Patents Assigned to Distrigaz
  • Process and device for blocking a well opening out in the ceiling of an underground cavity for low temperature storage
    Patent number: 4580924
    Abstract: To block the mouth of a well (1) opening out in the ceiling of an underground cavity (2), a part (4) in the shape of a keystone is used, which has a hole through the middle for the passage of pipes (31, 32), suitable cements are then poured in to make the whole system integral, and the well is filled.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: April 8, 1986
    Assignees: Societe Francaise de Stockage Geostock, Distrigaz
    Inventors: Alain Boulanger, Walter G. M. M. Luyten