Results 81 to 90 of about 504,172 (167)
Strengthening shale wellbore with silica nanoparticles drilling fluid
Petroleum, 2016 Nanoparticles have been widely used to reduce wellbore instability problems of shale formation. In this paper, nanoparticle-containing water-based drilling fluids (WBDFs) and oil-based drilling fluids (OBDFs) were evaluated by running three new tests ...
Yili Kang +4 more
doaj +1 more source
A Model for Predicting Borehole Wall Stability in High Stress Fractured Formations
Zuanjingye yu wanjingyeTo deal with the wellbore collapse and instability problems encountered in drilling the broken marine carbonate formations in Shunbei and western Sichuan, a visual true triaxial wellbore instability physical simulation experimental platform was prepared ...
Weiji WANG, Dujie ZHANG
doaj +1 more source
Effect of Drillstring Vibration Cyclic Loads on Wellbore Stability
, 2017 Wellbore instability resulted in the largest percentage of non-productive time (NPT) during drilling stage in oil industry. Wellbore instability during drilling includes: wellbore pack-off, excessive torque and drag, blowout, stuck pipe and other related
Eissa M Shokir, Mohamed Shafik Khaled
core +1 more source
Wellbore stability in geomechanics [PDF]
Borehole instabilities can be encountered at any stage in the life of a well and they are the main cause of drilling difficulties, resulting in substantial expenditures, expensive loss of time, sometimes even in the loss of part of or even whole ...
Xu, Guangquan
core +3 more sources
Characterization of Shale-Drilling Fluid Interaction Mechanisms Related to Wellbore Instability
, 1996 Wellbore stability problems tend to occur during the drilling phase in shale sections, hence the understanding of shale-drilling fluid interaction mechanisms is essential if wellbore instability is to be avoided when drilling through shale sections.
Musaed N.J. Al-Awad, B.G.D. Smart
core +1 more source
Determination of Optimum Mud Weight Window for Tanuma Formation in Southern Iraq
Journal of EngineeringProblems with borehole instability contribute to an increase in non-productive time, mostly when drilling shale rocks. Drilling in this layer has several issues, including mud loss, tight holes, mechanically stuck pipes, caving, and large holes ...
Hussien Luqman Abd +1 more
doaj +1 more source
Risk Analysis of Wellbore Instability of “Felt Layer” in Qiudong Sag Based on Monte Carlo Method
Both domestic and international scholars have conducted in-depth research on wellbore stability issues. They have established various empirical models, analytical models, and numerical simulation methods.
Jian Chen +3 more
core +1 more source
Wellbore stability in geomechanics [PDF]
, 2007 Borehole instabilities can be encountered at any stage in the life of a well and they are the main cause of drilling difficulties, resulting in substantial expenditures, expensive loss of time, sometimes even in the loss of part of or even whole ...
Xu, Guangquan
core
, 2017 Wellbore instability is a widespread problem when drilling in shale formations particularly with water based drilling fluid. The main reason for the occurrence of wellbore instability is that stress concentration and pore pressure redistribution occur ...
Yu BH +8 more
core +1 more source
A fracture sliding potential index for wellbore stability analysis
, 2010 Sliding failure along the fractures intersecting a wellbore is one of the major wellbore instability mechanisms. This kind of failure is similar to the slope instabilities, a well-known phenomenon in mining and civil engineering.
Rasouli, Vamegh +3 more
core +2 more sources