Sentence examples for string impacts from inspiring English sources
Drill string impacts on the wellbore wall often have important effects on wellbore instability.
In particular, shallower formations are affected more by drill string impacts than deeper ones.
The results show that drill string impacts greatly influence wellbore instability or enlargement.
Numerous studies have focused on the problem of wellbore instability or enlargement; however, most have focused on the physical chemical interactions between the rock (especially shales) and the drilling fluid and have ignored the effects of drill string impacts.
This paper presents a model for calculating drill string impacts on a wellbore wall based on an experimental study, principles of rock mechanics and rock damage mechanics and the Drucker Prager yield criterion.
The law of rock fragmentation during drill string impacts is investigated using simulations; later, relationships between the rock fragmentation volume and the drill string impact are developed under different conditions (contact lengths of the drill string, impact speeds, rotation speeds, well depths and rock softening).
The dynamical interaction of elastic string under impact impulse and the essentially nonlinear absorber is considered too.
Under Mr. Foer, The New Republic published a string of high-impact articles, including a profile by Ryan Lizza of Senator George Allen of Virginia that was seen as playing a major role in Mr. Allen's political downfall.
After breaking her foot filming 1979's The China Syndrome, the 44-year-old actress created a string of low-impact, balletic workouts that became a female fitness craze in the 1980s.
It could be a string of low-intensity impacts that accumulate over time, the kind of ongoing soreness that would convince a person to take a break from the gym or change their routine the kind a dog can't tell you about and won't always show.
They constructed models of trawlers with string to visualise the impact on the sea floor, and investigated more sustainable alternatives, such as farming fish like sea bass and tilapia.
