| 摘要 |
PCT No. PCT/NO95/00057 Sec. 371 Date Nov. 5, 1996 Sec. 102(e) Date Nov. 5, 1996 PCT Filed Mar. 21, 1995 PCT Pub. No. WO95/25876 PCT Pub. Date Sep. 28, 1995A multi-operational inflatable packer, particularly for use in oil and gas wells, comprises an outer rubber layer (5), at least two cord layers (6, 7) internal to the outer rubber layer (5), and an inner rubber layer (8); the cord layers comprise yarn of aramide fibers. The cord layers are arranged as one inner and one outer cord layer (6, 7), which are not embedded in rubber. The inner cord layer (7) comprises a thin yarn, and the outer cord layer (6) comprises a thicker yarn. Inner and outer cord layers (6, 7) are at the end of the packer anchored by a pressure sleeve (3). A packer ring of high tensile steel is situated within the pressure sleeve in direction against the packer (1), preferably having a yield strength above 700 MPa. |
