In the case where “side door” or latching elevators are used, the spacing of the seal system is even more critical and the seal must be engaged in the tubular prior to latching the elevators below the upset portion of the tubular. This requires that the seal be engaged in the tubular ...
connected to sleeve30to hold it against rotation. Those skilled in the art will appreciate that the tubular body10can be rotated with respect to sleeves28and30to secure thread22to thread24. This situation could become necessary if a sudden rise in pressure from the well below occurs and press...