Patent ID: 9637885
Date: 2017-05-02
CPC Classifications: E01F,E02D

Claim:
1. A safety device to be installed in a well, comprising: a support structure arranged to be lowered at least partly into a well and that restricts movement of the safety device in a horizontal direction; a collar in connection with the support structure and arranged to be set against a ground to restrict movement of the safety device in a vertical direction; a protective dome-shaped structure arranged on the collar to define a safe working area around the well; said protective dome-shaped structure having curved pillars, each pillar having one end located at a top surface of the collar and an opposite end of each pillar being located at the top surface so that the pillars have a bent elongate semi-circular shape to form the dome-shaped structure on top of the collar; a bottom of the dome-shaped structure forming a round or circular shape both in a horizontal and vertical direction so that there is no straight vertical portion of the dome-shaped structure; and the collar having an outer diameter (D