| 摘要 |
A centraliser 120 for a downhole tubular 124 comprises a body 122 and a plurality of formations 126 upstanding from the body, at least part of the centraliser comprising a swellable material selected to expand on exposure to at least one predetermined fluid. The formations may comprise a swellable material selected to expand on exposure to hydrocarbon fluid. The formations may be arranged to create turbulent flow for fluid passing the apparatus, maybe blades and may be helically oriented on the body. |
