... Abstract Determining the contact forces between the drillstring and wellbore wall remains a computational challenge; one that prevents real-time estimation of complex downhole mechanics. In order to achieve automation of engineering analysis for real-time dysfunction detection and response...

... revealed the merit in using metrics of downhole axial load transfer efficiency and downhole obstruction capacity (among others) to compare the scenarios. This showed that the field behavior seen during earlier runs with floating centralizers aligned with running mechanics that can be predicted...

... daneshy extension horizontal well principal stress fracture perforation wellbore completion installation and operations liner completion spaced cluster randomness axial fracture initiation separation mechanics society of petroleum engineers Background Hydraulic fracturing operations...

..., and integration events. In our pilot projects, proactive learning cycles involve three interrelated knowledge domains: mechanical design, engineering mechanics, and materials science. The starting points, end goal, and number of learning cycles are determined, but not the specific goals of intermediate learning...

... the initiative. In many areas of the world, including the Gulf of Mexico (GOM), hydrocarbon reservoirs exist below thick non-porous and impermeable sequences of salt that are considered a perfect cap rock. However, salt poses varied levels of drilling challenges due to its unique mechanical properties...

... was developed to characterize the material failure mechanisms that play a significant role during the shale rock maturation process. The numerical model developed consists of coupled solid deformation, pore pressure, and fracture propagation. Benchmark tests were conducted to validate model accuracy. Laboratory...

... proppant fracture growth particle proppant particle fracture geometry hydraulic fracture proppant transport mechanics Introduction Hydraulic fracturing (HF) stimulation maintains the position of one of the most efficient technologies from both technological and economical points of view...

... Abstract The objective of this paper is to share the results obtained from in-depth analysis using a down hole mechanics and dynamics monitoring sub, which lead to the first successful Gullfaks Satellite 14 ¾ x 17 ½ -in Rathole elimination operation through challenging lithology. Shallow gas...

..., and wide and short fractures ( Agarwal & Sharma, 2011a ). Although a large number of hydraulic fracturing operations have been performed in soft formations, the exact mechanisms of failure remain an unresolved issue. There are several experimental studies and theoretical modeling approaches...

... equations with focus on drilling risers. Therefore, the equations relate to tension, however, the equations are likewise valid for compression. C.P Sparks' paper was published thirty years ago, however, the effects described are also found in classical mechanics. In the Von Mises fracture criterion...

.... Variational Principles In the realm of Mechanics, a variational principle is a mathematical method aiming to produce the equations of motion for any given system as the solution to a minimization problem. Such formalism translates into Hamilton's Principle (principle of stationary action) which is more...

... (in contrast to conventional models). Stress dependence of coal permeability and permeability anisotropy were shown to be the controlling mechanisms. This model was then used to investigate height growth mechanisms. After considering the results of the analysis, its limitations, uncertainties in geological...

... pressure ductile failure shale society of petroleum engineers mechanics deformation Introduction The shapes of drill-bit cuttings play an important role in drilling operations. Cuttings morphology impacts the effectiveness of cuttings transport up the annulus and the potential...

... cement chemistry cement Cement System effective stress constitutive law spe 116651 wellbore integrity Upstream Oil & Gas cement sheath damage evaluation display MPa loading sheath shrinkage casing and cementing variation mechanical property cement hydration mechanics integrity...

...) to actual well conditions ? This paper gives answers to these questions in comparing results obtained from existant models with results obtained from an advanced model dedicated to drillstring mechanics. Firslty, this paper presents the new developements integrated in a recently advanced model...

... is the protection of the groundwater. In both liquid or solid injection wells, groundwater protection is accomplished through both the mechanical integrity of the casing/tubing system and annulus isolation with cement. For solid injection into geologic zones that are not highly naturally fractured...

... Abstract Pigging has been recognized as the most cost-effective method for preventing flow restriction by wax deposits in subsea flowlines. However, the piping mechanics for wax removal in pipelines is still very poorly understood. A unique test facility was designed and constructed...

... employ, to a lesser or greater extent, the same basic theory of fracture propagation - first put forward in the 1920’s and used in the original 2-D fracture models – known as Linear Elastic Fracture Mechanics, or LEFM. Although the various organisations producing fracture propagation models have...

... reduction gear Lower clutch and brake Lower Oldham coupling A schematic illustration of the deflection mechanics section is shown in Fig. 5 . The bent mechanics of RCDOS is composed of a bias unit for bending the shaft, two positioning sensors for the double eccentric ring plates in the bias...

..., extensional -viscosity considerations become all-important and the observed pressure losses are against any expectation based on conventional fluid mechanics. The relevance of these critical conditions, after scaledown, to practical porous medium flow is under active consideration. Flow visualization studies...