When coiled tubing is run inside of conventional tubing it is often referred to as a velocity string and the space between the outside of the coiled tubing and the inside of the conventional tubing is referred to as themicro annulus. In some cases gas is produced up into the micro annulus.
Here's The First Instagram Photo Ever. Four years ago today on July 16, 2010, Instagram CEO and co-founder Kevin Systrom uploaded the first photo to the app, which was called Codename at the time. This picture of a golden retriever was taken at a taco stand called Tacos Chilakos, and the foot belongs to Systrom's girlfriend, according to a spokesperson for Instagram.
The First Ever YouTube Video. The first video to ever be uploaded to YouTube isn't a classic by any means. Shot by Yakov Lapitsky at the San Diego Zoo it shows co-founder Jawed Karim in front of the elephant enclosure going on about long trunks. It has, nonetheless, racked up a very healthy 4,282,497 views since its online debut on April 23, 2005.