As the core accoutrement of directional drilling construction, measurement while (MWD) device can be divided into three types due to different data transmission methods: wired, mud pulse and electromagnetic wave. This paper used method develop a MWD for mines, working principle signal transmission, encoding structure were described. Experimental research showed that wireless had advantages long...

For the past three decades the quantity of petroleum (both oil and oil plus gas) found per foot of drilling effort in the United States for any given year can be expressed as a secular decrease of about 2 percent per year combined with an inverse function of drilling effort for that year. Extrapolation of energy costs and gains from petroleum drilling and extraction indicates that drilling for ...

this investigation presents the effect of various parameters on foam stability and its rheological properties. the underlying idea of this experiment is generating of drilling foam with uniform bubbles. the main problem of foam using is controlling its stability during field application. the most important parameters which cause instability in foam are gravity drainage, gas diffusion and bubble...

Abstract Wellbore instability is frequently encountered in the process of shale oil drilling. Due to anisotropic strength characteristics shale, most conventional models are not suitable for wellbore stability analysis layered formation. In this paper, taking continental north Songliao Basin as research object, elasticity and parameters measured experimentally. Based on pore elastic mechanics, ...

Abstract— Due to the superior physical and mechanical properties Glass fiber-reinforced (GFRP) composite materials are very attractive for applications like aerospace and air craft structural components. This results a large number of research papers on machining of these composite laminates. Out of all the machining operations, most commonly used operation is drilling. However, drilling operat...

Because neurosurgery and orthopedic surgery often require the drilling of bones, this paper attempts to solve the problem of bone drilling. The goal is to realize a control system, which is able to drill with a contact drilling force and can automatically stop drilling at the moment of breaking through. In particular, both the de drilling mntor control and the feed rate control are driven by fo...

Bone drilling is widely used in orthopaedics and surgery; it is a technically demanding surgical procedure. Recent technological improvements in this area are focused on efforts to reduce forces in bone drilling. This study focuses on forces and a torque required for conventional and ultrasonically-assisted tool penetration into fresh bovine cortical bone. Drilling tests were performed with two...

The main challenge in deviated and horizontal well drilling is hole cleaning, which involves the removal of drill cuttings maintaining a clean borehole. Insufficient cleaning can lead to issues such as stuck pipe incidents, lost circulation, slow rate penetration (ROP), difficult tripping operations, poor cementing, formation damage. advancements real-time evaluation for complex wells also trou...

In this research, finite element analysis of the conventional drilling and vibration assisted drilling is carried out. The ABAQUS software is employed for FE analysis. The Johnson-Cook models for both plastic deformation and damage are employed for FE simulation.The results of the FE analysis are then verified with experimental results in both conventional and vibration assisted drilling on Al ...

drilling fluid is the most important lifeline of the drilling operation, that main task is facilitate the cuttings removal of the drilling. there are varieties of drilling fluids such as sodium bentonite based-drilling fluid is called “mud” and drilling foam or surfactant based-drilling fluid is called “soap”. the present work aims are study on the modified drilling mud properties by using the ...