Procedure and device for the perforation of underground galleries. (Machine-translation by Google Translate, not legally binding)
Номер патента: ES439093A1
Опубликовано: 16-05-1977
Автор(ы):
Принадлежит: GEWARKSCHAFT EISENHUTTE WESTFA, Hochtief AG
Опубликовано: 16-05-1977
Автор(ы):
Принадлежит: GEWARKSCHAFT EISENHUTTE WESTFA, Hochtief AG
Реферат: Procedure and device for drilling underground galleries, especially tunnels and similar, ensuring the cavity that remains free in the area of the end piercing, by means of a shield dragged in the direction of drilling, and behind it by a shoring with elements of shoring where appropriate, in the form of a ring or in the form of an arc, the method of which is characterized in that the shoring elements are inserted inside a follower shield or the like which ensures the perforation cross section, at least in the roof area, before the follower shield is advanced in the direction of perforation, with respect to the or to the shoring elements that remain in their placed position, constantly overlapping them at least in the area of the roof. (Machine-translation by Google Translate, not legally binding)
Methods and devices for one trip plugging and perforating of oil and gas wells
Номер патента: US09777558B1. Автор: Andrew M. Ferguson,Stanley W. Loving,Bryan F. Mckinley,Dale Norman. Владелец: Thru Tubing Solutions Inc. Дата публикации: 2017-10-03.