| 摘要 |
PCT No. PCT/NZ95/00012 Sec. 371 Date Aug. 14, 1996 Sec. 102(e) Date Aug. 14, 1996 PCT Filed Feb. 14, 1995 PCT Pub. No. WO95/21986 PCT Pub. Date Aug. 17, 1995Improvements in casing installation components are described. The modified construction comprises radial support pedestals (2) incorporating rollers (3) on the outside of the support pedestals so that the rollers reduce longitudinal friction between the component and the well bore. The improvements described may be adapted for use in the construction of casing centralizers, float shoes, float collars and similar equipment which is inserted into the well bore. |
