... loss performance and a thin filter cake, a recipe to keep differential sticking in check. The target reservoir was an aeolian sandstone with a porosity of 19% and permeability in the tens of millidarcy range. Additional steps taken to mitigate sticking risks included good borehole cleaning practices...

... Common challenges encountered in the offset wells from nearby fields were the following: severe mechanical wellbore instability and wellbore collapsing (Shinai formation), high risk of differential sticking in low pressure - high permeability reservoirs (Upper and Lower Nia, Noi, and Ene...

... the sticking mechanisms of formation testing and fluid sampling tool strings, and provides specific recommendations for the planning and execution of such operations. The various factors that lead to differential sticking or keyseating of the tool string and the wireline cable are discussed. A dataset...

..." and the law ofArchimedes, as applied to deviated wellbores. loading buoyancy factor drillstring design pipe strength differential sticking axial stress aadnøy drillpipe spe 56628 strength equation pull force andersen axial load friction drilling operation upstream oil & gas torque...

... in this field was that the friction factor in open hole was less than 0,4 when tripping. However, differential sticking seriously impeded weight transfer while drilling. A solids free drilling fluid was regarded as the best choice for improving weight transfer. No problems were observed due to differential...

... number of relevant parameters and quantitatively examine risk levels as adjustments are made. Direct measurement of mudcake properties at the wellsite will further enhance the risk assessment accuracy. P. 79 differential sticking mudcake drilling fluids and materials differential pressure...

... the risk of differential sticking. Extensive laboratory testing was carried out under both laminar and turbulent flow conditions so as to ascertain optimal performance prior to drilling the depleted reservoir section(s). Laminar flow was selected as the fluid flow regime most suited for optimal...

... conditions and time of filtration on sticking tendency is also discussed. Tests reported here were carried out at a pressure of 100 psi and ambient temperature. A new apparatus which more accurately simulates downhole conditions has now been constructed. differential sticking filtration differential...