In order to treat and remediate ground contaminated with hazardous materials, long horizontal wells are often beneficial around the contaminated sites. While it is possible to drill and case these holes using existing technology, it is difficult and expensive to install perforated liners to give access to the formations. A procedure has been developed and is described wherein a DIAjet system is...

The drill pipe model described by the wave equation with boundary conditions is reduced through the d’Alembert transformation to a difference equation model. Assuming that the boundary condition at the bottom is perturbed by bounded additive noise, an ultimate bound for the velocity at the bottom of the pipe is obtained. The proposal of a Lyapunov functional for the distributed model allows to ...

Introduction: A neutrino observatory planned for South Pole offers an opportunity to collect a timesequenced 100,000-yr record of micrometeorites and terrestrial dust deposited in Antarctic ice with 20–100yr resolution. This unprecedented record bears on numerous studies including the evolution of near-Earth cosmic-dust and the provenance of micrometeorites, the relationship between ET influx a...

Fluid Flow during the circulation of drilling fluid is an important parameter that affects process successful lifting cuttings activities. Researcher analyzed regimes flow in vertical wells through analysis velocity calculation pipeline at conditions Drillpipe (v DP) 21.11791 fps and drill collar DC) 42.98293 fps, annulus between Casing Drill pipe 1.14993 1.373781 Open Hole pipe, 1.594947 Colla...

As an important tool for tripping of a drill-string, drill-pipe (DP)-slip system directly affects both the service life DP and target depth it can reach. In this paper, finite element (FE) model programmed in ABAQUS is used to simulate interactions within DP-slip system. For model, materials, geometric dimensions, loads, boundary conditions were determined from actual A special attention has be...