| 摘要 |
<p>The present disclosure relates to an air-can, riser tensioning device for use in the production of oil and gas at offshore locations. The riser tensioning device includes at least one air-can (65) used to place a vertical force on the riser. The air-can including an open port that extends into the water toward the sea floor to a depth sufficient to prevent water from entering or air from leaving the air-can during its upward and downward vertical movements while in use. The present disclosure also relates to a novel manufacturing method for fabricating air-cans out of one material and fabricating the open port out of another material. The open port's material being made from a material that is more corrosion resistant than the material the air-can is fabricated from. The disclosure also relates to a novel manufacturing method for fabricating a passage in one soft tank for fluid communication with a second soft tank, and connecting the second soft tank with the passage.</p> |
