Tubular structure and a method of manufacturing thereof

A tubular structure prepared by a process comprising:

• rotating a tubular mandrel about a longitudinal axis of the tubular mandrel, wherein the tubular mandrel is vertically-oriented;
• depositing a composite material on an inner surface of the tubular mandrel as the tubular mandrel is rotated so as to form a composite tubular member on the inner surface of the tubular mandrel, wherein the composite tubular member includes one or more sections having an increased thickness compared to other sections of the composite tubular member;
• inserting an inner expandable mandrel within the composite tubular member;
• expanding the inner expandable mandrel so as to cause the inner expandable mandrel to press the composite tubular member against the inner surface of the tubular mandrel;
• curing the composite tubular member while being sandwiched between the inner expandable mandrel and the tubular mandrel;
• removing the inner expandable mandrel;
• inserting a frame within the composite tubular member, wherein the frame is a geodesic frame comprising two oppositely-wound spirals joined at intersection points of the two oppositely-wound spirals, and wherein pitch and number of coils of the two oppositely-wound spirals cause the geodesic frame to have space for windows to be formed at the one or more sections having the increased thickness, wherein the tubular structure further comprises an end plate coupled to respective ends of the two oppositely-wound spirals;
• and
• removing the tubular mandrel so as to obtain the composite tubular member with the frame placed therein.