRACT: A novel theoretical model is introduced to characterize the invasion of Bingham Plastic drilling fluid into natural fractures. The effect of fluid leak-off into the formation matrix is incorporated using Carter’s model. Various injection profiles from wellbore to natural fracture...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0317
... strength international journal in-situ stress hydro-mechanical model coal mass borehole breakout friction angle stability penetration drilling fluid permeability Qinshui Basin fluid density deformation 1. INTRODUCTION Economic production of methane from coal seams has been actively pursued...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0280
... ABSTRACT: A novel reciprocating valve equipment used to rapidly transfer downhole information to the surface during drilling process is designed with the purpose of greatly improving the generation rate of the drilling fluid continuous wave signal. The research is primarily focused...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-513
... diffusivity decreases. This work is useful for shale characterization and provides a correlation, which can have various applications including, but not limited to, wellbore stability prediction during well planning. Introduction Prolonged exposure of shale formations with aqueous drilling fluids has...

Product(s) added to cart

Close Modal