Patent ID: 6510900
Filing Date: 2003-01-28
Classification: E21B

Abstract:
A seal assembly for dual string coil tubing injection into a subterranean well comprising:a seal plate adapted to be connected to a wellhead, the seal plate having a top surface and a bottom surface; a first bore extending through the seal plate between the top and bottom surfaces, the first bore retaining a first annular seal adapted to provide a high-pressure fluid seal around a first coil tubing string inserted therethrough; a second bore extending through the seal plate between the first and second surface, the second bore retaining a second annular seal adapted to provide a high-pressure fluid seal around a second coil tubing string inserted therethrough; and means for directing lubricant to the first and second annular seals to permit the annular seals to be respectively lubricated when the respective first and second coil tubing strings are injected into and extracted from the wellhead.