Maybe viscosity in drilling fluid is the most important parameter because cutting removal from well are task of viscose fluid. If viscosity of fluid is less than particular value, cutting will settle down in well and drilling operation will be stopped. In this study, synthesis of Alumina/Polyacrylamide nanocomposite through solution polymerization method was performed. Rheological behavior of m...

Maybe viscosity in drilling fluid is the most important parameter because cutting removal from well are task of viscose fluid. If viscosity of fluid is less than particular value, cutting will settle down in well and drilling operation will be stopped. In this study, synthesis of Alumina/Polyacrylamide nanocomposite through solution polymerization method was performed. Rheological behavior of m...

Drilling is the most common machining operation and it forms the highest machining cost in many manufacturing activities including automotive engine production. The outcome of this operation depends upon many factors including utilization of proper cutting tool geometry, cutting tool material and the type of coating used to improve hardness and resistance to wear, and also cutting parameters. W...

This paper reports a comprehensive survey of well drilling time and cost. The models include both specific correlations on various types generalised for rough estimation. are derived from robust multivariable regression to minimise the residuals. Africa has highest construction cost component in United States lowest. Data regions compared with European World average data. Drilling Italy is simi...

Downhole drilling motors or mud motors are frequently used during the oil and gas well construction, especially for construction of directional and horizontal segments. However, low operation life of the down hole drilling motors and high rate of wear in their working elements may constrain their application due to technical and economical disadvantageousness. In this work, a high-torque modula...

In the present study, five modeling approaches of RA, MLP, MNN, GFF, and CANFIS were applied so as to estimate the radial overcut values in electrochemical drilling process. For these models, four input variables, namely electrolyte concentration, voltage, initial machining gap, and tool feed rate, were selected. The developed models were evaluated in terms of their prediction capability with m...

Blast furnace slag (BFS) was added into drilling fluid as a mud cake modifier (MCM) for the reuse of BFS. The effects of MCM on drilling fluid rheology and shear strength of cementformation interface (SSCFI) were evaluated. The experimental results showed that the optimized formula of the drilling fluid has 1.0 wt% MCM. The simulation results showed that SSCFI increased significantly with the a...

In this paper, to identify the roof unconfined compressive strength (UCS) in process of coal mine roadway support real-time and optimize drilling speed while drilling, paper proposes establishes a test method for assessing uniaxial roof. This can be used drilling. Moreover, mathematical model power output is developed roof-strata identification system with system. The results were as follows: (...

objective: recently the laparoscopic ovarian drilling (lod) has been used as a surgical treatment for ovulation in women with polycystic ovarian syndrome (pcos), although its mechanism and outcomes are still unclear. this study was undertaken to evaluate the in vitro fertilization (ivf)/intracytoplasmic sperm injection (icsi) outcomes in clomiphene-resistant women with pcos who were treated wit...