Abstract: A heating installation for the productive zone of the reservoir of a well for the extraction of hydrocarbons through a well linking the surface to this reservoir, including a substantially cylindrical casing consolidating the wellbore and hydrocarbon extraction method housed inside the casing and method enabling a hot heat-transfer fluid to be injected from the surface to the reservoir. The installation includes through the well a first thermally insulated tubing of injection of the hot fluid from the surface to the reservoir, second tubing surrounding the first tubing to return the hot fluid to the surface and a third tubing to extract the hydrocarbons independent from the first and second tubing, the tubings extending from the surface to the reservoir.

Abstract: A heating installation for hydrocarbon extraction pipes via a well linking the surface to an extraction zone, including a substantially cylindrical casing consolidating the drill hole, a hydrocarbon extraction method and method to enable a hot fluid to be made to circulate from the surface to the well zone to be heated. The injection method includes in the casing first thermally insulated heating tubing to inject the hot fluid from the surface to the required depth and second heating tubing surrounding the first tubing to bring the hot fluid towards the surface and the extraction method includes a pumping tubing surrounding the first and second heating tubing for the extraction of hydrocarbons.

Abstract: A thermally insulated pipe for transporting fluids, being connectable to at least one further pipe, is disclosed herein. The pipe comprises an outer pipe wall and an inner pipe wall substantially parallel to the outer pipe wall and configured to contain a fluid within the pipe. The inner pipe wall comprises a body portion and a connection portion extending therefrom, a thermal insulation layer provided between the outer pipe wall and the body portion of the inner pipe wall, and at least one male joinable end. The male joinable end comprises the connection portion of the inner pipe wall which terminates in a connection component adapted to engage a connection component of a further pipe, and a transition region where the outer pipe wall tapers continuously inwardly to meet the connection portion of the inner pipe wall.