Steel and elastomer assembly that has a central through-passage equal to or greater in diameter than the riser bore and that may be positioned in the riser string to reduce local bending stresses.
The Mazatec people are an indigenous people who inhabit an area known as the Sierra Mazateca in the state of Oaxaca in southern Mexico, as well as some communities in the adjacent states of Puebla and Veracruz.
Mexicans (Spanish: Mexicanos) are the people of the United Mexican States, a multiethnic country in North America. Mexicans can also be those who identify with the Mexican cultural or national identity. The Mexica founded Mexico-Tenochtitlan in 1325 as an altepetl (city-state) located on an island in Lake Texcoco, in the Valley of Mexico. It became the capital of the expanding Mexica Empire in the 15th century, until captured by the Spanish in 1521.